Wrist & tooling
Wrist Reducer
Provides the compact gear reduction stages inside the wrist unit that drive the final axes of motion.
Wrist reducer is a general term covering the compact harmonic or planetary gear stages built into the wrist unit that convert wrist motor output into the torque needed to move the tool flange, usually referring to the J5 and J6 stages together.
These reducers are sized for the wrist's rated payload and moment load, and exceeding those ratings with oversized or offset tooling accelerates wear well beyond the manufacturer's expected service life.
Because wrist reducers sit deep inside the wrist unit housing, most service work on them happens as part of a full wrist rebuild rather than as an isolated repair.
Related components
Common questions
- What does the Wrist Reducer do?
- Provides the compact gear reduction stages inside the wrist unit that drive the final axes of motion.
- How does the Wrist Reducer fail?
- Common failure modes: Accelerated wear from exceeding rated wrist payload or moment load, Backlash increase affecting tool orientation accuracy, Grease contamination from a wrist seal failure, Damage from a tooling-side collision.
- What fault codes relate to the Wrist Reducer?
- Related codes include SRVO-021.