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24-Hour Rush Repair
Industrial gearbox bench · Fontana, CA
Philadelphia Gear Gearbox Repair in Fontana
Philadelphia Gear built its name on large, engineered gear drives — the custom parallel-shaft and right-angle units and high-speed drives that sit at the heart of power plants, steel mills, water works and process lines. When one of those drives needs more than bearings and oil, our Fontana shop does the full job under one roof: teardown and inspection, gear measurement, rebuild, and manufacture of replacement gearing for drives whose parts support has thinned out with age.
Industrial gearbox bench · Fontana, CA
Large custom and high-speed gear drives, rebuilt in-house
Engineered drives punish guesswork. Every Philadelphia Gear unit we take in is opened, cleaned and measured before it is quoted — tooth wear and contact pattern, bearing fits, shaft condition, housing bores — so the scope on paper matches the drive on the bench. Gearing worn past limits is reverse-engineered from the original parts and cut new in our own gear shop, matched to the original ratio, center distance and tooth geometry, then assembled with fresh bearings and seals and clearances set to build specification.
Brands we servicePhiladelphia GearFalkFlenderHansenDavid BrownLufkinSEW-Eurodrive
Philadelphia Gear Gearbox Repair in Fontana · Fontana, CA
Philadelphia Gear industrial gearbox gearing machined at LA Trucks and Tractors in Fontana
When the factory answer is a lead time, the bench answer is a rebuild
A big engineered drive is rarely a shelf item — replacement can mean engineering review, a long build slot and piping and foundation rework around a different footprint. Rebuilding the drive you own keeps its housing, mounts and coupling exactly where your plant was built around them. Regular hours are Monday–Friday 6 AM–5 PM, and the rush line runs 24 hours a day, every day of the year, because a plant drive does not choose business hours to fail. Quotes are free and pick-up and delivery are free.
- Custom parallel-shaft gearbox rebuilding
- Right-angle and high-speed drive repair
- Reverse engineering of obsolete gearing
- Gear, shaft and housing-bore renewal
- Bearing and seal renewal to build clearances
Our 8-step repair process
A clear path from the first call to a tested component or machine returned to work.
Inspection
Disassemble and evaluate the complete failure.
Photos & video
Document condition and findings for a clear repair conversation.
Repair quote
Define the recommended work and quote before proceeding.
Approval
Confirm scope, urgency and the practical path forward.
Manufacturing
Machine, weld, rebuild or reverse engineer required components.
Testing
Verify operation and workmanship before release.
Shipment
Return the completed component or equipment to service.
Frequently asked questions
Can you make gears for a Philadelphia Gear drive that is no longer supported?
Yes — that is core work for our gear shop. We measure the worn gearing, work out the original geometry, and manufacture replacements matched to the drive's ratio and center distance.
Do you inspect before quoting a large gearbox rebuild?
Always. The drive is torn down and measured first — gears, shafts, bearings and housing bores — and the quote is written from those measurements, not from a guess over the phone.
Related services
Emergency breakdown? Call the 24-hour rush line.
(949) 400-2937Schedule service or open a repair order
Request a service call.
Include the make, model, symptoms, location, urgency and preferred service time. Your details open in a text to John so you can review them before sending.