NSK LS25EM Linear Guide
The NSK LS25EM is a medium-sized, square-type linear motion guide from NSK's LS series. Designed for space-saving, medium-load applications, it features a 4-row Gothic arch groove design with a 50° contact angle, delivering high rigidity, multi-directional load capacity, and stable precision. The EM-type square slider is equipped with top-mounted tapped holes, offering a low-profile, space-efficient assembly ideal for precision machinery, semiconductor equipment, and automated systems.
Product Overview
The NSK LS25EM is a medium-sized, square-type linear motion guide from NSK’s LS series. Designed for space-saving, medium-load applications, it features a 4-row Gothic arch groove design with a 50° contact angle, delivering high rigidity, multi-directional load capacity, and stable precision. The EM-type square slider is equipped with top-mounted tapped holes, offering a low-profile, space-efficient assembly ideal for precision machinery, semiconductor equipment, and automated systems.
Core Official Features
- 4-Row Gothic Arch Grooves: 4-point contact structure provides equal load capacity in radial, reverse-radial, and lateral directions, with excellent moment load resistance.
- 50° Optimized Contact Angle: Balances high rigidity and load capacity for compact, precision applications.
- Self-Aligning Capability: Absorbs minor installation surface errors, ensuring consistent accuracy and smooth movement.
- Smooth & Quiet Operation: Precision ball circulation minimizes friction, vibration, and noise.
- K1™ Maintenance-Free Lubrication: Compatible with NSK K1 lubrication units for long-term, low-maintenance operation.
- Interchangeable Dimensions: Conforms to global dimensional standards for easy replacement and cross-system integration.
- Wide Option Range: Offered in multiple accuracy and preload grades to meet diverse requirements.
Official Dimensional Specifications (mm, NSK Official Data)
| Parameter | Value |
|---|---|
| Slider Height (H) | 33 |
| Slider Width (W) | 59.6 |
| Slider Length (L) | 81.6 |
| Rail Width (W1) | 23 |
| Rail Height (H1) | 22 |
| Slider Mounting Hole | M6 × 1 × 9 |
| Rail Mounting Hole Pitch | 60 |
| Rail Mounting Hole | φ7 × 11 |
| Grease Nipple | PT1/8 |
Official Performance Parameters (NSK Official Data)
| Parameter | Value |
|---|---|
| Basic Dynamic Load Rating (C) | 18.1 kN |
| Basic Static Load Rating (C0) | 33.3 kN |
| Static Permissible Moment (MR) | 0.58 kN·m |
| Static Permissible Moment (MP) | 0.58 kN·m |
| Static Permissible Moment (MY) | 0.98 kN·m |
| Mass of Slider | 0.82 kg |
| Mass of Rail | 4.9 kg/m |
| Standard Rail Length | Up to 3000 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); stainless steel optional
- Seals: Standard double seals (UU); optional low-dust seals (SS)
- Lubrication: Standard grease lubrication; K1™ maintenance-free unit available
- Surface Treatment: Black oxide finish (standard); fluoride hard chrome plating optional
Typical Applications
- Precision measuring instruments
- Semiconductor manufacturing equipment
- Automated assembly & handling systems
- Medical devices
- Packaging machinery
- Office automation equipment
- Small to medium-sized machine tools
