CNC Polishing Invar is a core capability at VT machining. We combine controlled finishing with material-aware setup for Invar — an alloy that is ultra-low thermal expansion — to produce parts that meet your specification first time.
CNC Polishing Capability for Invar
- Mirror finish capable
- Ra to 0.05 µm
- Cosmetic & sealing faces
- Multi-stage abrasives
How CNC Polishing Invar Works
Abrasive media or tooling refine the Invar surface in controlled stages, removing the previous step's marks until the target roughness and edge condition are reached.
Every job begins from your CAD model or 2D drawing. Fixturing and tool paths are planned so the most critical dimensions are produced in the most rigid, repeatable setup. Critical dimensions are checked on the first part and monitored through the run.
Working with Invar
Invar offers a useful combination of properties: it is ultra-low thermal expansion. Those characteristics shape how we approach finishing — from tool and parameter selection to work-holding and coolant.
If your application is sensitive to alloy condition, we agree the specification in writing and document it. Stock is sourced from reputable suppliers so what you order is what you receive.
CNC Polishing Tolerances & Surface Finish
Finishing brings Invar to a defined roughness target — from a uniform satin to Ra values as low as 0.05 µm — with controlled, repeatable edge breaks.
Final tolerances are governed by the material's behaviour, wall thickness and overall stiffness. We give honest DFM feedback if a callout would be costly or better achieved another way.
Design Tips for CNC Polishing Invar
A few design choices make a real difference to cost and quality. Telling us the target Ra, the cosmetic faces and any masking needs lets us finish Invar efficiently without over-processing. If you send your model early, we will return practical DFM feedback before you commit to production.
CNC Polishing Quality & Inspection
Consistent quality comes from disciplined process control. Critical dimensions on Invar parts are checked in-process and verified at final inspection using calibrated instruments and, where required, CMM measurement. Full documentation — dimensional reports, mill certs, FAIR — is available when your programme needs it.
Secondary Operations & Finishing
We complete Invar components with the secondary steps your drawing calls for. We arrange heat treatment, surface treatment, marking and assembly as needed. Tell us the final spec and we will plan the full route so parts arrive ready to use.
Applications of CNC Polishing Invar
CNC Polishing of Invar supports parts across aerospace, medical, automotive, electronics, semiconductor, energy and general industrial sectors. We scale from one-off prototypes to ongoing production while holding the same quality.
How to Order CNC Polishing Invar
Ordering Invar parts is straightforward. Provide the drawing, material, quantity and any certification needs. Our engineers reply — in English — with feasibility, pricing and a realistic lead time, usually within one business day.
Other Metals for CNC Polishing
Other Processes for Invar
Need CNC Polishing Invar for your project? Send your drawing and quantity for a fast quotation.
Request a QuoteFrequently Asked Questions
What is CNC Polishing Invar and how is it done?
CNC Polishing Invar refers to cNC polishing refines surfaces to a smooth, reflective finish for cosmetic and functional needs. Applied to Invar — ultra-low thermal expansion — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
Which industries use CNC Polishing Invar parts?
CNC Polishing Invar parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise Invar components are required.
Why is Invar a good choice for CNC Polishing?
Invar is ultra-low thermal expansion, which makes it well suited to CNC Polishing. We tune the process to the alloy so the finished Invar finishing part meets your dimensional and functional requirements.
Does CNC Polishing Invar require dedicated tooling?
Most Invar finishing work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
What surface finish is achievable on Invar with CNC Polishing?
Our finishing processes refine Invar surfaces to Ra values as low as 0.05 µm for cosmetic or sealing faces.
How clean are the edges produced by CNC Polishing on Invar?
Our deburring leaves Invar with a consistent, controlled edge break and burr-free surfaces.