THK LMH8LUU Linear Bushing (Long Type, Oval Cut Flange)
THK LMH8LUU is a long‑type, oval‑cut flange linear bushing with double‑lip seals (UU), designed for smooth linear motion with enhanced moment load capacity. It features a compact oval flange for lower center height and direct bolt‑on mounting, ideal for space‑constrained light‑to‑medium load systems.
THK LMH8LUU is a long‑type, oval‑cut flange linear bushing with double‑lip seals (UU), designed for smooth linear motion with enhanced moment load capacity. It features a compact oval flange for lower center height and direct bolt‑on mounting, ideal for space‑constrained light‑to‑medium load systems.
Official Specifications
| Parameter | Value |
|---|---|
| Inscribed Bore Diameter (dr) | 8 mm (0 to −0.010 mm) |
| Outer Diameter (D) | 15 mm |
| Overall Length (L) | 45 mm |
| Flange Diameter (D₁) | 32 mm |
| Flange Width (K) | 21 mm |
| Mounting Hole (d₁×d₂×h) | 3.4 mm × 6.5 mm × 3.3 mm |
| Ball Rows | 4 rows |
| Basic Dynamic Load Rating (C) | 431 N |
| Basic Static Load Rating (C₀) | 784 N |
| Permissible Static Moment (Mo) | 4.31 N·m |
| Mass | 33 g |
| Retainer Material | Synthetic resin |
| Seal Type | UU (double‑lip seals, both ends) |
| Outer Cylinder Material | Bearing steel (SUJ2) |
| Lubrication | Pre‑lubricated with anti‑rust oil |
| Operating Temperature | −15 °C to 80 °C |
| Accuracy Grade | Normal grade |
Key Features
- Oval‑cut flange for lower center height vs. square‑flange types, enabling compact designs.
- Long‑type construction (double retainer) for superior moment load resistance.
- UU double‑lip seals for effective dust and contamination protection.
- Synthetic resin retainer ensures quiet, low‑friction linear movement.
- Optimized ball row alignment: two rows support loads from the flattened flange side for extended service life.
- Compatible with hardened precision shafts (recommended hardness ≥58 HRC).
Applications
Suitable for automation equipment, measuring instruments, office machinery, packaging machinery, 3D printers, and light‑duty linear motion systems requiring compact, high‑rigidity guidance with moment load capability.
