Parting off Blades

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Parting off Blades

This topic has 23 replies, 10 voices, and was last updated 27 March 2012 at 13:46 by Ian S C.

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8 January 2012 at 16:41 #5845
Bob Perkins
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@bobperkins67044
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8 January 2012 at 16:41 #81598
Bob Perkins
Participant
@bobperkins67044
This is my SIEG SC4 tool post parting off blade holder. I haven’t used this yet and am looking for a blade. The slot is 14.2mm and when the clamp is tightened it closes to 13.2mm. So it will not clamp a 1/2″ tool and a 5/8″ tool is too large?? I am assuming that the parting off blade fits directly into the holder? does it need to be packed to clamp a 1/2″ tool” Should I mill out the slot to fit a 5/8 blade? I would be interested to hear if anybody else has had this issue, and how you have resolved it.

Thanks

Bob..
10 January 2012 at 13:19 #81679
Bob Perkins
Participant
@bobperkins67044
Any comments or advice gents?
10 January 2012 at 13:19 #81680
Bob Perkins
Participant
@bobperkins67044
Any comments or advice gents?
10 January 2012 at 15:09 #81687
DMB
Participant
@dmb
Hi Bob,

Try going back to the business that supplies this mill (Arc Euro??) and ask for advice, even if you did not buy new. If its A.E., speak to Ketan. If its Warco, speak to Roger Warren. I have purchased goods from both in the past and found both of them very pleasant to deal with.

Good luck. Regards,

John.
10 January 2012 at 17:11 #81690
Ketan Swali
Participant
@ketanswali79440
Hi Bob,

Dont know about this holder.

As we do not do the SC4 at present, I am presuming you have purchased this from Chester or Axminster? …What do they say?

I dont think we do a blade which will meet your needs for this particular toolpost.

Ketan at ARC.
10 January 2012 at 18:21 #81695
chris stephens
Participant
@chrisstephens63393
Hi Guys,

If you are really stuck for a blade why not grind or mill down the next size up till it fits.It is perfectly possible to do the milling with a carbide end mill, as many of the members here now know.

A word of caution, because the edges are angled it is never quite the size you think. So check that you are measuring correctly.

chriStephens

PS. I was only milling a parting blade yesterday for the new design of parting holder. As I have said on other posts it does show great promise. I had great difficulty making it grab but once I did, all that happened was it slid the blade down out of harms way, instead of breaking it. Oh, and if you want to know how I got it to grab the answer was to not use any lubricant. The new, new version should help all the turners who think that the only way to part is with a rear tool post but do not have one. Further testing is required on a less than rigid lathe, unfortunately something I don’t have.

PPS the holder in the picture looks a reasonable design, just the right amount of top rake. Whether it is any good or not will show itself once a blade is obtained.

PPPS Before measuring the size of blade needed I hope you are moving the clamping block fully to the left , as the picture has it in the tightened position, at least it is if it is of the design that I think it is.

Edited By chris stephens on 10/01/2012 18:25:18

Edited By chris stephens on 10/01/2012 18:25:41
10 January 2012 at 19:49 #81705
_Paul_
Participant
@_paul_
Before I bought commercial tool steel for my AXA (Aloris type) parting tool holder (which seems to be the same design as yours) I made my own from an old TCT saw blade.

My circular saw blade had several damaged teeth as a result of meeting a masonry nail embedded in some used timber I was cutting, this left an almost new blade with still many good teeth left.

I’m not sure where I read it it might have been on this board or perhaps HSM someone had cut up a saw blade into the right size to fit thr “AXA” tool holder and used it as a parting blade.

I found it worked fine the only slight problem was the shape which had an angled end, five minutes on a diamond lap and I had a flat(er) profile which worked fine and is still in use today on hard materials.

It’s quite easy to cut the steel part of the blade with a good hacksaw.

I have a stock of these things now at “zero” cost as the blade was unusable and destined for the scrap bin.

Regards

Paul
10 January 2012 at 20:49 #81714
Bob Perkins
Participant
@bobperkins67044
Thanks for the advice all. The tool holder came from Axminster, and I believe is a SIEG product. I have e mailed both for their comments, and will update my post when I get a reply. Preference at present would be to look at modifying the holder. I think it will stand removing a couple of mm of the bottom of the tool slot. It will then hold a standard 5/8 blade.

Bob..
16 January 2012 at 13:45 #82226
Bob Perkins
Participant
@bobperkins67044
An update on my tool holder. After a couple of emails and a link to my forum post, Daisy from SIEG has identifed the tool holder as one of their’s, and advised me that a I need a 14mm x 2mm parting tool. They to not supply these, but she assures me that they they should be “easy to find in this country”.

I’ve had a bit of a google and can’t come up with one. Any suppler suggestions?

I’ve asked them for a uk supplier and part number.

Disappointingly, after a couple of emails I’ve not received any response at all from Axminster, where I bought it.
16 January 2012 at 14:34 #82228
chris stephens
Participant
@chrisstephens63393
Hi Bob,

Why not grind/mill down a standard 5/8″ ,or get someone, to 14mm (9/16″ or thereabouts).

At this point I do take it that you plan not to be beaten by this minor set back (commercial ineptitude). Are you going to Ally-Pally, if so take some calipers and rummage on the used tool stands. Good quality new blades are horrendously priced but S.H. ones are much cheaper and can still have a lot of life left in them, once you learn how not to snap the ends off. Old blades are likely to be of better quality than some “far eastern imports”, where the “high speed” in HSS only refers the speed at which you throw them at the wall.

chriStephens
16 January 2012 at 20:11 #82251
Bob Perkins
Participant
@bobperkins67044
Thanks Chris

Last resort is to mill out the holder to take a standard 5/8″ tool. I’m not going to Ally-Pally. I’m new to this and have not been to a show. There is a show advertised at the Bath and West show ground in March. I plan to visit this and am looking forward to a rummage, and hopefully some show deals.

Bob..
19 January 2012 at 08:24 #82433
jomac
Participant
@jomac
Bob hi, in the photo it looks like the thickness of the space for the blade is quite big so what is the maximum thickness blade that will fit, Ebay has heaps of cut off blades from engineering sites, that might fit, Another thought, was that Ramon Wilson made his own milling slot cutters, for his ED engine, out of guage plate, but old saw blades make cheap HSS tools.

John Holloway
22 January 2012 at 01:34 #82679
Billy Mills
Participant
@billymills
Went to the AP show yesterday and watched Chris use his new tangential parting tool. Totally convincing demo, one smooth continuous ribbon , a fast feedrate and no hint of chatter. It also has the advantage of putting the cutter in compression when cutting so if the tool digs in it will kick the tool downwards and free itself. Next on list to make type tool.

Very much hope that Chris will write up this tool, it looks easy to make and very easy to use. I would also add a plea to include Chris’s clever method of making square slots for his other Tangential tool. Nice to see the circle drawing tool in use too! Great stuff from the SMEE once again.

Billy.
22 January 2012 at 08:28 #82683
Springbok
Participant
@springbok
Hi Billy

Try this site

http://www.projectsinmetal.com/

It is American but tangenital tools aremanufactured in Australia. think chris is the UK distributor

http://www.eccentricengineering.com.au/

This is also a must site for anyone interested in makeing tooling.

Bob

Edited By Springbok on 22/01/2012 08:48:43
22 January 2012 at 09:17 #82684
michael howarth 1
Participant
@michaelhowarth1
Went to the AP show yesterday and watched Chris use his new tangential parting tool. Totally convincing demo, one smooth continuous ribbon , a fast feedrate and no hint of chatter. It also has the advantage of putting the cutter in compression when cutting so if the tool digs in it will kick the tool downwards and free itself. Next on list to make type tool.

Did anyone make a video ?

Edited By mick H on 22/01/2012 09:17:27
22 January 2012 at 09:39 #82685
michael howarth 1
Participant
@michaelhowarth1
And congratulations Chris…..from a germ of an idea on 30th December to a public demonstration in 20 days is pretty impressive.

Edited By mick H on 22/01/2012 09:40:23
22 January 2012 at 10:24 #82688
chris stephens
Participant
@chrisstephens63393
Hi Guys,

Just a quick reply before I rush off to the show,again. I am not the UK distributor and have NO connection with any commercial tooling suppliers. Most of my tooling is self made, to mean to buy any, and I try to persuade people to get away from “cheque book engineering” and have a go at making things themselves.

Thanks Guys for the kind words, but as I have said before “flattery will get you nowhere, I am too used to it ” but it is nice to be appreciated.

chriStephens

Edit;

OOPS, sorry guys for not giving credit to those who inspired the latest toys, “Thanks chaps” and have you got anymore ideas I can play with?

Edited By chris stephens on 22/01/2012 10:28:51
22 January 2012 at 17:33 #82711
Billy Mills
Participant
@billymills
More ideas after you write up the parting tool Chris, A lot of people are not happy parting off- your new tool could make them much happier turners and reduce hacksaw sales and accidents to beds. When people see and understand the method would imagine that commercial copies will quickly follow. Wonder if DC1 had a look today?

Bob- sorry that this new idea is a bit mysterious if you have not seen the tool slice through metal but I do hope that Chris can get it into print so that the idea can spread.

Billy.
22 January 2012 at 19:49 #82717
chris stephens
Participant
@chrisstephens63393
Hi Billy,

You chaps will have to wait awhile for a write up. Although the tool worked fine on a Myford at Ally-Pally I want to try it on a few other lathes to make sure it lives up to expectations. I also want to test it with someone who has difficulty with parting just be sure it not just me that can use it successfully. It would not look good if someone makes a copy and it does not work for them. I only like to recommend things that I know to work. Now the laser circle projector is another matter, that is guaranteed to work. Whether you can drill accurately is another matter.

I hope all who saw the various bits I was demonstrating enjoyed the show and that they had their eyes opened to something just a little different to the norm.

chriStephens
22 January 2012 at 22:30 #82748
Bob Perkins
Participant
@bobperkins67044
Thanks for the recent posts. I will admit I’n now very curious re. Chris’s
tangential parting tool. I’ve added some photos that I’ve received from SIEG which seems to convert it into a 1/2″ square tool holder??
23 January 2012 at 00:01 #82752
chris stephens
Participant
@chrisstephens63393
Hi Bob,

All will be revealed in the fullness of time, but it looks nothing like your pictures.

As the battery charger for my camera is hibernating for the winter, well it’s hiding itself somewhere till the spring clean(?), I can’t post any pictures so if any of you chaps who photographed it care to post, feel free.

chriStephens
27 March 2012 at 13:20 #88012
Bob Perkins
Participant
@bobperkins67044
I finally resolved my parting tool holder query yesterday. The supplier replaced my SIEG tool post with a SOBA tool post. It seems a lot more solid. I had to bore the base out a bit to fit the SIEG spindle, which was the first time I used my face plate. I had to remove the safety guard to enable the face plate to rotate. I then had to remove it's mounting spindle to allow the bolt heads on the clamps to clear. I didn't need to bypass the shut down microswitch, whih allows the lathere to run with all this taken off. Guess I'll leave it all off now.

Bob..
27 March 2012 at 13:46 #88014
Ian S C
Participant
@iansc
Good idea Bob, I think for most stuff I do anyway, the gaurd would just get in the way, mind you , my lathe never had one. Glad you sorted the tool post. Ian S C
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