Push Broaching vs Pull Broaching: Which Process is Better?

When setting up a broaching operation, one of the fundamental decisions manufacturers face is choosing between push broaching and pull broaching. Both processes use the same graduated-tooth cutting principle, but they differ in the direction of force applied to the broach — and this difference has a significant impact on tool design, achievable length, precision, and the type of applications each process suits best.

In push broaching, the broach is pushed through or across the workpiece, meaning the tool is under compressive load throughout the cutting stroke. Because compressive force can cause a long, slender broach to buckle, push broaches are generally kept shorter and more robust in cross-section than their pull-type counterparts. This makes push broaching well suited to simpler profiles, shorter cutting lengths, and applications where the broach doesn't need to remove a large amount of material in progressive stages. Push type broaching machines are often more compact and can offer faster cycle times for straightforward operations, making them a popular choice for keyway broaching, small spline profiles, and general-purpose tooling in workshops handling varied, lower-complexity jobs.

Pull broaching, by contrast, pulls the broach through the workpiece under tension rather than compression. Tension keeps the broach straight and stable throughout the cut, eliminating the buckling risk associated with push broaching. This allows pull broaches to be manufactured significantly longer, with more teeth and a more gradual, multi-stage cutting progression — resulting in superior surface finish, tighter tolerances, and the ability to cut more complex profiles in a single pass. Pull broaching is the preferred process for demanding internal broaching applications such as involute spline broaches, aerospace components, and any job where precision and surface finish are the top priority.

So which process is better? The honest answer is that neither process is universally superior — each is suited to different applications. Push broaching offers simplicity, compactness, and speed for shorter, less demanding profiles, making it a cost-effective choice for many general engineering and keyway-broaching applications. Pull broaching offers superior precision, surface finish, and the capacity for longer, more complex cutting sequences, making it the preferred choice for high-precision components in automotive, aerospace, and other critical applications.

The right choice ultimately depends on your component's complexity, required tolerance, production volume, and existing machine infrastructure. Manufacturers producing a wide range of components often maintain both push type and pull type broaching capability, selecting the appropriate process on a job-by-job basis to balance cost, speed, and precision.

Steelmans Broaches manufactures both push and pull type broaches and broaching machines, giving manufacturers the flexibility to choose the process best suited to each component's requirements. To discuss which broaching process fits your application, visit Steelmans Broaches