Custom CNC machining for the brackets, housings, fittings and fasteners that sit around an engine. We hold ±0.005 mm across 127 machines, from one prototype to 10,000-part runs.
Most rejections we see are not about the complex parts. They are about the small ones bolted to them.
A bracket face out of flat by 0.05 mm lets the joint relax under vibration. Bolt torque drops, the fastener backs out, and the assembly fails a shake test. Flatness and hole position have to be called out and measured, not assumed.
Sensor bosses, oil galleries and dowel holes are dimensioned from each other. Stack up three setups and the error adds. One fixturing strategy with a single datum removes that stack, but only if the shop plans it before cutting.
A port thread with the wrong lead-in chamfer, or a face with a tool mark across the sealing path, will weep. Surface finish on a sealing face matters as much as the thread class. Ra 0.8–1.6 μm is usually the floor for an O-ring seat.
Small hardware goes through plating and coating. A thread cut to nominal before hardcoat anodizing will not accept a nut afterward. We machine to the post-finish envelope and mask threads when the print requires it.
Fixturing, tolerance and finish planned together, before the first cut.
Engine hardware is small, often thin, and frequently has to be machined on five or six faces. The usual failure is re-fixturing: each new setup introduces a new offset. We plan the datum scheme from the 3D model, then build soft jaws or a dedicated fixture so the same reference carries through every operation.
For parts with a bore-to-bore relationship under 0.02 mm, that single-datum approach is what keeps the relationship intact. If the geometry cannot be held that way, we will say so in the DFM notes and propose a design change instead of quoting a tolerance we cannot measure.
Much of this part family is round: fittings, spacers, valve bodies, threaded inserts, sensor housings. Those run best on a lathe, with the cross-drilled holes and milled flats done in the same cycle on a mill-turn center. That avoids handing the part between machines and losing concentricity.
Five-axis work covers the rest. Sensor bosses on a curved housing, angle-drilled oil passages, or a bracket with pockets on three faces can all be cut in one setup. Travel on the simultaneous 5-axis centers reaches 4,000 × 400 × 150 mm, so long rails and covers fit without splitting the part.
Use this to sanity-check the process before you send the model.
| Part feature | Recommended route | Why |
|---|---|---|
| Round body with cross holes | Mill-turn center | Concentricity held in one cycle |
| Angled oil passage | 5-axis machining | No repositioning between faces |
| Thin flat cover | 3-axis with vacuum fixture | Low clamp force, less bowing |
| Threaded port, sealing face | Turning, then thread mill | Thread class and finish controlled |
| Long rail over 1,000 mm | Large-travel 5-axis | Single setup along the full length |
| Prototype bracket, 2 pieces | 3-axis plus hand deburr | Fastest route at low volume |
Six groups that cover most of what arrives at the shop.
Machined from 6061-T6, 7075 or 4130 steel. Flatness and hole position called out on the print, measured on a CMM before shipment.
Thin-wall aluminium and magnesium housings with sealing faces. Clamping pressure managed to avoid distortion across the gasket path.
Threaded fittings, adapters and port bosses in stainless 316L, brass C36000 and titanium. Thread class and lead-in chamfer controlled.
Custom studs, spacers, dowels and threaded inserts. Run on lathes with secondary milling in the same cycle for concentric features.
Bosses with tight bore-to-bore relationships. Usually 5-axis work so the bore axis and mounting face come from one datum.
Thin parts in aluminium, stainless and copper. Vacuum fixturing and light cuts keep them flat through the finishing pass.
Values below are what we can hold repeatably, not what we quote once.
| Item | Range | Notes |
|---|---|---|
| General tolerance | ±0.005 mm (±0.0002 in) | On features that are measurable |
| Fine surface finish | Ra 0.2–0.8 μm | Sealing faces and bearing bores |
| Standard finish | Ra 0.8–1.6 μm | Default on most hardware |
| As-machined | Ra 1.6–3.2 μm | Non-critical faces |
| Aluminium | 6061, 7075, 2024, ADC12 | Plus 5052, 5083, 6063, 6082 |
| Stainless | 303, 304, 316L, 17-4PH | Plus 420, 430, 431, 440C |
| Steel | 1018, 1045, 4130, 4140, 4340 | A36 and tool steel available |
| Titanium and special | TC4, TA1, TA2, Inconel | Magnesium AZ31B and AZ91D |
| Plastics | POM, PEEK, PA, PP, HDPE | ABS, PC, PMMA, carbon fibre |
| Maximum part size | 4,000 mm | On large-travel machines |
| Plating | Nickel, zinc, silver, gold | Electroless nickel on request |
| Anodizing | Clear, colour, hardcoat | Conductive type available |
What we can be checked against.
Founded in 2011. The fixturing habits for small engine hardware come from repeat runs, not from a single job.
±0.005 mm, or ±0.0002 in. Features that cannot be measured to that level are flagged during DFM rather than quoted.
Parts that pass final inspection on the first submission. Raw material check, in-process monitoring and final inspection feed into it.
Send STEP or IGES plus a spec sheet. We return a price and manufacturability notes within 12 hours.
ISO 9001:2015, IATF 16949:2016, ISO 13485:2016 and ISO 27001:2022 cover quality and data handling.
One prototype or a 10,000-part run. Same process route, same inspection plan.
Brackets and housings with traceable material and in-process records.
Low-volume hardware with documented inspection reports on request.
Fittings and spacers in stainless and brass, run in repeat batches.
Small hardware in copper and aluminium with controlled surface finish.
±0.005 mm, or ±0.0002 in, on features we can measure with the inspection equipment on site. That usually means bores, faces, hole positions and diameters.
On thin walls, deep slots or unsupported overhangs, the practical limit is wider. We flag those features in the DFM notes and tell you what the achievable number is before you commit to the print.
Send a 3D model in STEP, IGES, SolidWorks or CATIA, plus a 2D drawing if the print carries tolerances, thread classes or finish callouts. The 2D sheet is what we machine to when the two disagree.
If the model is the only document, we will machine to nominal and note that in the quote so there is no surprise at inspection.
That depends on the coating. Hardcoat anodizing builds a measurable layer, so a thread cut to nominal beforehand will not accept a mating fastener. We either machine undersize to the post-finish envelope or mask the thread.
For plating, we account for the deposit thickness the same way. Tell us the finish spec at quoting stage and it goes into the process route.
There is no minimum order quantity. One prototype is fine. So is a 10,000-part run.
The process route changes with volume. A single bracket may be cut from plate on a 3-axis machine. The same bracket at 5,000 pieces gets a dedicated fixture and a shorter cycle.
Yes. Uploads are handled as confidential and we can sign an NDA on request before you send files.
ISO 27001:2022 covers how we handle information internally. If your program requires it, we can work from a controlled drawing package rather than a full assembly.
Every part gets a final inspection before it leaves. That includes raw material verification when the material certificate matters, in-process checks during the run, and a final dimensional check.
Inspection reports are available on request. For first articles, we can provide a fuller dimensional report tied to the ballooned drawing.
Quotation and free DFM analysis come back within 12 hours. Production can start within 24 hours of a released order. Standard parts ship in 3–5 days.
Longer runs and parts needing outside finishing take more. We will give the schedule in the quote rather than after the order is placed.
Yes, and often we should. If a bracket and its cover share a dowel pattern, cutting both from the same fixture keeps the relationship tight.
Send the pair or the sub-assembly. We will quote them as one route and note which dimensions are held as a matched set.
Upload a STEP file and a spec sheet. You get a price and DFM analysis within 12 hours, from one prototype to a full run.
12-hour quote100% inspectionNo MOQNDA on request
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Upload your 3D model or 2D drawing and get a quotation with a free DFM analysis. Maximum processing size 4,000 mm.
CNC Metals 13 grades
CNC Plastics 10 grades
Machines & processes 12 options
Surface & post-processing 10 options
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