THK SSR25XV Linear Guide Block
The THK SSR25XV is a space-saving, short-type radial linear guide block from the SSR series, sharing the same cross-sectional geometry as the standard XW model but with a reduced overall length. It features a 4-row Gothic arch raceway with a 90° contact angle, optimized for exceptional radial load capacityTHK. Equipped with THK's ball retainer (cage) system, it eliminates ball-to-ball friction, ensuring low noise, high-speed operation, and long-term maintenance-free performance.
Series: SSR (Radial Type, Caged Ball LM Guide)Model: SSR25XV (Standard Block, Short-type, Top Mount)
1. Product Overview
The THK SSR25XV is a space-saving, short-type radial linear guide block from the SSR series, sharing the same cross-sectional geometry as the standard XW model but with a reduced overall length. It features a 4-row Gothic arch raceway with a 90° contact angle, optimized for exceptional radial load capacity. Equipped with THK's ball retainer (cage) system, it eliminates ball-to-ball friction, ensuring low noise, high-speed operation, and long-term maintenance-free performance. The DF (Direct Face) self-aligning raceway design effectively absorbs mounting surface errors while maintaining high precision and rigidity.
2. Core Specifications
Basic Load Ratings
| Parameter | Value |
|---|---|
| Dynamic Load Rating (C, Radial) | 21.7 kN |
| Static Load Rating (C₀, Radial) | 22.5 kN |
| Allowable Moment Loads (Single Block) | Mx (Roll): 138 N·m, My (Pitch): 126 N·m, Mz (Yaw): 126 N·m |
| Max Rail Length | 3000 mm |
| Standard Rail Lengths | 73 – 3000 mm (50 mm increments) |
Block Dimensions (mm)
| Parameter | Value |
|---|---|
| Block Height (M) | 33 |
| Block Width (W) | 48 |
| Block Length (L) | 60 |
| Mounting Hole Thread (S x l) | M6 x 9 |
| Mounting Pitch (F) | 40 |
| Number of Mounting Holes | 2 (Top-mounted) |
| Lubrication Fitting | B-M6F (M6) |
| Weight (Block) | 0.620 kg |
Rail Specifications (mm)
| Parameter | Value |
|---|---|
| Rail Height (H) | 26 |
| Rail Width (W1) | 48 |
| Rail Mounting Hole Pitch | 60 mm (M6 tapped) |
| Rail Weight | 4.60 kg/m |
| Number of Raceways | 4 rows |
| Contact Angle | 90° (Radial) |
| Standard Preload | C0 (Clearance), C1 (Slight), C2 (Medium) |
| Operating Temperature | -10°C to 80°C |
| Standard Lubricant | THK AFG Grease |
| Material | High Carbon Chromium Bearing Steel (SUJ2) |
| Accuracy Classes | Normal (standard), H (High), P (Precision) |
3. Key Features
- Space-Saving Short Block: Shorter 60mm length vs. standard XW model, ideal for compact, weight-sensitive designs.
- High Radial Load Performance: 4-row, 90° contact structure engineered for heavy radial loads in horizontal applications.
- Caged Ball Technology: Prevents steel ball collision, reduces noise & heat, improves grease retention, enabling high speeds & long life.
- Self-Alignment (DF Design): Unique circular-arc grooves compensate for installation errors, ensuring smooth, accurate motionTHK.
- High Rigidity & Precision: Minimized deflection under load for stable, ultra-precise linear movement.
- Maintenance-Free: Sealed construction with long-life lubrication for extended service intervals.
- Top-Mount Design: Easy installation from above with 2 mounting bolts for versatile machine integration.
4. Standard Variants
- SSR25XV: Standard short block, top mount, carbon steel.
- SSR25XVM: With side seals (UU) for enhanced dust/water protection.
- SSR25XV-SS: Stainless steel variant for high-corrosion environments.
- SSR25XV-GK: Equipped with solid lubricant (Germanium) for cleanroom/low-dust applications.
5. Typical Applications
- Semiconductor Manufacturing: Die bonders, wire bonders, inspection stages.
- Automation & Robotics: Pick-and-place units, high-speed actuators, assembly lines.
- Precision Machinery: Measuring instruments, electronic component assembly.
- Medical Equipment: Small-scale surgical robots, diagnostic devices.
- Printing & Packaging: High-speed printers, labeling machines.
