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Our online quoting platform and broad range of capabilities make it easy to source custom parts for both prototyping and production
BestPro, a professional CNC machining supplier in China, fabricate CNC-machined gears, shafts, spline shafts and custom gear shafts combined parts for industrial equipment, automobile systems, automation machinery and energy applications. Everything is machined to the customer from drawing and tolerance, surface finish, or load bearing requirements.
Small batches / Prototypes: all CNC-milled and -turned; in addition as hobbing or shaping process
Medium/high volume: for forged blanks and CNC finished for higher strength, dimension stability
Material, heat treatment as well as machining route are dependent on the position of gear/shaft and application load.
Machine tools: spur/helical gears, drive shafts, coupler shafts
Automotive & EV: gears, splines, input/output shafts
Agriculture & off road: Bevel gears, power transfer shafts
Automation & robotics: small module gears, precision splined shafts
Energy & pumps: pump drives, torque shafts, spline connections
High speed gears: hardness gradient, low noise
Heavy-load shafts: torsional fatigue resistance
Aggressive environment: stainless steel or treated surfaces
| Position / Use | Recommended Materials | Heat Treatment | Surface Treatment | Key Characteristics |
| Gear teeth (spur/helical/bevel) | 17CrNiMo6, 20MnCr5, 16MnCr5 | Carburizing + Q&T, gear grinding | Shot peening, polishing | Surface hardness is high wearable, impact resistance strength is very good. |
| High-torque shafts | 42CrMo, 20CrMoTi | Q&T / Induction hardening | Grinding, hard chrome | High torsional strength, bending-fatigue resistance |
| Spline shafts | 42CrMo, 20CrMnTi, Stainless 304/316 | Q&T / Nitriding | Polishing, passivation | Stable torque transfer, dimensional consistency |
| Gear-shaft integrated parts | 17CrNiMo6, 20CrMoTi | Carburizing + Q&T | Precision grinding | Anti-slip/motion tooth root, compact structure applicable for high speed |
| Small-module gears | Alloy steel, tool steel | Through-hardened / nitrided | Polishing, black oxide | High accuracy, good wear resistance |
| Corrosion-resistant shafts | Stainless 304/316, Duplex SS | Annealed / age hardened | Passivation | Can be used outdoors or with food equipment |
Fully machined by CNC technology: turning, milling & hobbing/shaping.
Useful for checking gear geometry and centering shafts.
After heat treatment and grinding custom gear shafts have good dimensional stability.
Forged blanks + CNC finish for the most strength and fatigue resistance
Cast blanks + CNC finishing of large or complex shapes
Small, high-volume precision parts by MIM
Choice of processes is based on geometry and shape, use.
Accuracy of gears: pitch, lead, helix angle influence the noise and efficiency.
Runout & concentricity: Important for bearings, load distribution
Spline/keyway precision: stable torque transmission
Hardness distribution of surface layer: toothed face is hard while the core part is tough.
Stability after heat-treatment: deformation is kept to a minimum and change in size remains controllable.
A MS11 Poclain motor shaft of material grade 42CrMo had fractured at the spline transition in application where cyclic torque was applied. The material was upgraded by BestPro to 17CrNiMo6, flat and round carburized with selected hardening. The part was manufactured as a self-contained CNC machined gear–shaft. No more cracking seen after first field tests - customer reordered 100 pcs.
Submit your drawings or specs for Custom Gear Shafts. Our engineers will review material choices, heat treatment and machining path to meet your application & tolerance needs.
Address
No. 852, Wuxiang West Road, Yinzhou District, Ningbo City, China
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