VT machining offers CNC 4-Axis Machining for 420 Stainless Steel (UNS S42000 / 1.4021-1.4034), typically supplied annealed or hardened. Higher carbon than 410 reaches greater hardness; machined annealed then hardened.
CNC 4-Axis Machining Notes for 420 Stainless Steel
Multi-axis machining lets 420 Stainless Steel parts be completed in one or two setups, which improves feature-to-feature accuracy.
For estimating, a 100 × 100 × 10 mm block of 420 Stainless Steel weighs about 0.77 kg.
Starting Parameters for CNC 4-Axis Machining 420 Stainless Steel
| Cutting speed (carbide) | 95-175 m/min |
|---|---|
| Feed per tooth | 0.028-0.088 mm |
| Spindle speed, Ø10 mm end mill | 3020-5570 rpm |
| Insert / tool class | ISO M — positive-rake PVD/CVD carbide |
| Coolant | Flood emulsion (8-10%) or high-pressure coolant |
| Rotary positioning accuracy | ±10 arc-sec (≈ ±0.005 mm at Ø100 mm) |
Starting values for 420 Stainless Steel, Annealed or hardened; optimised on the first article.
Full material data for 420 Stainless Steel (UNS S42000 / 1.4021-1.4034) is on the CNC Milling 420 Stainless Steel page.
More on CNC 4-Axis Machining Stainless Steel
Finishing options, quality documentation and general cnc 4-axis machining guidance for all stainless steel grades are on our CNC 4-Axis Machining Stainless Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC 4-Axis Machining 420 Stainless Steel
Send a STEP/IGES model or PDF drawing, confirm 420 Stainless Steel and its condition (we usually see it supplied annealed or hardened), the quantity, critical tolerances and any finish or certificate requirements.
420 Stainless Steel in Other Processes
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Send the drawing, the 420 Stainless Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
What surface finish is achievable on 420 Stainless Steel with CNC 4-Axis Machining?
Surface finish on 420 Stainless Steel is controlled to your specification; we confirm the achievable Ra against your callout.
Can VT machining make custom 420 Stainless Steel parts to my drawing?
Yes. 420 Stainless Steel machining is made to order from your CAD/2D drawing. Share your geometry, material grade, tolerance and quantity and we will confirm feasibility, lead time and pricing.
What tolerances can you hold for CNC 4-Axis Machining 420 Stainless Steel?
Achievable tolerances for 420 Stainless Steel machining depend on the alloy, geometry and feature size. Milling holds positional and dimensional tolerances to around ±0.01 mm, tighter with precision setups. Exact figures are confirmed against your drawing callouts.
What is the typical lead time and minimum order for CNC 4-Axis Machining 420 Stainless Steel?
CNC 4-Axis Machining prototypes for 420 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.