VT machining offers CNC Tapping for 8620 Alloy Steel (UNS G86200 / 20NiCrMo2-2 / SNCM220), typically supplied annealed, then carburised. Carburising steel: tough core with hard case.
CNC Tapping Notes for 8620 Alloy Steel
8620 Alloy Steel is tapped with cut taps (spiral-point for through holes) and controlled rigid-tapping speed; thread milling is used where tap breakage would be costly.
For estimating, a 100 × 100 × 10 mm block of 8620 Alloy Steel weighs about 0.79 kg.
Starting Parameters for CNC Tapping 8620 Alloy Steel
| Cutting speed (carbide) | 10-20 m/min |
|---|---|
| Recommended tap | Form (roll) tap — chipless |
| Tap drill for M8×1.25 | Ø7.4 mm (form tap) |
| Spindle speed, M8 | 400-800 rpm |
| Insert / tool class | ISO P — CVD-coated carbide |
| Coolant | Emulsion (6-8%) |
Starting values for 8620 Alloy Steel, Annealed, then carburised; optimised on the first article.
Full material data for 8620 Alloy Steel (UNS G86200 / 20NiCrMo2-2 / SNCM220) is on the CNC Milling 8620 Alloy Steel page.
More on CNC Tapping Alloy Steel
Finishing options, quality documentation and general cnc tapping guidance for all alloy steel grades are on our CNC Tapping Alloy Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Tapping 8620 Alloy Steel
Send a STEP/IGES model or PDF drawing, confirm 8620 Alloy Steel and its condition (we usually see it supplied annealed, then carburised), the quantity, critical tolerances and any finish or certificate requirements.
8620 Alloy Steel in Other Processes
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Send the drawing, the 8620 Alloy 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 8620 Alloy Steel with CNC Tapping?
Surface finish on 8620 Alloy Steel is controlled to your specification; we confirm the achievable Ra against your callout.
Can VT machining make custom 8620 Alloy Steel parts to my drawing?
Yes. 8620 Alloy 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 is CNC Tapping 8620 Alloy Steel and how is it done?
CNC Tapping 8620 Alloy Steel refers to rigid CNC tapping cuts internal threads in sync with spindle feed for precise, repeatable thread engagement. Applied to 8620 Alloy Steel — high-strength and hardenable — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
Why is 8620 Alloy Steel a good choice for CNC Tapping?
8620 Alloy Steel is high-strength and hardenable, which makes it well suited to CNC Tapping. We tune the process to the alloy so the finished 8620 Alloy Steel machining part meets your dimensional and functional requirements.
What is the typical lead time and minimum order for CNC Tapping 8620 Alloy Steel?
CNC Tapping prototypes for 8620 Alloy 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 tolerances can you hold for CNC Tapping 8620 Alloy Steel?
Achievable tolerances for 8620 Alloy 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.