2020 POTD Thread Archive

[erikmannie]

Here is the sleeve in the tubing:

 

[mattthemuppet2]

made a collet rack/ shelf for the mill to put a bunch of useful things in one place. Had fun using a 1" annular cutter making the holes for the ER25 collets. Screwed up some of the stampings, but beat them back into nothing and restamped them. Good enough for me

 

[Superburban]

Love it, especialy the design for the ratchet section.

 

[mattthemuppet2]

thanks! I was tired of having stuff all over the place and in the chip pan, plus I can use some of this stuff (kerosene, mallet etc) on the drill press next to the mill.

Fun fact - whoever cut the plate that I used for the side piece (the shelf is made from a door opener case) managed to cut the sides off square by 3 degrees, which is EXACTLY the angle from vertical of the mill housing How neat is that?

 

[extropic]

@matthemuppet2

First off, nice rack.

Next, I see you didn't go 100% through with the annular cutter.
In another recent thread, someone was asking about the best way to make 1.25 diameter holes in .125 Aluminum sheet.
Some replies recommended using an annular cutter.
One of my concerns, with using an annular cutter on thin stock, is the possibility of the aggressive tooth rake grabbing and lifting/damaging the stock when the cutter breaks through. I understand that a thin workpiece can be sandwiched between sacrificial material to keep it flat, but I see you didn't do that.
I'm wondering why you didn't cut through? Was it to prevent lifting of the aluminum? Or, to save the nice piece of Oak? Or???

 

[mattthemuppet2]

you know all the right things to say

Didn't go all the way through as I didn't want to blunt the cutter on the wood (don't know if that would happen, but..) and that also made it easy to pull the little slugs out of the cutter as they still had a lip on them. Scratched my head for a bit thinking how to get the lip cut, then simply put the sheet in my bench vise and the annular cutter+adapter in my hand drill and it worked a treat. No grabbing, very controllable, and that was with real thin sheet. It would be even easier with thicker sheet to guide the cutter.

 

[tjb]

made a collet rack/ shelf for the mill to put a bunch of useful things in one place. Had fun using a 1" annular cutter making the holes for the ER25 collets. Screwed up some of the stampings, but beat them back into nothing and restamped them. Good enough for me

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Very nice. Amazing how many creative ways there are to store collets and stuff.

 

[extropic]

you know all the right things to say

Didn't go all the way through as I didn't want to blunt the cutter on the wood (don't know if that would happen, but..) and that also made it easy to pull the little slugs out of the cutter as they still had a lip on them. Scratched my head for a bit thinking how to get the lip cut, then simply put the sheet in my bench vise and the annular cutter+adapter in my hand drill and it worked a treat. No grabbing, very controllable, and that was with real thin sheet. It would be even easier with thicker sheet to guide the cutter.

I may have learned something today.
I never would have expected the annular cutter to gracefully finish those holes, using a hand held drill motor.
Thanks for the input.

 

[Ianagos]

I have been practicing scraping for my upcoming rebuild of one of my cnc mills.

I also made a video explaining some of it. I am pretty new to this so I’d appreciate any pointers.

 

[mattthemuppet2]

Very nice. Amazing how many creative ways there are to store collets and stuff.

thanks! I can never have enough flat surfaces in the shop

I may have learned something today.
I never would have expected the annular cutter to gracefully finish those holes, using a hand held drill motor.
Thanks for the input.

You're welcome. I was surprised too, especially given how thin and whippy the material was - I had to hold it with one hand while cutting, so only one hand on the drill. Nervous for the first one and then the rest were easy.