THK SVS25 Super-Heavy Load LM Guide Block
The THK SVS25 is a super-heavy duty, 4-way equal load caged-ball LM Guide (Linear Motion Guide) from the SVS series, engineered exclusively for high-performance machine tools and heavy industrial machinery. It offers exceptional rigidity, ultra-high load capacity, superior damping, and long-term maintenance-free operation, optimized for extreme precision and heavy-duty cutting environments.
The THK SVS25 is a super-heavy duty, 4-way equal load caged-ball LM Guide (Linear Motion Guide) from the SVS series, engineered exclusively for high-performance machine tools and heavy industrial machinery. It offers exceptional rigidity, ultra-high load capacity, superior damping, and long-term maintenance-free operation, optimized for extreme precision and heavy-duty cutting environments.
Official Specifications
1. Standard Block Dimensions (SVS25C / SVS25R)
| Parameter | Value (C Type) | Value (R Type) |
|---|---|---|
| Model Number | SVS25C (Flange Type) | SVS25R (Narrow, Tapped Hole) |
| Block Height (M) | 31 mm | 31 mm |
| Block Width (W) | 72 mm | 50 mm |
| Block Length (L) | 82.8 mm | 82.8 mm |
| Mounting Bolt Size | M8 (4 holes) | M6×8 (4 holes) |
| Bolt Pitch (L1) | 61.4 mm | 61.4 mm |
| Standard Seal | UU (Non-contact side seal) | UU (Non-contact side seal) |
| Grease Nipple | B-M6F | B-M6F |
| Material | High-carbon chromium bearing steel (Rail/Balls), Cast Iron (Block) | High-carbon chromium bearing steel (Rail/Balls), Cast Iron (Block) |
| Operating Temperature | -15°C to +80°C | -15°C to +80°C |
2. Rail Specifications (SVS25 Series)
| Parameter | Value |
|---|---|
| Rail Height (H3) | 25 mm |
| Rail Width (W1) | 40 mm |
| Number of Ball Rows | 4 rows (2 rows per side) |
| Contact Angle | 45° (4-way equal load) |
| Raceway Design | Deep circular-arc groove (near ball diameter curvature) |
| Precision Grade | Normal (Standard), H (High), P (Precision) |
| Preload Options | Normal (no symbol), C1 (Light), C2 (Medium) |
3. Load & Performance Ratings (SVS25 Standard Block)
| Parameter | Value |
|---|---|
| Basic Dynamic Load Rating (C) | 37.0 kN |
| Basic Static Load Rating (C0) | 52.2 kN |
| Static Permissible Moment (Ma) | 1.66 kN·m |
| Static Permissible Moment (Mb) | 1.66 kN·m |
| Static Permissible Moment (Mc) | 2.49 kN·m |
| Net Weight (Block only) | Approx. 1.8 kg |
| Rail Weight | Approx. 3.2 kg/m |
4. Long Block Dimensions (SVS25LC / SVS25LR)
| Parameter | Value (LC Type) | Value (LR Type) |
|---|---|---|
| Model Number | SVS25LC (Long Flange) | SVS25LR (Long Narrow) |
| Block Length (L) | 102 mm | 102 mm |
| Bolt Pitch (L1) | 80.6 mm | 80.6 mm |
| Dynamic Load Rating (C) | 43.7 kN | 43.7 kN |
| Static Load Rating (C0) | 66.1 kN | 66.1 kN |
| Net Weight (Block only) | Approx. 2.2 kg | Approx. 2.0 kg |
Key Features
- Super-High Rigidity & Load CapacityThe deep circular-arc raceway design increases contact area under load, delivering class-leading rigidity and ultra-high 4-way equal load capacity for heavy machining and pressing operations.
- Enhanced Damping (Vibration Resistance)The optimized ball-groove contact provides superior damping performance, reducing chatter during heavy cutting and improving surface finish quality.
- Caged Ball TechnologyIntegrated ball cages eliminate metal-to-metal friction, ensuring low noise, high-speed travel, excellent lubrication retention, and long-term maintenance-free operation.
- 4-Way Equal Load RatingThe 45° contact angle design provides identical load capacity in radial, reverse-radial, and lateral directions, offering maximum design flexibility.
- High Precision & DurabilityPrecision-ground raceways and high-hardness steel ensure minimal wear, consistent positioning accuracy, and extended service life under extreme loads.
- Superior Dust ProtectionEquipped with standard side seals and compatible with THK's LaCS (Multi-layer Contact Scraper) and other dust-proof options for excellent performance in harsh, contaminated environments.
Typical Applications
- Machine Tools (Machining centers, milling machines, grinders, boring machines)
- Heavy-duty industrial machinery & press machines
- Precision measuring instruments
- Large robotic arms & positioning systems
- Die-casting & injection molding machines
- Woodworking machinery
