VT machining offers CNC Tapping for 347 Stainless Steel (UNS S34700 / 1.4550), typically supplied annealed. Niobium-stabilised alternative to 321, better for welded high-temperature service.
CNC Tapping Notes for 347 Stainless Steel
347 Stainless 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 347 Stainless Steel weighs about 0.80 kg.
Starting Parameters for CNC Tapping 347 Stainless Steel
| Cutting speed (carbide) | 5-10 m/min |
|---|---|
| Recommended tap | Form (roll) tap — chipless |
| Tap drill for M8×1.25 | Ø7.4 mm (form tap) |
| Spindle speed, M8 | 200-400 rpm |
| Insert / tool class | ISO M — positive-rake PVD/CVD carbide |
| Coolant | Flood emulsion (8-10%) or high-pressure coolant |
Starting values for 347 Stainless Steel, Annealed; optimised on the first article.
Full material data for 347 Stainless Steel (UNS S34700 / 1.4550) is on the CNC Milling 347 Stainless Steel page.
More on CNC Tapping Stainless Steel
Finishing options, quality documentation and general cnc tapping guidance for all stainless steel grades are on our CNC Tapping Stainless Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Tapping 347 Stainless Steel
Send a STEP/IGES model or PDF drawing, confirm 347 Stainless Steel and its condition (we usually see it supplied annealed), the quantity, critical tolerances and any finish or certificate requirements.
347 Stainless Steel in Other Processes
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Send the drawing, the 347 Stainless Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
Can VT machining make custom 347 Stainless Steel parts to my drawing?
Yes. 347 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.
Does CNC Tapping 347 Stainless Steel require dedicated tooling?
Most 347 Stainless Steel machining work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
What is CNC Tapping 347 Stainless Steel and how is it done?
CNC Tapping 347 Stainless Steel refers to rigid CNC tapping cuts internal threads in sync with spindle feed for precise, repeatable thread engagement. Applied to 347 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 347 Stainless Steel a good choice for CNC Tapping?
347 Stainless Steel is corrosion resistant, strong and hygienic, which makes it well suited to CNC Tapping. We tune the process to the alloy so the finished 347 Stainless Steel machining part meets your dimensional and functional requirements.