Spur & helical gear grinding
External tooth grinding on pinions, wheels and shafts. Profile and lead corrections to drawing, crowning and tip relief where specified.
Precision gear grinding · Atherstone, Warwickshire
Gears ground to the drawing.
Every flank, every time.
Ground Form Gears is a specialist subcontract gear grinding company. We finish-grind spur, helical and internal gears, splines and pinion shafts for engineering companies across the UK, from a single replacement gear to production batches, and we prove every one on inspection before it leaves.
- Spur · helical · internalexternal and internal tooth grinding
- Quality to the drawingDIN, ISO and AGMA grades held
- One-offs to batchesbreakdowns, prototypes, production
0gear forms ground: spur, helical, internal
0gear minimum order: single replacements and breakdowns welcome
0of parts inspected before despatch
0typical quote turnaround from a drawing
What we do
Gear grinding, and the work around it
We grind the teeth. Bring us a drawing, a sample or a worn gear and we take it from there: the right stock allowance, the grind, and the paperwork that proves it.
Internal gear grinding
Ring gears and internal splines finish-ground after heat treatment, holding the tooth thickness and runout the assembly needs.
Pinion shafts & splines
Teeth ground true to the journals, so the gear runs on the bearings it was designed for. Involute splines to the same standards.
Inspection & measurement
Span, over pins, profile, lead, pitch and runout checked against the grade on the drawing. A report with every job when you want one.
Reverse engineering
No drawing? We measure the gear you have, identify module, pressure angle, helix and profile shift, and grind the replacement to match.
Breakdowns & rework
Salvage grinds on distorted or damaged gears where there is stock to work with, and fast turnaround when a machine is down.
Gear forms
Drawn to scale from real geometry
Every gear below is generated from its actual tooth geometry, the same maths we grind to. Hover to see the specification.
Capabilities
What we can take on
The figures below are our usual working envelope. If your part sits outside it, ask; we will tell you straight away whether we can do it.
| Gear types | External spur and helical, internal spur and helical, involute splines, pinion shafts |
|---|---|
| Module range | Fine to coarse pitches, metric module and DP |
| Diameter | Small pinions to large wheels, on centres or in a chuck |
| Helix angle | Spur to steep helix, left or right hand |
| Quality | DIN 3962 / ISO 1328 grades to the drawing; AGMA on request |
| Materials | Case-hardened, through-hardened, nitrided and induction-hardened steels; cast irons; bronzes |
| Inspection | Span and over-pin measurement, profile, lead, pitch, runout; reports supplied |
| Quantities | One-off replacements, prototypes, repeat batches |
How we work
From drawing to despatch
- 1
Drawing or sample in
Send the drawing, or the gear itself. We check the geometry, the grade and the stock left on the flanks, and tell you if anything on the drawing will cause a problem.
- 2
Quote
A clear price and lead time, usually within two working days. Batches priced per part; breakdowns prioritised.
- 3
Goods in
Your parts are booked in against the order, checked for damage and hardness where it matters, and each line is tracked from here.
- 4
Grinding
Set up to the drawing, first-off measured, then the batch. Profile, lead and thickness are held to the grade you asked for.
- 5
Inspection
Span or over-pin measurement on every gear, with profile and lead traces on request. Nothing leaves without the numbers.
- 6
Despatch
Labelled per line with a delivery note, on our own transport locally or by carrier, with the inspection report if you want it.
Who we work for
Gearboxes in every sector
Most of our work comes from gear manufacturers, gearbox builders and maintenance teams who need a finish-ground flank they can trust.
Gear manufacturersGearbox & drive buildersMotorsportAutomotiveRailAgricultural machineryMaterials handlingMarinePumps & compressorsMachine toolsPlant maintenanceReconditioners
About us
A gear grinding specialist, not a general machine shop
Ground Form Gears does one thing: the finish grinding of gear teeth. It is the last operation on a gear and the one that decides whether it runs quietly and lasts. Because it is all we do, our engineers know the job inside out, from the stock allowance a hobbed gear needs before heat treatment to the profile corrections that make a gearbox quiet.
We work for gear cutters who send us their finishing, gearbox builders who want a grade proved on paper, and maintenance engineers who need a replacement for a gear nobody has a drawing for. We treat all three the same way: measure it, grind it, prove it.
- Specialist gear grinding, external and internal
- Every gear measured before it leaves
- Reverse engineering when there is no drawing
- Straight answers on lead time and price
Add your history, accreditations and team here.
Questions we get asked
Before you send a job
How much grinding stock should be left on the teeth?
For most sizes we like 0.10 to 0.20 mm per flank after heat treatment, measured as a change in span or over pins. Too little and a distorted gear will not clean up; too much wastes grinding time and can burn the flank. Tell us the tooth count, module and helix angle and we will give you a span figure to cut to.
Can you grind a gear with no drawing?
Yes. Send the gear, or the mating gear, and we measure it: tooth count, outside and root diameters, span over teeth, helix angle. From those we identify the module, pressure angle and profile shift and grind the replacement to match. Where two standards fit the same measurements we will say so and ask which the original was.
What quality grades can you hold?
We grind to the DIN 3962 or ISO 1328 grade on your drawing, and quote AGMA equivalents when that is what the drawing carries. The achievable grade depends on the blank: how true it was cut and how it distorted in hardening. We will tell you at quoting stage if the stock or the datum faces are not going to support the grade asked for.
What do you need with the parts?
The drawing, the quantity, the grade, and how the part is located: bore, journals or centres. If the gear is one of a pair, the mating gear's details help us set the tooth thickness correctly. A purchase order number saves everyone time.
How fast can you turn a breakdown around?
Tell us it is a breakdown when you call. Single gears with stock on them are usually ground the same or next working day, subject to the work already on the machines.
Contact
Send us a drawing, or just call
We would rather talk about a job early than find a problem on the machine. Phone, email, or use the form and attach the drawing.
Phone01827 718555
AddressUnit F, The Pavillions
Holly Lane Industrial Estate
Atherstone, Warwickshire CV9 2QZ
Holly Lane Industrial Estate
Atherstone, Warwickshire CV9 2QZ
HoursMonday to Friday, 08:00 to 17:00