Industrial Gearbox & Robot Reducer Repair
Signs your gearbox or robot reducer is failing
Unusual temperature, noise, or vibration is a deviation from normal operation and is a signal to shut the unit down and investigate before a bearing or gear failure becomes a housing failure. Oil leakage can come from a worn cover seal, an incorrectly installed breather, an overfilled sump, or cold-start foaming. An output shaft that will not turn while the motor or input shaft is rotating usually points to an interrupted shaft-hub connection.
- Abnormal noise near the mounting feet, often traced to loose retaining hardware
- Running noise consistent with bearing damage, confirmed by a noise check
- Overload on a single axis, which can mean mechanical binding, a failing reducer, or a brake that is not fully releasing
- A safety-circuit stop from an e-stop, light curtain, interlock, or scanner, which is not by itself proof of a failed gearbox or reducer
Record the alarm code, subcode, axis, and program line before clearing anything, since alarm numbering is not interchangeable between FANUC, KUKA, and ABB.
How we repair and rebuild gearboxes and reducers
Industrial gearbox repair typically starts with disassembly, diagnosis, and root-cause analysis, followed by replacement of wear parts such as bearings and seals, manufacture or replacement of gears and shafts, rework of gearing, shafts, and housings, reassembly, painting, and a final test run. Helical, bevel, worm, and planetary gearboxes each get inspected at the gears, shafts, bearings, seals, housing, lubrication path, and mounting interfaces. Extruder gearbox repair follows the same sequence but includes closer attention to thrust bearing wear and output-shaft runout given continuous one-direction loading.
RV reducer repair and harmonic drive repair follow the reducer manufacturer’s model-specific manuals and drawings rather than a generic procedure, since Nabtesco RV and Harmonic Drive strain wave units differ significantly by frame size and gear ratio. Robot reducer repair on FANUC, KUKA, and ABB arms means removing the reducer from the axis housing, inspecting cross-roller or ball bearings and gear teeth, and rebuilding to the tolerances that axis requires.
Models and part families we repair
- Falk helical and bevel industrial gearboxes
- SEW-Eurodrive helical, bevel, worm, and planetary gear units
- Sumitomo industrial gearboxes
- Nabtesco RV series robot reducers
- Harmonic Drive strain wave (harmonic) reducers
- FANUC robot arm reducers
- KUKA robot arm reducers
- ABB robot arm reducers
Testing and verification before it ships
Before a unit ships back, we run the checks that catch problems missed at assembly. Oil-leak checks confirm the cover seal, breather, and fill level are correct. Noise checks under rotation flag bearing or gear-mesh issues that were not visible during teardown. Load testing is performed when the repair scope or failure mode calls for it, and rotation direction is verified in a decoupled condition before the unit is run under load.
When the repair scope includes the complete geared motor or drive package rather than the gearbox alone, we also check the motor electrically, including a stator-resistance check and an impulse-voltage test of the windings. Protective and monitoring equipment stays enabled through every test, including test mode; it is never bypassed to get a unit through faster. A functional inspection closes out the job, and the gearbox, motor, brake, encoder, and inverter are documented separately so the paperwork matches what was actually tested.
Preventing failures with routine maintenance
Most gearbox failures show themselves early if someone is watching the right signals. Track oil level, oil quality, and viscosity, along with temperature, lubrication and cooling flow, bearing play, and vibration. An endoscope inspection of gear teeth and bearings, paired with a visual gear check, will catch pitting or chipping before it turns into a broken tooth. Check seals for early leakage and mounting hardware for the correct torque; loose feet are a common source of noise that gets misdiagnosed as a gear problem.
When changing oil, clean the gearcase of residue and abrasion first, and refill with the same oil grade specified for that unit. Keep the nameplate data, including type designation, serial number, and part number, on file so a repair request does not stall while someone hunts for it.
Repair versus replacement economics
A gearbox or robot reducer failure on a running line is a downtime problem before it is a parts problem. Ordering a new gear unit or reducer can mean a long wait, and that wait gets worse for older Falk and SEW-Eurodrive models, discontinued Sumitomo lines, or robot reducer part numbers that FANUC, KUKA, or ABB no longer stock. Repair is often the faster path back to production because it works from the housing and mounting interface you already have installed, so there is no re-engineering of brackets, couplings, or shaft interfaces to fit a replacement.
Cost-wise, a repair that reuses the housing, shafts where serviceable, and existing mounting hardware generally avoids the full capital cost of a new unit. For gearboxes and reducers that are still made but slow to source, repair buys time without committing to a purchase order that will not arrive before the line needs to run again.
Why work with Robotics Integration
Robotics Integration works across the brands most maintenance departments actually have on the floor: Falk, SEW-Eurodrive, and Sumitomo industrial gearboxes, Nabtesco RV reducers and Harmonic Drive strain wave reducers, and the robot reducers built into FANUC, KUKA, and ABB arms. That range matters when a plant runs mixed equipment and does not want to manage separate vendors for each gearbox brand.
We offer repair-and-return service for gearboxes and reducers that can be pulled and shipped, and on-site support for jobs where the unit is easier to diagnose or work on in place. Quoting starts with the nameplate data and a description of the symptoms or alarm code; a technician reviews that information, and photos when available, to identify the likely failure mode before providing a price and scope of work. That review is what determines whether the job is a bearing and seal replacement or a full gear and shaft rebuild.
Request a gearbox or reducer repair quote
To get a quote on gearbox repair, robot reducer repair, or robot gearbox repair, send the nameplate information: make, model or type designation, serial number, and part number. Add a description of the symptoms, including any alarm code, subcode, and axis if it is a robot reducer, plus what the equipment was doing when the problem started. Photos of the nameplate, the leak or damage location, and the general condition of the unit help us scope the job before it arrives.
Call 1-602-449-1556 to talk through a unit that is down or failing now, whether it is a Falk gearbox, an SEW-Eurodrive gear unit, a Sumitomo gearbox, an extruder gearbox, a Nabtesco RV reducer, a Harmonic Drive strain wave reducer, or a FANUC, KUKA, or ABB robot reducer.
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