Full-Ball LM Guide Structural Beam Model JR
Since its LM rail has a cross-sectional shape with high flexural rigidity, this LM Guide can be used as a structural component.
Sizes : 25,35,45,55
Types
Highlight feature tags
- Flange
- Bolts mounted from above
- Bolts mounted from below
- Flange
- Bolts mounted from above
Basic load rating (kN): Basic dynamic load rating 27.6 to 121 / Basic static load rating 36.4 to 146
Sizes :
25,35,45,55
- Flange
- Bolts mounted from below
Basic load rating (kN): Basic dynamic load rating 27.6 to 121 / Basic static load rating 36.4 to 146
Sizes :
25,35,45,55
- Bolts mounted from above
Basic load rating (kN): Basic dynamic load rating 27.6 to 121 / Basic static load rating 36.4 to 146
Sizes :
25,35,45,55
Features
Structure and Features
Balls roll in four rows of raceways precision-ground on an LM rail and an LM block, and end plates incorporated in the LM block allow the balls to circulate. Since retainer plates hold the balls, they will not fall out even if the LM block is removed from the LM rail.
The Model JR uses the same LM block as the Model HSR, which has a proven track record. The LM rail has a cross-sectional shape with high flexural rigidity, and therefore can be used as a structural component.
Unlike a conventional LM Guide, whose LM rail is secured to a mounting surface with bolts when installed, Model JR’s LM rail is integrated with the mounting base while retaining the same upper structure as LM Guide Model HSR. The lower part of the LM rail has a hardness of 25HRC or less, making it easy to cut and enabling the rail to be welded.
When welding the rail, we recommend using welding rods compliant with JIS D 5816 (suggested manufacturer and model number: Kobelco LB-52).
Four-Way Equal Load
Each row of balls is placed at a contact angle of 45° so that the load ratings applied to the LM block are uniform in the four directions (radial, reverse-radial, and lateral directions), enabling the LM Guide to be used in all orientations.
Can be Mounted Even Under Rough Conditions
Since the center of the cross-section of the LM rail is slightly thinner, even if the parallelism between two rails is not precise, the LM rail is capable of absorbing the error by bending inward or outward.
Cross-Sectional Shape with High Flexural Rigidity
The LM rail has a cross-sectional shape with high flexural rigidity, and therefore can be used as a structural component in applications. In addition, even when the LM rail is partially fastened or supported in cantilever, the distortion is minimal.
Geometric Moment of Inertia of the LM Rail
|
Geometric moment I (×10 5 mm4) |
Section Z (×10 4 mm3) |
Height of H (mm) |
|||
|---|---|---|---|---|---|
|
About X axis |
About Y axis |
About X axis |
About Y axis |
||
|
JR 25 |
1.90 |
0.51 |
0.69 |
0.21 |
19.5 |
|
JR 35 |
4.26 |
1.32 |
1.43 |
0.49 |
24.3 |
|
JR 45 |
12.1 |
3.66 |
3.31 |
1.04 |
33.1 |
|
JR 55 |
27.6 |
6.54 |
5.89 |
1.40 |
43.3 |
Detailed information for each model number
Toggle chart
- Model JR-A
- Model JR-B
- Model JR-R
