Full-Ball Type LM Guide Actuator Model KR
LM Guide Actuator Model KR achieves high rigidity and high accuracy in minimal space thanks to the highly rigid U-shaped cross section of its outer rail and its inner block that features LM Guide units on both side faces and an integrated ball screw unit in the center. In addition, since housings A and B also serve as support units and the inner block serves as a table, this model allows for a significant reduction in labor hours required for design and assembly, thus contributing to an overall lower cost.
Types
Highlight feature tags
- High rigidity
- High accuracy
- 4-way equal load
- Space saving
- High rigidity
- High accuracy
- Space saving
- 4-way equal load
- High rigidity
- High accuracy
- Space saving
- 4-way equal load
- High rigidity
- High accuracy
- Space saving
- 4-way equal load
- High rigidity
- High accuracy
- Space saving
- 4-way equal load
- High rigidity
- High accuracy
- Space saving
- 4-way equal load
- High rigidity
- High accuracy
- Space saving
- 4-way equal load
- High rigidity
- High accuracy
- Space saving
- 4-way equal load
- High rigidity
- High accuracy
- Space saving
- 4-way equal load
- High rigidity
- High accuracy
- Space saving
- 4-way equal load
Features
Structure and Features
LM Guide Actuator Model KR achieves high rigidity and high accuracy in minimal space thanks to the highly rigid U-shaped cross section of its outer rail and its inner block that features LM Guide units on both side faces and an integrated ball screw unit in the center. In addition, since housings A and B also serve as support units and the inner block serves as a table, this model allows for a significant reduction in labor hours required for design and assembly, thus contributing to an overall lower cost.
Four-Way Equal Load
Each row of balls is arranged at a contact angle of 45° so that the load rating on the inner block is uniform in the four directions (radial, reverse-radial, and lateral directions). As a result, Model KR can be used in any mounting orientation.
High Rigidity
Use of an outer rail with a U-shaped cross section increases the rigidity against moments and torsion.
|
Model No. |
IX (mm4) |
IY (mm4) |
Mass (kg/m) |
|---|---|---|---|
|
KR15 |
9.08 × 102 |
1.42 × 104 |
1.04 |
|
KR20 |
6.1 × 103 |
6.2 × 104 |
2.6 |
|
KR26 |
1.7 × 104 |
1.5 × 105 |
3.9 |
|
KR30H |
2.7 × 104 |
2.8 × 105 |
5.0 |
|
KR33 |
6.2 × 104 |
3.8 × 105 |
6.6 |
|
KR45H |
8.4 × 104 |
8.9 × 105 |
9.0 |
|
KR46 |
2.4 × 105 |
1.5 × 106 |
12.6 |
|
KR55 |
2.2 × 105 |
2.3 × 106 |
15.0 |
|
KR65 |
4.6 × 105 |
5.9 × 106 |
23.1 |
lX = geometric moment of inertia around X axis
lY = geometric moment of inertia around Y axis
High Accuracy
Since the linear guide consists of four rows of circular-arc grooves that enable balls to smoothly move with two points of contact even under a preload, a highly rigid guide with no clearance is achieved. Additionally, variation in frictional resistance caused by load fluctuation is minimized, allowing highly accurate feeding. The system contributes significantly to increasing precision and quality by providing precision-grade positioning performance to all kinds of machines.
Space Saving
These highly rigid, highly accurate actuators take up minimal space thanks to an integrated structure that incorporates LM Guide units on both sides of an inner block with a ball screw in the center.
Seal
Model KR is equipped with end seals and side seals for contamination protection as standard.
Table 2 shows the rolling resistance and seal resistance per inner block (guide section).
|
Model No. |
Rolling resistance value |
Seal resistance value |
Total |
|---|---|---|---|
|
KR15 |
0.2 |
0.7 |
0.9 |
|
KR20 |
0.5 |
0.7 |
1.2 |
|
KR26 |
0.6 |
0.8 |
1.4 |
|
KR30H |
1.5 |
2.0 |
3.5 |
|
KR33 |
1.5 |
1.9 |
3.4 |
|
KR45H |
2.5 |
2.6 |
5.1 |
|
KR46 |
2.5 |
2.5 |
5 |
|
KR55 |
5.0 |
3.8 |
8.8 |
|
KR65 |
6.0 |
4.1 |
10.1 |
Note: The rolling resistance represents the value when a lubricant is not used.
