THK LM20GA Linear Bush
The THK LM20GA is a standard-type, flangeless linear ball bushing (linear bearing) from THK's LM-GA series, featuring a metal retainer construction. Engineered for smooth, low-friction linear motion, it is designed to work in conjunction with a 20mm diameter precision shaft.
The THK LM20GA is a standard-type, flangeless linear ball bushing (linear bearing) from THK's LM-GA series, featuring a metal retainer construction. Engineered for smooth, low-friction linear motion, it is designed to work in conjunction with a 20mm diameter precision shaft.Official Specifications
| Parameter | Value |
|---|---|
| Model Number | LM20GA |
| Type | Linear Ball Bushing (Flangeless, Standard Type) |
| Shaft Diameter (dr) | 20 mm |
| Outer Diameter (D) | 32 mm |
| Overall Length (L) | 42 mm |
| Number of Ball Rows | 5 |
| Retainer Material | Metal (GA designation) |
| Seal Type | Open (No seals) |
| Precision Grade | High Grade (Standard) |
| Basic Dynamic Load Rating (C) | 863 N |
| Basic Static Load Rating (C0) | 1,370 N |
| Inner Diameter Tolerance | 0 to -0.010 mm |
| Outer Diameter Tolerance | 0 to -0.016 mm |
| Operating Temperature | -15°C to +80°C |
| Material | High-carbon chromium bearing steel |
Key Features (from THK)
- Metal Retainer: The robust metal cage ensures precise guidance of steel balls, stable running accuracy, and suitability for high-speed or vibration-prone environments.
- High Precision: Manufactured to THK's High Grade standards, offering minimal eccentricity (15 µm) and dimensional accuracy.
- Compact & Standard: Complies with international standard dimensions for easy interchangeability and integration into various machinery.
- Multi-Row Configuration: Five rows of balls provide balanced load distribution and smooth linear movement.
- Lubrication Hole: Equipped with a standard grease hole for convenient maintenance.
Typical Applications
- Automated machinery and assembly lines
- Semiconductor manufacturing equipment
- Precision measuring instruments
- Office automation and 3D printers
- Robotics and pneumatic cylinders
