CNC Gear Cutting Alloy Steel from VT machining delivers precision Alloy Steel parts produced to your exact drawing. CNC gear cutting forms precise tooth profiles for spur, helical, bevel and worm gears, and we tune every parameter to the behaviour of Alloy Steel, which is high strength and hardenability for demanding parts.
Process Data for CNC Gear Cutting Alloy Steel
| Heat-treat route | Induction or nitride harden |
|---|---|
| Accuracy as cut | ISO 1328 class 8-9 (AGMA 9-10) |
| Module range | 0.3-6 |
| Hobbing speed (HSS-E / carbide) | 40 / 130 m/min |
| Methods | Gear shaping (internal), form milling, skiving |
| Gear types | Internal gears, bevel, racks, cluster gears |
Shown for 4140 Alloy Steel, the most common Alloy Steel grade we see for CNC Gear Cutting. Typical values for 4140 Alloy Steel, Annealed or pre-hardened (28-32 HRC); confirmed on the first part.
CNC Gear Cutting Capability for Alloy Steel
- Multiple gear types
- Profile accuracy class
- Custom modules
- Hardened-blank ready
Alloy Steel material properties, finishing options and grade notes are on our CNC Gear Hobbing Alloy Steel page.
How CNC Gear Cutting Alloy Steel Works
Tooth profiles are generated in the Alloy Steel blank by a synchronised cutter, then refined to the required accuracy class. Module, pressure angle and helix are programmed from your gear data.
Every job begins from your CAD model or 2D drawing. Fixturing and tool paths are planned so the most critical dimensions are produced in the most rigid, repeatable setup. Critical dimensions are checked on the first part and monitored through the run.
Achievable Tolerances for CNC Gear Cutting Alloy Steel
| Feature | Standard | Precision |
|---|---|---|
| Accuracy class | DIN 8 / AGMA 10 | DIN 6 / AGMA 12 |
| Profile deviation | 0.020 mm | 0.008 mm |
| Lead deviation | 0.020 mm | 0.008 mm |
| Pitch deviation (cumulative) | 0.040 mm | 0.015 mm |
| Runout | 0.030 mm | 0.010 mm |
| Tooth surface finish | Ra 1.6 µm | Ra 0.4 µm (ground) |
| Module range | m0.5–m8 | m1–m6 |
Standard is what a normal quotation assumes. Precision is available on nominated features and is priced separately, because it needs extra setups, in-process gauging and CMM verification. Call out only the features that need it — blanket-tightening a drawing is the single most common reason a quote comes back expensive.
CNC Gear Cutting Tolerances & Surface Finish
Gear features are produced to a specified DIN/AGMA accuracy class, with profile and lead controlled for quiet, durable running under load.
Final tolerances are governed by the material's behaviour, wall thickness and overall stiffness. We give honest DFM feedback if a callout would be costly or better achieved another way.
Design Tips for CNC Gear Cutting Alloy Steel
A few design choices make a real difference to cost and quality. Providing complete gear data (module, pressure angle, profile shift, quality class) lets us produce Alloy Steel gears right the first time. If you send your model early, we will return practical DFM feedback before you commit to production.
Applications of CNC Gear Cutting Alloy Steel
CNC Gear Cutting of Alloy Steel supports parts across aerospace, medical, automotive, electronics, semiconductor, energy and general industrial sectors. We scale from one-off prototypes to ongoing production while holding the same quality.
Typical Alloy Steel Parts for CNC Gear Cutting
Illustrative examples of CNC Gear Cutting Alloy Steel parts and the callouts that usually drive the process plan. They show the kind of work that fits this process; they are not specific customer orders.
Worm and wheel set
- Material
- Alloy Steel
- Size
- m3, single start
- Key callouts
- Backlash 0.05–0.10 mm as a matched pair
- Batch
- 120 sets
Supplied as matched sets and marked, because mixing pairs loses the backlash spec.
Internal ring gear
- Material
- Alloy Steel
- Size
- m2.5, z72, ID 190 mm
- Key callouts
- DIN 8, pitch deviation 0.03 mm
- Batch
- 150 pcs
Shaped rather than hobbed — an internal gear leaves no room for a hob to run out.
Bevel gear pair
- Material
- Alloy Steel
- Size
- m2, z20/z40, 90° axes
- Key callouts
- DIN 8, mounting distance ±0.03 mm
- Batch
- 200 sets
Contact pattern checked on a rolling tester before release.
No drawing yet? Build one in the browser.
Set the metal, dimensions and features, watch the 3D model update as you type, then switch to the 2D sheet to add dimensions and tolerances. Download it or send it straight to us with your RFQ.
What We Need to Quote CNC Gear Cutting Alloy Steel
- GeometrySTEP or IGES for the 3D model, plus a PDF drawing if you have tolerance callouts. A dimensioned sketch is enough to start.
- MaterialThe exact Alloy Steel grade and condition — temper, heat-treat state or hardness. If you are not sure, tell us the function and we will suggest one.
- QuantityPrototype count and the expected annual volume. Both change how the part is made and therefore what it costs.
- TolerancesWhich features are critical. Everything else runs to our standard tolerance, which is what keeps the price sensible.
- FinishSurface treatment, cosmetic requirements, and any faces that must be masked.
- DocumentsWhether you need a material certificate, dimensional report, FAIR or PPAP with the shipment.
Missing something from the list is not a problem — send what you have. We will come back with the specific questions rather than a generic form.
Other Metals for CNC Gear Cutting
Other Processes for Alloy Steel
Send the drawing, the Alloy Steel grade and the quantity. You get pricing, lead time and any DFM notes back — usually within one business day.
Request a QuoteFrequently Asked Questions
Does CNC Gear Cutting Alloy Steel require dedicated tooling?
Most Alloy Steel gear cutting work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
Can VT machining make custom Alloy Steel parts to my drawing?
Yes. Alloy Steel gear cutting 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 gear accuracy class can you achieve on Alloy Steel?
Gear accuracy is specified to DIN/AGMA classes appropriate to the application. Profile and lead are controlled so Alloy Steel gears run accurately and quietly under load.
Why is Alloy Steel a good choice for CNC Gear Cutting?
Alloy Steel is high strength and hardenability for demanding parts, which makes it well suited to CNC Gear Cutting. We tune the process to the alloy so the finished Alloy Steel gear cutting part meets your dimensional and functional requirements.
What is the typical lead time and minimum order for CNC Gear Cutting Alloy Steel?
CNC Gear Cutting prototypes for 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 surface finish is achievable on Alloy Steel with CNC Gear Cutting?
Surface finish on Alloy Steel is controlled to your specification; we confirm the achievable Ra against your callout.