CNC Machined Splines Australia
We manufacture custom CNC machined splines to DIN standards. Involute, straight-sided, serrations, hex shafts, D-shafts. All materials — steel, stainless, titanium. Quote in 2 business days.
Spline Types We Manufacture
We machine splines for automotive powertrains, aerospace systems, industrial machinery, and defence applications. Every spline is custom-engineered for your torque and fit requirements.
Straight-Sided Splines
Rectangular-tooth profile. DIN 5482 standard. Easy assembly, low cost.
Involute Splines
Curved-tooth profile, maximum strength. DIN 5481 standard. High-torque applications.
Serrations
Fine-tooth splines for high-holding power. DIN 4156 standard. Precise engagement.
Hex Shafts
6-sided shafts for non-round geometry. Precision grinding available.
Square Shafts
4-sided shafts for right-angle engagement. Custom sizes available.
D-Shafts
Half-round D-profile for clearance applications. Precision machine-to-print.
Multi-Lobe Shafts
Custom multi-lobe profiles for specialty applications. Engineering support included.
Custom Spline Profiles
Non-standard tooth forms for unique requirements. CAD/CAM design support.
Materials Available for Splines
Spline materials are selected for torque capacity, fatigue resistance, and environment.
| Material | Grades | Best For |
|---|---|---|
| Steel | 4140, 4340, 8640 | High-torque, fatigue-critical, standard industrial |
| Stainless Steel | 316, 17-4 PH | Corrosive environments, marine, hygenic |
| Titanium | Grade 2, Grade 5 | Extreme weight reduction, aerospace |
| Aluminium | 7075-T6 | Lightweight non-critical applications |
| Brass | C36000, Naval | Low-friction, non-magnetic, corrosion-resistant |
Industries We Serve
Automotive & Powertrains
Aerospace & Defence
Industrial Machinery
Agriculture & Equipment
Robotics & Automation
Marine & Subsea
Manufacturing Capabilities
Spline Hobbing and Broaching
Precision external and internal spline cutting. Involute, straight-sided, and serration profiles.
- ✓ External spline hobbing
- ✓ Internal spline broaching
- ✓ DIN 5481/5482 standard
- ✓ Precision tooth form
Hex and D-Shaft Grinding
Precision grinding of hex and D-profile shafts. Tight tolerance grinding for assembly fit.
- ✓ Hex shaft grinding
- ✓ D-shaft grinding
- ✓ Tolerance ±0.01mm
- ✓ Surface finish Ra 0.4µm
Spline Inspection and Verification
CMM inspection of involute profiles, pitch, and fit validation. Complete traceability.
- ✓ Involute profile verification
- ✓ Pitch and concentricity control
- ✓ CMM measurement
- ✓ Inspection certificates
Quality Assurance
- ✓CMM inspection of involute and straight-sided profiles
- ✓Pitch and tooth spacing verification to DIN 5481/5482
- ✓Concentricity and runout control ±0.01mm TIR
- ✓Fit tolerance validation against your assembly requirements
- ✓Material certificates and hardness testing available
- ✓First-piece inspection and inspection certificates
Lead Times & Quantities
Simple splines ship within 7–12 days. Complex or involute splines may take 12–20 business days.
Straight-Sided
7–12 days
Standard DIN profile, quick turnaround
Involute Splines
12–20 days
Complex hobbing, precision inspection
Hex & D-Shafts
7–10 days
Grinding operations, tight tolerance
Spline Machining FAQ
What spline standards do you manufacture to?
We manufacture splines to DIN 5481 (involute), DIN 5482 (straight-sided), and DIN 4156 (serrations). We also produce custom spline profiles for non-standard applications. Involute splines are most common for high-torque shafts. Straight-sided and serrations are used where ease of assembly or low-cost is important.
What materials are best for high-torque splines?
Steel 4140 and 4340 are standard for high-torque applications — they provide maximum shear strength and fatigue resistance. Stainless steel 17-4 PH is used where corrosion resistance is required. Titanium is used for extreme weight reduction in aerospace. Material is matched to your torque load and speed requirement.
Can you manufacture internal and external splines?
Yes. External splines are cut on the OD of shafts using hob machines. Internal splines are broached or shaped into hubs and rings. Both internal and external splines can be held to tight fit tolerances for premium sliding or driving fits.
What is the typical lead time for custom splines?
Standard straight-sided splines typically ship within 7–12 business days. Involute splines with tight tolerances may require 12–20 business days. Lead time includes design review, hobbing or broaching, and CMM inspection. Expedite options are available.
What tolerances can you hold on spline fits?
We hold spline tolerances to DIN 5481 precision classes h9/js9 (sliding fit) and h8/js8 (driving fit). Involute profiles are held to ±0.02mm. Tooth spacing is controlled to ±0.01mm on the PCD. Custom fit classes can be specified for your application.
Do you offer spline inspection and certification?
Yes. We perform CMM inspection of involute profiles, pitch, concentricity, and runout. Spline form and spacing are verified against your engineering drawing. Inspection certificates and material certs are available for all spline products.
Get a Quote for Custom Splines in 2 Business Days
Upload your spline spec or drawing and receive a quote for DIN-standard splines. All types, all materials.
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