THK SSR30XW Linear Guide Block
The THK SSR30XW is a high-performance, narrow-width radial linear guide block from the SSR series, designed for top-mounted installation. It features a 4-row Gothic arch raceway with a 90° contact angle, engineered for exceptional radial load capacity and rigidity. Equipped with THK's patented ball retainer (cage) system, it eliminates ball-to-ball friction, ensuring low noise, high-speed operation, and long-term maintenance-free performance.
1. Product Overview
The THK SSR30XW is a high-performance, narrow-width radial linear guide block from the SSR series, designed for top-mounted installation. It features a 4-row Gothic arch raceway with a 90° contact angle, engineered for exceptional radial load capacity and rigidity. Equipped with THK's patented ball retainer (cage) system, it eliminates ball-to-ball friction, ensuring low noise, high-speed operation, and long-term maintenance-free performance. Its unique DF (Direct Face) self-aligning raceway design effectively absorbs mounting surface errors while maintaining superior precision and smooth motion.
2. Core Specifications (THK Official)
Basic Load Ratings
| Parameter | Value |
|---|---|
| Dynamic Load Rating (C, Radial) | 46.5 kN |
| Static Load Rating (C₀, Radial) | 52.7 kN |
| Allowable Moment Loads (Single Block) | Mx (Roll): 412 N·m, My (Pitch): 378 N·m, Mz (Yaw): 378 N·m |
| Max Rail Length | 3000 mm |
| Standard Rail Lengths | 83 – 3000 mm (50 mm increments) |
Block Dimensions (mm)
| Parameter | Value |
|---|---|
| Block Height (M) | 42 |
| Block Width (W) | 60 |
| Block Length (L) | 97 |
| Mounting Hole Thread (S x l) | M6 x 10 |
| Mounting Pitch (F) | 66 |
| Number of Mounting Holes | 4 (Top-mounted) |
| Lubrication Fitting | B-M6F |
| Weight (Block) | 1.15 kg |
Rail Specifications (mm)
| Parameter | Value |
|---|---|
| Rail Height (H) | 30 |
| Rail Width (W1) | 60 |
| Rail Mounting Hole Pitch | 80 mm (M8 tapped) |
| Rail Weight | 7.00 kg/m |
| Number of Raceways | 4 rows |
| Contact Angle | 90° (Radial) |
| Standard Preload | C0 (Clearance), C1 (Slight), C2 (Medium) |
| Operating Temperature | -15°C to 80°C |
| Standard Lubricant | THK AFB-LF Grease |
| Material | High Carbon Chromium Bearing Steel (SUJ2) |
| Accuracy Classes | Normal (standard), H (High), P (Precision) |
3. Key Features
- Narrow Width, Top-Mount Design: Compact, space-saving profile ideal for machines with limited table width.
- Superior Radial Load Performance: 4-row, 90° contact structure optimized for heavy radial loads in horizontal applications.
- Caged Ball Technology: Eliminates 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 motion.
- 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.
- Low-Profile Compactness: Low sectional height for efficient, space-saving machine designs.
4. Standard Variants
- SSR30XW: Standard narrow block, top mount, carbon steel.
- SSR30XWM: With side seals (UU) for enhanced dust/water protection.
- SSR30XW-SS: Stainless steel variant for high-corrosion environments.
- SSR30XW-GK: Equipped with solid lubricant (Germanium) for cleanroom/low-dust applications.
5. Typical Applications
- Machine Tools: CNC machining centers, vertical machining centers, grinding machines.
- Industrial Automation: Heavy-duty assembly lines, robotic transfer units, conveying systems.
- Semiconductor Manufacturing: Large inspection stages, wafer processing equipment.
- Measuring Instruments: High-precision testers, optical coordinate measuring machines.
- Heavy Machinery: Industrial presses, injection molding machines, material handling equipment.
