Rolled Rotary Ball Screw
The rotary ball screw is a rotary-nut ball screw unit that has an integrated structure consisting of a ball screw nut and a support bearing. The support bearing is an angular bearing that has a contact angle of 60°, contains an increased number of balls, and achieves great axial rigidity.
The Model BLR is divided into two types: the precision ball screw and the rolled ball screw.
![](https://www.thk.com/jp/assets/images/products/ball_screw_transport_rotary-nut.png)
Types
Highlight feature tags
- Large lead
- No preload
- End-cap type
- Rotary nut
- Transport (ball screw)
![](https://www.thk.com/jp/assets/images/products/transport_rotary-nut_transport_blr.png)
- Transport (ball screw)
- Large lead
- No preload
- End-cap type
- Rotary nut
Screwshaftdiameter(mm) : 16,20,25,32,36,40,50
Features
Structure and Features
![](https://www.thk.com/jp/assets/images/products/ball_screw_spline_transport_rotary-nut_en_img_02.jpg)
The rotary ball screw is a rotary-nut ball screw unit that has an integrated structure consisting of a ball screw nut and a support bearing. The support bearing is an angular bearing that has a contact angle of 60°, contains an increased number of balls, and achieves great axial rigidity. Model BLR is divided into two types: the Precision Ball Screw and the Rolled Screw Ball.
Smooth Motion
It achieves smoother motion than rack-and-pinion based straight motion.
Low Noise Even in High-Speed Rotation
Model BLR produces very low noise when the balls are picked up along the end cap. In addition, the balls circulate by passing through the ball screw nut, allowing this model to be used at high speed.
High Rigidity
The support bearing of this model is larger than that of the screw shaft rotation type. Thus, its axial rigidity is significantly increased.
Compact
Since the nut and the support bearing are integrated, a highly accurate and compact design is achieved.
Easy Installation
By simply mounting this model to the housing with bolts, a ball screw nut rotating mechanism can be obtained. (For the housing’s inner-diameter tolerance, H7 is recommended.)