NSK Linear Guide NH20BN
The NSK NH20BN is a high-performance, standard-profile linear guide featuring a long-type square slide block designed for moderate-to-heavy load applications. Utilizing NSK's advanced tribology and optimized ball circulation technology, it delivers 1.3 times the dynamic load rating and twice the service life compared to the conventional LH Series. It maintains full mounting interchangeability with LH/LS models, allowing direct replacement without design modifications.
1. Product Overview
The NSK NH20BN is a high-performance, standard-profile linear guide featuring a long-type square slide block designed for moderate-to-heavy load applications. Utilizing NSK’s advanced tribology and optimized ball circulation technology, it delivers 1.3 times the dynamic load rating and twice the service life compared to the conventional LH Series. It maintains full mounting interchangeability with LH/LS models, allowing direct replacement without design modifications.
2. Key Dimensions (mm, Official)
| Parameter | Value |
|---|---|
| Slide Block Length (L) | 91.8 |
| Slide Block Width (W) | 44 |
| Assembly Height (H) | 30 |
| Rail Width (W1) | 20 |
| Rail Height (H1) | 18 |
| Slide Mounting Holes | M5×0.8×6 |
| Rail Mounting Hole Pitch | 60 |
| Approx. Slide Weight | 0.48 kg (Single Slide) |
3. Load Ratings (N, Official)
| Rating Type | Value |
|---|---|
| Basic Dynamic Load Rating (C) | 24,000 |
| Basic Static Load Rating (C₀) | 50,500 |
| Basic Static Moment (My) | 166 N·m |
| Basic Static Moment (Mz) | 166 N·m |
4. Performance Specifications (Official)
- Preload Options:
- ZT (Z0): Fine Clearance (0–3 µm)
- ZZ (Z1): Slight Preload (Standard)
- ZH (Z3): Medium Preload (High Rigidity)
- Max. Allowable Speed: 150 m/min (2.5 m/s)
- Operating Temperature: -10°C to +80°C (K1-L unit: max 50°C, transient 80°C)
- Accuracy Grades: PN (Normal), P6, P5, P4, P3
- Material: Special High-Carbon Steel (Standard); Stainless Steel (Optional, SUS)
- Standard Protection: Dual End Seals + Side Seals
- Lubrication: Compatible with NSK K1-L™ Maintenance-Free Lubrication Unit
5. Core Features & Benefits (Official)
- Superior Longevity: Optimized ball groove geometry doubles lifespan vs. LH SeriesNSK.
- Four-Way Equal Load: 50° contact angle provides equal rigidity in radial, reverse-radial, and lateral directions.
- High Rigidity & Stability: Long block (BN) design enhances moment rigidity for precision applications.
- Self-Aligning Capability: DF (Double-Face) contact absorbs mounting surface errors.
- Full Interchangeability: Direct replacement for LH/LS Series; no design changes required.
- Low Noise & Smooth Motion: Refined ball recirculation path reduces vibration and noise.
- Maintenance-Free Option: K1-L lubrication unit extends service intervals significantly.
6. Typical Applications
Ideal for semi-conductor manufacturing equipment, automation lines, precision measuring instruments, printing machines, woodworking machinery, and general industrial machinery requiring high precision, rigidity, and long life.
