Forged Pinions & Pinion Shafts
A pinion is a shaft and a gear in one part, which means it must resist torsional fatigue along its length and contact fatigue at its teeth. Integrally forging the head and shank avoids the joint that a two-piece design would have to trust.
- Shank Diameter
- 20 mm – 120 mm
- Head Diameter
- 40 mm – 250 mm
- Materials
- 20MnCr5, 16MnCr5, EN353
- Supply Condition
- Normalised or annealed
- Blank Type
- Near-net upset head
- Applications
- Differentials, reducers, tractors
Forged Pinions & Pinion Shafts at a glance
Quotable facts from Avadh Techno Forge, Gundasara, Gondal, Rajkot.
- Shank Diameter: 20 mm – 120 mm
- Head Diameter: 40 mm – 250 mm
- Materials: 20MnCr5, 16MnCr5, EN353
- Supply Condition: Normalised or annealed
- Blank Type: Near-net upset head
- Applications: Differentials, reducers, tractors
One-Piece Head and Shank
The gear head is upset from the shank in a controlled sequence, so grain flows from the shank into the tooth region without interruption. On differential pinions carrying full drive torque through a small tooth count, that continuity is decisive.
Case Hardening Response
20MnCr5, 16MnCr5 and EN353 blanks are forged with a controlled finish temperature so case depth after carburising stays consistent piece to piece — the property gear shops care about most when they receive blanks from a new supplier.
- Uniform hardenability
- Consistent case depth response
- Controlled finish temperature
- Traceable to heat number
Machining Allowance
Blanks are supplied with an allowance matched to your tooth cutting and grinding route, keeping stock removal light without risking under-size after distortion.
Pinion Capability and Supply Condition
A pinion is a shaft and a gear in one part, so it must resist torsional fatigue along its length and contact fatigue at its teeth. Forging the head integrally with the shank avoids the joint a two-piece design would have to trust at the highest-torque location.
| Parameter | Range |
|---|---|
| Shank diameter | 20 mm – 120 mm |
| Head diameter | 40 mm – 250 mm |
| Materials | 20MnCr5, 16MnCr5, EN353 |
| Supply condition | Normalised or annealed to agreed hardness band |
| Blank type | Near-net upset head |
| Case hardness after carburising | 58 – 62 HRC |
Why Consistent Case Response Matters to Gear Shops
A gear shop that receives pinion blanks has already tuned its carburising cycle and grinding allowances to a particular hardenability. Blanks that respond differently from batch to batch produce variable case depth and variable distortion, which shows up as scrap. We control forging finish temperature and the subsequent anneal so hardenability stays consistent piece to piece, and we supply blanks at the hardness band your hobbing operation prefers. See forged gear blanks.
- Controlled finish temperature for consistent case response
- Machining allowance matched to your tooth cutting route
- Hardenability band agreed with the gear manufacturer
- Traceable to the steel heat number
Topics covered on this page
- forged pinion manufacturer India
- pinion shaft forging supplier
- bevel pinion blank forging
- differential pinion India
Based on work carried out at our own forging plant at Gundasara, Gondal, Rajkot — operating since 2008.
Questions Answered
Do you supply pinion blanks or finished pinions?
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Blanks, proof machined to your allowance. Tooth cutting is generally done by the gear manufacturer.
Why forge the head integrally?
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A welded or assembled head introduces a joint at the highest-torque location. Integral upsetting keeps grain continuous from shank to teeth.
What supply hardness do you provide?
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Normalised or annealed to the band your machining process prefers, typically 180–220 BHN.
Can you meet a specific case depth after carburising?
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We control forging and normalising so hardenability is uniform; the carburising cycle itself is set by your heat treatment specification.