THK SHW35 Wide-Rail LM Guide Block
The THK SHW35 is a heavy-duty, wide-rail type caged-ball LM Guide (Linear Motion Guide) from the SHW series. Engineered with a low-profile, low-center-of-gravity design, it delivers exceptional rigidity, superior moment resistance (especially Mc), and 4-way equal load capacity, making it ideal for precision machinery requiring stable single-rail performance.
The THK SHW35 is a heavy-duty, wide-rail type caged-ball LM Guide (Linear Motion Guide) from the SHW series. Engineered with a low-profile, low-center-of-gravity design, it delivers exceptional rigidity, superior moment resistance (especially Mc), and 4-way equal load capacity, making it ideal for precision machinery requiring stable single-rail performance.
Official Specifications
1. LM Block Dimensions (Standard: SHW35CA / SHW35CAM)
| Parameter | Value (CA/CAM Type) |
|---|---|
| Model Number | SHW35CA (Standard Flange) / SHW35CAM (Long Flange) |
| Block Height (M) | 35 mm |
| Block Width (W) | 120 mm |
| Block Length (L) | 107 mm (CA) / 110 mm (CAM) |
| Mounting Bolt Size | M8 × 8 (4 holes) |
| Bolt Pitch (F) | 80 mm |
| Standard Seal | UU (Non-contact side seal) |
| Grease Nipple | PB117 |
| Material | High-carbon chromium bearing steel (Rail/Balls), Cast Iron (Block) |
2. Rail Specifications (SHW35 Series)
| Parameter | Value |
|---|---|
| Rail Height (H3) | 35 mm |
| Rail Width (W1) | 69 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) | 35.5 kN |
| Basic Static Load Rating (C0) | 49.2 kN |
| Static Permissible Moment (Ma) | 1.20 kN·m |
| Static Permissible Moment (Mb) | 1.20 kN·m |
| Static Permissible Moment (Mc) | 1.63 kN·m |
| Net Weight (Block only) | Approx. 0.603 kg |
Key Features (THK Official)
- Wide, Low-Profile & High Mc MomentThe wide rail and low center of gravity design provide exceptional rigidity and high resistance to overturning moment (Mc), perfect for heavy-duty, space-constrained applications.
- 4-Way Equal Load CapacityThe 45° contact angle ensures identical load ratings in radial, reverse-radial, and lateral directions, allowing universal mounting in any orientation.
- Caged Ball TechnologyIntegrated ball cages eliminate metal-to-metal friction between balls, enabling low noise, high-speed movement, and long-term maintenance-free operation.
- Self-Adjusting (Auto-Aligning) CapabilityTHK’s proprietary DF (Double Front) circular-arc groove configuration absorbs mounting surface errors while maintaining smooth, backlash-free motion under preload.
- Versatile Flange MountingThe CA/CAM flange types allow for flexible mounting from both top and bottom surfaces, adapting to various installation setups.
- High Precision & DurabilityPrecision-ground raceways and high-hardness steel ensure long service life, minimal wear, and consistent positioning accuracy under heavy loads.
Typical Applications
- General industrial machinery & automation lines
- Machine tools (milling machines, grinders)
- Large precision measuring instruments
- Semiconductor / FPD manufacturing equipment
- Robotics & heavy-duty positioning stages
- Packaging & printing machinery
