20CrMnTi High Precision HRC25~38 Straight Bevel Gear For Industrial Machine

20CrMnTi High Precision HRC25~38 Straight Bevel Gear For Industrial Machine 

Straight bevel gear is also named straight miter gear, tooth trace parallel to generating line of pitch cone, always applied in paired set. It transmits torque & rotary power between intersecting shafts (standard 90°, custom 0~180° optional). Main raw materials: 45# steel,40Cr,20CrMnTi,42CrMo, three heat-treatment options: normalized for economy, induction hardening for medium load, carburizing hardening for heavy load; precision grade ISO6~9 / JIS4~7, design based on big-end module. Widely used for reducer, agricultural machinery, packaging machine, machine tool, construction machinery, auto differential and automation steering unit, suitable for low/medium speed with linear speed ≤5m/s, featuring simple structure, easy machining & cost-effective.

Product Features

• 90° power steering: Realize vertical power transmission easily, unavailable for spur cylindrical gear.
• Straight tooth profile: Zero spiral angle, easy calculation, mass production by standard bevel gear planer/hobber.
• Stable axial thrust: Axial force unchanged with rotation direction, simple bearing configuration & higher assembly tolerance.
• Dual hardness design: Hardened tooth HRC52~62 for wear resistance, tempered core HRC25~38 for anti-fracture.
• Multi bore option: Plain bore, keyway bore, set-screw tapped bore with standard H7 tolerance.
• High assembly tolerance: Insensitive to minor shaft misalignment, no jam or eccentric wear from small installation error.
• Cost competitive: 30% lower cost & shorter lead time vs spiral bevel gear for mass production.
• Custom anti-rust finish: Blackening, phosphating, galvanizing, anti-rust oil for dusty & humid environment.

 Technical Parameter Table

Main Application

• Right-angle reducer: 90° steering gearbox & reduction unit.
• Agriculture machine: Harvester, transplanter, feed mixer steering set.
• Light automation: Packer, labeller, conveyor, elevator right-angle drive.
• Machine tool: Lathe feed box, drill spindle drive, small dividing head component.
• Construction & auto: Light truck differential, mini excavator slew, truck crane steering assembly.
• Small equipment: Power tool, fitness machine, valve actuator, garden trimmer spare part.
• Overseas replacement: Interchange spare for KHK/MISUMI standard gear, after-market service parts.

Product Advantages

• Flexible steering: Low-cost solution for intersecting shaft power turn, compact layout saves installation space.
• Easy manufacture: Processed by standard bevel planer/hobber without special spiral gear machine, fast delivery.
• Convenient assembly: High tolerance for minor shaft offset, easy field setup without precision fixture.
• Cost-effective: 55%~70% price of equivalent spiral bevel gear, obvious cost down for bulk order.
• Universal interchange: Dimension matched with MISUMI/KHK for direct replacement of imported parts.
• Low maintenance: Simple grease lubrication, replace paired set only once failed.

Production Process

• Raw material inspection: Spectrum test & flaw detection to reject defective steel blank.
• Cutting & rough turning: Bar cutting, CNC rough turning for cone, bore & reference face.
• Gear cutting: Straight bevel planer / CNC bevel hobbing machine for tooth forming.
• Chamfer & deburr: Tooth end & bore deburr to eliminate abnormal noise & shaft scratch.
• Overall tempering: Bulk temper for 45#/40Cr to improve substrate toughness against breakage.
• Tooth hardening: Induction hardening for medium load; carburizing for heavy-load 20CrMnTi parts.
• Precision grinding: High-precision gear grinding to meet ISO6~7 backlash & tooth profile tolerance.
• Bore processing: Keyway broaching, tapped hole machining, bore honing to H7 tolerance.
• Anti-corrosion finish: Blackening/phosphating/galvanizing + preservation grease.
• Pair test run: Mating trial rolling, contact pattern & smoothness inspection before final QC & packing.

Why Choose us?

• 7-axis CNC Grinding: We adopt high-precision 7-axis CNC grinding machines, holding tolerances as tight as ±5μm, ensuring gears run quietly, smoothly and with outstanding durability.
• Strong technical expertise: Our core R&D team includes doctoral and master’s professionals specializing in spiral bevel gear technology, providing strong technical support for complex projects.
• Rigorous testing & high precision: All gears undergo 100% inspection with Gleason metrology systems. We can achieve DIN 6 grade accuracy with strict control over tooth profile and direction errors, keeping our quality at the industry-leading level.
• High transmission efficiency: Our gear designs support a single-stage reduction ratio of up to 300:1, with actual transmission efficiency reaching over 95%, greatly improving energy utilization.
• Excellent durability & cost efficiency: Our gears deliver 40% lower lifecycle cost and a failure rate below 0.5%, ensuring stable long-term operation and reduced maintenance costs.
• Fast response & short lead time: Supported by our digitalized production process, we are able to shorten the delivery cycle to only 20 working days, helping you accelerate project development and launch.
• Professional custom design capability: We provide fully customized gear solutions for applications requiring high-reduction, high-speed, heavy-load, low-noise, and special small-tooth profiles, based on your actual working conditions.