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Interspace Broaches: A Complete Guide

Internal slots, grooves, and interspaces in components like gears, shafts, couplings, and machine parts require high precision machining. Interspace broaches are specifically designed to meet these requirements, providing accurate, smooth, and repeatable internal cuts with minimal post-processing.

At Amit Broaches, we manufacture high-quality interspace broaches used in automotive, aerospace, defense, and industrial machinery, ensuring maximum tool life, performance, and precision.

Interspace broaches

What Are Interspace Broaches?

An interspace broach is a multi-tooth cutting tool designed to create precise internal grooves, slots, and spaces inside bores. Unlike keyway or spline broaches, interspace broaches are optimized for:

  • Wider slot cutting

  • Deep grooves

  • Complex internal profiles

How Interspace Broaching Works

The broach is pushed or pulled through a pre-drilled bore. Each successive tooth removes a small amount of material until the full slot depth and width are achieved

This method ensures:

  •  Uniform groove width 
  • Accurate depth 
  • Smooth surface finish
  •  Minimal tool deflection

Types of Interspace Broaches

At Amit Broaches, we manufacture multiple types of interspace broaches based on application and groove requirements:

1. Standard Interspace Broaches

Used for general internal groove machining in gears, pulleys, and couplings.

2. Custom Groove Broaches

Engineered according to OEM drawings or special slot geometries.

3. Multi-step Interspace Broaches

Designed to cut multiple grooves in a single pass, saving time and improving productivity.

4. Internal Pulley & Slot Broaches

Specialized broaches for pulley keyways and industrial machinery.

5. HSS & Carbide Interspace Broaches

For soft to hardened materials, with optional coatings for extended tool life.

Materials Used in Interspace Broaches

The material selection is critical to performance and durability:

1. High-Speed Steel (HSS)

  • Cost-effective

  • Excellent wear resistance

  • Suitable for general-purpose broaching

2. Powder Metallurgy (PM) Steel

  • Superior hardness and longevity

  • High-volume industrial applications

3. Carbide-Tipped Broaches

  • Cutting hardened materials

  • High-precision applications

Coatings

  • TiN, TiCN, TiAlN

  • Reduce friction and heat

  • Enhance tool life

Manufacturing Process of Interspace Broaches

Precision manufacturing is key to high-quality broaches. Our process includes:

  1. Material Selection – Only certified HSS or PM steel.

  2. CNC Machining – Precise tooth geometry and taper.

  3. Heat Treatment – Ensures hardness and wear resistance.

  4. Grinding & Profiling – Achieves exact slot dimensions.

  5. Coating (Optional) – Improves durability and reduces friction.

  6. Quality Inspection – Tooth profile, width, depth, straightness, and surface finish.

This ensures consistent, reliable performance for industrial applications.

Applications of Interspace Broaches

Interspace broaches are widely used in industries requiring precise internal slot and groove machining:

1. Automotive

  • Gear grooves

  • Pulley slots

  • Shaft interspaces

2. Aerospace

  • Landing gear components

  • Precision machinery parts

  • Engine housings

3. Heavy Machinery

  • Hydraulic cylinders

  • Pulleys and couplings

  • Industrial gear assemblies

4. Defense

  • Weapon and vehicle components with precise internal slots

5. Industrial Equipment

  • Bearings, rollers, and bushings

  • Custom machinery requiring internal groove profiles

Advantages of Using Interspace Broaches

Interspace broaching offers significant benefits:

  •  Single-pass machining for grooves and slots
  • High accuracy and repeatable dimensions
  • Superior surface finish
  • Suitable for high-volume production
  •  Minimal operator skill required
  • Long tool life with proper care
  • Capable of machining soft and hardened materials

How to Select the Right Interspace Broach

Choosing the right interspace broach depends on:

  1. Slot Width & Depth – Determines broach size and type.

  2. Material of Workpiece – HSS, PM steel, or carbide required.

  3. Bore Diameter – Must match broach guide.

  4. Production Volume – Coated broaches recommended for high-volume operations.

  5. Machine Type – Push or pull broach machines affect broach selection.

Amit Broaches’ engineering team assists in selecting the ideal tool based on application and drawings.

Maintenance & Re-sharpening

Proper maintenance prolongs broach life:

  • Inspect teeth regularly

  • Re-sharpen when cutting efficiency drops

  • Use adequate coolant

  • Store in protective cases

  • Avoid excessive force during broaching

We provide professional re-sharpening and reconditioning services for all interspace broaches.

Why Choose Amit Broaches for Interspace Broaches?

  • ISO-certified manufacturing

  • CNC and precision grinding capabilities

  • Custom designs based on OEM drawings

  • Premium HSS, PM steel, and carbide broaches

  • 100% inspection for accuracy and finish

  • Competitive pricing with reliable delivery

  • Expert technical support

Industries trust Amit Broaches for durable, precise, and high-performance interspace broaches.

Conclusion

Interspace broaches are essential tools for producing precise internal grooves and slots in shafts, gears, and industrial machinery. Their accuracy, efficiency, and durability make them indispensable in automotive, aerospace, and heavy machinery industries.

At Amit Broaches, we manufacture high-quality interspace broaches tailored to customer requirements, ensuring superior performance, long life, and precise machining results.

Contact Us

Looking for premium Interspace Broaches?

Call: +91-9814229208
Email: info@amitbroaches.in
Website: www.amitbroaches.in
Location: Punjab, India