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.
Size : 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
Size :
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
Size :
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
Size :
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 endplates incorporated in the LM block allow the balls to circulate. Since retainer plates hold the balls, they do not fall off even if the LM rail is pulled out.
Model JR uses the same LM block as model HSR, which has a proven track record and is highly reliable. The LM rail has a sectional shape with high flexural rigidity, and therefore can be used as a structural member.
Unlike the conventional LM Guide type, whose LM rail was secured onto the base with bolts when installed, model JR’s LM rail is integrated with the mounting base, and the top of the LM rail has the same 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 the rail 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).
4-way Equal Load
Each row of balls is placed at a contact angle of 45° so that the rated loads 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 accurate the LM rail is capable of absorbing the error by bending inward or outward.
Sectional Shape with High Flexural Rigidity
Since the LM rail has a sectional shape with high flexural rigidity, it can also be used as a structural member. In addition, even when the LM rail is partially fastened or supported in cantilever, the distortion is minimal.
Second Moment of Inertia of the LM Rail
|
|
Geometrical moment I [×10 5 mm4 ] |
Modulus of Z [×10 4 mm3 ] |
Height of H[mm] |
||
|---|---|---|---|---|---|
|
AboutX axis |
AboutY axis |
AboutX axis |
AboutY 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
Dimensional drawing/Dimensional table
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Member-Exclusive Content
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Easy product comparisonsHighlight feature -
Save items for laterreview Favorites feature
Benefit 2: Exclusive content
| Products | Contents |
|---|---|
| LM Guide | LM rail standard lengths and maximum length, tapped-hole type LM rail, frame for LM rail clamps, steel plate for LM rail clamps, etc. |
| Ball Screw | Axial clearance, maximum manufacturing length of shaft, etc. |
| Actuator | Movable part mass, etc. |
Standard Lengths and Maximum Lengths of LM Rails
THK Online Services
Member-Exclusive Content
These contents can be accessed
after registering as a member.
Benefit 1: Useful features
-
Easy product comparisonsHighlight feature
-
Save items for laterreview Favorites feature
Benefit 2: Exclusive content
| Products | Contents |
|---|---|
| LM Guide | LM rail standard lengths and maximum length, tapped-hole type LM rail, frame for LM rail clamps, steel plate for LM rail clamps, etc. |
| Ball Screw | Axial clearance, maximum manufacturing length of shaft, etc. |
| Actuator | Movable part mass, etc. |
Model JB frame for LM rail clamps
THK Online Services
Member-Exclusive Content
These contents can be accessed
after registering as a member.
Benefit 1: Useful features
-
Easy product comparisonsHighlight feature
-
Save items for laterreview Favorites feature
Benefit 2: Exclusive content
| Products | Contents |
|---|---|
| LM Guide | LM rail standard lengths and maximum length, tapped-hole type LM rail, frame for LM rail clamps, steel plate for LM rail clamps, etc. |
| Ball Screw | Axial clearance, maximum manufacturing length of shaft, etc. |
| Actuator | Movable part mass, etc. |
Model JT steel plate for LM rail clamps
THK Online Services
Member-Exclusive Content
These contents can be accessed
after registering as a member.
Benefit 1: Useful features
-
Easy product comparisonsHighlight feature
-
Save items for laterreview Favorites feature
Benefit 2: Exclusive content
| Products | Contents |
|---|---|
| LM Guide | LM rail standard lengths and maximum length, tapped-hole type LM rail, frame for LM rail clamps, steel plate for LM rail clamps, etc. |
| Ball Screw | Axial clearance, maximum manufacturing length of shaft, etc. |
| Actuator | Movable part mass, etc. |
