+91-9814229208
info@amitbroaches.in
Internal splines are one of the most critical elements in shafts, gears, transmission components, and drive systems. They ensure torque transmission, rotational alignment, and structural stability. To machine perfectly accurate internal splines, industries rely on Spline Broaches high-precision cutting tools designed to cut multiple ridges (splines) inside a bore in a single controlled pass.
At Amit Broaches, we manufacture a wide range of spline broaches used by automotive OEMs, precision machine shops, defense, aerospace, and industrial manufacturers. This in-depth guide explains everything you need to know before buying spline broaches.
A Spline Broach is a multi-tooth cutting tool designed to machine internal spline profiles inside cylindrical holes. Each tooth removes a small amount of material, and the progressively increasing heights of the teeth produce the final spline shape.
Why Spline Broaches Are Used
Internal splines require:
High torque capacity
Perfect tooth symmetry
Accurate pitch
Zero backlash
Smooth finish
Spline broaching delivers all of these with high repeatability.
Types of Splines Machined With Spline Broaches
Spline broaches can cut multiple spline profiles depending on industry requirements:
1. Straight Sided Splines
Most common type, used for power transmission components.
2. Involute Splines
Provide self-centering, smooth torque transmission, and high load capacity.
3. Serration Splines
Used for small shafts, tool fittings, and locking mechanisms.
4. Ball-Broached Spline Profiles
Ideal for light-duty transmissions.
5. Parallel Keyed Splines
Used for shafts requiring precise linear force distribution.
Amit Broaches manufactures all types based on your drawing and application.
Types of Spline Broaches Manufactured at Amit Broaches
1. Push Type Spline Broaches
For cutting splines in softer metals or when machining shorter bores.
2. Pull Type Spline Broaches
Used in heavy-duty industries and for deeper spline machining.
3. Round Broach Style Splines
For specific tools and small internal diameters.
4. Form Broaches
For custom or complex spline patterns.
5. Progressive Spline Broaches
With multiple modules/stages for extremely tight tolerances.
Each broach is engineered for long life and consistency.
Materials Used in Spline Broaches
Spline broaches must maintain tooth strength, precision, and wear resistance. We manufacture in:
1. HSS (High-Speed Steel) – M2, M35, M42
Most economical and durable option.
2. PM Steel (Powder Metallurgy Steel)
Exceptional life and hardness for mass production.
3. Carbide or Carbide-Tipped Broaches
Ideal for machining hardened steels and aerospace-grade materials.
Surface Coatings
We also offer:
TiN
TiCN
TiAlN
AlCrN
Coatings reduce friction, heat load, and wear increasing tool life by 2–4x in many cases.
Manufacturing Process of Spline Broaches at Amit Broaches
To achieve international-level accuracy, we follow a strict multi-stage manufacturing protocol:
1. Material Quality Testing
Only certified premium-grade steel is selected.
2. CNC Machining for Teeth & Profile
Ensures perfect tooth geometry and pitch.
3. Profile Grinding
Done on high-precision grinders to ensure micro-level accuracy.
4. Heat Treatment
Improves hardness and wear resistance.
5. Post-Hardening Grinding
Ensures distortion-free, precise tooth finish.
6. Coating Application
Optional but recommended for industrial production.
7. Quality Inspection
We inspect:
Pitch accuracy
Tooth spacing
Spline angle
Overall straightness
Surface finish
Taper accuracy
These steps ensure your broach performs better, for longer.
Where Spline Broaches Are Used
Spline broaches are essential in industries where torque transmission and alignment are critical:
1. Automotive Industry
Transmission shafts
Steering systems
Gear assemblies
Propeller shafts
2. Aerospace
High-precision splines for landing gears, engines, and control mechanisms.
3. Robotics & Automation
Used in servo drives and precision motion systems.
4. Electric Motors & Gearboxes
Ensuring efficient power transmission.
5. Heavy Machinery
Construction and mining equipment require thick, strong splines.
6. Defense Manufacturing
For weapons, vehicles, and precision mechanical systems.
Advantages of Using a Spline Broach
Spline broaches offer several benefits over milling, EDM, and shaping:
- Single-pass machining
- Fastest method to cut internal splines.
- Highly consistent tooth geometry
- Micro-level accuracy
- Perfect for high-torque applications.
- Ideal for mass production
- Superior surface finish
- Long tool life with proper care
- Minimal operator skill required
- If you need hundreds or thousands of identical spline components, broaching is the best method.
How to Select the Right Spline Broach
Before purchasing, consider:
1. Type of Spline
Involute, straight, serration, etc.
2. Workpiece Material
Hardened steels, carbon steel, aluminum, etc.
3. Bore Size & Length
Determines broach length and style.
4. Application
Torque levels dictate spline geometry.
5. Machine Type
Pull broach machines require stronger tools.
6. Production Volume
High-volume industries should choose coated broaches.
At Amit Broaches, we help customers select the right tool based on drawings and machining needs.
Re-sharpening & Maintenance of Spline Broaches
Proper care can extend tool life by up to 200%.
- Use proper coolant
- Sharpen before tooth damage
- Store in protective sleeves
- Inspect after every cycle
- Use correct broaching pressure
We also provide re-sharpening, reconditioning, and repair services for spline broaches.
Why Amit Broaches Is a Trusted Manufacturer of Spline Broaches
- Over a decade of broach manufacturing expertise
- Precision CNC and grinding machines
- 100% inspection of every tool
- Custom-designed splines as per drawing
- High-performance HSS, PM steel & carbide broaches
- Competitive pricing with long tool life
- Fast and reliable delivery across India
Our tools are used by OEMs, MNCs, and Tier-1 manufacturers across industries.
Conclusion
Spline broaches are essential tools for producing accurate internal spline profiles in shafts, gears, and drive components. Their ability to cut perfectly aligned teeth with high repeatability makes them indispensable for automotive, aerospace, and industrial applications.
At Amit Broaches, we specialize in manufacturing world-class spline broaches engineered for maximum durability, accuracy, and performance. Whether you need standard designs or fully customized spline profiles, our experts ensure flawless results every time.
Looking to order high-quality Spline Broaches?
Call: +91-9814229208
Email: info@amitbroaches.in
Website: www.amitbroaches.in
Location: Punjab, India