01
Customer and operating context
HMT Machine Tools, the machine tool builder to which CMTA is an ancillary, requiring sleeves for machine assemblies made to its own drawings and inspected to its acceptance standards.
Case study
Ground sleeves for assemblies that cannot be hand-fitted
Sleeves made to HMT drawings for machine tool assemblies, where the relationship between bore and outer diameter is what decides whether the assembly performs.
- Machine tool OEM
- Ground bore and outer diameter
- Inspection to drawing
Best for
Ground components for machine assemblies and field spares
You send
Drawings, revision and the assembly context
You get back
Components made to revision with fits inspected
How it starts
Route planned around the ground features
02
The technical challenge
Sleeves with ground bores and outer diameters, controlled concentricity, and fits suited to press or running conditions in the assembly — in the mixed quantities that machine building generates rather than in production runs.
03
Constraints and acceptance requirements
- Manufacture to OEM drawing under revision control
- Concentricity held between bore and outer diameter
- Heat treatment completed before finish grinding
- Inspection report on the critical dimensions
04
Assessment and route
The drawings were reviewed for critical features and a route planned: turning with grinding allowances, heat treatment coordinated through approved partners, then finish grinding of bore and outer diameter.
05
Execution
Sleeves were turned, hardened and finish ground, with in-process checks between operations to hold the allowances through the treatment stage.
06
Verification and delivery
Final inspection of size, concentricity and finish against the drawing, with documentation supplied as required.
07
Result
Sleeves supplied to drawing for assembly. Quantities, turnaround and rejection data are published only after HMT confirmation.
08
What made it work
- The route planned around the ground features from the start
- Allowances held through heat treatment
- Inspection tied to the drawing's critical dimensions
- Repeat supply against the same approved revision
Before you enquire
What to send, and where to look next
The inputs that make a useful review, plus the related pages worth reading first.
- Customer
- HMT Machine Tools
- Industry
- Machine Tool Manufacturers
- Capability
- Precision Component Manufacturing
- Publication
- Customer approved
Outcome
Precision machined sleeves supplied after other vendors could not match the specification, completing assembly of all ten machines and letting HMT dispatch on schedule.
FAQ
Frequently asked questions
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.
What problem was the customer facing?
The need for ground sleeves manufactured reliably to OEM drawings, in machine-building quantities, with documented inspection.
What did CMTA manufacture?
Precision sleeves turned, heat treated and finish ground to drawing, inspected and documented.
How was the result verified?
Through inspection against the approved drawing and trial or fitment at the customer, with results recorded. Quantified outcomes are published on this page only once the customer has confirmed the figures — which is why you will not find percentages here yet.
Can CMTA assess a similar requirement?
Yes. Send your drawing, sample or problem statement for precision components and the review follows the same process described on this page.
Start a project
Send us your drawing, sample or problem statement
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.