01
Customer and operating context
Castcraft required a stainless steel shaft manufactured to drawing for an application where ground diameters, concentricity and surface finish were critical to assembly and operation.
Case study
A material that fights back in both turning and grinding
Stainless work-hardens under the tool and loads grinding wheels differently from carbon steel. Holding size, roundness and finish on the ground diameters is a process-planning problem before it is a machining one.
- Stainless steel
- Ground diameters
- Allowances planned for the material
Best for
Ground components in materials that resist easy machining
You send
Drawing, material and the features that must be ground
You get back
Components with ground features measured and reported
How it starts
Allowances and parameters planned for the material
02
The technical challenge
Stainless steel work-hardens in turning and loads grinding wheels differently from carbon steel. Holding size, roundness and finish on the ground diameters required the allowances and parameters to be planned for the material rather than carried over from routine work.
03
Constraints and acceptance requirements
- Material behaviour in both turning and grinding
- Concentricity between the ground diameters
- Surface finish on the functional surfaces
- Inspection to drawing before dispatch
04
Assessment and route
The drawing was reviewed, grinding allowances set for the material, and turning and grinding parameters planned to manage heat and wheel loading.
05
Execution and verification
The shaft was turned with the planned allowances and finish ground on the critical diameters, with in-process measurement. Ground features were inspected for size, roundness and finish against the drawing, documented as required, then dispatched with protection against handling damage.
06
Result
The shaft was delivered to drawing. Data on tolerances achieved, turnaround and repeat orders is published only after Castcraft confirmation.
07
What made it work
- Allowances and parameters chosen for stainless rather than defaulted
- Grinding planned into the route from the start
- Inspection focused on the features that mattered
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
- Castcraft
- Industry
- General Engineering
- Capability
- Precision Grinding and Finishing
- Publication
- Customer approved
Outcome
The stainless steel shaft delivered to the required ground finish after other vendors could not, so sub-assembly restarted without further delay.
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 a stainless steel shaft with ground diameters held to size, roundness and finish, in a material that makes both turning and grinding more demanding.
What did CMTA manufacture?
A stainless steel shaft machined and precision 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 ground shafts and 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.