ZhongYi Gear Manufacturer (a member of ZhongYi Machinery) | China Precision Gear & Rack Factory Since 2003
China Gear Shafts Manufacturer
Custom integral spur, helical, bevel, and worm pinion shafts for compact transmission assemblies.
Source Factory
China Direct (2,800mยฒ Plant)
Precision Grade
DIN 4-7 / AGMA 11-13
Engineering DFM
< 24 Hours Turnaround
Quality System
ISO 9001:2015
China direct manufacturer of custom integral pinion shafts, splined transmission shafts, and motor rotor shafts with precision ground journals.
Product type
Integral spur pinion shaft, helical pinion shaft, bevel pinion shaft, or splined gear shaft
Manufacturing basis
Customer 2D/3D drawing, CAD model, or complete transmission shaft sample
Shaft dimensions
Shaft diameters from ร15 mm to ร200 mm, overall lengths up to 1500 mm
Gear tooth types
Spur, helical (RH/LH), straight bevel, spiral bevel, or single/multi-start worm pinion
Product Matrix
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China direct manufacturer of custom integral pinion shafts, splined transmission shafts, and motor rotor shafts with precision ground journals.
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Manufacturing capability
As a premier China gear manufacturer and direct OEM factory in Zhejiang with 20+ years of machining experience, ZhongYi manufactures custom gear shafts and integral pinions from CAD drawings or physical samples. Custom gear shafts combine tooth geometry with bearing seats, shoulders, splines, threads, keyways, and lubrication features in a single workpiece. ZhongYi reviews custom gear shafts for module or DP, helix or bevel data, shaft diameters, bearing fits, axial locations, material, heat treatment, straightness, and runout.
Product types & variants
The final product form is confirmed from the buyer drawing, mating component, assembly layout, operating conditions, and inspection requirements.
Straight-tooth pinions integrated with bearing journals and mounting features for parallel-shaft drives.
Angled-tooth shaft components requiring helix, axial-load, bearing, heat-treatment, and datum review.
Angular-drive pinions controlled as part of a matched bevel pair and a defined mounting-distance arrangement.
Single- or multi-start worm geometry integrated with shaft journals, shoulders, threads, and drive features.
Dynamic balance shafts with integral ground spur or helical gears and eccentric counterweights for automotive and diesel engines.
Matched male and female drive shafts, counter-rotating transmission shafts, and multi-stage reduction pinion shafts.
Selection & Metallurgy guidance
A gear shaft drawing should define functional datums and the relationship between the gear teeth, bearing journals, shoulders, and drive features. Identify which surfaces are finished before or after heat treatment and where hardness is required or prohibited. Bearing fits, seal surfaces, threads, splines, keyways, center holes, lubrication features, and allowable runout should be stated. The RFQ should also include mating gears, bearing layout, transmitted torque, bending load, speed, duty cycle, and assembly method so manufacturing feasibility can be reviewed responsibly.
Quality Control & Inspection Matrix
Overseas procurement teams require verifiable technical data, not unsupported claims. Every production batch at ZhongYi is inspected against approved CAD blueprints and international standards (DIN, AGMA, ISO).
Component-Specific Quality Focus:
Gear shaft quality depends on transparent process and datum control. ZhongYi can review the drawing revision, material, blank route, machining sequence, heat-treatment zones, finish grinding, straightening allowance, and inspection plan. Depending on the approved requirements, checks may cover journal diameters, fit and surface finish, straightness, concentricity, gear runout, tooth measurements, hardness, thread gauges, spline data, and final dimensional reports. No fatigue life, fit class, or case-depth value is assumed when it is absent from the technical file.
Validates 3D spatial GD&T, bore concentricity, center distance, and geometric tolerances down to ยฑ0.002 mm.
Inspects involute tooth profile error (fฮฑ), lead crowning (fฮฒ), pitch cumulative error (Fp), and radial runout (Fr).
Verifies surface hardness (58โ62 HRC), core toughness, and effective carburized / nitrided case depth gradient.
100% chemical composition verification of alloy steel forgings (20CrMnTi, 42CrMo, 18CrNiMo7-6, Stainless, POM).
We maintain strict incoming material spectroscopy, in-process CNC tooth coordinate monitoring, and 100% final pre-shipment dimensional inspection. All custom gear batches are backed by our full manufacturing warranty.
Application fit
Match the gear type with real machinery conditions, operating environment, load, speed, and replacement requirements.
Discover how this gear category meets extreme torque, low backlash, quiet operation, and weather-resistance demands in primary industry sectors:
High-torque, impact-resistant gears, girth rings, and planetary drive sets engineered for excavators, cranes, drilling rigs, and heavy mining crushers.
Low-backlash, ultra-precise fine-pitch gears, ground helical racks, and planetary gearheads for robotics, AGV wheel drives, and high-speed motion axes.
High-torque bevel gears, spur gears, and splined drive shafts for tractors, harvesters, rotary tillers, and agricultural PTO gearboxes.
Technical FAQ
These answers support early engineering and procurement review. Final dimensions, materials, tolerances, and process requirements are confirmed against the approved drawing file.
ZhongYi specializes in integrated pinion shafts with in-house turning, hobbing, carburizing, straightening, and CNC cylindrical grinding. We achieve journal runout under 0.005 mm and provide full MTR 3.1 material traceability.
The tooth form is manufactured directly on the shaft or pinion blank, removing a separate gear-to-shaft joint. This can improve compactness but increases the importance of bearing datums, heat-treatment distortion, straightness, and process sequence.
Provide bearing-seat diameters and fits, shoulder positions, overall length, threads, splines, keyways, center holes, seal surfaces, gear geometry, runout, material, heat treatment, surface finish, and quantity.
A sample can be reviewed, but bearing wear, bent shafts, tooth wear, and previous repairs may hide original dimensions. Assembly drawings, mating gears, bearings, and historic inspection data are valuable.
Send your 2D blueprints or 3D CAD models. Our senior gear engineering team will review tooth geometry, module/pitch, materials, heat treatment feasibility, and provide transparent factory pricing within 24 hours.
Mutual NDA Protection
We sign strict Non-Disclosure Agreements to safeguard proprietary designs.
< 24h DFM Feedback
Rapid manufacturability review, tolerance checks, and unit quotation.
Direct Factory Engineering
Direct technical communication with senior master gear artisans.
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