NSK LS20JM Linear Guide
The NSK LS20JM is a compact, flange-type linear motion guide from NSK's LS series. Engineered for space-saving installations, it features a 4-row Gothic arch groove design with optimized ball circulation, delivering stable radial, reverse-radial, and lateral load capacity with moderate rigidity. The JM-type flange slider offers side-mounted mounting holes for versatile assembly, ideal for compact automation and general industrial machinery requiring reliable precision and smooth motion.
Product Overview
The NSK LS20JM is a compact, flange-type linear motion guide from NSK’s LS series. Engineered for space-saving installations, it features a 4-row Gothic arch groove design with optimized ball circulation, delivering stable radial, reverse-radial, and lateral load capacity with moderate rigidity. The JM-type flange slider offers side-mounted mounting holes for versatile assembly, ideal for compact automation and general industrial machinery requiring reliable precision and smooth motion.
Core Official Features
- 4-Row Gothic Arch Grooves: 4-point contact structure provides equal load capacity in four directions (radial, reverse-radial, lateral) and stable resistance to moment loads.
- Optimized Contact Angle: Balances rigidity and compactness for moderate-load, high-precision applications.
- Smooth & Quiet Motion: Precision-engineered ball recirculation minimizes friction, vibration, and noise for stable operation.
- Self-Aligning Design: Absorbs minor installation surface errors, ensuring consistent accuracy and smooth movement.
- K1™ Maintenance-Free Lubrication: Compatible with NSK K1 lubrication units for long-term, low-maintenance performance.
- Interchangeable Dimensions: Conforms to global dimensional standards for easy replacement and cross-system integration.
- Wide Option Range: Available in multiple accuracy and preload grades to suit diverse application requirements.
Official Dimensional Specifications (mm, NSK Official Data)
| Parameter | Value |
|---|---|
| Slider Height (H) | 28 |
| Slider Width (W) | 59 |
| Slider Length (L) | 65.2 |
| Rail Width (W1) | 20 |
| Rail Height (H1) | 15.5 |
| Slider Mounting Hole | M6×1×9 |
| Rail Mounting Hole Pitch | 60 |
| Rail Mounting Hole | φ6×9.5×8.5 |
| Grease Nipple | PT1/8 |
Official Performance Parameters (NSK Official Data)
| Parameter | Value |
|---|---|
| Basic Dynamic Load Rating (C) | 8.4 kN |
| Basic Static Load Rating (C0) | 13.4 kN |
| Static Permissible Moment (MR) | 0.26 kN·m |
| Static Permissible Moment (MP) | 0.26 kN·m |
| Static Permissible Moment (MY) | 0.48 kN·m |
| Mass of Slider | 0.33 kg |
| Mass of Rail | 0.82 kg/m |
| Standard Rail Length | Up to 3960 mm |
Standard Specifications
- Accuracy Grades: Normal (PN), High (PH), Precision (SP), Super Precision (UP)
- Preload Grades: Z0 (Clearance), Z1 (Light Preload), Z3 (Medium Preload)
- Material: High-carbon chromium bearing steel (standard)
- Seals: Standard double seals (UU), optional low-dust seals (SS)
- Lubrication: Standard grease lubrication; K1™ maintenance-free unit optional
- Surface Treatment: Black oxide finish (standard)
Typical Applications
- Compact automated machinery
- Semiconductor manufacturing equipment
- Precision measuring instruments
- Packaging machinery
- Medical devices
- Assembly lines & handling systems
- General industrial machinery
