Tangential lathe tool (again!)

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Tangential lathe tool (again!)

This topic has 13 replies, 8 voices, and was last updated 8 June 2013 at 11:53 by Sub Mandrel.

Viewing 14 posts - 1 through 14 (of 14 total)

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7 June 2013 at 09:27 #121750
Rik Shaw
Participant
@rikshaw
I have been reading a number of threads on here re: tangential lathe tools and have realised that there are various designs out there – some better than others. As I would like to make one I'd like it to be a good'un. So I was quite interested to read this part of a thread in which Chris Stephens refers to his design (which sounds pukkha) and includes photos. Said photos are stated to be there in his album as well. I see no photos at all. Square hole? – sounds like he's dabbling in the dark arts! lol.

**LINK**

Never mind though, can anyone link me to a design which they have made/used and can recommend? I would like to make a grinding jig to go with it as well.

Rik
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7 June 2013 at 09:27 #17097
Rik Shaw
Participant
@rikshaw
Design
7 June 2013 at 09:52 #121755
KWIL
Participant
@kwil
Go to link, click on photos, double click on "latest images" all WORK OK for me
7 June 2013 at 10:19 #121759
Michael Gilligan
Participant
@michaelgilligan61133
Rik,

Same problem here

Chris's "Photos" link to "Page Not Found"

MichaelG.
7 June 2013 at 10:37 #121762
IanT
Participant
@iant
I can't find him in the Albums section at all. Maybe he's removed them?

Ian T
7 June 2013 at 10:53 #121763
Rik Shaw
Participant
@rikshaw
KWIL – Thanks for replying but what link do you mean? —- Rik
7 June 2013 at 11:19 #121766
NJH
Participant
@njh
" I can't find him in the Albums section at all. Maybe he's removed them?"

Yep – I suspect that he has. If you access his profile it states that he has posted one photo so I guess he must have removed all the others.

Chris – the Tangential Tool Evangelist – if you are reading this your pictures are needed!

Regards

Norman
7 June 2013 at 12:58 #121775
John Coates
Participant
@johncoates48577
Posted by Rik Shaw on 07/06/2013 09:27:21:

Square hole? – sounds like he's dabbling in the dark arts! lol.

Rik

Didn't he drill out the mounting for the tool bit then cut some round bar in half and mill out the slots on each side then put the two pieces back together and Loctite the non-clamping side into the drilled hole?

I just followed the article in MEW when I made mine. It's not perfect and I'm going to have another go to make a more cosmetically appealing one but it works and its just so easy to sharpen the tool bit and get it at centre height

John

Edited By John Coates on 07/06/2013 12:59:19
7 June 2013 at 14:00 #121782
Ian S C
Participant
@iansc
Everything seems to be there, except that there are a number of 15 mb PDF's, and I'm on dial up, and with the speed of things, i'd be here waiting next week. Ian S C
7 June 2013 at 23:17 #121833
KWIL
Participant
@kwil
Rik,

I went from your "link" when Chris's post shows click on "1 photo", brings up 7 pages of his photos, take your pick.

K
7 June 2013 at 23:33 #121835
Michael Gilligan
Participant
@michaelgilligan61133
Posted by KWIL on 07/06/2013 23:17:37:

Rik,

I went from your "link" when Chris's post shows click on "1 photo", brings up 7 pages of his photos, take your pick.

K

.

I just tried that, and it brings up 547 pages of [everyone's ?] photos

Confused

MichaelG.
8 June 2013 at 08:38 #121842
IanT
Participant
@iant
That was my experience too Michael.

IanT
8 June 2013 at 08:44 #121843
IanT
Participant
@iant
Thought I'd found the problem – but no – it's still not working for me.

Regards.

IanT

Edited By IanT on 08/06/2013 08:50:18

Edited By IanT on 08/06/2013 08:50:38
8 June 2013 at 11:53 #121855
Sub Mandrel
Participant
@submandrel
In my QCTP article I included a suggested design for a tangential tool holder.

In practice it worked out a bit different. There are pictures below and I can send a pdf of revised (undimensioned but 1:1) drawings to anyone who pm's me their email address.

The thing to watch is the angle of the tool slot. In short, the blank needs a 1/4" slot across the face which is towards the chuck. Before cutting the blank needs to be tilted 10 degrees in the two directions taht wuill create the front and side relief. This gives a different holding geometry to the 'eccentric holders' that requires some fairly small sections so teh holder doesn't foul the work. In practice this doesn't seem to be an issue.

Grinding is easy by eye – just a single grind so the top slopes down and away from the tip. Easiest to do with the tool in the holder.

I used this tool to turn a 4" backplate for a chuck and it worked really well.

Neil
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