The backlash range of worm gear reducers varies depending on the model, accuracy level and usage scenario. The following are typical standards for each model:
1. Universal worm gear reducer
Cylindrical worm reducer
The backlash range is usually 0.1~0.3mm , suitable for general industrial transmissions
High-precision occasions (such as dividing heads) need to be controlled within 0.01~ 0.04mm
{ [t3]}Worm reducer
The backlash standard is similar to that of the cylindrical worm, but due to the optimization of the tooth shape, it can be appropriately relaxed to 0.15~0.5mm (such as WH series).
2. Double-stage worm gear reducer
Due to accumulated errors, the backlash of double-stage transmission is usually larger than that of single-stage transmission, ranging from about 0.2 to 0.6mm .
3. Adjustment standards for special working conditions
Servo drive
Side clearance needs to be strictly controlled, generally ≤ 0.15mm (or ≤30 arcmin).
Heavy load or high temperature environment
The side gap can be appropriately increased to 0.3~0.8mm to compensate for thermal expansion and wear.
4. International Standard Reference
According to ISO 1328 and AGMA 2000 standards, the backlash tolerance of grade 6 precision gears is ±0.02mm and grade 8 is ±0.05mm.
5. Precautions for adjustment
The backlash needs to be adjusted through the axial position of the worm gear or worm, and combined with contact spot detection (tooth surface contact area ≥ 50%).
The recommended measurement method is the dial indicator method (high accuracy) or the feeler gauge method (quick detection).
