THK HCR25A+60/500R Curved LM Guide
The THK HCR25A+60/500R is a high-precision curved (arc) linear motion guide from THK's HCR R-Guide series. It is engineered for backlash-free, smooth circular/arc motion, featuring a 4-way equal load structure and a flanged block with tapped holesTHK. This assembly consists of one HCR25A flanged LM block paired with a 60° arc radius, 500mm nominal length curved rail.
The THK HCR25A+60/500R is a high-precision curved (arc) linear motion guide from THK's HCR R-Guide series. It is engineered for backlash-free, smooth circular/arc motion, featuring a 4-way equal load structure and a flanged block with tapped holes. This assembly consists of one HCR25A flanged LM block paired with a 60° arc radius, 500mm nominal length curved rail.
Official Specifications
LM Block (HCR25A) Dimensions
| Parameter | Value |
|---|---|
| Model Number | HCR25A |
| Block Height (M) | 36 mm |
| Block Width (W) | 70 mm |
| Block Length (L) | 82.3 mm |
| Mounting Bolt Size | M8 (4 holes) |
| Grease Nipple | B-M6F |
| Material | High-carbon chromium bearing steel (Rail/Balls), Cast Iron (Block) |
Rail (60/500R) Specifications
| Parameter | Value |
|---|---|
| Rail Type | Curved (Arc) |
| Arc Angle | 60° |
| Nominal Rail Length | 500 mm |
| Rail Height (H3) | 25 mm |
| Number of Ball Rows | 4 rows (2 rows per side) |
| Precision Grade | Standard (Normal Grade) |
| Operating Temperature | -15°C to +80°C |
Load Ratings (4-Way Equal Capacity)
| Parameter | Value |
|---|---|
| Basic Dynamic Load Rating (C) | 19.6 kN |
| Basic Static Load Rating (C0) | 29.4 kN |
| Static Permissible Moment (Ma) | 0.86 kN·m |
| Static Permissible Moment (Mb) | 0.64 kN·m |
| Net Weight (Assembly) | Approx. 3.7 kg |
Key Features (from THK Official)
- High-Precision Arc MotionDelivers backlash-free, ultra-smooth circular movement via 4 rows of precision-ground balls circulating between the curved rail and block. Superior accuracy compared to slide guides or cam followers.
- 4-Way Equal Load CapacityUnique design withstands radial, reverse-radial, and lateral loads equally, making it ideal for complex, multi-directional force applications.
- Flanged Block with Tapped HolesThe standard HCR25A block features a flange with mounting holes for straightforward, secure installation from above.
- Design FlexibilityMultiple blocks can move independently on a single rail. Supports large-scale circular motion (over 5m), which is unachievable with standard swivel bearings.
- Easy Assembly & MaintenanceSimple bolt-on installation. Equipped with standard grease nipples for easy lubrication, ensuring long service life in industrial environments.
Typical Applications
- Rotary tables & indexers
- Medical equipment (CT scanners, X-ray machines)
- Optical measuring instruments
- Tool changers & robotic swivel units
- Pendulum systems & amusement rides
- Industrial automation & rotary stages
