Thread: Home Made Tool Post - A YouTube Clip

nice i also found it interesting. that makes me want to try using my tangible tool holder on my atlas shaper.

Interesting, thanks BT
Naughty boy has the shaper crossfeeding on the cutting stroke.(still I guess on light cuts its not a big deal?)
Whats he doing at 8.25? swaging a hex key socket?

Stuart

Rotary broaching Stu.

Rotary Broaches | Slater Tools, Your Source for Rotary Broaching and Screw Machine Tools

Here is an alternative -

Quick, custom hex sockets

If my memory serves me well, Greg was either getting or had a rotary broaching tool.

BT

what do you call the cutter/bit he is using at the 4:00min mark? Is it for drilling stepped holes?

It appears to be a counterbore.

Thanks Bob. I was wondering about that too. Once you gave the term I could wiki it: Broaching (metalworking) - Wikipedia, the free encyclopedia. I've learned something already and I'm hardly dressed! (Despite its title that link goes straight to rotary broaching.)

Originally Posted by jack620

what do you call the cutter/bit he is using at the 4:00min mark? Is it for drilling stepped holes?

Edit, they said it much better than I.
"Counterbores are rotary cutting tools with a pilot tip to guide cutting lips into hole. They are used to form a recess for a capscrew head or to enlarge a hole without changing its relative position. They are available in a variety of styles and sizes for specific applications"
ICS Cutting Tools - counterbores

Thanks Bryan and Bob.

Stuart

p.s. just how slow do I type? lol

I bought a set of those from CDCO and they certainly come in handy.

Only have the metric set, next order I'll get an Imperial set as well.

Do those sets come with removeable end guides,or are they fixed.
Have you considered just useing a flat bottom drill.

Originally Posted by pipeclay

Do those sets come with removeable end guides,or are they fixed.
Have you considered just useing a flat bottom drill.

They are fixed, at the price of a set of these I certainly haven't considered using a flat bottom drill. They would be harder to use without a guide wouldn't they?

Depends on how you use it.

When I wish to counterbore a hole,I use either my counterbores that have removable guides (just make one up to suit the pilot) if I have a lot to do.

If doing the job in the mill I just use a Slot or Endmill.

If useing a twist drill with flat bottom I pre-drill the start of the counterbore with a normally sharpened drill and then use this short section of pre-drilled hole as the guide for the flat bottom.

Sounds like a lot of extra work and/or tool changes, I might stick to my simple counterbores. The guides are sized for the correct (metric) cap screw, the hole for which is already there, the counterbore part is already the correct size for the cap.

Quick and simple (I like simple)

I bought a set of American made imperial counterbores on Ebay a number of years ago. I have never used them because the counterbored holes are too oversized for any of the applications I've had. Previously, I've done exactly as Peter has done, flattened the end of a drill bit and used it after starting the hole with a normal bit. Nowdays I use a slot drill as a counterbore and use a mill rather than drill press.

I must admit though, a set of metric counterbores would not go astray.

BT

Even the metric set I have is a bit on the big side compared to the metric cap screws I buy, as you can see here

https://www.woodworkforums.com/f65/sc...9/#post1358128

In most cases it is not that critical, but will remember the flat drill idea. Using end mills wouldn't help that much as the sizes I have jump by 1/8" increments or thereabouts in metric.

I do the vast majority of this work on my mill, not the drill press.