Step by Step Installation Guide of WSJ180 20 I Worm Gear Reducer

1. Pre-installation Inspection

Unit Inspection

Upon unpacking, inspect the reducer for shipping damage including housing cracks and distorted bearing seats. Verify model specifications match design requirements: 20:1 reduction ratio and 180mm center distance.

Accessories Check

Confirm all supplied components are complete: anchor bolts, locating pins, oil filler cap and other fittings.

Manual Rotation Test

Turn the input shaft by hand. No binding or abnormal noise is acceptable; the worm and wormwheel mesh should operate smoothly.

2. Foundation & Mounting Surface Preparation

Foundation Requirements

Concrete or steel base must maintain flatness with tolerance ≤0.1mm/m. Uneven foundations will induce uneven loading on the gearbox housing.

Surface Cleaning & Levelling

Remove grease and contaminants from mounting surfaces. Use steel shims for levelling adjustment. Wood or rubber shims are prohibited.

3. Lifting & Positioning

Lifting Rules

Use factory lifting lugs or wrap steel ropes under the gearbox housing. Never sling cables around input or output shafts.

Horizontal Mounting

Keep the worm shaft horizontal while the wormwheel shaft stays vertical. Tilting or vertical mounting configurations are not permitted.

4. Levelling & Fastening

Horizontal Alignment

Use a precision level (0.02mm/m accuracy) to measure end faces of input and output shafts. Horizontal deviation shall not exceed 0.1mm/m.

Bolt Tightening

Tighten anchor bolts in diagonal sequence uniformly. For M20 bolts, apply torque from 300 to 400 N·m. Recheck levelness after tightening.

5. Shaft End Connection

Input Shaft (Motor Side)

Fit flexible couplings such as jaw couplings. Rigid direct coupling is forbidden. Alignment tolerance: radial offset ≤0.1mm; angular tilt ≤0.2mm/m.

Output Shaft (Load Side)

Flange mating surfaces must maintain tight contact with clearance ≤0.05mm. Tighten flange bolts evenly. For applications with axial load e.g. lifting machinery, install an additional thrust bearing housing.

6. Lubrication & Commissioning

Lubrication Specifications

Fill dedicated worm gear oil (VG220 grade) before initial startup. Maintain oil level up to two-thirds of the sight glass.

No-load Trial Run

Run the reducer for 2 hours without load. Continuously monitor noise, vibration and temperature rise. Shut down immediately if any abnormality occurs.

7. Important Notes

Operating Environment

Keep the unit away from high temperature, heavy dust and corrosive atmosphere. Install protective guards where necessary.

Long-term Storage

If storage duration exceeds 4–6 months, inspect oil seal elasticity and replace seals as required.