Making a simple Rotary Broach Tool

[@homemadetools]

Excellent! We shared this video on our homemade tools forum this week 😎

[@daveb3910]

Cool project. You may want to lower your top end on the audio though, it's a little harsh. My wife thought it was raining from the background highs

[@goldagent77]

Good project Papa

[@rjordans]

Great project!

[@airsystems]

Excellent! Thank you!

[@valanjo2001]

Parabéns pelo excelente trabalho.
Vou confeccionar esta ferramenta.

[@davidrule1335]

Tightening up on that parrell strap contraption. It just like putting your gauge blocks in a vice. I'll bet they don't ring anymore.

[@hulkaplasta6558]

VERY NICE

[@ToBeeOrNotToBeHoney]

Nice video, I would love to hear some narration along with it.

[@billzweig]

Sorry, English is not my first language (forth, actually) and while being fully proficient in it, I am always a bit self-conscious about my accent and pronunciation.

[@ToBeeOrNotToBeHoney]

@@billzweigI understand. Personally I enjoy hearing other people's accents. Heck I can barely speak one language so am not in any place to judge your pronunciation. As I said I enjoyed the video, but it would be nice to have a voice to go along with it!

[@cywineloziom]

@@billzweig hej. Możesz podać adres e-mail do kontaktu. Mam kilka pytań. Pozdrawiam.

[@billzweig]

@@cywineloziom [e-mail]

[@landlockedviking]

Man you have a great collection of tools! What's the max capacity of the broacher?

[@mosfet500]

Thanks for this Bill, it will save me work calculating proper angles.
I'm making one but using smaller bearings. One thing, on your dimension sheet you show a dimension of 41.6mm. I'm not sure where the two points of this dimension are. It looks like this dimension is not needed but I wanted to check with you in case I'm wrong. Also, what's the optimal tip protrusion?
Thanks for your time and help.

[@billzweig]

The 41.6 is the initial bore diameter machined concentric with the outside during the turning of the body. It can be smaller as the actual size is not important - it is just to make the final, 47mm angled bore easier to bore. The tool protrusion is adjusted so the tip will cross the axis of rotation at that point - the tip is just wobbling without ascribing a circle. So the amount of protrusion is determined by the rest of the geometry; the angle and the offset from the centre.

[@mosfet500]

@@billzweig Thanks for the reply Bill, I appreciate it. I have all the parts to make mine now.

[@adamsz5759]

Super travail, comment t'as adapter microscope a ta fraiseuse ???

[@billzweig]

This is the original "Moore" centring microscope used on my "Moore" jig borer. Can be used on a milling machine as well.

[@naushilb]

Hello, are you able to share the design files for your project? Thanks!

[@tempest411]

Making a Simple Rotary Broach Tool. Step 1: buy $80,000.00 worth of machine tooling and set it all up in a shop in your $750,000.00 home.

[@davidng1105]

Where did you get the er20 collet chuck? Rather difficult to find an c20 er20 l50 chuck. Did you consider using a double row angular contact bearing instead?

[@billzweig]

Collet chucks are quite inexpensive, got it from Aliexpress. Accuracy here is not that important. A double row angular contact bearing could work, however the axial force is considerable in this application and taper roller bearing is not more expensive.

[@davidng1105]

@@billzweig So silly question, but did you cut the shaft length down off a longer chuck?

[@billzweig]

@@davidng1105 Yes, the shaft was parted on a lathe. It is usually quite hard but carbide tool will have no problem.

[@tranphihung3879]

Đèn màu vàng nhìn thấy mờ quá không ok

[@adamsz5759]

Quelle est référencé de ce microscope ???

[@clintchapman4319]

You can't even show the machining? Geez...