How to determine if the NGW-L51 planetary gearbox is installed properly

To determine whether the NGW-L51 planetary gearbox is installed properly, it is necessary to start from three core dimensions: mechanical fit accuracy, stress state, and operational stability. Combined with installation specifications and measured data, comprehensive verification should be carried out to avoid problems such as abnormal noise, vibration, and shortened service life caused by installation deviations in the later stage. The following is a specific judgment method, following the logical step-by-step explanation of "static inspection after installation → dynamic trial operation verification":
1、 Static inspection after installation: Core verification of 'hard fit accuracy'
Static inspection is the basis for determining whether the installation is in place, and it is necessary to use tools to measure key dimensions and status to ensure that each component meets the design requirements. Focus on the following 5 items:
1. Flatness and fit of the base: Confirm that there is no virtual position in the foundation

Inspection tools: precision level (accuracy ≥ 0.02mm/m), feeler gauge (0.02-1mm specification), dial gauge.

Inspection method:

Place the level on the four diagonal positions and the central area of the reducer base, record the level reading, and ensure that the overall levelness error of the base is ≤ 0.1mm/m (refer to the general installation standard for planetary reducers, and refer to the manufacturer's manual for details);

Insert a feeler gauge into the fitting gap between the reducer base and the installation base. The insertion depth of the feeler gauge on all fitting surfaces should not exceed 10mm (and a 0.05mm feeler gauge should not be able to be inserted). If the local gap is too large (such as>0.1mm), it indicates that the flatness of the base or the reducer base is deformed, and there is a "virtual support", and the base needs to be readjusted.

2. Input/output shaft coaxiality: avoid "forced force"
As a planetary reducer, NGW-L51 requires the input shaft to be strictly coaxial with the motor shaft and the output shaft to be strictly coaxial with the load shaft (such as gears, couplings, and screws), otherwise additional radial forces will be generated, exacerbating bearing wear.

Inspection tools: dial gauge (with magnetic gauge holder), centering sleeve (or coupling half body).

Inspection method:

On the input shaft side: Place the dial gauge head against the outer circle (or centering reference surface) of the coupling between the motor shaft and the gearbox input shaft, manually rotate the motor shaft once, and record the maximum difference (radial runout) of the dial gauge, which should be ≤ 0.05mm;

Output shaft side: Similarly, rotate the output shaft, with a radial runout of ≤ 0.08mm (the output shaft load is usually larger, and the tolerance can be slightly relaxed, subject to the manufacturer's drawings).

3. Tightening bolt status: Ensure "even force distribution"

Inspection tools: torque wrench (corresponding to bolt specifications such as M12, M16), torque comparison table (refer to the gearbox installation manual).

Key inspection points:

Tighten all fastening bolts of the base in a diagonal cross order, with torque strictly in accordance with the manufacturer's requirements (such as M12 bolt torque of about 45-55N · m), to avoid deformation of the base caused by over tightening of a single bolt;

The bolts are not loose or loose, and the washers (flat washers+spring washers) are fully installed and fit the base without any gaps (can be checked with a feeler gauge