Precision Double Lead Worm Gear Set, Zero Backlash, For CNC Rotary Table 4th Axis

Name: Precision Double Lead Worm Gear Set, Zero Backlash, For CNC Rotary Table 4th Axis
Brand: GLOBALMACHEX
Availability: InStock
Rating: 5 (1 reviews)

Precision double lead worm gear (variable tooth thickness) features zero/low backlash, with adjustable clearance by axially moving the worm. Wear compensation ensures long-term high precision. Widely used in CNC rotary tables, 4th axis, robots, radar, medical equipment and other precision transmission applications.

$1.00 - 500.00

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Dezhou Darui Machinery Equipment Co., Ltd.

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Registration Date March 2, 2017

Number of Employees 20

Factory Area 4,580 m²

Annual Sales 15 Million RMB

Main Products Screw Jacks, Ball Screw Jacks, Electric Linear Actuators

Target Markets Global

Details

Specifications

Product Overview

Precision double lead worm gear (variable tooth thickness) is a high-precision transmission set with zero/low backlash. The worm has different leads on two flanks; moving the worm axially can accurately adjust backlash without changing center distance. It supports wear compensation and maintains long-term high precision.

2. Structure & Principle

Worm: Double-lead design, different left/right leads, linear tooth thickness change
Wheel: Tin bronze / aluminum bronze, matching variable tooth profile
Adjustment: Axial movement → backlash adjustable 0～0.01mm
Feature: Line contact, multi-tooth meshing, low vibration, low noise, high rigidity

3. Key Advantages

Zero/low backlash, angular backlash ≤1 arcmin
Wear compensation, service life extended 3–5 times
High positioning & indexing accuracy
High rigidity, low vibration, noise ≤55dB
Self-locking for anti-reverse safety
Compact structure, smaller size at same torque

4. Typical Applications

Precision machine tools: CNC rotary table, 4th axis, tool changer, grinder axis
Automation: Robot joint, precision positioning stage, vision inspection
Aerospace: Radar turntable, antenna drive, precision actuator
Medical: CT scanner, surgical robot, precision lifting table

5. Selection Guide

High precision / positioning / indexing → choose double lead
High-frequency forward/reverse / continuous running → double lead preferred
Select center distance by torque ×1.25 safety factor
Ratio 10.25–90, customizable up to 400

Product Name

Precision Double Lead Worm Gear Set

Module

1.5～10mm (Common 2/3/4/5/6)

Center Distance

45/50/55/63/75/90/100/125mm

Ratio

10.25/19.5/30/40/60/90 (Custom 20–400)

Worm Starts

1 start (standard), 2 starts optional

Backlash

Adjustable 0～0.01mm (Precision Grade)

Angular Backlash

≤1 arcmin

Indexing Accuracy

±0.5～±2 arcmin

Worm Material

40Cr/42CrMo/38CrMoAl

Wheel Material

Tin Bronze / Aluminum Bronze

Accuracy Class

Worm 4–6, Wheel 5–7 (GB/T 10089)

Rated Torque

50～800N·m

Efficiency

75%～92%

Operating Temp

-20℃～+80℃

Duty Cycle

S1 Continuous Operation

Description