# @stem_antics on Instagram

- **Type:** Video
- **Original URL:** https://www.instagram.com/p/DXvArIfPr_B
- **Gondola URL:** https://gondola.cc/posts/64883913-stem-antics-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/4e2b3abe27.jpg
- **Posted:** 2026-04-29T23:47:52.000+00:00
- **Account Owner:** Stem Antics (@stem_antics) — https://gondola.cc/stem_antics

## Caption

Broaching is one of the most precise and efficient machining processes you’ve probably never noticed.

At its core, broaching uses a multi-tooth cutting tool (called a broach) where each successive tooth removes a small amount of material. Instead of a single cutting edge doing all the work, the load is distributed across dozens of progressively taller teeth. This allows the final geometry to be produced in a single pass with extremely high dimensional accuracy and surface finish.

There are two primary configurations: linear broaching and rotary broaching. Linear broaching pushes or pulls the tool across or through a workpiece, commonly used for internal features like keyways, splines, and polygonal holes. Rotary broaching, on the other hand, uses a slight angular offset and rotation to generate shapes such as hex drives in softer materials.

What makes broaching unique is its predictability. Because the tool geometry fully defines the final shape, variability from operator input is minimized. This is why broaching is heavily used in high-volume manufacturing environments like automotive and aerospace, where repeatability is critical.

However, this precision comes at a cost. Broach tools are custom-designed for specific geometries and can be expensive to manufacture. They also require rigid setups and are typically limited to specific production scales where the tooling cost can be justified.

In short: broaching trades flexibility for speed, accuracy, and consistency.

If you’re building or studying manufacturing systems, understanding when to use broaching versus milling, turning, or grinding is a key decision point.

What’s another machining process you want broken down like this? Comment below, remix with your own examples, and share this with someone learning manufacturing fundamentals.

#STEM #MechanicalEngineering #Manufacturing #Machining

## Stats

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## Tags

machining, stem, manufacturing, mechanicalengineering

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