--- title: Gearbox Repair and Rebuilding, Any Brand | Wolf Machine Reno url: https://wolfmachinenv.com/services/gearbox-repair/ business: Wolf Machine & Fabrication, Inc. address: 4812 Longley Ln, Reno, NV 89502 phone: (775) 359-5570 hours: Shop Monday-Friday 7:00 am-3:30 pm; closed Saturday and Sunday type: Metal and plastic fabrication and machining (custom and CNC machining, welding, metal and plastic fabrication, gearbox and part repair, align boring, metal spray) --- [Photo: Stock photo: a milling machine cutting metal under coolant spray] - [Home](https://wolfmachinenv.com/) - [Services](https://wolfmachinenv.com/services/) - Gearbox repair and rebuilding # Gearbox repair and rebuilding, any brand or size We repair and rebuild gearboxes of any brand or size at our Reno shop. We take the box apart, inspect every part and bring the worn housing bores, shafts and seal surfaces back to size. Line drawing. Stock photo: a milling machine cutting metal under coolant spray A gearbox rarely fails all at once. A bearing seat wears, the bearing creeps, the gears lose their mesh and the noise starts. Gearbox rebuilding is one of the things we specialize in, and the work we list for it comes from mining, sawmills, power companies and the printing industry. ## At a glance - Gearbox repair, any brand or size - Housing bores and bearing seats rebuilt to size - Shafts, keyways and seal surfaces repaired - Balancing arranged with an outside shop after machining I have used Wolf Machine several times over the past few years for fabricating and repair of parts on my ultralight aircraft. [...] These guys are great to deal with. I wouldn't take my projects anywhere else. James B. ยท Google review, September 2023 [Leave us a Google review](https://search.google.com/local/writereview?placeid=ChIJVWVOfCI_mYARibcFMPsDEKc) ## Who sends us gearboxes Our own list reads "Gear Box Rebuild: Mining Industry, Saw Mills, Power Companies and the Printing Industry." Those are plants where a gearbox runs for long hours under load, and where a failed one stops a line. The rebuild is aimed at getting the unit back to the fits it was built with. ## Where a gearbox usually wears The case does most of the damage to the rest of the box. When a bearing bore in the housing wears oversize, the bearing moves, the shaft shifts, and the gears run out of mesh. When a seal surface on a shaft is grooved, oil leaks out and dirt gets in. Rebuilding the gears alone will not hold if the housing underneath them is out of size. For that reason the housing and shafts get as much attention as the gears. A worn bore can be built up by [metal spray](https://wolfmachinenv.com/services/metal-spray/), a sleeve or weld and then machined back, and a boring job across several bores uses [align boring](https://wolfmachinenv.com/services/align-boring/) so the shafts line up again. ## Balancing after machining Rotating parts such as shafts and rotors sometimes need balancing once the machining is done. That step is arranged with an outside balancing shop after machining, and we coordinate it as part of the job. ## Why a rebuild beats waiting for a new box Gearboxes are often built for one machine or one line, and a replacement for an older unit can be hard to find. A rebuild keeps the box you have, with its mounting, its ratio and its fit on the driven equipment. Send the nameplate details and a few photos, and we will tell you what we see in the housing and the shafts before anything is taken apart. ## How to start Send the brand and model if you have them, the symptoms (noise, heat, leaks, metal in the oil) and photos of the housing and the nameplate. The step-by-step of a rebuild is in our guide [a gearbox rebuild: what to expect](https://wolfmachinenv.com/guides/gearbox-rebuild-what-to-expect/). To talk it through, call [(775) 359-5570](tel:(775)%20359-5570) during shop hours. ### Sources - [Wolf Machine & Fabrication home page](https://wolfmachinenv.com/) (2026-10-18) - [AGMA, American Gear Manufacturers Association](https://www.agma.org/) (2026-10-18) ### What goes into a rebuild - Teardown and cleaning so every part can be inspected - Housing bores checked for size, roundness and alignment - Shafts checked at the bearing journals, seal surfaces and keyways - Worn fits rebuilt by metal spray, sleeve or weld, then machined back to size - Reassembly with new bearings and seals ### Typical parts - Mine and mill drive gearboxes - Sawmill gearboxes - Power plant gearboxes - Press and roller drive gearboxes ### Materials [Steels and steel alloys](https://wolfmachinenv.com/materials/steel-and-steel-alloys/) [Bronze](https://wolfmachinenv.com/materials/bronze/) [All materials we machine](https://wolfmachinenv.com/materials/) ### How to send us the job Start with whatever you have: the drawing, the old part, or clear photos and a few measurements. Attach files to the quote request or bring the piece to 4812 Longley Ln. [Request a quote](#quote) [What to put on a drawing](https://wolfmachinenv.com/guides/what-to-put-on-a-drawing/) ### Talk to the shop [(775) 359-5570](tel:(775)%20359-5570) | Monday to Friday | 7:00 am - 3:30 pm | |---|---| | Saturday and Sunday | Closed | [Request a quote](#quote) ### Related - [A gearbox rebuild: what to expect](https://wolfmachinenv.com/guides/gearbox-rebuild-what-to-expect/) - [Metal spray](https://wolfmachinenv.com/services/metal-spray/) - [Align boring](https://wolfmachinenv.com/services/align-boring/) - [Shafts, threads and keyways](https://wolfmachinenv.com/services/shafts-threads-and-keyways/) - [Mining](https://wolfmachinenv.com/industries/mining/) ### Questions about this service - [My machine is down. What should I do first?](https://wolfmachinenv.com/faq/my-machine-is-down/) ## Work from the shop [Photo: A grinder assembly: machined cutter housing between thick plate end flanges, coupled to an electric motor on a fabricated base] Job 02 A grinder assembly: machined cutter housing between thick plate end flanges, coupled to an electric motor on a fabricated base. [Photo: An inline grinder unit: bolted cutter housing with threaded ports, coupled to its electric motor on a steel base] Job 03 An inline grinder unit: bolted cutter housing with threaded ports, coupled to its electric motor on a steel base. [Photo: An industrial gearbox housing (speed reducer)] Job 11 An industrial gearbox housing (speed reducer). [See all our work](https://wolfmachinenv.com/gallery/) ## Related services - [Hydraulic cylinder repair](https://wolfmachinenv.com/services/hydraulic-cylinder-repair/) - [Pump, shaft and turbine repair](https://wolfmachinenv.com/services/pump-and-turbine-repair/) - [Electric motor shaft and endbell repair](https://wolfmachinenv.com/services/electric-motor-shaft-and-endbell-repair/) - [Rotary valve and airlock rebuilding](https://wolfmachinenv.com/services/rotary-valve-and-airlock-rebuilding/) - [Rock crusher and screen parts repair](https://wolfmachinenv.com/services/crusher-and-screen-parts-repair/) - [Metal spray](https://wolfmachinenv.com/services/metal-spray/) ## Gearbox repair and rebuilding questions Still have a question? Call [(775) 359-5570](tel:(775)%20359-5570), Monday to Friday, 7:00 am to 3:30 pm. ### Can you rebuild a gearbox from any manufacturer? Yes. Our gearbox repair is any brand and any size. Send the nameplate and photos and we will look at the job. ### Do you do the balancing? Balancing is arranged with an outside balancing shop after machining, so the rotating part is machined here and balanced there. [Photo: Stock photo: a lathe turning a bar, hot chips flying] ## Request a quote Tell us what you need, attach a drawing or photos of the part, and we will get back to you during shop hours. Free consultations; prompt estimates. [Call (775) 359-5570](tel:(775)%20359-5570) - From your specifications, drawings or samples. We can also assist you in designing your product or part. - Free consultations and prompt estimates - Stands behind the work: Our rates are very competitive and our quality is second-to-none. Wolf Machine stands behind the work we perform. - Company accounts: all major credit cards, or we can open an account for your company Shop hours Monday to Friday, 7:00 am to 3:30 pm. Send your request any time and we will get back to you during shop hours. Stock photo: a lathe turning a bar, hot chips flying