Custom CNC machining of gear shaft from China per drawing

Precision CNC machined gear shafts made exactly per your drawing and sample. We custom machine gear shafts in any material, heat treatment, surface finish, size and accuracy class you specify, from a single prototype piece to high-volume mass production.

Ra 0.2 µm achievable ground finish ±0.005 mm diameter tolerance From 1 piece to mass production Custom per drawing and sample

Machined Gear Shaft Products

A selection of custom CNC machined gear shafts produced per customer drawings: spline shafts, helical gear shafts, straight gear shafts and alloy steel gear shafts in a wide range of sizes, materials and accuracies.

CNC machined spline gear shaft from China

Custom gear shaft machined per drawing OEM China

42CrMo steel helical straight gear shaft

Gear Shaft Materials We Machine

C45 / 45# carbon steel, economical general-purpose steel for medium-load CNC machined gear shafts
40Cr (AISI 5140), medium-carbon alloy steel with balanced strength and toughness for transmission gear shafts
42CrMo (AISI 4140), high-strength alloy steel with excellent fatigue resistance for heavy-duty gear shafts
20CrMnTi, case-carburizing steel that gives a hard tooth surface with a tough core, standard for automotive gear shafts
20CrNiMo (AISI 8620), carburizing grade for high wear resistance and impact toughness
40CrNiMo (AISI 4340), ultra-high strength steel for mining, marine and heavy machinery gear shafts
Stainless steel 304 / 316, corrosion-resistant gear shafts for food, chemical and marine applications
Aluminum alloy 6061 / 7075, lightweight CNC machined gear shafts for robotics and aerospace
Brass and bronze, corrosion-resistant low-friction gear shafts for instruments and special drives
Any alloy steel on your drawing, we source and machine per your material specification

Heat Treatment Options

Normalizing and annealing
Through hardening and tempering
Case carburizing and quenching
Induction hardening of journals and tooth flanks
Nitriding for wear resistance with low distortion
Stress-relief tempering for dimensional stability
Deep cryogenic treatment on request
Custom hardness ranges per drawing

Surface Treatment and Finishing

Cylindrical grinding
Centerless grinding
Gear grinding
Super finishing and honing
Black oxide coating
Zinc, nickel or chrome plating
Phosphating
Shot blasting and sand blasting
Mirror polishing
Custom surface finish per drawing

Typical Gear Shaft Applications

Automotive transmission and gearbox shafts
Electric motor shafts with integrated gear
Industrial reducers and gearboxes
Hydraulic pump and motor shafts
Agricultural machinery drive shafts
Construction and mining equipment
Machine tool spindles and feed shafts
Robotics and automation drive shafts
Marine and offshore propulsion
Wind power and new energy equipment
Textile and packaging machinery
Precision instruments and aerospace parts

Custom Machining Per Drawing and Sample

Accept drawings in DWG, DXF, PDF, STEP, IGES and STP formats, or machine per your physical sample
Custom overall length, step diameters, tapers, keyways, splines, threads and cross holes
Custom gear module, tooth count, pressure angle and helix angle per drawing
Custom material, heat treatment and surface finish combinations
Dimensional tolerances and surface quality specified exactly per drawing
Engineering review with DFM feedback before production starts
Sample machining and sample approval before mass production
OEM and ODM gear shaft machining per your specification

Surface Quality and Dimensional Precision

Our CNC machining workshop routinely achieves the following surface quality and dimensional accuracy on custom gear shafts:

Process	Achievable Ra	Typical tolerance
Rough turning	Ra 3.2–6.3 µm	±0.05 mm
Finish turning	Ra 1.6 µm	±0.01 mm
Cylindrical grinding	Ra 0.2–0.8 µm	±0.005 mm
Super finishing	Ra 0.05–0.2 µm	±0.002 mm
Gear hobbing / shaping	Ra 1.6–3.2 µm	Tooth class per drawing
Gear grinding	Ra 0.4–0.8 µm	Tooth class per drawing

Concentricity and radial runout controlled within 0.01–0.02 mm
Straightness and parallelism checked on long slender shafts
Involute splines machined per drawing, DIN 5480, JIS or ANSI profiles
100% dimensional verification with CMM and 2D projector

From Single Piece to Mass Production

Single prototype piece for validation
Small batches of 10–100 pieces for trials
Medium batches of 100–1,000 pieces
Large-volume mass production with stable repeatability
In-process inspection across the whole batch
Fast sampling for urgent custom gear shaft needs
Flexible scheduling with clear lead times
Cost-optimized unit price at high volume
Safe packaging with wooden cases and trays
Steady supply for long-term programs

CNC Machining Processes

CNC turning of shafts and bar work
CNC milling of keyways, flats and pockets
Gear hobbing
Gear shaping
Gear grinding
Spline broaching and spline rolling
Cylindrical and centerless grinding
Drilling, boring, tapping and threading
Wire EDM for special tooth profiles
Balancing and lapping on request

Gear Shaft Types and Features

Spur gear shafts
Helical gear shafts
Double-helical gear shafts
Bevel gear shafts
Worm gear shafts
Involute spline shafts
Parallel-side spline shafts
Stepped pinion shafts
Keyed and keyway shafts
Hollow gear shafts

Quality Control and Inspection

Incoming material verification before machining
In-process dimensional checks with micrometers and calipers
CMM measurement for complex gear and spline profiles
2D profile projector for tooth profile and contour checks
Surface roughness testing with a portable roughness tester
Hardness testing after heat treatment
Concentricity, runout and gear accuracy gauging
Final inspection per drawing before shipment
Inspection reports available for every batch
Full machining records kept per order

CNC Machining Workflow for Custom Gear Shafts

Every custom CNC machined gear shaft follows the same controlled route from drawing to delivery, with inspection points at each stage.

Drawing review and DFM

Material selection and cutting

CNC turning

Gear machining (hobbing / milling)

Heat treatment

Grinding and finishing

Inspection and QC

Packaging and delivery

Machining and Inspection Capabilities

From the first cut to the final measurement, every custom CNC machined gear shaft passes through controlled machining and inspection stations under one roof.

CNC milling service for custom gear shafts — CNC milling service

CNC turning service in China for gear shaft machining — CNC turning service

2D projector measuring

CMM testing for gear shaft precision measurement — CMM testing

Custom CNC Machined Gear Shafts for Every Application

From automotive transmission gear shafts and electric motor gear shafts to spline shafts, helical gear shafts and hardened and ground gear shafts, we machine custom gear shafts per your drawing and sample. Every CNC machined gear shaft is produced with the right material, heat treatment, surface finish, dimensional tolerance and accuracy class your application demands. 42CrMo gear shafts, 40Cr gear shafts, 20CrMnTi carburized gear shafts, stainless steel gear shafts and aluminum gear shafts are all within our daily production range, machined by CNC turning, CNC milling, gear hobbing, spline broaching and precision grinding.

One Workshop from Prototype to Mass Production

Whether you need a single sample piece for testing, a small batch for a new product launch, or large-volume mass production for an ongoing program, our CNC machining workshop delivers consistent quality at every quantity. Combining CNC turning, CNC milling, gear hobbing, grinding, heat treatment and full inspection under one roof keeps lead times short, quality stable and unit cost competitive for custom CNC machined gear shafts from China. Send us your drawing or sample, and we machine the gear shaft exactly as specified, in the material, precision and finish you need.