Easy Rotary Broach Tool Grinding

Alternate methods of rotary broach tool grinding. Hex and square broach tools can be made using a lathe, mill or bench grinder

A rotary broach lets you cut internal (and external) features such as a hex, spline or a square into an existing hole. This is very useful to make custom tools.

Rotary Broach build here:
   • Detailed Rotary Broach #TMC2020  
Built for the TMC2020 competition

Plans available here:
https://www.etsy.com/au/listing/83195...
Note; plans are revised based on my prototype, and are subject to change with improvements.

Drop a comment or an email (go to my 'about page' for email address) if you are interested in buying a rotary broach tool or just the tool bits themselves. If I get enough interest, I will make a batch.

Follow me on instagram for behind the scenes and other random stuff
  / tommygun_machining  

Steel used is from Tyne Valley Metals. Check them out for a variety of materials:
https://www.ebay.com.au/str/tynevalle...
  / tynevalleyenterprises  
I plan to do more videos soon where I show where certain steels provide benefit. Stay tuned.

Joe Pieczynski's tool grinding video here:
   • Can You Grind Tools on a Milling Mach...  

Eccentric Engineering (Bench grinder sharpening system and more)
https://www.eccentricengineering.com.au/

Crag's workshop demonstrated a simpler bench grinder method here:
   • Making a rotary broach cutter  

MAKE SURE YOU COVER YOUR WAYS BEFORE GRINDING
I didn't cover my lathe as well as I should have but I made sure to thoroughly wipe everything afterwards