Rotary Broaching Tools

Precision rotary broaching tools for Swiss-type lathes and CNC lathes, designed for producing hexagonal, Torx, square and custom internal profiles.

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Rotary broaching tools for hex, Torx and square internal profiles on Swiss-type and CNC lathes

How Rotary Broaching Works

How does rotary broaching work?

Rotary broaching uses a broach held at a slight angle to the workpiece centerline. This creates a controlled wobbling action, allowing the cutting edges to progressively form the internal profile as the tool feeds into the workpiece.

01
Prepare the Hole
A pilot hole is drilled to the required diameter and depth before broaching.
02
Angled Broaching Action
The slight angular offset creates the rotary broaching action, so the cutting edges engage progressively rather than all at once.
03
Form the Internal Profile
As the broach feeds axially into the workpiece, the required polygon or special internal profile is produced.
Typical Profiles
Hexagon Torx / Star Square Custom Profiles

Product Range

Explore Rotary Broaching Tools

Choose a standard internal profile or send us your drawing for a custom form. Each page includes dimensions, material information and quotation details.

Hexagonal rotary broach for internal hex profile machining
Internal Hex Standard Stock

Hexagonal Rotary Broaches

Standard AF sizes from 0.93 to 10.1 mm for precision internal hex profiles.

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Torx star rotary broach for internal six-lobe profile machining
Six-Lobe Profile Standard Stock

Torx (Star) Rotary Broaches

T4–T50 six-lobe tools for accurate internal star-shaped drive profiles.

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Square rotary broach for precision internal square profile machining
Internal Square Made to Order

Square Rotary Broaches

Made-to-order square profiles from 1.0 to 10.0 mm for CNC and Swiss-type lathes.

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Custom special form rotary broach manufactured to customer drawing
Special Profiles Made to Drawing

Custom Rotary Broaches

Splines, serrations, multi-lobe forms and special internal profiles made to drawing.

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Rotary Broach Materials & Application Guide

PRONIXT rotary broaches are designed for producing hexagonal, Torx, square and custom internal profiles on Swiss-type lathes and CNC lathes. Standard tools are manufactured from ASP23 PM-HSS and supplied with TiCN coating for a practical balance of edge strength, wear resistance and repeatable machining performance.

STANDARD TOOL MATERIAL

ASP23 Powder Metallurgy High-Speed Steel

ASP23 PM-HSS combines a fine, uniform structure with high wear resistance and toughness, helping the cutting profile withstand repeated loads during internal rotary broaching. Tool material, coating and geometry can also be evaluated for custom applications.

Heat-Treated Hardness HRC 64–66
Standard Coating TiCN PVD
Optional Coating TiN PVD
Tool Type Precision Rotary Broach

Applicable Work Materials

Carbon Steel Alloy Steel Tool Steel Stainless Steel Aluminum Alloy Brass Titanium Alloy

Tool selection depends on profile size, broaching depth, workpiece hardness and machining conditions. Hardened steels, titanium alloys and other demanding materials require application review before quotation.

Tolerance & Precision

Available tool dimensional tolerance ±0.01 mm
Shank tolerance h6
Manufacturing process Precision Grinding
Custom profile tolerance Confirmed by Drawing

Coating Options

TiCN — Standard Stock Coating
Blackish PVD coating used on standard tools for improved wear protection in precision rotary broaching applications.

TiN — Custom Coating Option
Gold PVD coating available upon request for selected materials and made-to-order applications.

Coating selection can be reviewed according to the workpiece material, profile geometry and machining conditions.

Rotary Broaching Application Guidelines

01
Prepare the pilot hole. Use a correctly sized pre-drilled hole before internal broaching.
02
Allow sufficient hole depth. Extend the pilot hole beyond the required profile depth to allow space for chip accumulation.
03
Provide a suitable lead chamfer. Correct entry preparation promotes smooth engagement and reduces unnecessary cutting load.
04
Confirm machining conditions. Select speed, feed and coolant according to material, profile size, holder setup and machine rigidity.
Application Note: Pilot-hole size, entry chamfer, depth allowance, holder alignment and machine rigidity all affect the finished profile. Send us your drawing and machining conditions for demanding or special applications.

Need Help Selecting or Customizing a Rotary Broach?

Send the required profile, AF or Torx size, broaching depth, workpiece material, machine model and quantity. We can review standard sizes, special profiles and made-to-drawing requirements.

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