Toolpost

This topic has 13 replies, 6 voices, and was last updated 30 May 2011 at 21:16 by Paul Scholey.

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29 May 2011 at 22:25 #69336
Paul Scholey
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@paulscholey17560
I’ve just bought a second hand 4 way tool post to fit on a Myford. I dont know if it was make to fit a Myford but it fits ok but the problem I have is that I can only get a 6mm tool in without it going above centre hight. The bottom of the Toolpost is 10mm thick, I would just like to know how much can I machine of the bottom so that I can fit a larger shank tool without weakening it to much.

Paul.

Edited By Paul Scholey on 29/05/2011 22:26:46
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29 May 2011 at 22:25 #5532
Paul Scholey
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@paulscholey17560
29 May 2011 at 23:06 #69340
Jon
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@jon
Used a Kennametal Top Notch tool turned down to 11.26mm thick for years if that helps. May have used 1/2″ thick which would be 3.3mm thick at bottom.

Depends what steel tool post is from but certainly whack a 20mm milling cutter through in the chuck, 10mm centre height tools will then be smack on line, no shimming.

Or a 3/4″ milling cutter for 3/8″.

Easy enough to make.
30 May 2011 at 09:47 #69346
Beagle
Participant
@beagle
Paul, I don’t suppose this is on an ML10 / Speed 10 is it?

I have the same issue – the OEM Myford 4-way limits you to 6mm tools (or just over, probably 1/4″). I too have been contemplating shaving ~1.5mm off something to open up the world of 8mm tooling, for which there are many more options available.

The question appears to be what to shave the metal off. The OEM toolpost probably doesn’t have much to go at if you are wanting to retain stiffness in tool clamping. I have been contemplating more drastic action of skimming the 1.5mm off the top of the cast iron topslide body, which by contrast seems to have loads of spare material in it. Not decided which approach yet, but I know the toolpost is about £100 off Myford, so maybe finding out the price of a topslide body will make the decision for me!
30 May 2011 at 10:02 #69348
David Clark 13
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@davidclark13
Hi There

I skimmed the bottom off my one.

It was was advertised as taking 1/2 inch tool bits.

I think it now takes 10mm tools.

Ideal for brass as I don’t grind the top.

I skimmed the bottom until it just touched the plunger hole and left it at that.

regards David
30 May 2011 at 11:55 #69360
maurice bennie
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@mauricebennie99556
H
30 May 2011 at 12:01 #69361
maurice bennie
Participant
@mauricebennie99556
Hi. Why not mill out the bottom of the slot to take the tool depth ? I can’t see why that wouldnot work

good luck Maurice.
30 May 2011 at 13:55 #69364
Paul Scholey
Participant
@paulscholey17560
Thanks for the replies, I have measured the distance from the top slide to centre hight and make slightly over 16mm, so if I mill the bottom of the Toolpost down to 6mm I will be able to get a 10 mm cutter in, don’t think I want to go much more.

I did think about the possibility of milling a small amount of the Topslide but was waiting for comments on here. Maybe if I want to fit a half inch tool in it would be better to mill some of the bottom of the cutter?

Its an old ML7 Beagle.

Edited By Paul Scholey on 30/05/2011 13:59:04

Edited By Paul Scholey on 30/05/2011 13:59:52
30 May 2011 at 14:27 #69367
Jon
Participant
@jon
Just mill the slot with 20mm cutter in the lathe if havent a mill- 10mm cr height smack on line.

Found a couple of mine i used to use, just as easy to make from scratch. Have 4 for Harrison 140 as well but use, hex or square head screws, swarf lodges in cap heads or grub screws.

Decent steel ok for 1/2″ square tools but the ML7 really struggles even with a 1hp motor.

Thinning down the actual cutter is defeating the object unless already own. I do admit to doing just that many years ago ie Kennametal from 25mm to 11.26mm high.
30 May 2011 at 14:37 #69368
Jon
Participant
@jon
Just come across this for confirmation http://cgi.ebay.co.uk/MYFORD-7-BOXFORD-TYPE-4-WAY-INDEXING-TOOLPOST-/250823458189?pt=UK_Home_Garden_PowerTools_SM&hash=item3a663e3d8d
30 May 2011 at 14:50 #69369
KWIL
Participant
@kwil
I would not mill the topslide, it may look thick but the amount of metal between the hidden flange of the actual post (which is inserted from below) and the top surface is not that much.
30 May 2011 at 17:05 #69378
Paul Scholey
Participant
@paulscholey17560
Thanks for replies again. I’m not going to mill the topslide. The reason for me thinking about milling the cutters is that the lathe came with a lot of half inch cutters and I have some good quality tipped ones slightly bigger.
30 May 2011 at 20:37 #69401
Beagle
Participant
@beagle
Paul, et al.

For info I went and checked the Speed 10 (ML10) 4-way TP – the bottom portion is 7mm thick. That should give you some confidence that opening your ML7 one up to take a 10mm tool by taking the bottom of the TP down to 6mm thick should just about be ok. i.e. If the Speed 10 TP is originally 7mm thick out of the factory, then taking your ML7 one down to 6mm thick would probably be acceptable.

If you don’t mind me hijacking the post slightly then I’d like to ask if anyone here would recomment the similar mod to the original Speed 10 4-way? To recap previously, it works with 6mm tooling only (I reckon centre height is slightly over at ~6.25mm). I’m really keen to open the door to 8mm tooling as there’s much more available (esp. indexed tools). So do you think I’d get away with taking the bottom of the toolpost from 7mm thick to ~5.25mm thick, or am I treading risky ground?

I guess the issue is a combination of TP stiffness to resist tool chatter, and also to resist against clamp load and the tool leaving the post at a fair rate of knots with my head in the way?!
30 May 2011 at 21:16 #69408
Paul Scholey
Participant
@paulscholey17560
Dont mind at all Beagle, thanks for your help.
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