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Calculating the Applied Load

The LM Guide is capable of receiving loads and moments in all directions that are generated due to the mounting orientation, alignment, gravity center position of a traveling object, thrust position and cutting resistance.

Calculating an Applied Load

Single-Axis Use

Moment Equivalence

When the installation space for the LM Guide is limited, you may have to use only one LM block, or double LM blocks closely contacting with each other. In such a setting, the load distribution is not uniform and, as a result, an excessive load is applied in localized areas (i.e., both ends) as shown in Fig.2 . Continued use under such conditions may result in flaking in those areas, consequently shortening the service life. In such a case, calculate the actual load by multiplying the moment value by any one of the equivalent-moment factors specified in Table1 to Table6 .

An equivalent-load equation applicable when a moment acts on an LM Guide is shown below.

P Equivalent load per LM Guide (N)
K Equivalent moment factor
M Applied moment (N･mm)
Equivalent Factor

Since the rated load is equivalent to the permissible moment, the equivalent factor to be multiplied when equalizing the MA MB,MCmoments to the applied load per block is obtained by dividing the rated loads in the corresponding directions.With those models other than 4-way equal load types, however, the load ratings in the 4 directions differ from each other. Therefore, the equivalent factor values for the MAand MCmoments also differ depending on whether the direction is radial or reverse radial.

Equivalent Factors for the MAMoment
Equivalent Factors for the MBMoment
Equivalent Factors for the MCMoment
C0 Basic static load rating (radial direction) (N)
C0L Basic static load rating (reverse radial direction) (N)
C0T Basic static load rating (lateral direction) (N)
PR Calculated load (radial direction) (N)
PL Calculated load (reverse radial direction) (N)
PT Calculated load (lateral direction) (N)
Table1 Equivalent Factors (Models SHS, SSR, SVR, SVS, SHW and SRS)
Model No. Equivalent factor in the MA radial direction when one LM block is used Equivalent factor in the MA reverse radial direction when one LM block is used Equivalent factor in the MA radial direction when two LM blocks are used in close contact with each other Equivalent factor in the MA reverse radial direction when two LM blocks are used in close contact with each other MB Equivalent factor when one LM block is used MB Equivalent factor when two LM blocks are used in close contact with each other Equivalent factor in the MC radial direction Equivalent factor in the MC reverse radial direction
KAR1 KAL1 KAR2 KAL2 KB1 KB2 KCR KCL
SHS 15 1.38×10-1 2.69×10-2 1.38×10-1 2.69×10-2 1.50×10-1
15L 1.07×10-1 2.22×10-2 1.07×10-1 2.22×10-2 1.50×10-1
20 1.15×10-1 2.18×10-2 1.15×10-1 2.18×10-2 1.06×10-1
20L 8.85×10-2 1.79×10-2 8.85×10-2 1.79×10-2 1.06×10-1
25 9.25×10-2 1.90×10-2 9.25×10-2 1.90×10-2 9.29×10-2
25L 7.62×10-2 1.62×10-2 7.62×10-2 1.62×10-2 9.29×10-2
30 8.47×10-2 1.63×10-2 8.47×10-2 1.63×10-2 7.69×10-2
30L 6.52×10-2 1.34×10-2 6.52×10-2 1.34×10-2 7.69×10-2
35 6.95×10-2 1.43×10-2 6.95×10-2 1.43×10-2 6.29×10-2
35L 5.43×10-2 1.16×10-2 5.43×10-2 1.16×10-2 6.29×10-2
45 6.13×10-2 1.24×10-2 6.13×10-2 1.24×10-2 4.69×10-2
45L 4.79×10-2 1.02×10-2 4.79×10-2 1.02×10-2 4.69×10-2
55 4.97×10-2 1.02×10-2 4.97×10-2 1.02×10-2 4.02×10-2
55L 3.88×10-2 8.30×10-3 3.88×10-2 8.30×10-3 4.02×10-2
65 3.87×10-2 7.91×10-3 3.87×10-2 7.91×10-3 3.40×10-2
65L 3.06×10-2 6.51×10-3 3.06×10-2 6.51×10-3 3.40×10-2
SSR 15XW(XTB) 2.08×10-1 1.04×10-1 3.75×10-2 1.87×10-2 1.46×10-1 2.59×10-2 1.71×10-1 8.57×10-2
15XV(XSB) 3.19×10-1 1.60×10-1 5.03×10-2 2.51×10-2 2.20×10-1 3.41×10-2 1.71×10-1 8.57×10-2
20XW(XTB) 1.69×10-1 8.46×10-2 3.23×10-2 1.62×10-2 1.19×10-1 2.25×10-2 1.29×10-1 6.44×10-2
20XV(XSB) 2.75×10-1 1.37×10-1 4.28×10-2 2.14×10-2 1.89×10-1 2.89×10-2 1.29×10-1 6.44×10-2
25XW(XTB) 1.41×10-1 7.05×10-2 2.56×10-2 1.28×10-2 9.86×10-2 1.77×10-2 1.10×10-1 5.51×10-2
25XV(XSB) 2.15×10-1 1.08×10-1 3.40×10-2 1.70×10-2 1.48×10-1 2.31×10-2 1.10×10-1 5.51×10-2
30XW(XTB) 1.18×10-1 5.91×10-2 2.19×10-2 1.10×10-2 8.26×10-2 1.52×10-2 9.22×10-2 4.61×10-2
30XV(XSB) 1.85×10-1 9.24×10-2 4.69×10-2 2.34×10-2 1.27×10-1 3.19×10-2 9.16×10-2 4.58×10-2
35XW(XTB) 1.01×10-1 5.03×10-2 1.92×10-2 9.60×10-3 7.04×10-2 1.33×10-2 7.64×10-2 3.82×10-2
35XV(XSB) 1.58×10-1 7.91×10-2 4.04×10-2 2.02×10-2 1.09×10-1 2.75×10-2 7.59×10-2 3.80×10-2
SVR 25 1.13×10-1 7.28×10-2 2.25×10-2 1.45×10-2 7.14×10-2 1.43×10-2 9.59×10-2 6.17×10-2
25L 9.14×10-2 5.88×10-2 1.85×10-2 1.19×10-2 5.80×10-2 1.17×10-2 9.59×10-2 6.17×10-2
30 1.01×10-1 6.50×10-2 1.89×10-2 1.21×10-2 6.36×10-2 1.19×10-2 8.45×10-2 5.43×10-2
30L 7.56×10-2 4.86×10-2 1.57×10-2 1.01×10-2 4.79×10-2 1.00×10-2 8.45×10-2 5.43×10-2
35 9.19×10-2 5.91×10-2 1.68×10-2 1.08×10-2 5.77×10-2 1.06×10-2 7.08×10-2 4.55×10-2
35L 6.80×10-2 4.37×10-2 1.39×10-2 8.97×10-3 4.31×10-2 8.86×10-3 7.08×10-2 4.55×10-2
45 6.73×10-2 4.33×10-2 1.35×10-2 8.71×10-3 4.25×10-2 8.59×10-3 5.32×10-2 3.42×10-2
45L 5.40×10-2 3.47×10-2 1.10×10-2 7.09×10-3 3.41×10-2 6.97×10-3 5.30×10-2 3.41×10-2
55 5.89×10-2 3.79×10-2 1.14×10-2 7.35×10-3 3.72×10-2 7.24×10-3 4.63×10-2 2.98×10-2
55L 4.55×10-2 2.92×10-2 9.45×10-3 6.08×10-3 2.89×10-2 6.02×10-3 4.63×10-2 2.98×10-2
65 4.85×10-2 3.12×10-2 1.01×10-2 6.48×10-3 3.06×10-2 6.40×10-3 3.91×10-2 2.51×10-2
65L 3.58×10-2 2.30×10-2 7.73×10-3 4.97×10-3 2.28×10-2 4.93×10-3 3.91×10-2 2.51×10-2
SVS 25 1.09×10-1 9.14×10-2 2.17×10-2 1.82×10-2 1.00×10-1 2.00×10-2 9.95×10-2 8.35×10-2
25L 8.82×10-2 7.40×10-2 1.78×10-2 1.50×10-2 8.13×10-2 1.64×10-2 9.95×10-2 8.35×10-2
30 9.71×10-2 8.15×10-2 1.82×10-2 1.52×10-2 8.95×10-2 1.67×10-2 8.78×10-2 7.37×10-2
30L 7.29×10-2 6.11×10-2 1.51×10-2 1.27×10-2 6.72×10-2 1.39×10-2 8.78×10-2 7.37×10-2
35 8.84×10-2 7.42×10-2 1.61×10-2 1.35×10-2 8.14×10-2 1.48×10-2 7.36×10-2 6.17×10-2
35L 6.56×10-2 5.50×10-2 1.34×10-2 1.13×10-2 6.04×10-2 1.24×10-2 7.36×10-2 6.17×10-2
45 6.48×10-2 5.44×10-2 1.30×10-2 1.09×10-2 5.98×10-2 1.20×10-2 5.45×10-2 4.57×10-2
45L 5.22×10-2 4.38×10-2 1.07×10-2 8.94×10-3 4.81×10-2 9.81×10-3 5.44×10-2 4.56×10-2
55 5.67×10-2 4.76×10-2 1.10×10-2 9.24×10-3 5.23×10-2 1.01×10-2 4.78×10-2 4.01×10-2
55L 4.39×10-2 3.68×10-2 9.12×10-3 7.65×10-3 4.05×10-2 8.40×10-3 4.78×10-2 4.01×10-2
65 4.67×10-2 3.92×10-2 9.72×10-3 8.15×10-3 4.30×10-2 8.95×10-3 4.04×10-2 3.39×10-2
65L 3.46×10-2 2.90×10-2 7.46×10-3 6.26×10-3 3.19×10-2 6.88×10-3 4.04×10-2 3.39×10-2
SHW 12 2.48×10-1 4.69×10-2 2.48×10-1 4.69×10-2 1.40×10-1
12HR 1.70×10-1 3.52×10-2 1.70×10-1 3.52×10-2 1.40×10-1
14 1.92×10-1 3.80×10-2 1.92×10-1 3.80×10-2 9.93×10-2
17 1.72×10-1 3.41×10-2 1.72×10-1 3.41×10-2 6.21×10-2
21 1.59×10-1 2.95×10-2 1.59×10-1 2.95×10-2 5.57×10-2
27 1.21×10-1 2.39×10-2 1.21×10-1 2.39×10-2 4.99×10-2
35 8.15×10-2 1.64×10-2 8.15×10-2 1.64×10-2 3.02×10-2
50 6.22×10-2 1.24×10-2 6.22×10-2 1.24×10-2 2.30×10-2
SRS 5M 6.33×10‒1 9.20×10-2 6.45×10-1 9.30×10-2 3.85×10-1
5GM 6.71×10-1 9.15×10-2 6.66×10-1 9.08×10-2 3.85×10-1
5N 5.23×10-1 7.87×10-2 5.32×10-1 7.99×10-2 3.86×10-1
5GN 5.25×10-1 7.97×10-2 5.33×10-1 8.12×10-2 3.84×10-1
5WM 4.48×10‒1 7.30×10-2 4.56×10-1 7.40×10-2 1.96×10-1
5WGM 4.58×10-1 7.39×10-2 4.54×10-1 7.34×10-2 1.96×10-1
5WN 3.31×10-1 5.93×10-2 3.36×10-1 6.02×10-2 1.96×10-1
5WGN 3.31×10-1 5.97×10-2 3.35×10-1 6.05×10-2 1.96×10-1
7S 6.03×10-1 7.65×10-2 6.27×10-1 7.91×10-2 2.58×10-1
7GS 5.92×10-1 7.89×10-2 6.14×10-1 8.17×10-2 2.58×10-1
7M 4.19×10‒1 6.76×10-2 4.18×10-1 6.94×10-2 2.58×10-1
7GM 4.27×10-1 6.04×10-2 4.43×10-1 6.23×10-2 2.34×10-1
7N 2.97×10-1 5.35×10-2 3.07×10-1 5.50×10-2 2.58×10-1
7GN 3.11×10-1 5.35×10-2 3.20×10-1 5.51×10-2 2.58×10-1
7WS 4.67×10-1 6.89×10-2 4.84×10-1 7.08×10-2 1.36×10-1
7WGS 5.23×10-1 6.75×10-2 5.43×10-1 6.95×10-2 1.36×10-1
7WM 3.01×10-1 5.32×10-2 3.00×10-1 5.46×10-2 1.36×10-1
7WGM 2.83×10-1 4.87×10-2 2.93×10-1 5.02×10-2 1.24×10-1
7WN 2.19×10-1 4.16×10-2 2.24×10-1 4.28×10-2 1.36×10-1
7WGN 2.20×10-1 4.17×10-2 2.27×10-1 4.31×10-2 1.36×10-1
  • KAR1:Equivalent factor in the MAradial direction when one LM block is used
  • KAL1:Equivalent factor in the MAreverse radial direction when one LM block is used
  • KAR2:Equivalent factor in the MAradial direction when two LM blocks are used in close contact with each other
  • KAL2:Equivalent factor in the M A reverse radial direction when two LM blocks are used in close contact with each other
  • KB1:M B Equivalent factor when one LM block is used
  • KB2:M B Equivalent factor when two LM blocks are used inclose contact with each other
  • KCR  : MCEquivalent factor in the radial direction
  • KCL  : MCEquivalent factor in the reverse radial direction
Table2 Equivalent Factors (Models SRS, SCR, EPF and HSR)
Model No. Equivalent factor in the MA radial direction when one LM block is used Equivalent factor in the MA reverse radial direction when one LM block is used Equivalent factor in the MA radial direction when two LM blocks are used in close contact with each other Equivalent factor in the MA reverse radial direction when two LM blocks are used in close contact with each other MB Equivalent factor when one LM block is used MB Equivalent factor when two LM blocks are used in close contact with each other Equivalent factor in the MC radial direction Equivalent factor in the MC reverse radial direction
KAR1 KAL1 KAR2 KAL2 KB1 KB2 KCR KCL
SRS 9XS 4.86×10-1 6.89×10-2 5.04×10-1 7.11×10-2 2.17×10-1
9XGS 5.37×10-1 6.77×10-2 5.57×10-1 7.00×10-2 2.17×10-1
9XM 2.95×10-1 5.27×10-2 3.06×10-1 5.43×10-2 2.17×10-1
9XGM 3.10×10-1 5.28×10-2 3.19×10-1 5.44×10-2 2.17×10-1
9XN 2.13×10-1 4.12×10-2 2.19×10-1 4.23×10-2 2.17×10-1
9XGN 2.18×10-1 4.14×10-2 2.24×10-1 4.27×10-2 2.17×10-1
9WS 4.10×10-1 5.73×10-2 4.25×10-1 5.63×10-2 1.06×10-1
9WGS 4.16×10-1 5.80×10-2 4.30×10-1 5.98×10-2 1.06×10-1
9WM 2.37×10-1 4.25×10-2 2.44×10-1 4.37×10-2 1.06×10-1
9WGM 2.41×10-1 4.80×10-2 2.41×10-1 4.13×10-2 1.06×10-1
9WN 1.74×10-1 3.35×10-2 1.78×10-1 3.44×10-2 1.06×10-1
9WGN 1.75×10-1 3.38×10-2 1.73×10-1 3.32×10-2 1.06×10-1
12S 4.55×10-1 5.60×10-2 4.55×10-1 5.60×10-2 1.52×10-1
12GS 5.04×10-1 5.51×10-2 5.04×10-1 5.51×10-2 1.52×10-1
12M 2.94×10-1 4.50×10-2 2.94×10-1 4.50×10-2 1.53×10-1
12GM 2.93×10-1 4.49×10-2 2.93×10-1 4.49×10-2 1.53×10-1
12N 1.86×10-1 3.51×10-2 1.86×10-1 3.51×10-2 1.53×10-1
12GN 1.96×10-1 3.50×10-2 1.96×10-1 3.50×10-2 1.53×10-1
12WS 3.22×10-1 5.00×10-2 3.22×10-1 5.00×10-2 7.97×10-2
12WGS 3.32×10-1 5.07×10-2 3.32×10-1 5.07×10-2 7.97×10-2
12WM 2.00×10-1 3.69×10-2 2.00×10-1 3.69×10-2 7.97×10-2
12WGM 2.07×10-1 3.64×10-2 2.07×10-1 3.64×10-2 7.96×10-2
12WN 1.44×10-1 2.83×10-2 1.44×10-1 2.83×10-2 7.97×10-2
12WGN 1.46×10-1 2.85×10-2 1.46×10-1 2.85×10-2 7.95×10-2
15S 3.56×10-1 4.38×10-2 3.56×10-1 4.38×10-2 1.41×10-1
15GS 3.37×10-1 4.57×10-2 3.37×10-1 4.57×10-2 1.41×10-1
15M 2.17×10-1 3.69×10-2 2.17×10-1 3.69×10-2 1.41×10-1
15GM 2.31×10-1 3.61×10-2 2.31×10-1 3.61×10-2 1.41×10-1
15N 1.43×10-1 2.73×10-2 1.43×10-1 2.73×10-2 1.41×10-1
15GN 1.45×10-1 2.75×10-2 1.45×10-1 2.75×10-2 1.41×10-1
15WS 2.34×10-1 3.76×10-2 2.34×10-1 3.76×10-2 4.83×10-2
15WGS 2.34×10-1 3.81×10-2 2.34×10-1 3.81×10-2 4.84×10-2
15WM 1.67×10-1 2.94×10-2 1.67×10-1 2.94×10-2 4.83×10-2
15WGM 1.63×10-1 2.93×10-2 1.63×10-1 2.93×10-2 4.83×10-2
15WN 1.13×10-1 2.27×10-2 1.13×10-1 2.27×10-2 4.83×10-2
15WGN 1.15×10-1 2.28×10-2 1.15×10-1 2.28×10-2 4.83×10-2
20M 1.80×10-1 3.30×10-2 1.86×10-1 3.41×10-2 9.34×10-2
20GM 2.10×10-1 3.88×10-2 2.10×10-1 3.87×10-2 1.03×10-1
25M 1.14×10-1 2.17×10-2 1.14×10-1 2.17×10-2 8.13×10-2
25GM 1.23×10-1 2.32×10-2 1.23×10-1 2.32×10-2 8.75×10-2
SCR 15S 1.38×10-1 2.69×10-2 1.38×10-1 -
20S 1.15×10-1 2.18×10-2 1.15×10-1 -
20 8.85×10-2 1.79×10-2 8.85×10-2 -
25 9.25×10-2 1.90×10-2 9.25×10-2 1.90×10-2 -
30 8.47×10-2 1.63×10-2 8.47×10-2 1.63×10-2 -
35 6.95×10-2 1.43×10-2 6.95×10-2 1.43×10-2 -
45 6.13×10-2 1.24×10-2 6.13×10-2 1.24×10-2 -
65 3.87×10-2 7.91×10-3 3.87×10-2 7.91×10-3 -
EPF 7M 3.55×10-1 - 3.55×10-1 - 2.86×10-1
9M 3.10×10-1 - 3.10×10-1 - 2.22×10-1
12M 2.68×10-1 - 2.68×10-1 - 1.67×10-1
15M 2.00×10-1 - 2.00×10-1 - 1.34×10-1
HSR 8 4.39×10-1 6.75×10-2 4.39×10-1 6.75×10-2 2.97×10-1
10 3.09×10-1 5.33×10-2 3.09×10-1 5.33×10-2 2.35×10-1
12 2.08×10-1 3.74×10-2 2.08×10-1 3.74×10-2 1.91×10-1
15 1.66×10-1 2.98×10-2 1.66×10-1 2.98×10-2 1.57×10-1
15L 1.18×10-1 2.33×10-2 1.18×10-1 2.33×10-2 1.57×10-1
20 1.26×10-1 2.28×10-2 1.26×10-1 2.28×10-2 1.17×10-1
20L 9.88×10-2 1.92×10-2 9.88×10-2 1.92×10-2 1.17×10-1
25 1.12×10-1 2.02×10-2 1.12×10-1 2.02×10-2 9.96×10-2
25L 8.23×10-2 1.70×10-2 8.23×10-2 1.70×10-2 9.96×10-2
30 8.97×10-2 1.73×10-2 8.97×10-2 1.73×10-2 8.24×10-2
30L 7.05×10-2 1.44×10-2 7.05×10-2 1.44×10-2 8.24×10-2
35 7.85×10-2 1.56×10-2 7.85×10-2 1.56×10-2 6.69×10-2
35L 6.17×10-2 1.29×10-2 6.17×10-2 1.29×10-2 6.69×10-2
45 6.73×10-2 1.21×10-2 6.73×10-2 1.21×10-2 5.20×10-2
45L 5.22×10-2 1.01×10-2 5.22×10-2 1.01×10-2 5.20×10-2
55 5.61×10-2 1.03×10-2 5.61×10-2 1.03×10-2 4.26×10-2
55L 4.35×10-2 8.56×10-3 4.35×10-2 8.56×10-3 4.26×10-2
65 4.49×10-2 9.13×10-3 4.49×10-2 9.13×10-3 3.68×10-2
65L 3.29×10-2 7.08×10-3 3.29×10-2 7.08×10-3 3.68×10-2
85 3.49×10-2 6.94×10-3 3.49×10-2 6.94×10-3 2.78×10-2
85L 2.74×10-2 5.72×10-3 2.74×10-2 5.72×10-3 2.78×10-2
100 2.61×10-2 5.16×10-3 2.61×10-2 5.16×10-3 2.24×10-2
120 2.37×10-2 4.72×10-3 2.37×10-2 4.72×10-3 1.96×10-2
150 2.17×10-2 4.35×10-3 2.17×10-2 4.35×10-3 1.61×10-2
15M2A 1.65×10-1 2.89×10-2 1.65×10-1 2.89×10-2 1.86×10-1
20M2A 1.23×10-1 2.23×10-2 1.23×10-1 2.23×10-2 1.34×10-1
25M2A 1.10×10-1 1.98×10-2 1.10×10-1 1.98×10-2 1.14×10-1
  • KAR1:Equivalent factor in the MAradial direction when one LM block is used
  • KAL1:Equivalent factor in the MAreverse radial direction when one LM block is used
  • KAR2:Equivalent factor in the MAradial direction when two LM blocks are used in close contact with each other
  • KAL2:Equivalent factor in the M A reverse radial direction when two LM blocks are used in close contact with each other
  • KB1:M B Equivalent factor when one LM block is used
  • KB2:M B Equivalent factor when two LM blocks are used inclose contact with each other
  • KCR:Equivalent factor in the MCradial direction
  • KCL:Equivalent factor in the MCreverse radial direction
Table3 Equivalent Factors (Models SR, NR-X and NR)
Model number Equivalent factor in the MA radial direction when one LM block is used Equivalent factor in the MA reverse radial direction when one LM block is used Equivalent factor in the MA radial direction when two LM blocks are used in close contact with each other Equivalent factor in the MA reverse radial direction when two LM blocks are used in close contact with each other MB Equivalent factor when one LM block is used MB Equivalent factor when two LM blocks are used in close contact with each other Equivalent factor in the MC radial direction Equivalent factor in the MC reverse radial direction
KAR1 KAL1 KAR2 KAL2 KB1 KB2 KCR KCL
SR 15W(TB) 2.08×10-1 1.04×10-1 3.72×10-2 1.86×10-2 1.46×10-1 2.57×10-2 1.69×10-1 8.43×10-2
15V(SB) 3.40×10-1 1.70×10-1 5.00×10-2 2.50×10-2 2.34×10-1 3.37×10-2 1.69×10-1 8.43×10-2
20W(TB) 1.71×10-1 8.56×10-2 3.23×10-2 1.61×10-2 1.20×10-1 2.24×10-2 1.28×10-1 6.40×10-2
20V(SB) 2.69×10-1 1.34×10-1 4.34×10-2 2.17×10-2 1.86×10-1 2.95×10-2 1.28×10-1 6.39×10-2
25W(TB) 1.37×10-1 6.85×10-2 2.57×10-2 1.29×10-2 9.61×10-2 1.78×10-2 1.09×10-1 5.47×10-2
25V(SB) 2.15×10-1 1.08×10-1 3.47×10-2 1.73×10-2 1.49×10-1 2.36×10-2 1.10×10-1 5.48×10-2
30W(TB) 1.14×10-1 5.71×10-2 2.21×10-2 1.10×10-2 8.01×10-2 1.54×10-2 9.16×10-2 4.58×10-2
30V(SB) 1.98×10-1 9.92×10-2 2.98×10-2 1.49×10-2 1.37×10-1 2.01×10-2 9.16×10-2 4.58×10-2
35W(TB) 1.04×10-1 5.21×10-2 1.91×10-2 9.57×10-3 7.30×10-2 1.32×10-2 7.59×10-2 3.80×10-2
35V(SB) 1.70×10-1 8.50×10-2 2.61×10-2 1.31×10-2 1.17×10-1 1.77×10-2 7.59×10-2 3.80×10-2
45W(TB) 9.11×10-2 4.56×10-2 1.69×10-2 8.44×10-3 6.38×10-2 1.17×10-2 5.67×10-2 2.83×10-2
55W(TB) 6.85×10-2 3.42×10-2 1.37×10-2 6.86×10-3 4.80×10-2 9.57×10-3 5.38×10-2 2.69×10-2
NR-X 25 1.19×10-1 7.64×10-2 2.24×10-2 1.43×10-2 7.47×10-2 1.41×10-2 9.69×10-2 6.20×10-2
25L 9.18×10-2 5.87×10-2 1.85×10-2 1.18×10-2 5.78×10-2 1.17×10-2 9.69×10-2 6.21×10-2
30 9.95×10-2 6.37×10-2 1.90×10-2 1.21×10-2 6.23×10-2 1.19×10-2 8.55×10-2 5.47×10-2
30L 7.65×10-2 4.89×10-2 1.57×10-2 1.00×10-2 4.82×10-2 9.91×10-3 8.55×10-2 5.47×10-2
35 9.08×10-2 5.81×10-2 1.69×10-2 1.08×10-2 5.67×10-2 1.06×10-2 7.17×10-2 4.59×10-2
35L 6.88×10-2 4.40×10-2 1.40×10-2 8.96×10-3 4.32×10-2 8.81×10-3 7.17×10-2 4.59×10-2
45 7.02×10-2 4.50×10-2 1.35×10-2 8.64×10-3 4.37×10-2 8.39×10-3 5.31×10-2 3.40×10-2
45L 5.25×10-2 3.36×10-2 1.11×10-2 7.11×10-3 3.31×10-2 7.05×10-3 5.32×10-2 3.41×10-2
55 5.92×10-2 3.79×10-2 1.15×10-2 7.36×10-3 3.72×10-2 7.21×10-3 4.66×10-2 2.98×10-2
55L 4.66×10-2 2.98×10-2 9.43×10-3 6.02×10-3 2.92×10-2 5.93×10-3 4.65×10-2 2.98×10-2
65 5.12×10-2 3.28×10-2 1.00×10-2 6.40×10-3 3.21×10-2 6.31×10-3 3.93×10-2 2.52×10-2
65L 3.66×10-2 2.34×10-2 7.73×10-3 4.93×10-3 2.31×10-2 4.89×10-3 3.93×10-2 2.52×10-2
NR 75 4.21×10-2 2.99×10-2 8.31×10-3 5.90×10-3 3.08×10-2 6.13×10-3 3.16×10-2 2.24×10-2
75L 3.14×10-2 2.23×10-2 6.74×10-3 4.78×10-3 2.33×10-2 5.04×10-3 3.16×10-2 2.24×10-2
85 3.70×10-2 2.62×10-2 7.31×10-3 5.19×10-3 2.71×10-2 5.40×10-3 2.80×10-2 1.99×10-2
85L 2.80×10-2 1.99×10-2 6.07×10-3 4.31×10-3 2.08×10-2 4.55×10-3 2.80×10-2 1.99×10-2
100 3.05×10-2 2.17×10-2 6.20×10-3 4.41×10-3 2.26×10-2 4.63×10-3 2.38×10-2 1.69×10-2
100L 2.74×10-2 1.95×10-2 5.46×10-3 3.87×10-3 2.00×10-2 4.00×10-3 2.38×10-2 1.69×10-2
  • KAR1  : Equivalent factor in the MA radial direction when one LM block is used
  • KAL1  : Equivalent factor in the MA reverse radial direction when one LM block is used
  • KAR2  : Equivalent factor in the MA radial direction when two LM blocks are used in close contact with each other
  • KAL2  : Equivalent factor in the MA reverse radial direction when two LM blocks are used in close contact with each other
  • KB1  : MB Equivalent factor when one LM block is used
  • KB2  : MB Equivalent factor when two LM blocks are used in close contact with each other
  • KCR  : Equivalent factor in the MC radial direction
  • KCL  : Equivalent factor in the MC reverse radial direction
Table4 Equivalent Factors (Models NRS-X, NRS, HRW, and RSX)
Model number Equivalent factor in the MA radial direction when one LM block is used Equivalent factor in the MA reverse radial direction when one LM block is used Equivalent factor in the MA radial direction when two LM blocks are used in close contact with each other Equivalent factor in the MA reverse radial direction when two LM blocks are used in close contact with each other MB Equivalent factor when one LM block is used MB Equivalent factor when two LM blocks are used in close contact with each other Equivalent factor in the MC radial direction Equivalent factor in the MC reverse radial direction
KAR1 KAL1 KAR2 KAL2 KB1 KB2 KCR KCL
NRS-X 25 1.15×10-3 9.66×10-2 2.16×10-2 1.81×10-2 1.06×10-1 1.98×10-2 9.51×10-2 7.99×10-2
25L 8.85×10-2 7.44×10-2 1.79×10-2 1.50×10-2 8.14×10-2 1.64×10-2 9.51×10-2 7.99×10-2
30 9.58×10-2 8.05×10-2 1.83×10-2 1.53×10-2 8.81×10-2 1.68×10-2 8.40×10-2 7.05×10-2
30L 7.38×10-2 6.20×10-2 1.51×10-2 1.27×10-2 6.79×10-2 1.39×10-2 8.40×10-2 7.05×10-2
35 8.73×10-2 7.33×10-2 1.62×10-2 1.36×10-2 8.03×10-2 1.49×10-2 7.04×10-2 5.91×10-2
35L 6.63×10-2 5.57×10-2 1.35×10-2 1.13×10-2 6.10×10-2 1.24×10-2 7.04×10-2 5.91×10-2
45 6.78×10-2 5.69×10-2 1.30×10-2 1.09×10-2 6.23×10-2 1.19×10-2 5.22×10-2 4.39×10-2
45L 5.07×10-2 4.26×10-2 1.07×10-2 8.99×10-3 4.66×10-2 9.86×10-3 5.22×10-2 4.39×10-2
55 5.71×10-2 4.79×10-2 1.10×10-2 9.24×10-3 5.25×10-2 1.01×10-2 4.58×10-2 3.84×10-2
55L 4.50×10-2 3.78×10-2 9.14×10-3 7.65×10-3 4.14×10-2 8.39×10-3 4.57×10-2 3.84×10-2
65 4.93×10-2 4.14×10-2 9.70×10-3 8.15×10-3 4.53×10-2 8.88×10-3 3.86×10-2 3.25×10-2
65L 3.54×10-2 2.97×10-2 7.47×10-3 6.30×10-3 3.25×10-2 6.86×10-3 3.86×10-2 3.25×10-2
NRS 75 4.05×10-2 8.01×10-3 4.05×10-2 8.01×10-3 3.20×10-2
75L 3.03×10-2 6.50×10-3 3.03×10-2 6.50×10-3 3.20×10-2
85 3.56×10-2 7.05×10-3 3.56×10-2 7.05×10-3 2.83×10-2
85L 2.70×10-2 5.87×10-3 2.70×10-2 5.87×10-3 2.83×10-2
100 2.93×10-2 5.97×10-3 2.93×10-2 5.97×10-3 2.41×10-2
100L 2.65×10-2 5.27×10-3 2.65×10-2 5.27×10-3 2.41×10-2
HRW 12 2.72×10-1 1.93×10-1 5.16×10-2 3.65×10-2 5.47×10-1 1.04×10-1 1.40×10-1 9.92×10-2
14 2.28×10-1 1.61×10-1 4.16×10-2 2.94×10-2 4.54×10-1 8.28×10-2 1.01×10-1 7.18×10-2
17 1.96×10-1 3.34×10-2 1.96×10-1 3.34×10-2 6.30×10-2
21 1.65×10-1 2.90×10-2 1.65×10-1 2.90×10-2 5.89×10-2
27 1.30×10-1 2.34×10-2 1.30×10-1 2.34×10-2 5.11×10-2
35 8.69×10-2 1.60×10-2 8.69×10-2 1.60×10-2 3.06×10-2
50 6.52×10-2 1.22×10-2 6.52×10-2 1.22×10-2 2.35×10-2
60 5.80×10-2 1.08×10-2 5.80×10-2 1.08×10-2 1.77×10-2
RSX 5M 6.68×10-1 9.11×10-2 6.80×10-1 9.24×10-2 3.86×10-1
5NM 5.25×10-1 8.01×10-2 5.36×10-1 8.12×10-2 3.86×10-1
5WM 4.58×10-1 7.39×10-2 4.65×10-1 7.51×10-2 1.96×10-1
5WNM 3.31×10-1 5.98×10-2 3.36×10-1 6.06×10-2 1.96×10-1
7SM 5.90×10-1 7.87×10-2 6.12×10-1 8.15×10-2 2.59×10-1
7M 4.72×10-1 6.68×10-2 4.87×10-1 6.88×10-2 2.59×10-1
7NM 3.10×10-1 5.18×10-2 3.20×10-1 5.33×10-2 2.59×10-1
7WSM 5.23×10-1 6.75×10-2 5.43×10-1 6.95×10-2 1.36×10-1
7WM 3.10×10-1 5.34×10-2 3.20×10-1 5.50×10-2 1.36×10-1
7WNM 2.21×10-1 4.18×10-2 2.27×10-1 4.32×10-2 1.36×10-1
9SM 5.37×10-1 6.77×10-2 5.57×10-1 7.00×10-2 2.17×10-1
9M 3.10×10-1 5.28×10-2 3.19×10-1 5.44×10-2 2.17×10-1
9NM 2.17×10-1 4.13×10-2 2.24×10-1 4.27×10-2 2.17×10-1
9WSM 4.16×10-1 5.80×10-2 4.30×10-1 5.98×10-2 1.06×10-1
9WM 2.31×10-1 4.31×10-2 2.38×10-1 4.43×10-2 1.06×10-1
9WNM 1.75×10-1 3.38×10-2 1.81×10-1 3.48×10-2 1.06×10-1
12SM 5.04×10-1 5.52×10-2 5.04×10-1 5.52×10-2 1.52×10-1
12M 2.96×10-1 4.55×10-2 2.96×10-1 4.55×10-2 1.52×10-1
12NM 1.96×10-1 3.50×10-2 1.96×10-1 3.50×10-2 1.52×10-1
12WSM 3.32×10-1 5.07×10-2 3.32×10-1 5.07×10-2 7.95×10-2
12WM 2.10×10-1 3.69×10-2 2.10×10-1 3.69×10-2 7.95×10-2
12WNM 1.46×10-1 2.85×10-2 1.46×10-1 2.85×10-2 7.95×10-2
15SM 3.36×10-1 4.58×10-2 3.36×10-1 4.58×10-2 1.41×10-1
15M 2.34×10-1 3.65×10-2 2.34×10-1 3.65×10-2 1.41×10-1
15NM 1.45×10-1 2.75×10-2 1.45×10-1 2.75×10-2 1.41×10-1
15WSM 2.34×10-1 3.81×10-2 2.34×10-1 3.81×10-2 4.82×10-2
15WM 1.66×10-1 2.97×10-2 1.66×10-1 2.97×10-2 4.82×10-2
15WNM 1.15×10-1 2.28×10-2 1.15×10-1 2.28×10-2 4.82×10-2
9M1 3.10×10-1 5.28×10-2 3.19×10-1 5.44×10-2 2.17×10-1
9M1N 2.17×10-1 4.13×10-2 2.24×10-1 4.27×10-2 2.17×10-1
9M1W 2.31×10-1 4.31×10-2 2.38×10-1 4.43×10-2 1.06×10-1
9M1WN 1.75×10-1 3.38×10-2 1.81×10-1 3.48×10-2 1.06×10-1
12M1 2.96×10-1 4.55×10-2 2.96×10-1 4.55×10-2 1.52×10-1
12M1N 1.96×10-1 3.50×10-2 1.96×10-1 3.50×10-2 1.52×10-1
12M1W 2.10×10-1 3.69×10-2 2.10×10-1 3.69×10-2 7.95×10-2
12M1WN 1.46×10-1 2.85×10-2 1.46×10-1 2.85×10-2 7.95×10-2
15M1 2.34×10-1 3.65×10-2 2.34×10-1 3.65×10-2 1.41×10-1
15M1N 1.45×10-1 2.75×10-2 1.45×10-1 2.75×10-2 1.41×10-1
15M1W 1.66×10-1 2.97×10-2 1.66×10-1 2.97×10-2 4.82×10-2
15M1WN 1.15×10-1 2.28×10-2 1.15×10-1 2.28×10-2 4.82×10-2
  • KAR1:Equivalent factor in the MAradial direction when one LM block is used
  • KAL1:Equivalent factor in the MAreverse radial direction when one LM block is used
  • KAR2:Equivalent factor in the MAradial direction when two LM blocks are used in close contact with each other
  • KAL2:Equivalent factor in the M A reverse radial direction when two LM blocks are used in close contact with each other
  • KB1:M B Equivalent factor when one LM block is used
  • KB2:M B Equivalent factor when two LM blocks are used inclose contact with each other
  • KCR:Equivalent factor in the MCradial direction
  • KCL:Equivalent factor in the MCreverse radial direction
Table5 Equivalent Factors (Models RSR and HR)
Model number Equivalent factor in the MA radial direction when one LM block is used Equivalent factor in the MA reverse radial direction when one LM block is used Equivalent factor in the MA radial direction when two LM blocks are used in close contact with each other Equivalent factor in the MA reverse radial direction when two LM blocks are used in close contact with each other MB Equivalent factor when one LM block is used MB Equivalent factor when two LM blocks are used in close contact with each other Equivalent factor in the MC radial direction Equivalent factor in the MC reverse radial direction
KAR1 KAL1 KAR2 KAL2 KB1 KB2 KCR KCL
RSR 2N 6.81×10-1 1.28×10-1 6.81×10-1 1.28×10-1 8.69×10-1
2WN 5.10×10-1 9.32×10-2 5.10×10-1 9.32×10-2 4.54×10-1
3M 9.20×10-1 1.27×10-1 9.20×10-1 1.27×10-1 6.06×10-1
3N 6.06×10-1 1.01×10-1 6.06×10-1 1.01×10-1 6.06×10-1
3W 7.03×10-1 1.06×10-1 7.03×10-1 1.06×10-1 3.17×10-1
3WN 4.76×10-1 8.27×10-2 4.76×10-1 8.27×10-2 3.17×10-1
9M1K 3.06×10-1 5.19×10-2 3.06×10-1 5.19×10-2 2.15×10-1
9M1N 2.15×10-1 4.08×10-2 2.15×10-1 4.08×10-2 2.15×10-1
9M1WV 2.44×10-1 4.22×10-2 2.44×10-1 4.22×10-2 1.09×10-1
9M1WN 1.73×10-1 3.33×10-2 1.73×10-1 3.33×10-2 1.09×10-1
12M1V 3.52×10-1 2.46×10-1 5.37×10-2 3.76×10-2 2.81×10-1 4.21×10-2 2.09×10-1 1.46×10-1
12M1N 2.30×10-1 1.61×10-1 4.08×10-2 2.85×10-2 1.85×10-1 3.25×10-2 2.09×10-1 1.46×10-1
12M1WV 2.47×10-1 1.73×10-1 4.38×10-2 3.07×10-2 1.99×10-1 3.49×10-2 1.02×10-1 7.15×10-2
12M1WN 1.71×10-1 1.20×10-1 3.36×10-2 2.35×10-2 1.38×10-1 2.70×10-2 1.02×10-1 7.15×10-2
14WV 2.10×10-1 1.47×10-1 3.89×10-2 2.73×10-2 1.69×10-1 3.10×10-2 8.22×10-2 5.75×10-2
15M1V 2.77×10-1 1.94×10-1 4.38×10-2 3.07×10-2 2.21×10-1 3.45×10-2 1.69×10-1 1.18×10-1
15M1N 1.70×10-1 1.19×10-1 3.24×10-2 2.27×10-2 1.37×10-1 2.59×10-2 1.69×10-1 1.18×10-1
15M1WV 1.95×10-1 1.36×10-1 3.52×10-2 2.46×10-2 1.56×10-1 2.80×10-2 5.83×10-2 4.08×10-2
15M1WN 1.34×10-1 9.41×10-2 2.68×10-2 1.88×10-2 1.09×10-1 2.16×10-2 5.82×10-2 4.08×10-2
20M1V 1.68×10-1 1.18×10-1 2.92×10-2 2.04×10-2 1.35×10-1 2.32×10-2 1.30×10-1 9.13×10-2
20M1N 1.20×10-1 8.39×10-2 2.30×10-2 1.61×10-2 9.68×10-2 1.84×10-2 1.30×10-1 9.13×10-2
HR 918 2.65×10-1 3.58×10-2 2.65×10-1 3.58×10-2 - -
1123 2.08×10-1 3.17×10-2 2.08×10-1 3.17×10-2 - -
1530 1.56×10-1 2.39×10-2 1.56×10-1 2.39×10-2 - -
2042 1.11×10-1 1.80×10-2 1.11×10-1 1.80×10-2 - -
2042T 8.64×10-2 1.53×10-2 8.64×10-2 1.53×10-2 - -
2555 7.79×10-2 1.38×10-2 7.79×10-2 1.38×10-2 - -
2555T 6.13×10-2 1.17×10-2 6.13×10-2 1.17×10-2 - -
3065 6.92×10-2 1.15×10-2 6.92×10-2 1.15×10-2 - -
3065T 5.45×10-2 9.92×10-3 5.45×10-2 9.92×10-3 - -
3575 6.23×10-2 1.08×10-2 6.23×10-2 1.08×10-2 - -
3575T 4.90×10-2 9.42×10-3 4.90×10-2 9.42×10-3 - -
4085 5.19×10-2 9.53×10-3 5.19×10-2 9.53×10-3 - -
4085T 4.09×10-2 7.97×10-3 4.09×10-2 7.97×10-3 - -
50105 4.15×10-2 7.40×10-3 4.15×10-2 7.40×10-3 - -
50105T 3.27×10-2 6.26×10-3 3.27×10-2 6.26×10-3 - -
60125 2.88×10-2 5.18×10-3 2.88×10-2 5.18×10-3 - -
  • KAR1:Equivalent factor in the MAradial direction when one LM block is used
  • KAL1:Equivalent factor in the MAreverse radial direction when one LM block is used
  • KAR2:Equivalent factor in the MAradial direction when two LM blocks are used in close contact with each other
  • KAL2:Equivalent factor in the M A reverse radial direction when two LM blocks are used in close contact with each other
  • KB1:M B Equivalent factor when one LM block is used
  • KB2:M B Equivalent factor when two LM blocks are used inclose contact with each other
  • KCR:Equivalent factor in the MCradial direction
  • KCL:Equivalent factor in the MCreverse radial direction
Table6 Equivalent Factors (Models GSR, CSR, MX, JR, NSR, SRG, SRN, and SRW)
Model number Equivalent factor in the MA radial direction when one LM block is used Equivalent factor in the MA reverse radial direction when one LM block is used Equivalent factor in the MA radial direction when two LM blocks are used in close contact with each other Equivalent factor in the MA reverse radial direction when two LM blocks are used in close contact with each other MB Equivalent factor when one LM block is used MB Equivalent factor when two LM blocks are used in close contact with each other Equivalent factor in the MC radial direction Equivalent factor in the MC reverse radial direction
KAR1 KAL1 KAR2 KAL2 KB1 KB2 KCR KCL
GSR 15T 1.61×10-1 1.44×10-1 2.88×10-2 2.59×10-2 1.68×10-1 3.01×10-2 - -
15V 2.21×10-1 1.99×10-1 3.54×10-2 3.18×10-2 2.30×10-1 3.68×10-2 - -
20T 1.28×10-1 1.16×10-1 2.34×10-2 2.10×10-2 1.34×10-1 2.44×10-2 - -
20V 1.77×10-1 1.59×10-1 2.87×10-2 2.58×10-2 1.84×10-1 2.99×10-2 - -
25T 1.07×10-1 9.63×10-2 1.97×10-2 1.77×10-2 1.12×10-1 2.06×10-2 - -
25V 1.47×10-1 1.33×10-1 2.42×10-2 2.18×10-2 1.53×10-1 2.52×10-2 - -
30T 9.17×10-2 8.26×10-2 1.68×10-2 1.51×10-2 9.59×10-2 1.76×10-2 - -
35T 8.03×10-2 7.22×10-2 1.48×10-2 1.33×10-2 8.39×10-2 1.55×10-2 - -
CSR 15 1.66×10-1 - 1.66×10-1 - -
20S 1.26×10-1 - 1.26×10-1 - -
20 9.88×10-2 - 9.88×10-2 - -
25S 1.12×10-1 - 1.12×10-1 - -
25 8.23×10-2 - 8.23×10-2 - -
30S 8.97×10-2 - 8.97×10-2 - -
30 7.05×10-2 - 7.05×10-2 - -
35 6.17×10-2 - 6.17×10-2 - -
45 5.22×10-2 - 5.22×10-2 - -
MX 5 4.27×10-1 7.01×10-2 4.27×10-1 7.01×10-2 -
7W 2.18×10-1 4.13×10-2 2.18×10-1 4.13×10-2 -
JR 25 1.12×10-1 2.02×10-2 1.12×10-1 2.02×10-2 9.96×10-2
35 7.85×10-2 1.56×10-2 7.85×10-2 1.56×10-2 6.69×10-2
45 6.73×10-2 1.21×10-2 6.73×10-2 1.21×10-2 5.20×10-2
55 5.61×10-2 1.03×10-2 5.61×10-2 1.03×10-2 4.26×10-2
NSR 20TBC 2.29×10-1 2.68×10-2 2.29×10-1 2.68×10-2 - -
25TBC 2.01×10-1 2.27×10-2 2.01×10-1 2.27×10-2 - -
30TBC 1.85×10-1 1.93×10-2 1.85×10-1 1.93×10-2 - -
40TBC 1.39×10-1 1.60×10-2 1.39×10-1 1.60×10-2 - -
50TBC 1.24×10-1 1.42×10-2 1.24×10-1 1.42×10-2 - -
70TBC 9.99×10-2 1.15×10-2 9.99×10-2 1.15×10-2 - -
SRG 15X 1.23×10-1 2.07×10-2 1.23×10-1 2.07×10-2 1.04×10-1
20X 9.60×10-2 1.71×10-2 9.60×10-2 1.71×10-2 8.00×10-2
20XL 7.21×10-2 1.42×10-2 7.21×10-2 1.42×10-2 8.00×10-2
25X 8.96×10-2 1.55×10-2 8.96×10-2 1.55×10-2 7.23×10-2
25XL 6.99×10-2 1.31×10-2 6.99×10-2 1.31×10-2 7.23×10-2
30X 8.06×10-2 1.33×10-2 8.06×10-2 1.33×10-2 5.61×10-2
30XL 6.12×10-2 1.11×10-2 6.12×10-2 1.11×10-2 5.61×10-2
35 7.14×10-2 1.18×10-2 7.14×10-2 1.18×10-2 4.98×10-2
35L 5.26×10-2 9.67×10-3 5.26×10-2 9.67×10-3 4.98×10-2
35SL 4.40×10-2 8.34×10-3 4.40×10-2 8.34×10-3 4.98×10-2
45 5.49×10-2 9.58×10-3 5.49×10-2 9.58×10-3 3.85×10-2
45L 4.18×10-2 7.93×10-3 4.18×10-2 7.93×10-3 3.85×10-2
45SL 3.28×10-2 6.56×10-3 3.28×10-2 6.56×10-3 3.85×10-2
55 4.56×10-2 8.04×10-3 4.56×10-2 8.04×10-3 3.25×10-2
55L 3.37×10-2 6.42×10-3 3.37×10-2 6.42×10-3 3.25×10-2
55SL 2.56×10-2 5.22×10-3 2.56×10-2 5.22×10-3 3.25×10-2
65 3.54×10-2 6.06×10-3 3.54×10-2 6.06×10-3 2.70×10-2
65L 2.63×10-2 4.97×10-3 2.63×10-2 4.97×10-3 2.70×10-2
65SL 1.97×10-2 4.01×10-3 1.97×10-2 4.01×10-3 2.70×10-2
85LC 2.19×10-2 4.15×10-3 2.19×10-2 4.15×10-3 1.91×10-2
100LC 1.95×10-2 3.67×10-3 1.95×10-2 3.67×10-3 1.62×10-2
SRN 35 7.14×10-2 1.18×10-2 7.14×10-2 1.18×10-2 4.98×10-2
35L 5.26×10-2 9.67×10-3 5.26×10-2 9.67×10-3 4.98×10-2
35SL 4.40×10-2 8.34×10-3 4.40×10-2 8.34×10-3 4.98×10-2
45 5.49×10-2 9.58×10-3 5.49×10-2 9.58×10-3 3.85×10-2
45L 4.18×10-2 7.93×10-3 4.18×10-2 7.93×10-3 3.85×10-2
45SL 3.28×10-2 6.56×10-3 3.28×10-2 6.56×10-3 3.85×10-2
55 4.56×10-2 8.04×10-3 4.56×10-2 8.04×10-3 3.25×10-2
55L 3.37×10-2 6.42×10-3 3.37×10-2 6.42×10-3 3.25×10-2
55SL 2.56×10-2 5.22×10-3 2.56×10-2 5.22×10-3 3.25×10-2
65 3.54×10-2 6.06×10-3 3.54×10-2 6.06×10-3 2.70×10-2
65L 2.63×10-2 4.97×10-3 2.63×10-2 4.97×10-3 2.70×10-2
65SL 1.97×10-2 4.01×10-3 1.97×10-2 4.01×10-3 2.70×10-2
SRW 70 4.18×10-2 7.93×10-3 4.18×10-2 7.93×10-3 2.52×10-2
85 3.37×10-2 6.42×10-3 3.37×10-2 6.42×10-3 2.09×10-2
100 2.63×10-2 4.97×10-3 2.63×10-2 4.97×10-3 1.77×10-2
130 2.19×10-2 4.15×10-3 2.19×10-2 4.15×10-3 1.33×10-2
150 1.95×10-2 3.67×10-3 1.95×10-2 3.67×10-3 1.15×10-2
  • KAR1:Equivalent factor in the MAradial direction when one LM block is used
  • KAL1:Equivalent factor in the MAreverse radial direction when one LM block is used
  • KAR2:Equivalent factor in the MAradial direction when two LM blocks are used in close contact with each other
  • KAL2:Equivalent factor in the M A reverse radial direction when two LM blocks are used in close contact with each other
  • KB1:M B Equivalent factor when one LM block is used
  • KB2:M B Equivalent factor when two LM blocks are used inclose contact with each other
  • KCR:Equivalent factor in the MCradial direction
  • KCL:Equivalent factor in the MCreverse radial direction

Double-axis Use

Setting Conditions

Set the conditions needed to calculate the LM system’s applied load and service life in hours.The conditions consist of the following items.

  • Mass: m (kg)
  • Direction of the working load
  • Position of the working point (e.g., center of gravity): ℓ2 ,ℓ3 ,h1(mm) (mm)
  • Thrust position: ℓ4 ,h2 (mm)
  • LM system arrangement: ℓ0 ,ℓ1(mm)(No. of units and axes)
  • Velocity diagram Speed: V (mm/s) Time constant:tn(s) Acceleration: αn(mm/s2)
  • Duty cycle Number of reciprocations per minute: N1(min-1)
  • Stroke length: ℓs(mm)
  • Average speed: Vm (m/s)
  • Required service life in hours: Lh (h) Gravitational acceleration g=9.8(m/s2)
Applied Load Equation

The load applied to the LM Guide varies with the external force, such as the position of the gravitycenter of an object, thrust position, inertia generated from acceleration/deceleration during start or stop, and cutting force.In selecting an LM Guide, it is necessary to obtain the value of the applied load while taking into account these conditions.

Calculate the load applied to the LM Guide in each of the examples 1 to 10 shown below.

m

 Mass (kg)

ℓn

 Distance (mm)

Fn

 External force (N)

Pn

 Applied load (radial/reverse radial direction) (N)

PnT

 Applied load (lateral directions) (N)

g

 Gravitational acceleration(g=9.8m/s2) (m/s2)

V

 Speed (m/s)

tn

 Time constant (s)

αn

 Acceleration (m/s2)
Example
Condition Applied Load Equation
1

Horizontal mount (with the block traveling) Uniform motion or dwell
2

Horizontal mount, overhung (with the block traveling) Uniform motion or dwell
3

Vertical mount Uniform motion or dwell
4

Wall mount Uniform motion or dwell
5

With the LM rails movable Horizontal mount
6

Laterally tilt mount
7

Longitudinally tilt mount
8

Horizontal mount with inertia
9

Vertical mount with inertia
10

Horizontal mount with external force

Note) Load is positive in the direction of the arrow.

Example of calculation

When one LM block is used

Model No.: SSR20XV1

Gravitational acceleration g=9.8 (m/s2)
Mass m=10(kg)
ℓ1=200（mm）
ℓ2=100（mm）

When two LM blocks are used in close contact with each other

Model No.: SVS25R2

Gravitational acceleration g=9.8 (m/s2)
Mass m=5(kg)
ℓ1=200（mm）
ℓ2=150（mm）

Note1) Since an LM Guide used in vertical installation receives only a moment load, there is no need to apply a load force(mg).

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