🤖 Sub-Arcminute Motion & Dynamic Positioning
Automation & Robotics
Low-backlash, ultra-precise fine-pitch gears, ground helical racks, and planetary gearheads for robotics, AGV wheel drives, and high-speed motion axes.
custom spline shaft manufacturer
Custom Spline Shafts and Hubs
Precision involute and straight-sided spline shafts, splined sleeves, and mating couplings engineered for high-torque transmission and dynamic sliding connections.
Customization
100% to CAD / Sample
Precision Grade
DIN 4-7 / AGMA 11-13
DFM Analysis
< 24 Hours Turnaround
Quality System
ISO 9001:2015
Product overview
Custom Spline Shafts and Hubs manufacturing starts with confirmed technical requirements.
Review the gear pair, assembly conditions, drawing requirements, specification checks, and inspection points before requesting a quotation.
Spline shafts and mating splined hubs provide the most reliable mechanical connection for transmitting heavy rotational torque, offering multiple load-bearing teeth that distribute torsional shear stress evenly around the shaft circumference. Compared to conventional keyed shafts, splines eliminate keyway notch stress concentrations, maintain superior dynamic concentricity, and can be designed for either fixed interference fits or smooth axial sliding under torque. ZhongYi manufactures custom involute spline shafts (DIN 5480, DIN 5482, ANSI B92.1, ISO 4156) and straight-sided/parallel key splines (DIN ISO 14, SAE J499) from engineering drawings or physical samples. Production capabilities integrate CNC spline hobbing, cold-roll spline forming, internal spline broaching and wire-EDM shaping, precision CNC spline profile grinding, localized induction or case hardening, and multi-diameter cylindrical grinding with journal runout held within 0.005 mm.
Tooth Accuracy DIN 5-7 / AGMA 11-13
Tooth Finishing CNC Ground (Ra ≤0.4µm)
Hardness Grade Carburized 58-62 HRC
Custom Spline Shafts and Hubs Factory Genuine Spec
Selection guidance
How to specify a custom spline shafts and hubs for quotation.
Use application and mating-component data to confirm geometry, materials, mounting details, and the acceptance plan.
Specify the governing spline standard and complete designation code (for example: DIN 5480 - W 45 x 2 x 21 x 7e for an external shaft or DIN 5480 - N 45 x 2 x 21 x 9H for an internal hub). Clarify the fit requirement: sliding fit under load, sliding fit without load, or tight fixed fit. Detail all bearing journal tolerances, oil seal diameter surface roughness (Ra 0.4 - 0.8 µm), center hole specifications (DIN 332), and heat treatment boundary zones on the drawing. If replacing an existing unbranded shaft, provide both the shaft and mating hub for precise pin-measurement reverse engineering.
Technical specifications
Core technical parameters for engineering and procurement review.
| Governing standards | DIN 5480, DIN 5482, ANSI B92.1, ISO 4156, GB/T 3478, SAE J499, DIN ISO 14 |
|---|---|
| Spline types | Involute splines (30°, 37.5°, 45° pressure angles) and Straight-sided parallel splines (4 to 20 keys) |
| Diameter & Length | Spline diameters from Ø12 mm to Ø220 mm; shaft lengths up to 1800 mm |
| Centering methods | Flank centering (side-fit for high torque) or Major/Minor diameter centering (for precision runout) |
| Shaft integration | Bearing journals (h6/js6), oil seal surfaces, threads, snap-ring grooves, cross-holes, integral gears |
| Materials | Alloy steel (40Cr, 42CrMo4 / AISI 4140), Carburizing steel (20CrMnTi, 8620), Stainless steel (304/316/17-4PH) |
Custom options
Manufacturing details that can be reviewed before quotation.
- Involute spline shafts with precision profile-ground teeth for high-speed drivetrains
- Matching internal splined sleeves, bushings, hollow shafts, and splined gear hubs
- Localized medium-frequency induction hardening (HRC 52-58) on spline teeth and wear zones
- Full-depth case carburizing and quenching (HRC 58-62) with ductile shaft journal masking
- Phosphate conversion coating, black oxide, or liquid nitriding for anti-galling sliding properties
Quality control
Inspection points tied to the approved technical file.
- Precision Go / No-Go spline plug and ring gage verification per DIN/ANSI standard class
- Span measurement over pins (W-dimension / dimension over wires) and base tangent length check
- Shaft straightness, total indicated radial runout (TIR), and journal concentricity inspection
- Spline tooth lead and profile error inspection on CNC gear measuring centers
All products can be custom manufactured from 2D/3D CAD drawings or physical samples.
Quality Control & Inspection Matrix
Engineering Evidence & 100% Inspection for Custom Spline Shafts and Hubs.
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:
Spline shafts and mating hubs are manufactured and gage-verified to ensure interchangeability and smooth engagement. Final quality inspection reports document span dimensions over pins, journal sizes, runout, hardness depth, and gage fit records for both external and internal spline components.
Zeiss / Hexagon 3D CMM
Validates 3D spatial GD&T, bore concentricity, center distance, and geometric tolerances down to ±0.002 mm.
Klingelnberg CNC Gear Analyzer
Inspects involute tooth profile error (fα), lead crowning (fβ), pitch cumulative error (Fp), and radial runout (Fr).
Digital Micro-Vickers & Rockwell Testers
Verifies surface hardness (58–62 HRC), core toughness, and effective carburized / nitrided case depth gradient.
Direct-Reading Optical Spectrometer
100% chemical composition verification of alloy steel forgings (20CrMnTi, 42CrMo, 18CrNiMo7-6, Stainless, POM).
Inspection Deliverables with Every Shipment
Complete Batch Traceability & Certified Test Reports
- EN 10204 Type 3.1 Mill Test Certificate (Chemical & Mechanical Properties)
- Zeiss 3D CMM Full Dimensional Inspection Sheet
- Klingelnberg Tooth Profile & Lead Crowning Graph Report
- Effective Carburized Case Depth & Hardness Curve Data
- 100% Pre-Shipment Visual, Thread & Anti-Rust Quality Verification
Our Factory Quality Commitment:
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.
ISO 9001:2015 Certified
DIN 4-7 / AGMA 11-13 Standards
Applications
Custom Spline Shafts and Hubs operating environments.
Confirm load, speed, duty cycle, environment, lubrication, and assembly constraints before selecting the final material and manufacturing route.
- Agricultural tractor PTO (Power Take-Off) drives, implement shafts, and combine gearboxes
- Hydraulic gear pumps, bent-axis piston motors, and hydrostatic transmission drives
- Heavy commercial truck transmissions, drivetrain propshafts, and transfer cases
- Machine tool spindle gearboxes, sliding change-gear mechanisms, and servo actuators
Application Markets
View All 5 Industry Hubs →
Where Custom Spline Shafts and Hubs Are Engineered & Deployed
Discover how this gear category meets extreme torque, low backlash, quiet operation, and weather-resistance demands in primary industry sectors:
🌾 Rugged Heavy-Torque Transmission
Agriculture & Farm Equipment
High-torque bevel gears, spur gears, and splined drive shafts for tractors, harvesters, rotary tillers, and agricultural PTO gearboxes.
🩺 Ultra-Quiet & High-Precision Micro Transmission
Medical & Laboratory
Ultra-quiet, contamination-free micro gears in medical-grade POM, PEEK, and stainless steel for surgical robotics, infusion pumps, and clinical lab equipment.
Technical FAQ
Common questions before ordering custom spline shafts and hubs products.
Critical specifications are confirmed against final drawings before production.
What information is required to reverse engineer a custom spline shaft? ▼
Provide the number of spline teeth, major diameter (tip), minor diameter (root), measurement over pins (with specified pin diameter), shaft length, bearing journal diameters, and the mating internal hub or sleeve if available.
Can ZhongYi broach special non-standard internal splines? ▼
Yes. In addition to our inventory of standard DIN 5480 and ANSI B92.1 broach tooling, we utilize precision wire-EDM (electrical discharge machining) and CNC gear shapers to machine custom internal spline profiles of any tooth count or pitch without expensive tooling lead times.
Why are involute splines superior to traditional keyways for high-torque shafts? ▼
A single keyway introduces high shear stress concentration at the keyway corners, which frequently causes shaft fatigue cracking. An involute spline distributes torque across 10 to 30 teeth simultaneously, increasing torque transmission capacity by over 300% on the same shaft diameter.
24-Hour Engineering Quote & DFM Review
Upload Your Drawings for Custom Spline Shafts and Hubs Manufacturing
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.
Supported CAD Blueprint & Drawing Formats:
STEP (.step / .stp) AutoCAD (.dwg / .dxf) IGES (.igs) SolidWorks / 3D CAD PDF Technical Blueprints Worn Physical Samples
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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