Forged Camshafts
Camshaft lobes work under extreme contact stress against followers, cycle after cycle, for the entire life of the engine. A forged blank gives the dense, inclusion-free surface layer that survives that contact once hardened and ground.
- Shaft Length
- Up to 1,000 mm
- Materials
- EN8, EN9, 20MnCr5, alloy grades
- Lobe Hardness
- Up to 58 HRC
- Journal Finish
- Ra 0.4 µm ground
- Straightness
- Within drawing tolerance after grinding
- Applications
- Diesel engines, tractors, pumps
Forged Camshafts at a glance
Quotable facts from Avadh Techno Forge, Gundasara, Gondal, Rajkot.
- Shaft Length: Up to 1,000 mm
- Materials: EN8, EN9, 20MnCr5, alloy grades
- Lobe Hardness: Up to 58 HRC
- Journal Finish: Ra 0.4 µm ground
- Straightness: Within drawing tolerance after grinding
- Applications: Diesel engines, tractors, pumps
Contact Stress on the Lobe Flank
Hertzian contact between lobe and follower runs into the GPa range. Any inclusion or porosity just below the surface becomes a spall initiation point, so blank cleanliness — a direct consequence of forging over casting — governs service life.
- Dense, inclusion-controlled surface layer
- Hardened lobe flanks
- Ground journals to size
- Straightness held over full length
Hardening the Lobes
Lobes are induction or chill hardened to the required surface hardness while journals are finished separately, so wear resistance and shaft toughness are optimised independently rather than compromised into one condition.
Straightness and Timing Accuracy
Long slender shafts distort during heat treatment, so straightening and final grinding follow hardening. Lobe angular position is verified against the timing drawing before release.
Topics covered on this page
- forged camshaft manufacturer India
- camshaft forging supplier
- camshaft blank manufacturer Rajkot
- diesel camshaft India
Based on work carried out at our own forging plant at Gundasara, Gondal, Rajkot — operating since 2008.
Questions Answered
Do you supply camshaft blanks or finished camshafts?
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Both. Many customers take forged and normalised blanks for their own machining; others take fully ground and hardened shafts.
How are lobes hardened?
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Induction hardening on the lobe flanks with the journals treated separately, so each area gets the property it needs.
Can you hold lobe timing angles?
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Yes, angular position is machined and verified against the timing drawing.
What is your minimum camshaft batch?
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500 pieces for new tooling; smaller repeat batches once the die exists.