VT machining offers CNC Cylindrical Grinding 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 Cylindrical Grinding Notes for 420 Stainless Steel
420 Stainless Steel is ground with aluminium-oxide or CBN wheels chosen for its hardness (Up to ~50 HRC).
Process Data for CNC Cylindrical Grinding 420 Stainless Steel
| Wheel (supply condition) | Aluminium oxide (white/ceramic), soft grade |
|---|---|
| Wheel (hardened to ~50 HRC) | CBN or ceramic aluminium oxide |
| Depth per pass (rough / finish) | 0.005-0.015 / 0.002-0.005 mm |
| Achievable finish | Ra 0.1-0.2 µm |
| Typical size tolerance | Ø ±0.002 mm, roundness 0.001-0.002 mm |
| Diameter growth, Ø50 mm, +3 °C | 1.5 µm |
| Work speed | 15-30 m/min (between centres) |
Typical values for 420 Stainless Steel, Annealed or hardened; confirmed on the first part.
Full material data for 420 Stainless Steel (UNS S42000 / 1.4021-1.4034) is on the CNC Surface Grinding 420 Stainless Steel page.
More on CNC Cylindrical Grinding Stainless Steel
Finishing options, quality documentation and general cnc cylindrical grinding guidance for all stainless steel grades are on our CNC Cylindrical Grinding Stainless Steel page.
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Quoting CNC Cylindrical Grinding 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 is CNC Cylindrical Grinding 420 Stainless Steel and how is it done?
CNC Cylindrical Grinding 420 Stainless Steel refers to cylindrical grinding finishes outer diameters of rotational parts to precise size and roundness. Applied to 420 Stainless Steel — corrosion resistant, strong and hygienic — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
Why is 420 Stainless Steel a good choice for CNC Cylindrical Grinding?
420 Stainless Steel is corrosion resistant, strong and hygienic, which makes it well suited to CNC Cylindrical Grinding. We tune the process to the alloy so the finished 420 Stainless Steel grinding part meets your dimensional and functional requirements.
What surface finish is achievable on 420 Stainless Steel with CNC Cylindrical Grinding?
Grinding can take 420 Stainless Steel to a fine finish — typically Ra 0.1–0.4 µm, and to a mirror grade on suitable alloys.
What tolerances can you hold for CNC Cylindrical Grinding 420 Stainless Steel?
Achievable tolerances for 420 Stainless Steel grinding depend on the alloy, geometry and feature size. Grinding routinely holds single-micron tolerances on diameter, flatness and parallelism. Exact figures are confirmed against your drawing callouts.
What is the typical lead time and minimum order for CNC Cylindrical Grinding 420 Stainless Steel?
CNC Cylindrical Grinding 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.
Does CNC Cylindrical Grinding 420 Stainless Steel require dedicated tooling?
Most 420 Stainless Steel grinding work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.