Industrial Helical Metal Gear Parts

Industrial helical metal gear parts are at the heart of heavy-duty power transmission systems where smooth meshing, high torque density, and low operating noise are required. Our manufacturing scope includes Steel Helical Gear Components made from carburizing-grade steel for maximum core toughness, Alloy Helical Transmission Gears engineered from nickel-chromium-molybdenum alloys for superior fatigue resistance, Metal Helical Pinion Sets supplied as matched pinion and gear pairs with fully conjugate tooth contact, and Metallic Helical Gear Wheels with ground or skived profiles for AGMA Class 10 and higher accuracy. Helical tooth geometry provides gradual engagement, which reduces impact loading and noise compared with spur gears, making these parts suitable for pumps, compressors, conveyors, and off-highway final drives. The core design envelope and production capabilities are listed below.

• Material options: 20CrMnTi, 42CrMo, 17CrNiMo6, 20MnCr5, 8620, 4340, EN36C, 4140, 4150, and 316 stainless on request.
• Module range: 1.0–16 mm normal module; 0.5 mm available for instrument drives.
• Pressure angle: 20° standard; 14.5° and 25° optional for special load and backlash needs.
• Helix angle: 10°–45°, commonly 15°, 20°, 25°, and 30° for balanced axial thrust.
• Tooth accuracy: DIN 3962 grade 5–8, AGMA 2015 class 10–13, JIS B 1702 grade 2–4.
• Hardness after heat treatment: HRC 58–62 case depth 0.6–1.8 mm; through-hardened options HRC 32–45.
• Surface finish: Ra 0.4–0.8 μm ground; Ra 1.6–3.2 μm shaved or hobbed.
• Max dimensions: outside diameter up to 1,500 mm, face width up to 600 mm, weight up to 3,000 kg per piece.
• Bore and hub configuration: plain bore, keyway, spline, shrink disc, or integral shaft.
• Surface treatments: carburizing, induction hardening, nitriding, carbonitriding, black oxide, phosphating, zinc plating.
• Tooth modifications: tip relief, root relief, lead crowning, bias modification, topological correction.
• Noise control: profile crowning 5–20 μm, helix crowning 5–25 μm, lead slope correction 0–10 μm.
• Balancing: dynamic balancing to G2.5 or G1.0 for high-speed gear shafts.
• Custom features: oil holes, keyways, splines, set screw holes, tapped puller holes, shoulder pins.
• Prototyping: 3D CAD models, FEA tooth contact analysis, reverse engineering from worn samples.

Industrial Helical Metal Gear Parts are produced under a fully traceable process chain that begins with certified round bar or forged blanks and ends with CMM inspection and rust-preventive export packaging. Typical workflow includes saw cutting, normalizing, turning, hobbing or gear shaping, deburring, carburizing or induction hardening, bore grinding, and tooth grinding on CNC gear grinders with on-machine gear inspection. For high-volume automotive and agricultural applications, gear skiving and power honing deliver DIN 7 accuracy at competitive cycle times. For wind turbine, mining, and steel mill gearboxes, deep case carburizing with shot peening increases root bending fatigue life by 25–35% compared with untreated surfaces. Additional processes such as nitriding, carbonitriding, black oxide coating, and phosphating are available for special corrosion or wear requirements. For replacement and aftermarket needs, we reverse engineer worn or failed gear sets using 3D scanning and gear calculation software, then supply upgraded materials and tooth modifications to extend service life. Standard bore tolerances are H7, with keyway per DIN 6885 or ANSI B17.1, and face runout controlled within 0.02 mm per 100 mm diameter. When high-speed operation is required, AGMA Class 12 or better ground gears with dynamic balancing to G2.5 and oil jet lubrication ports in the web are recommended. Each production lot is verified with a Klingelnberg gear measuring center, double flank rolling tester, and tooth root magnetic particle inspection. Dimensional reports, material certificates, and PPAP Level 3 documentation are provided as standard for serial orders. All parts are shipped with VCI paper, silica gel, and export-grade plywood crates to prevent corrosion during ocean freight. Typical lead time is 18–25 days for prototype quantities and 30–40 days for mass production, depending on blank availability, heat treatment batch size, and tooth grinding capacity.