THK HRW17 Wide-Rail LM Guide Block
The THK HRW17 is a compact, wide-rail type linear motion (LM) guide from THK's HRW series. It features a low-profile, low-center-of-gravity design, 4-way equal load capacity, and high rigidity, making it ideal for space-saving, single-axis precision applications requiring excellent moment resistance.
The THK HRW17 is a compact, wide-rail type linear motion (LM) guide from THK's HRW series. It features a low-profile, low-center-of-gravity design, 4-way equal load capacity, and high rigidity, making it ideal for space-saving, single-axis precision applications requiring excellent moment resistance.
Official Specifications
1. LM Block Dimensions (Standard: HRW17CA / HRW17CAM)
| Parameter | Value (CA/CAM Type) |
|---|---|
| Model Number | HRW17CA (Standard Flange) / HRW17CAM (Long Flange) |
| Block Height (M) | 17 mm |
| Block Width (W) | 60 mm |
| Block Length (L) | 50.8 mm (CA) / 53 mm (CAM) |
| Mounting Bolt Size | M4 × 5 (4 holes) |
| Bolt Pitch (F) | 33.6 mm |
| Standard Seal | UU (Non-contact side seal) |
| Grease Nipple | PB107 |
| Material | High-carbon chromium bearing steel (Rail/Balls), Cast Iron (Block) |
2. Rail Specifications (HRW17 Series)
| Parameter | Value |
|---|---|
| Rail Height (H3) | 17 mm |
| Rail Width (W1) | 26 mm |
| Number of Ball Rows | 4 rows (2 rows per side) |
| Contact Angle | 45° (4-way equal load) |
| Precision Grade | Normal (Standard) |
| Operating Temperature | -15°C to +80°C |
3. Load & Performance Ratings
| Parameter | Value |
|---|---|
| Basic Dynamic Load Rating (C) | 5.5 kN |
| Basic Static Load Rating (C0) | 9.1 kN |
| Static Permissible Moment (Ma) | 0.12 kN·m |
| Static Permissible Moment (Mb) | 0.12 kN·m |
| Static Permissible Moment (Mc) | 0.21 kN·m |
| Net Weight (Block only) | Approx. 0.25 kg |
Key Features
- Wide, Low-Profile & Low Center of GravityThe wide rail and low overall height design provide exceptional rigidity and high resistance to overturning moment (Mc), perfect for compact, space-constrained setups.
- 4-Way Equal Load CapacityThe 45° contact angle delivers identical load ratings in radial, reverse-radial, and lateral directions, enabling universal mounting in any orientation.
- High Rigidity & Single-Axis StabilityThe wide rail cross-section offers high rigidity, allowing stable performance with a single rail without needing additional side supports.
- Ball Retention SystemIntegrated retainer plates securely hold balls, preventing them from falling out when the block is removed from the rail.
- Self-Adjusting (Auto-Aligning) CapabilityTHK’s proprietary DF circular-arc groove configuration absorbs mounting surface errors while maintaining smooth, backlash-free motion.
- Versatile Mounting (CA/CAM Types)The flange design allows for mounting from both top and bottom surfaces, offering great installation flexibility.
Typical Applications
- Precision measuring instruments
- Semiconductor manufacturing equipment
- Flat panel display (FPD) production machinery
- Optical alignment systems
- Compact automation modules
- Medical diagnostic devices
- Robotics and precision positioning stages
