Subcontract manufacturingOldbury, West MidlandsEst. 1979
Made tofive microns.
We machine, fabricate and assemble critical parts for aerospace, medical, motorsport and energy customers, then prove every one of them.
- Company
- Kelderby Precision Ltd
- Processes
- 5-axis milling · turning · sheet metal · assembly
- Founded
- 1979
- People
- 142
- Machines
- 24
- Floor area
- 41,000 sq ft
Who we are
A family-owned contract manufacturer in the Black Country. We take a drawing, a model and a deadline, and send back parts with the paperwork to prove they are right: first article reports, material certificates, inspection data and a named engineer who knows the job.
From bar to boxed and certified.
Machined, formed, finished, assembled and inspected in one building, so nothing waits in a van between suppliers.
- 01
5-axis milling
- Envelope
- Up to 1,050 × 800 × 600 mm
- Tolerance
- ±0.005 mm on critical features
- Batch
- 1 to 2,000 off
- 02
Turning & mill-turn
- Envelope
- Bar Ø3 to Ø65 mm · chuck to Ø420 mm
- Tolerance
- ±0.005 mm, Ra 0.2 µm ground-finish turning
- Batch
- 10 to 50,000 off
- 03
Sheet metal
- Envelope
- Sheet 3,000 × 1,500 mm · bend 3,000 mm
- Tolerance
- ±0.1 mm cut, ±0.2 mm bend
- Batch
- 1 to 5,000 off
- 04
Assembly & test
- Envelope
- Benches to 2,000 × 1,000 mm
- Tolerance
- Torque ±2% traceable
- Batch
- 1 to 10,000 sets
- 05
Finishing & special processes
- Envelope
- Tank 1,200 × 600 × 800 mm
- Tolerance
- Build allowance planned per finish
- Batch
- Any
Ninety per cent of the job is decided before the spindle turns. The fixture, the datum, the probe routine.
Fig. 1 · Cell B, KP-M03 · 32-pallet 5-axis, unmanned weekend running
Four sectors. Each with its own rulebook.
We focus on industries where a part has to be traceable, qualified and right first time. It is what our quality system was built for.
Aerospace & space
Flight hardware, actuation, ground support and small-satellite structures in titanium, aluminium and nickel alloys.
Sector detail
Medical devices
Implant instruments, surgical tooling and device sub-assemblies, validated and clean-built.
Sector detail
Motorsport
Fast-turn, high-strength parts for race and performance programmes, when the car is due on track on Friday.
Sector detail
Energy & hydrogen
Valve bodies, manifolds, electrolyser and fuel-cell components, and wind-turbine service parts.
Sector detailMeasured, like everything else.
We report our own numbers the way we report a part: nominal, tolerance, measured. Figures on this concept site are illustrative.
| Characteristic | Nominal | Tolerance | Measured | Against target | Status |
|---|---|---|---|---|---|
| On time in full, to original promise date | 100% | ≥ 96% | 98.6% | Pass | |
| Customer PPM (rejected parts per million) | 0 | ≤ 250 | 118 | Pass | |
| First-article reports, days from order | 5 | ≤ 10 | 7.2 | Pass | |
| Critical-feature Cpk, aerospace KCs | 2.00 | ≥ 1.33 | 1.71 | Pass | |
| Quotations returned within 3 working days | 100% | ≥ 90% | 94% | Pass | |
| Apprentices completing their programme | 100% | ≥ 85% | 92% | Pass |
One setup. Zero escapes.
Case 01 · KP-CS-0117 · Aerospace · Ti-6Al-4V
Actuator end fittings, 41% faster without a single escape
A legacy fitting made in three operations on two machines, with a bore position that drifted between setups and a reject rate the customer had learned to live with.
Will it fit? Ask the machine list.
Every machine we run, with its envelope. Enter your part size and we will show you which ones can take it.
| Ref. | Machine | Axes | Envelope, mm |
|---|---|---|---|
| KP-M08 | DMG MORI DMU 125 P duoBLOCK 5-axis milling | 5 | 1,250 × 1,250 × 1,000 |
| KP-M03 | Hermle C 42 U, 32-pallet 5-axis milling | 5 | 800 × 800 × 550 |
| KP-M09 | Kern Micro HD 5-axis milling | 5 | 350 × 220 × 250 |
| KP-T01 | Mazak INTEGREX i-200S Mill-turn | 9 | Ø658 × 1,011, bar Ø65 |
| KP-T07 | Star SR-32JII Sliding head | 12 | Bar Ø32, 320 per chuck |
| KP-S01 | TRUMPF TruLaser 3030 fiber, 6 kW Laser cutting | 3 | 3,000 × 1,500, to 20 mm |
| KP-Q01 | ZEISS CONTURA 10/12/6 CMM Inspection | 3 | 1,000 × 1,200 × 600 |
Quote inthree days.Lead time in thirty seconds.
- 1Build your requestProcess, material, quantity, tolerance and finish. Attach the drawing.
- 2See an indicative lead timeWorked out live from your choices, before you send anything.
- 3Get a reviewed quotationFrom an engineer, within three working days, with any questions about manufacturability.
Audited by people who do not know us.
GCareers · 7 open roles
61 apprentices trained since 1985. Four more in September.
Setters, programmers, inspectors and apprentices. Day and night shifts, paid overtime, and a training budget nobody has to fight for.