Capability
Shafts, bushes, sleeves and mandrels where a fit, a runout or a surface finish decides whether the assembly performs. We plan the route around those features instead of discovering them at final inspection.
Best for
Drawings where fits, finish and concentricity decide function
You send
Drawing with revision, material, quantity and delivery target
You get back
Finished components with the critical dimensions reported
How it starts
Drawing reviewed before quotation, questions raised early
The situation
Critical components tend to be the ones with a demanding drawing and a small quantity — exactly the combination that large suppliers deprioritise and small ones decline.
What you get
Turned and ground components manufactured to validated drawings, with documented inspection.
Grinding allowances, datum choices and hardness sequence are decided before the first cut, not improvised after heat treatment.
Bearing seats, press fits, running clearances, concentricity and sealing finishes are identified, inspected and reported.
Heat treatment, plating and coating are coordinated through approved partners with CMTA responsible for the finished part.
The approved revision and process route are retained so batch ten matches batch one.
Where this stops
Material certificates are passed through from the supplier where you request them at order stage. CMTA does not issue its own material certification.
Precision engineering components are core to CMTA's work, with particular strength in turned and ground parts.
Carbon and alloy steels, case-hardening and through-hardening grades, stainless steels and non-ferrous materials are machined to the drawing specification. Development quantities, small batches and repeat production are all accepted, and the process route is planned for the quantity — so a single prototype and a repeat batch are each economical in their own way.
Every drawing carries dimensions of very different importance. We identify the ones that decide whether the assembly performs — bearing seats, press fits, running clearances, concentricity between diameters, the finish on sealing or sliding surfaces — and those are the features that get planned for, measured and reported.
It is a short list on most drawings. Knowing which items are on it is most of the job.
Most components follow a route of CNC turning or VMC machining, heat treatment where specified, then finish grinding on the diameters and faces carrying tight tolerances. Planning it before the first part is cut is what keeps grinding allowances, datums and hardness sequence consistent from the first piece to the last.
A first-off is inspected against the drawing and, if you wish, trialled in the assembly before the balance quantity is released. Repeat orders are manufactured against the same approved revision and route.
Dimensional and visual inspection is carried out during and after manufacture. Inspection reports for the agreed critical dimensions accompany delivery where requested, and material certificates are passed through when asked for at order stage. Finished components are protected against corrosion and handling damage, and marked so your receipt inspection is straightforward.
How it runs
Each stage produces something you can check, and the drawing approval stage is yours to control.
Critical dimensions, fits and finish identified; ambiguities raised with you before quotation.
Operations, allowances, treatment sequence and inspection points defined.
Turning and milling, coordinated heat treatment, then finish grinding.
Measured against the agreed list, protected against corrosion and handling damage.
Before you enquire
The inputs that make a useful review, plus the related pages worth reading first.
Send what you have. The technical review identifies the rest.
FAQ
The questions engineers and buyers ask before sending a drawing. If yours is not here, ask it directly — you will get an engineer's answer, not a brochure.
Still have a question?
Talk to Anita M.N, Managing Partner, or send the drawing and let the review answer it.
A drawing with its revision, the material specification, the quantity, the critical tolerances and finish, and any heat treatment or coating requirement. If only a sample exists, CMTA can develop the drawing through the reverse-engineering route first.
Yes. Single pieces and small batches are routine, and the route is retained so a later repeat order is manufactured the same way.
Machining, grinding, assembly and inspection are CMTA's own work. Where precision component manufacturing needs heat treatment, plating or coating, those are coordinated through approved partners and CMTA stays responsible for the finished part. The exact split for your job is confirmed in writing at feasibility review, not left vague.
Before manufacture, we list the dimensions, fits, finish and functional checks that actually decide whether the part works. Those are what get measured, reported and, where relevant, trialled on your machine. Acceptance is judged against that written list rather than a general assurance.
Start a project
Share what you are trying to make or fix. Our engineering team reviews every enquiry and responds with the questions that matter, a feasibility view and next steps.
