Bevel Gears
Spiral bevel sets, pinions, integrated shafts, and matched components for angled power transfer and transmission assemblies.
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Made-to-drawing gear components
Custom Gear Manufacturing
Jinhua Machinery reviews bevel, helical, spur, ring-and-pinion, gear-shaft, and related transmission components from drawings, standards, and technical requirements.
Gear tooth and shaft features
Machining, heat treatment and finishing
Inspection planning from drawings
Jinhua Machinery is a custom gear manufacturer supporting made-to-drawing bevel, helical, spur, ring-and-pinion, pinion, and gear-shaft programs for automotive and industrial applications. Each quotation reviews tooth geometry, governing standard, blank, material, heat treatment, datum structure, batch size, mating conditions, and required inspection records before selecting the route. Depending on the approved drawing, manufacturing can combine blank preparation, CNC turning, milling, hobbing or shaping, heat treatment, finish hobbing or grinding, and final inspection. Confirmed gear-accuracy conditions apply only within their published ranges and remain subject to drawing and measurement-method review.
Gear manufacturing capabilities
Select the gear family that matches your drawing
Each family has its own overview, materials, applications, services, manufacturing capabilities, FAQ, and quote path. This keeps buyer review focused and avoids unavailable product pages.
Helical Gears
Helical wheels and integrated shafts for gearbox, reducer, steering, motor, and machinery drive programs.
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Ring & Pinion Gears
Matched ring-and-pinion programs for transmissions, differentials, reducers, and heavy-duty motion-control systems.
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Spur Gears
Spur wheels, toothed hubs, and machined blanks for repeatable drive and positioning assemblies.
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Manufacturing planning
Material, heat treatment, processing and inspection must be planned together
Gear quality is not created by tooth cutting alone. Blank condition affects datum stability; heat treatment affects hardness and distortion; finishing allowance determines whether post-treatment tooth and mounting relationships can be recovered; and the inspection method determines how the drawing is accepted. These decisions are reviewed as one manufacturing route before quotation.
Materials and heat treatment
Commonly specified case-hardening steels include 20CrMnTi, 20CrNiMo or 20CrNiMoA, SAE 8620 or 8620H, 16MnCr5 and 20MnCr5. Through-hardening or induction-hardening designs may specify 45 steel, SAE 1045, 40Cr, 42CrMo, SAE 4140 or other drawing-approved alloys. Material substitution is not assumed.
Carburizing, quench and temper, induction hardening and nitriding are reviewed against tooth-root strength, case-depth, core properties, distortion and finishing allowance. The released drawing must define the governing grade, hardness, case requirements and certification.
Process route and manufacturing boundary
Hobbing is commonly reviewed for accessible external teeth; shaping may suit internal teeth or features with restricted cutter clearance; post-heat-treatment grinding is selected where the reviewed accuracy, surface or datum relationship requires it. Tooling, finishing allowance and datum recovery are planned before production.
Jinhua Machinery manages manufacturing review, route control, inspection planning and traceability. If an approved external processor is used for a specific operation, that operation and its control requirements are confirmed during quotation rather than presented as an unconditional in-house capability.
Inspection records for buyer approval
Inspection planning can cover tooth profile, lead, pitch, runout, tooth thickness, bore or journal size, face relationships, hardness, case depth and surface roughness. Functional rolling, analytical tooth measurement and datum-based dimensional checks are selected according to the drawing.
Requested records can include dimensional reports, gear-accuracy reports, material certificates, heat-treatment or hardness records, case-depth results and lot traceability. Equipment and report format are agreed during technical review. See the Quality Inspection page for the confirmed capability basis.
What a custom gear drawing and RFQ should define
A gear name and outside diameter are not enough to select a manufacturing route. The quotation must connect tooth geometry, material, heat treatment, functional datums, mating conditions, production quantity, and the required measurement method.
Tooth geometry and governing standard
Provide gear type, module or diametral pitch, tooth count, pressure angle, helix or spiral angle and hand, face width, profile shift, tooth thickness or backlash definition, root and tip requirements, and any profile or lead modifications.
Name the governing ISO, GB/T, DIN, AGMA, ANSI, SAE, customer, or industry standard and edition. Accuracy numbers from different standards are not assumed to be equivalent.
Mating gear and operating condition
Share the mating component data, center distance or mounting distance, ratio, torque, speed, duty cycle, lubrication, direction of rotation, noise expectation, environment, and service-life target when available.
Matched bevel or ring-and-pinion programs also require contact pattern, backlash, mounting position, pairing, and assembly acceptance requirements.
Blank, material and heat treatment
Identify bar, forged, cast, or other blank requirements; material grade and standard; delivery condition; hardness; case depth; core properties; metallurgical limits; and any protected surfaces. Annual demand and batch size influence blank and tooling decisions.
Allowance must cover rough tooth generation, heat-treatment movement, datum recovery, and any post-treatment grinding or finishing required by the drawing.
Datums, inspection and reporting
Define the functional datum system and relationships among the bore or journals, mounting face, tooth pitch diameter, and other locating features. Mark the individual profile, lead, pitch, runout, tooth-thickness, roughness, and dimensional characteristics that govern acceptance.
State required material, heat-treatment, gear-accuracy, dimensional, case-depth, traceability, sample-approval, and production reports with the requested sampling frequency.
Drawing-to-production route
How a custom gear moves from technical review to inspection
The exact sequence varies by gear family and drawing. The stages below describe the decisions that must remain connected; they do not imply that every component uses every operation.
- 1. Technical and manufacturability review Confirm tooth definition, standard edition, material, heat treatment, datums, mating conditions, quantity, required reports, and unresolved drawing questions.
- 2. Blank and datum strategy Select the reviewed blank route and establish machining references for the bore, journals, faces, or shaft features that will control later tooth operations.
- 3. Rough machining and tooth generation Machine locating features and generate tooth stock by the approved process, such as hobbing or shaping, while reserving allowance for heat-treatment movement and finishing where required.
- 4. Heat treatment and finishing Apply the drawing-approved treatment, recover critical datums, and complete grinding, finish hobbing, bore or journal finishing, face finishing, or other specified operations.
- 5. Inspection, traceability and release Verify tooth deviations and datum-related dimensions using the agreed method, connect results with material and heat-treatment records, and release only against the approved control plan.
Drawing-based gear components with recorded process data
Carburized Gearbox Gear Shaft
A hot-forged gear-shaft case with machining, carburizing, hardness and case-depth requirements defined for that released component.
Precision Steering Pinion
A 20CrMo right-hand helical pinion case using rough hobbing before carburizing and finish hobbing after carburizing, with DIN 8 tooth-deviation and case-depth requirements defined by the released drawing.
Forged Sun Gear Shaft
A forged sun-gear-shaft case with quench-and-temper requirements, controlled outside diameters and gear-quality requirements specific to the project.
These cases demonstrate completed process routes; they are not default specifications for new parts. New drawings receive an independent manufacturability and inspection review.
How quoting works
Request a Quote
Send gear drawings. Get a manufacturing review.
Share drawings, samples, materials, tooth requirements, heat treatment needs, surface treatment, quantity, and application when available. We review manufacturability before quotation.
FAQ
Custom gear manufacturing questions
What technical information is required for a custom gear quotation?
Send the drawing and available 3D data, gear type, module or diametral pitch, tooth count, pressure angle, helix or spiral data, material, heat treatment, accuracy standard and edition, datum system, mating conditions, surface finish, inspection reports, batch and annual quantity, and application environment.
Can you support gears with integrated shaft features?
Yes, subject to drawing review. Gear teeth, shaft shoulders, splines, keyways, threads, bores, bearing seats, faces, heat-treated zones, and inspection points can be planned as one manufacturing program so tooth and shaft datums remain connected.
Which gear standards can Jinhua Machinery evaluate?
Drawings based on ISO, GB/T, DIN, AGMA, ANSI, SAE, customer-specific, or industry-specific standards can be evaluated. Provide the standard name, edition, accuracy grade, individual deviation limits, datum system, and reporting method. Grade numbers in different standards are not treated as directly equivalent.
How are heat treatment and post-treatment finishing reviewed?
Carburizing, quench and temper, induction hardening, nitriding, and other drawing-specified treatments are reviewed with material, hardness, case or core requirements, distortion risk, finishing allowance, and inspection method. Grinding or another finishing route is included only where required by the approved drawing and capability review.
Can matched bevel gears or ring-and-pinion sets be quoted?
Yes, when the RFQ includes both mating-member definitions and the required mounting distance, backlash, contact pattern, pairing, marking, inspection, and assembly acceptance criteria. A gear and pinion cannot be evaluated as a matched set from one member alone.