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[Project 3] Dickson T1 Tool Holder

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KWIL23/05/2020 12:36:45
3309 forum posts
63 photos

Lee,

The block was held in a very substantial vice, initial 45 degree set by angle guage, then checked using contact probe at two points in vertical and horizontal plane. As said above, 45 degrees is 1 in 1 slope, so with zeroed probe you should get an equal vertical movement for each horizontal movement. If not you just have to tap adjust until you do, tighten and try again.

Only suitable for one off making not mass production.

Lee Jones 624/05/2020 19:00:46
163 forum posts
104 photos
Posted by KWIL on 23/05/2020 12:36:45:

The block was held in a very substantial vice, initial 45 degree set by angle guage, then checked using contact probe at two points in vertical and horizontal plane. As said above, 45 degrees is 1 in 1 slope, so with zeroed probe you should get an equal vertical movement for each horizontal movement. If not you just have to tap adjust until you do, tighten and try again.

Only suitable for one off making not mass production.

Ah yes, I see. Thanks for getting back to me. I'll add the 1:1 technique to my toolbox.

Lee Jones 624/05/2020 19:05:03
163 forum posts
104 photos
Posted by Martin Connelly on 22/05/2020 18:58:38:

Lee, did you see this by John Baron on the Cutting a 45 degree V thread page 1? There was also a suggestion somewhere to cut a narrow slot first then cut the vee. This is how some of the purchased ones I have had their vees cut (the slot that is, not the 45 degree cutter part).

Martin C

Hi Lee, Guys,

Whilst your picture shows one way of getting a 45 degree angle, its not a good way of holding work for milling. My recommendation would be to buy a proper inverted cutter and secure the work to the mill table properly. At a pinch you could use a 45 degree HSS or carbide countersink and take it easy with the cut.

I did see both of those posts, thank you.

Not overly keen on using a countersink for this.

Seen some 45 degree side cutters and was considering something like THIS.

I think I'm going to go for a sine plate, 'cos why not (and I think I'll get use out of it beyond this project).

Lee Jones 624/05/2020 19:25:47
163 forum posts
104 photos

Detour: [Project 4] Sine plate

JasonB24/05/2020 19:26:47
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Those insert cutters won't work as you need to get down into the bottom of the Vee, you need something that goes almost to a point if using an angled cutter.

A few suggested a shaper for these types of jobs, this popped up on my Youtube today which you may enjoy.

Edited By JasonB on 24/05/2020 19:29:13

Lee Jones 624/05/2020 19:52:19
163 forum posts
104 photos

Actually the bottom of the 'v's are quite blunt:

img_20200521_145633.jpg

That cutter with those inserts was just a quickly Googled example.

I'm sure you can pick-up sharper cutters.

JasonB24/05/2020 20:10:37
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Lee that cutter will swing an inverted flat ended cone about 25mm across, So when used to cut the larger side of the Vee it will completely remove the smaller side, you need something that will cut like the red line, maybe 1mm at the bottom.

dsc03947.jpg

Lee Jones 624/05/2020 20:36:57
163 forum posts
104 photos

Turn the work 45 degrees - put it on its side.

John Baron24/05/2020 20:39:05
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Hi Lee, Guys,

A 90 degree HSS or Carbide countersink will easily cut those "V" slots. The reason I said to take it easy with the cut, is that the shaft size on some of the counter sink bits may only be 1/4" diameter. As are some of mine. I have a nice six flute one that would do the job at full depth because it is on a 20 mm shank and is only 25 mm diameter. I've got that one in a plastic handle and use it for deburring holes.

Lee Jones 626/09/2020 07:46:57
163 forum posts
104 photos
Posted by JasonB on 22/05/2020 12:43:18:
Posted by Lee Jones 6 on 22/05/2020 08:21:14:

How does 0.1mm over 480mm sound?

As nobody else has answered from last night I get about 1/10th of that in X&Y eg 0.003mm in 140mm on a Chinese machine.

What do you measure with to gain that level of accuracy?

I tried to use a 10ths/inch indicator which measures 6 10ths/inch over 480mm.

Although it's hard with my setup as it's not 100% rigid. Might end up making something else.

JasonB26/09/2020 07:53:00
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I swing a lever DTI in a collet chuck at 70mm radius only a 0.01mm one but easy to see that the needle only moves part of a division

Lee Jones 626/09/2020 07:55:15
163 forum posts
104 photos

Ha, that's cheating. laugh​​​​​​

Do you have a picture of your setup/shaft (no, I will not rephrase cheeky)?

JasonB26/09/2020 08:06:30
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Michael Gilligan26/09/2020 08:09:13
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Posted by JasonB on 24/05/2020 19:26:47:

.

A few suggested a shaper for these types of jobs, this popped up on my Youtube today which you may enjoy.

.

Missed that, yesterday, Jason

The opening ‘titles’ are sheer joy ...

I shall watch it with due reverence, later.

MichaelG.

Lee Jones 626/09/2020 08:28:02
163 forum posts
104 photos

Ah, so you have a bought holder.

Maybe that'll work better than my janky Heath Robinson setup.

Meunier26/09/2020 16:02:40
355 forum posts
5 photos

Following on from Jason's shaper video which I found most interesting was this automotive manufacturing video from 2008. Particularly liked the crankshaft forging part starting at 8:08 (can you guess yet what this lump will become ? )
DaveD

The interesting parts start at 2:00 in

Edited By Meunier on 26/09/2020 16:04:33

Meunier26/09/2020 17:28:37
355 forum posts
5 photos

Complete fail ! here is the missing link to the video mentioned...

https://www.youtube.com/watch?v=Uv30kAL2D1c

DaveD

Lee Jones 629/09/2020 14:27:06
163 forum posts
104 photos
Posted by Lee Jones 6 on 26/09/2020 08:28:02:

Ah, so you have a bought holder.

Maybe that'll work better than my janky Heath Robinson setup.

Received mine today from 'you know who'. It's soooo tiny!

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