VT machining offers CNC Gear Hobbing for 42CrMo Steel (GB/T 3077 / ~4140 / 42CrMo4), typically supplied Q&T. Chinese equivalent of 4140/42CrMo4.
CNC Gear Hobbing Notes for 42CrMo Steel
Gear teeth in 42CrMo Steel are cut to your accuracy class; heat treatment is optional depending on load.
Process Data for CNC Gear Hobbing 42CrMo 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) | 35 / 115 m/min |
| Hob | HSS-E (PM) coated hob; carbide for dry hobbing |
| Gear types | External spur and helical, splines, worm wheels |
Typical values for 42CrMo Steel, Q&T; confirmed on the first part.
42CrMo Steel Data Relevant to CNC Gear Hobbing
| Equivalent designations | GB/T 3077 / ~4140 / 42CrMo4 |
|---|---|
| Typical supply condition | Q&T |
| Hardness (typical) | ~28-32 HRC |
| Tensile strength | ~1080 Q&T MPa |
Typical values; we work to your drawing and mill certificate.
More on CNC Gear Hobbing Steel
Finishing options, quality documentation and general cnc gear hobbing guidance for all steel grades are on our CNC Gear Hobbing Steel page.
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Quoting CNC Gear Hobbing 42CrMo Steel
Send a STEP/IGES model or PDF drawing, confirm 42CrMo Steel and its condition (we usually see it supplied Q&T), the quantity, critical tolerances and any finish or certificate requirements.
42CrMo Steel in Other Processes
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Send the drawing, the 42CrMo Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
What gear accuracy class can you achieve on 42CrMo Steel?
Gear accuracy is specified to DIN/AGMA classes appropriate to the application. Profile and lead are controlled so 42CrMo Steel gears run accurately and quietly under load.
What is CNC Gear Hobbing 42CrMo Steel and how is it done?
CNC Gear Hobbing 42CrMo Steel refers to gear hobbing generates gear teeth with a rotating hob synchronized to the workpiece. Applied to 42CrMo Steel — strong, economical and widely available — 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 Gear Hobbing 42CrMo Steel?
Achievable tolerances for 42CrMo Steel gear cutting depend on the alloy, geometry and feature size. We hold tight, repeatable tolerances appropriate to the feature and material. Exact figures are confirmed against your drawing callouts.
Why is 42CrMo Steel a good choice for CNC Gear Hobbing?
42CrMo Steel is strong, economical and widely available, which makes it well suited to CNC Gear Hobbing. We tune the process to the alloy so the finished 42CrMo Steel gear cutting part meets your dimensional and functional requirements.