Member postings for Max Medhurst

Ah I hadn't thought of a DTI, I've used them for clocking up work on a mill but never thought of using one on a lathe.

I'll order a DTI and keep a lookout for a good D1-3 chuck.

And KWIL: I've got quite a lot of experience turning at school, in fact we had the exact same lathe (one of the reasons I chose it). I just have never had to go about ordering chucks or jaws as they already had everything we needed. That said I've never turned titanium so it will be an interesting experience.

Thanks for all your help!

The 4" material would be HDPE billets (around 150mm long max.) and the 3" material would be titanium or aluminium billets (max 100mm long)

I have got an independent 4 jaw but didn't know you could grip round material with them, the way I was taught to use them was to centre dot your material and line up with a centre in the tail stock them tighten jaws, not sure how I'd mark the centre of a round peice of material.

Ok, thanks for the link.

If I go for the soft jaws, does anyone know which size ones I need for my chuck?

Ah yes I came across soft jaws but have never used them before, I was led to believe that you had to machine them to fit whatever workpiece you were using so say you would machine them to fit a peice of 3" round bar then they would need re-machining to fit 4" bar, so I would machine them all away pretty quickly.

Can you machine them so they will fit a variety of workpieces? (I don't have a milling machine)

Just checked all the dimensions on this website:

http://www.tools-n-gizmos.com/specs/Lathe_Spindle_Mount.html

And they all agree that it is a D1-3 chuck

It has got a Camlock, 3 pins each 14mm diameter with a centre to centre distance of 61mm, does that sound like d1-3?

There are 3 jaws, each is stamped with the letter W and the number 150 (and also obviously the numbers 1-3)

Each one is: 0.625" wide, 47mm long, slot width is 7.8mm, the depth of the teeth on the back is 4.2mm and the pitch looks to be about 6.5mm.

If you need any more dimensions just let me know!

Hi,

I have just bought a Colchester Bantam 1600 Mk2 lathe and am very pleased with it. The issue is that it only came with a 5" chuck with internal jaws so it can't hold very large material (I need to be able to hold up to 4". The existing chuck is a Pratt Burnerd and has cat no. 1217-24305 (but it is hard to make out so some of the numbers may not be correct) and stamped on the chuck is F8062.

So I'd like to get either some external jaws to fit the existing chuck or a new chuck altogether as that seems virtually as cheap as just the jaws.

What I'm struggling with is finding a chuck that will fit the lathe, I don't want to buy one then find it doesn't fit. I'm also struggling to find any exernal jaws to fit the chuck, I'm not sure exactly which chuck I have as I can't find that cat. No. anywhere.

Any help would be much appreciated