Third-generation, family-owned · 75+ years
Proud Britishprecision gear & transmission engineering
High-precision gears, shafts and complex machined components for aerospace and high-performance industries. Made in Stoke Mandeville. Flying on the A320, A350 and A380.
Old world craftsmen on the leading edge of technology
Not everyone can make complex, high-precision production and prototype gear components. We've been doing it for over 75 years, from industrialisation through to long-term serial production.
We build long-term partnerships, bringing determination and engineering tenacity to technically demanding programmes.
Years of engineering heritage in British precision gears.
A family-owned business, run by the third generation.
From design and turning to gear grinding and assembly, all in-house.
Approved gear supplier to the aerospace and aviation industry.
Inside the systems that keep aircraft flying
We make fully traceable gears, shafts, splines and actuation components for critical in-flight applications. Select a system to see where our parts go to work.
Explore by system
Wing flap actuation
Wing actuator gears and custom actuation gearing for high-lift systems, made to very tight tolerances in high tensile aerospace materials.
- Wing actuator gears
- Planet gears
- Custom actuation gears
Gears, shafts and splines, made to drawing
Short-run production and prototype machining, through to serial production. Add parts to your enquiry and we'll quote the lot together.
Ground precision gearsFlight-critical accuracy
Helical & spur gearsCut, shaped and ground
Internal gearsShaped and ground internally
Small gears & pinionsPrecision at miniature scale
Worm & wheelSmooth, high-ratio drives
Splines & shaftsInternal and external splines
Torque & quill shaftsActuation and power transfer
Assemblies & jointsUniversal, articulating, plunging
Every process in-house, from first cut to final inspection
You need technical solutions and the shortest lead times possible, within budget. Keeping every process under one roof is how we deliver both.
Design & prototyping
ExploreGround in Bucks. Now orbiting Earth.
Our precision ground planetary gears are in orbit, travelling at more than 17,000 miles per hour. A huge endorsement of our people, our investment and the gear-making capability of our Stoke Mandeville site.
Orbital speed of the planetary gears we ground on site
Above the planet, a long way from Stoke Mandeville
Room for error. The standard every part leaves our site at
Relied on where performance is non-negotiable
01Aerospace
Flight control, wing flap, landing gear, fuel management and reverse thrust components for civil programmes.
Explore aerospace
02F1 & Motorsport
Gears and spline parts for Formula 1, Formula E, LMP, IndyCar, Rally and MotoGP, direct to teams or via assemblers.
Explore motorsport
03Electric vehicle
Prototype and production transmissions and rotor hub drives for the next generation of EVs.
Explore EV
04Off highway
Drive shaft assemblies, spline clutch baskets and transmission components for CAT and JCB.
Explore off highway
05Hypercar & OEM
Gears, splines and sub-assemblies for high-performance transmissions, including the Mercedes-AMG ONE.
Explore hypercar
06Oil & gas
Shafts and gearing built to survive harsh, high-load environments.
Explore oil & gas
07Medical
Small, precise gears for equipment where reliability matters most.
Explore medical
08Marine & automotive R&D
Fast prototype turnaround and corrosion-resistant drive components.
Explore moreEvery tooth measured. Every part traceable.
Our temperature-controlled inspection department checks every critical feature against drawing, with calibration traceable to national standards.
- ZEISS CONTURA CMMWith dedicated gear-checking software
- Wenzel WGT 280 gear testersReal-time 4-axis measurement and scanning
- Single-flank and rolling gear testingPlus roundness, cylindricity and concentricity
Inspection report
Ground helical gear · 31T · Batch GG-24169100
One partner, from concept to certified part
Design, gear manufacture and 5-axis machining under common ownership. Fewer hand-offs, faster programmes.
Gibbs Gears
High-precision gears, shafts, splines and transmission components for aerospace and specialist applications.
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Specialist engineering design for transmission and actuation systems, helping customers solve complex challenges with practical solutions.
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Copsey Engineering
Advanced 5-axis and prismatic machining for technically demanding, tight-tolerance components.
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Got a complex programme? Speak to an engineer.
Send us your drawing and requirements. We'll come back with manufacturability feedback and a quote, usually within one working day.
Prefer to talk? Call +44 (0)1296 739020