SUPPLY SPECIFICATION
What We Supply
Sizes, grades, mills and tolerances for our gear blanks range.
| Sizes | Grade families | Make / mill | Tolerance | Testing |
|---|---|---|---|---|
|
|
Forged through our partners, including ABS (Italy) and Parbhat Heavy Forge, and machined through our component partners. | Machining allowance and dimensions to your drawing | Mill certificate · Chemistry · Hardness · UT as specified |
Processing on Gear Blanks
OneKaizen's forging partners forge the blank and our machine-shop partners rough machine it to your drawing. We heat treat it to the condition your gear cutter needs and inspect it before it ships.
| Processing route | Typical scope | Output / control |
|---|---|---|
| Forging | Gear blank stock, through our forging partners | Reduction · stock allowance |
| Heat treatment | Normalised or annealed for gear cutting | Hardness · structure |
| Rough machining | Through our partner machine shops | OD · bore · face |
| Inspection | Your drawing | Dimensions · hardness · UT as specified |
How We Make Gear Blanks
- 1
Review the drawing
We check OD, bore, face width, grade, condition and the machining allowance for your gear process.
Sourcing team - 2
Source the grade
We select the case-hardening steel and the forge that suits your blank size.
Sourcing team - 3
Forge
The blank is forged as a disc, ring or block with allowance for machining.
Partner forge - 4
Heat treat
Normalising or annealing for a uniform structure and stable gear cutting.
In-house / partner forge - 5
Rough machine
Turning to your OD, bore and face dimensions, leaving the finishing stock you specify.
Partner machine shop - 6
Inspect and deliver
Dimensions, hardness and certificate check, then packed and shipped to your plant.
Quality team
Grades We Supply in Gear Blanks
OneKaizen's main gear blank grades, with their nearest equivalents. Send us any other grade on your drawing.
| Family | Grades |
|---|---|
| Case-Hardening Steel | SAE 8620 / 20NiCrMo2-216MnCr5 / 1.713120MnCr5 / 1.714718CrNiMo7-6 / 1.6587EN353EN36 / 1.5752EN39BEN362 / SAE 8620 + 27 more |
Quality, Packing and Delivery
Quality
Mill certificate with chemistry and hardness, heat-number traceability, and dimensional inspection against your drawing. UT as specified.
Packing
Blanks are oiled or VCI-wrapped, stacked on pallets and tagged with grade, size and heat number.
Delivery
To your plant anywhere in India by road. Export packing and documents for buyers abroad.
Applications
Gear Blanks Questions
What do you need to quote a gear blank?
Send the drawing, grade, blank dimensions, quantity, required condition, inspection documents and delivery destination. We quote from those.
Do you cut gear teeth?
No. OneKaizen supplies the forged and machined blank ready for gear cutting. Teeth are cut by you or your gear cutter.
What sizes of gear blanks do you supply?
From 100 to 1,000 mm outside diameter, with bore and face width to your drawing.
Which grade is used for gear blanks, 20MnCr5 or 18CrNiMo7-6?
20MnCr5 suits most automotive and general gears. 18CrNiMo7-6 gives a tougher core for heavy, highly loaded gears and deeper case depths.
Is 20MnCr5 the same as SAE 8620?
They are close equivalents, not identical. 20MnCr5 has more manganese and chromium, and less nickel and molybdenum, than SAE 8620. Check critical gears with our team.
Do you machine the blanks in-house?
No. OneKaizen machines through our partner machine shops and forges through our forging partners. We heat treat in-house or through the partner and inspect every lot.
Can you supply blanks forged and normalised?
Yes. OneKaizen supplies gear blanks normalised or annealed to the hardness your gear cutter needs. Tell us the target hardness range.
Do you deliver gear blanks across India and for export?
Yes. OneKaizen delivers to plants across India and exports to buyers abroad with export packing and documents.
Sizes, grades and tolerances above are our standard range. Other sizes and grades are available on request. Final values are confirmed against your drawing and the mill certificate.
