IKO BWU2575 High Rigidity Precision Linear Slide Unit
Two‑row steel balls with four‑point contact (45° contact angle), integrated ball retainer, no built‑in seals, all‑stainless‑steel components for corrosion resistance.
Model: IKO BWU2575 (also designated BWU25‑75)Series: BWU High Rigidity Precision Linear Slide Unit (limited‑stroke, integrated table‑bed, stainless‑steel construction)Core Structure: Two‑row steel balls with four‑point contact (45° contact angle), integrated ball retainer, no built‑in seals, all‑stainless‑steel components for corrosion resistance.Source: IKO Nippon Thompson Official Catalog CAT‑1561E (Linear Motion Rolling Guide – Ball Slide Unit BWU Series).
Official Specifications (mm / N / N·m / g, from IKO Global Catalog)
Basic Dimensions & Weight
- Unit Mass (Ref.): 104 g
- Nominal Width (W): 25 mm
- Overall Height (H): 9 mm
- Table Height (H1): 5.5 mm
- Bed Height (N): 1.8 mm
- Overall Length (L): 75 mm
- Maximum Stroke Length: 48 mm
- Table Mounting Dimensions:
- W1: 10 mm
- L1: 55 mm
- L2: 25 mm
- L3: 37.5 mm
- Mounting Screw (M): M3
- Max Fixing Thread Depth: 2.5 mm
- d: 6.5 mm, t: 0.9 mm
- Bed Mounting Dimensions:
- W3: 14 mm
- H2: 5.2 mm
- P: 30 mm
- d1: 3.5 mm, d2: 6 mm, h: 3.2 mm
Load Ratings (Official Values)
- Basic Dynamic Load Rating (C): 1,760 N
- Basic Static Load Rating (C₀): 3,020 N
- Allowable Load: 1,010 N
- Static Moment Rating (T₀): 22.5 N·m
Key Performance Parameters
- Contact Structure: Two‑row, four‑point contact (45°) steel balls, supports radial, reverse‑radial, lateral loads in all directions
- Preload: Factory‑set standard preload
- Operating Temperature: -10°C to +100°C (continuous operation up to 100°C)
- Maximum Speed: ≤ 30 m/min
- Material: All steel parts = Stainless steel (SUJ2/SUS440C) for high corrosion resistance
- Sealing: No built‑in dust seals; external protective cover recommended for non‑clean environments
- Lubrication: No pre‑packed grease; apply lithium‑soap base grease directly to raceways before use
- Accuracy: High precision, simultaneous grinding of two‑row raceways for minimal error
Key Official Features
- Compact & Integrated Design: U‑shaped precision‑formed stainless steel integrates rail and mounting surface, lightweight and space‑saving for miniature precision equipment.
- High Rigidity & Multi‑Directional Load Capacity: Four‑point contact ball arrangement delivers stable rigidity and load performance under fluctuating/combined loads.
- Smooth & Quiet Motion: Precision‑ground raceways + ball retainer eliminate ball collision, ensure low‑friction, stick‑slip‑free, quiet linear movement with high micro‑feed positioning accuracy.
- Excellent Corrosion Resistance: Full stainless‑steel construction, ideal for cleanroom, semiconductor, medical and anti‑rust‑required applications.
- High Safety: Non‑combustible/self‑extinguishing resin components, suitable for OA/household equipment requiring flame resistance.
Typical Applications
Semiconductor manufacturing/inspection equipment, precision measuring instruments, medical devices, cleanroom automation, optical equipment, miniature positioning stages, and high‑precision limited‑stroke linear motion systems.
