VT machining offers CNC Reaming for 309S Stainless Steel (UNS S30908 / 1.4833), typically supplied annealed. Low-carbon 309 for better weldability in high-temperature fabrications.
CNC Reaming Notes for 309S Stainless Steel
309S Stainless Steel can rub and close up behind the reamer, so we leave a consistent stock allowance and keep the reamer cutting rather than burnishing.
For estimating, a 100 × 100 × 10 mm block of 309S Stainless Steel weighs about 0.79 kg.
Starting Parameters for CNC Reaming 309S Stainless Steel
| Cutting speed (carbide) | 25-50 m/min |
|---|---|
| Stock allowance on Ø10 mm | 0.15-0.25 mm |
| Feed | 0.12-0.4 mm/rev |
| Spindle speed, Ø10 mm | 800-1590 rpm |
| Insert / tool class | ISO M — positive-rake PVD/CVD carbide |
| Coolant | Flood emulsion (8-10%) or high-pressure coolant |
Starting values for 309S Stainless Steel, Annealed; optimised on the first article.
Full material data for 309S Stainless Steel (UNS S30908 / 1.4833) is on the CNC Milling 309S Stainless Steel page.
More on CNC Reaming Stainless Steel
Finishing options, quality documentation and general cnc reaming guidance for all stainless steel grades are on our CNC Reaming Stainless Steel page.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Reaming 309S Stainless Steel
Send a STEP/IGES model or PDF drawing, confirm 309S Stainless Steel and its condition (we usually see it supplied annealed), the quantity, critical tolerances and any finish or certificate requirements.
309S Stainless Steel in Other Processes
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Send the drawing, the 309S 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 Reaming 309S Stainless Steel and how is it done?
CNC Reaming 309S Stainless Steel refers to reaming finishes drilled holes to a precise diameter and smooth surface in a single controlled pass. Applied to 309S 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.
What tolerances can you hold for CNC Reaming 309S Stainless Steel?
Achievable tolerances for 309S 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 Reaming 309S Stainless Steel?
CNC Reaming prototypes for 309S 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.
Why is 309S Stainless Steel a good choice for CNC Reaming?
309S Stainless Steel is corrosion resistant, strong and hygienic, which makes it well suited to CNC Reaming. We tune the process to the alloy so the finished 309S Stainless Steel machining part meets your dimensional and functional requirements.