Full-Ball Type LM Guide Actuator Model KR
Because of its inner block with an integrated structure consisting of a highly rigid outer rail with a U-shaped cross section, LM Guide units on both side faces, and a ball screw unit in the center, the Model KR LM Guide Actuator enables a highly rigid and highly accurate actuator in a minimal space.
In addition, since the housings A and B also serve as support units and the inner block functions as a table, this model allows significant reduction of design and assembly time, thus contributing to overall cost savings.
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
Because of its integral-structure inner block consisting of a highly rigid outer rail with a U-shaped cross section, LM Guide units on both side faces and a Ball Screw unit in the center, LM Guide Actuator model KR achieves a highly rigid and highly accurate actuator in a minimal space. In addition, since the housings A and B also serve as support units and the inner block as a table, this model allows significant reduction of man-hours required for design and assembly, thus contributing to total cost cutting.
4-way Equal Load
Each row of balls is arranged at a contact angle of 45° so that the rated load on the inner block is uniform under loads applied to the inner block 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 a moment 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 =geometrical moment of inertia around X axis
lY =geometrical moment of inertia around Y axis
High Accuracy
Since the linear guide section consists of 4rows of circular-arc grooves that enable balls to smoothly move 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 the system to follow highly accurate feed.
Space Saving
Use of a inner block integrating LM Guide units on both ends and a Ball Screw unit in the center makes model KR a highly rigid and highly accurate actuator in a minimal space.
Seal
Model KR is equipped with end seals and side seals for dust prevention as standard.
Table2 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.
