Indexing tool types, I'm confused!

Indexing tool types, I'm confused! - Printable Version

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RE: Indexing tool types, I'm confused! - Old Minger - 01-07-2017

Thanks for all the input fellas. Ill take your advice and buy a quality right hand tool that takes CCMT inserts.

Ed, Darren,
The max size tool a standard Myford quick change tool holder can handle is 10mm without any modification. It's the tool height on centre which is the limiting factor. You can clamp a 1/2" (12mm) tool in the holder without any problem but then the tool tip is too high. It would seem the thing to do is milli/grind a small relief in the tool holder which lowers it enough to centre the tip without affecting the performance. Rightly or wrongly I thought it would be best to go to 1/2" tooling for the rigidity. I've ordered some tool holders and will get them modified to take the 1/2" holders when I get back. If only I had a Bridgeport!

Talking of which, I've had an interesting old time with the Bridgeport over the last week or so, I've made some classic novice 'Cock Up's' and will update the thread over the weekend.

Once again thank you to everyone for the information.

John

RE: Indexing tool types, I'm confused! - Old Minger - 01-07-2017

I know it's a left hander but is this the sort of tool I should be looking out for?

http://www.ebay.com/itm/SANDVIK-SCLCL-12-3B-LATHE-TOOL-GROOVING-W-24-CARBIDE-INSERTS-/311766997628?hash=item4896c2da7c:g:cz4AAOSwa~BYN5PP

RE: Indexing tool types, I'm confused! - Mayhem - 01-07-2017

Ed has just posted a pic of the toolholders I refer to in the "latest delivery" thread. The one you linked to uses the insert I was talking about.

Be careful when modifying the tool post, as you may end up will less rigidity. Can you post a pic of the tool holder?

RE: Indexing tool types, I'm confused! - Old Minger - 01-07-2017

(01-07-2017, 07:37 PM)Mayhem Wrote: Ed has just posted a pic of the toolholders I refer to in the "latest delivery" thread. The one you linked to uses the insert I was talking about.

Be careful when modifying the tool post, as you may end up will less rigidity. Can you post a pic of the tool holder?

Here you go Darren! this is what i'm on about.

https://www.youtube.com/watch?v=8IzKCXwjjsM

I recommend you don't watch it all as you could end up in a coma, the last minuet of the video shows all. This bloke reminds me of my old Physics teacher, no wonder i could never stay awake in class!

John

RE: Indexing tool types, I'm confused! - Vinny - 01-07-2017

coma is right! If it were me, I think I'd have modified the compound.

RE: Indexing tool types, I'm confused! - EdK - 01-07-2017

(01-07-2017, 07:07 PM)Mayhem Wrote: To start with, you might be better off to get some HSS blanks and grind your tools. You can do this on your belt sander.

+1

Ed

RE: Indexing tool types, I'm confused! - Vinny - 01-08-2017

Last nite I was nosing around on ebay for an SCLCR holder and came across these. One's a 10mm shank the other is 12mm. The 12mm with 10 inserts was about $14 (Chinese, I know) and the 10mm with one insert was ... ready for this?: One cent.

10mm:
[Image: 1010.jpg]

12mm:

RE: Indexing tool types, I'm confused! - Old Minger - 01-08-2017

$50 shipping!

RE: Indexing tool types, I'm confused! - Vinny - 01-08-2017

Nope. The 12mm was 1.98 and the 10mm was 6.00.

RE: Indexing tool types, I'm confused! - Hopefuldave - 01-10-2017

(01-07-2017, 06:22 PM)EdK Wrote:
(01-07-2017, 06:02 PM)f350ca Wrote: I agree you'll probably use the left hand one the most

I think you mean the right hand which is angled towards the chuck, to the left. It make no sense why they call it a right hand tool when it angles to the left but I'm sure there's a good reason. Ken could educate us but he bailed.

Ed

It goes back to wood turning, right hand tool was dug into the work with the right hand (so moves from right to left), left hand tool dug in from the left (and moves to the right). A lot get this wrong and complain they've been sent the wrong one (and in the UK, the seller of the green machines doesn't even know which is which, he's only been selling the crap for 40 years...)

Dave H. (the other one)