VT machining offers CNC Gear Hobbing for Q345 Steel (GB/T 1591 (now Q355) / ~S355JR), typically supplied hot-rolled. Chinese low-alloy high-strength steel; replaced by Q355 in GB/T 1591-2018.
CNC Gear Hobbing Notes for Q345 Steel
Gear teeth in Q345 Steel are cut to your accuracy class; heat treatment is optional depending on load.
Process Data for CNC Gear Hobbing Q345 Steel
| Heat-treat route | As specified on drawing |
|---|---|
| Accuracy as cut | ISO 1328 class 8-9 (AGMA 9-10) |
| Module range | 0.3-6 |
| Hobbing speed (HSS-E / carbide) | 45 / 150 m/min |
| Hob | HSS-E (PM) coated hob; carbide for dry hobbing |
| Gear types | External spur and helical, splines, worm wheels |
Typical values for Q345 Steel, Hot-rolled; confirmed on the first part.
Q345 Steel Data Relevant to CNC Gear Hobbing
| Equivalent designations | GB/T 1591 (now Q355) / ~S355JR |
|---|---|
| Typical supply condition | Hot-rolled |
| Hardness (typical) | ~150 HB |
| Tensile strength | 470-630 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.
No drawing yet? Sketch the part in our free 3D + 2D builder and send it with your RFQ.
Quoting CNC Gear Hobbing Q345 Steel
Send a STEP/IGES model or PDF drawing, confirm Q345 Steel and its condition (we usually see it supplied hot-rolled), the quantity, critical tolerances and any finish or certificate requirements.
Q345 Steel in Other Processes
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Send the drawing, the Q345 Steel condition and the quantity — pricing and lead time come back the same or next business day.
Request a QuoteFrequently Asked Questions
Does CNC Gear Hobbing Q345 Steel require dedicated tooling?
Most Q345 Steel gear cutting work uses standard cutting tools and CNC programs; dedicated fixtures are made only when geometry or volume requires them.
What surface finish is achievable on Q345 Steel with CNC Gear Hobbing?
Surface finish on Q345 Steel is controlled to your specification; we confirm the achievable Ra against your callout.
What is CNC Gear Hobbing Q345 Steel and how is it done?
CNC Gear Hobbing Q345 Steel refers to gear hobbing generates gear teeth with a rotating hob synchronized to the workpiece. Applied to Q345 Steel — strong, economical and widely available — VT machining produces each part to your CAD drawing, selecting parameters from your tolerance, finish and quantity requirements.
Why is Q345 Steel a good choice for CNC Gear Hobbing?
Q345 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 Q345 Steel gear cutting part meets your dimensional and functional requirements.
What tolerances can you hold for CNC Gear Hobbing Q345 Steel?
Achievable tolerances for Q345 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.
What is the typical lead time and minimum order for CNC Gear Hobbing Q345 Steel?
CNC Gear Hobbing prototypes for Q345 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.