Customized Internal Gears 42CrMo4 Coupling Forging

Customized Internal-Gear 42CrMo4 Coupling Forging Blank   Material 42CrMo4 (1.7225) vacuum-degassed billet – full traceability to EN 10204 3.1. Key process chainHot forge → Q+T to 28–36 HRC → rough turn ID/OD & tooth pilot → sub-critical anneal (650 °C) for maximum machinability → blast & primer. Mechanical resultRm 900-1 100 MPa, Rp0.2 ≥ 650 MPa, Kv –40 °C ≥ 35 J; uniform hardness ±2 HRC. Inspection100 % UT to EN 10228-3 Class 3; MT on tooth-root area; CMM check of pilot bore & run-out ≤ 0.2 mm. Size range Ø 200 – 1 500 mm, height 50 – 400 mm, weight 50 – 3 000 kg Internal involute or straight spur profiles per DIN 5480 / ISO 4156, module 4-20, accuracy class 10 pre-cut. ApplicationsLarge planetary gearboxes, wind-turbine couplings, marine thruster drives, heavy pump hubs. Delivery stateRough-turned annealed blank ready for final gear cutting & hardening; 3–4 weeks ex-works, sea-worthy crate.     Our main products include Ring forgings, Shaft forgings, Forged s…

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