Capability
Internal and external cylindrical grinding of shafts, sleeves, bushes and holder features, with clear ownership of every step in the finishing chain and no ambiguity about who holds the allowance.
Best for
Ground fits, concentricity and finish that decide assembly function
You send
Drawing or sample, material condition and the features to be ground
You get back
Ground components measured on size, roundness and finish
How it starts
Allowance and condition confirmed before the job is accepted
The situation
Most grinding disputes trace back to something agreed too loosely at the start: what condition the part arrived in, and how much material was actually there to remove.
What you get
Cylindrical grinding and coordinated finishing with verified results on the features that matter.
When you supply pre-machined or hardened parts, we confirm the allowance and condition before accepting the job — so the finished size is actually achievable.
Hardening before finish grinding, coatings applied to correct finished dimensions, allowances planned into the turning operation.
Ground diameters and bores measured for size, with roundness and finish checked against the drawing requirement.
Worn shafts, sleeves and bushes assessed for grinding to a new size with a matching mating part, or sleeving, before you scrap them.
Where this stops
Heat treatment, plating and coating are performed by approved partners, with CMTA specifying the requirement, controlling the sequence and inspecting the result.
Precision cylindrical grinding job work is one of CMTA's established services. External grinding covers shafts, spindles, arbors and mandrels. Internal grinding covers sleeves, bushes, liners and bores in holders and adaptors where concentricity to an outer diameter is what makes the part work.
Grinding requirements come from function: the size band, roundness and cylindricity that keep a bearing or bush running true, and the surface finish a seal or sliding fit requires. These are agreed from the drawing and measured on the finished part rather than assumed from the process.
When CMTA machines the part, grinding allowances are planned into the turning operation with the expected heat-treatment distortion in mind. When you supply pre-machined or hardened parts, we confirm the allowance and condition before accepting the job — the alternative is discovering mid-grind that the finished size cannot be reached.
Heat treatment, plating and coating are coordinated through approved partners. CMTA manages the sequence so hardening happens before finish grinding and coatings are applied to the correct finished dimensions.
Worn or damaged shafts, sleeves and bushes can sometimes be recovered by grinding to a new size with a matching mating part, or by sleeving. Feasibility is confirmed from the sample and the assembly drawing before any work starts, so you know early whether recovery or replacement is the better call.
How it runs
Each stage produces something you can check, and the drawing approval stage is yours to control.
Drawing or sample reviewed; material condition and available allowance confirmed.
Grinding allowance, datums and treatment sequence set for the material.
Internal and external cylindrical grinding with in-process measurement.
Size, roundness and finish checked and reported as agreed.
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 or sample showing the ground features, the material and its condition, diameter and length, the tolerance, roundness and finish required, and the quantity. Tell us whether parts arrive pre-machined and hardened or need to be made complete.
Yes, subject to confirming the grinding allowance and material condition before the job is accepted — that check protects both of us.
Machining, grinding, assembly and inspection are CMTA's own work. Where grinding and finishing 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.
