®Industrial Gearbox Replacement Checklist
A gearbox is not a direct replacement simply because the ratio or size code is similar. Mechanical interface, output geometry, mounting-hole pattern, motor interface and performance must all be checked.
Mechanical fit checklist
- Mounting type
- Output shaft diameter / hollow bore
- Shaft extension and key
- Center height or centerline reference
- Mounting-hole pitches
- Hole diameter or thread
- Output flange OD, register and PCD
- Critical envelope dimensions
- Motor interface
Performance checklist
- Ratio and output speed
- Rated output torque
- Service factor
- Input power and speed
- Radial/axial loads
- Duty cycle and environment
Only when mechanical fit and performance both pass should the replacement be described as a direct replacement.
How this applies to R, F, K and S gear units
The same engineering principle applies across the CHINFAR four-series platform, but the mechanical layout changes: R is inline/near-inline, F is parallel-shaft, and K/S are right-angle families. Use the principle to define the requirement, then select a configuration within the appropriate family.
Related product families
- R Series Helical Gear Unit
- F Series Parallel Shaft Helical Gear Unit
- K Series Helical-Bevel Gear Unit
- S Series Helical-Worm Gear Unit
Related products & technical resources
Need a gearbox configuration for your machine?
Send the required motor power, input speed, target output speed or ratio, expected output torque, mounting arrangement, and any installation drawing available. CHINFAR can use these inputs to narrow the R/F/K/S configuration before final engineering confirmation.
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