VT machining offers CNC Swiss Machining for 440C Stainless Steel (UNS S44004 / 1.4125 / SUS440C), typically supplied annealed or hardened. Highest hardness/wear resistance of stainless; hardened parts are finish-ground.
CNC Swiss Machining Notes for 440C Stainless Steel
440C Stainless Steel can be Swiss-turned, but slower cutting data and guide-bushing clearances are set for this grade to protect slender features.
For estimating, a 100 × 100 × 10 mm block of 440C Stainless Steel weighs about 0.77 kg.
Starting Parameters for CNC Swiss Machining 440C Stainless Steel
| Cutting speed (carbide) | 95-175 m/min |
|---|---|
| Feed | 0.08-0.25 mm/rev |
| Spindle speed, Ø8 mm bar | 3780-6960 rpm |
| Insert / tool class | ISO M — positive-rake PVD/CVD carbide |
| Coolant | Flood emulsion (8-10%) or high-pressure coolant |
| Length-to-diameter capability | up to ~10:1 (slower feeds for this grade) |
Starting values for 440C Stainless Steel, Annealed or hardened; optimised on the first article.
Full material data for 440C Stainless Steel (UNS S44004 / 1.4125 / SUS440C) is on the CNC Turning 440C Stainless Steel page.
More on CNC Swiss Machining Stainless Steel
Finishing options, quality documentation and general cnc swiss machining guidance for all stainless steel grades are on our CNC Swiss Machining Stainless Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Swiss Machining 440C Stainless Steel
Send a STEP/IGES model or PDF drawing, confirm 440C Stainless Steel and its condition (we usually see it supplied annealed or hardened), the quantity, critical tolerances and any finish or certificate requirements.
440C Stainless Steel in Other Processes
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Send the drawing, the 440C Stainless Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
Why is 440C Stainless Steel a good choice for CNC Swiss Machining?
440C Stainless Steel is corrosion resistant, strong and hygienic, which makes it well suited to CNC Swiss Machining. We tune the process to the alloy so the finished 440C Stainless Steel turning part meets your dimensional and functional requirements.
What surface finish is achievable on 440C Stainless Steel with CNC Swiss Machining?
Surface finish on 440C Stainless Steel is controlled to your specification; we confirm the achievable Ra against your callout.
What is the typical lead time and minimum order for CNC Swiss Machining 440C Stainless Steel?
CNC Swiss Machining prototypes for 440C Stainless Steel can be produced quickly and scaled to series production. Send your drawing and quantity and we will advise lead time and any minimum order.
What material thickness or size range suits CNC Swiss Machining 440C Stainless Steel?
Turned 440C Stainless Steel parts are produced from bar or chuck stock across a wide diameter range.
What tolerances can you hold for CNC Swiss Machining 440C Stainless Steel?
Achievable tolerances for 440C Stainless Steel turning depend on the alloy, geometry and feature size. Turning holds diameter tolerances to around ±0.005 mm with concentricity within 0.01 mm. Exact figures are confirmed against your drawing callouts.
Does CNC Swiss Machining 440C Stainless Steel require dedicated tooling?
Most 440C Stainless Steel turning work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.