6 jaw chuck

just seen post on a site reviewing a 6 jaw chuck.

all bad because nothing like pic in catalogue etc.

never heard of them before, curious as to what they would be used for.

precision grinding

Also nice for holding thin wall tube

I Noticed them on the Pratt Burnerd website when looking for other things, never used one though!

**LINK**

In a nutshell light duty, high precision work holding. A bit like an adjustable collet really.

Also handy for gripping the sides of your wallet after buying one because, believe me , it will be thin.

And apparently if you take out two opposite jaws you can use it like a less powerful 4-jaw...can save changing heavy chucks for a quicky type job.

I'd have thought that you take out every second jaw, then you have a three jaw chuck.

Ian S C

I have a Pratt one just over 4" dia which I cadged when we were having a full refurb of our Brierly ZB32 Drill grinder.

As Adam says its grinding where they come into their own, in particular grip spreading on spiral fluted cutters.

Mine goes down to gripping a tad under 2mm in diameter and is really true considerering it's past life. Not really worth the cost for normal jobbing type operations at their new prices. Reckon mose people was just opt for good collet setup.

Youtube channel for oxtoolco did the two jaw removal in one of his (many) vids. take the 'top' and 'bottom' ones out and you have an elongated 'X' of jaws for a self centering light-hold 4-jaw

pgk

£128 (inc. postage) for an almost new 6" Buck Tru-Grip chuck from our favourite auction site seemed like good value to me.

Dave
The Emerald Isle

Can't seem to find that one Dave.

Looked under sold listings as that's the only way to know what they went for and all the cheaper sub £300 ones only had one set of jaws.

Chances of getting a set of 6 matching jaws for the other set are slim.

You won't find it John because it was about 2 years ago.

It was badly advertised and there were no other bids Said it was for a Hardinge lathe so all I had to do was change the backplate for my lathe.

Dave
The Emerald Isle

I have been after a few the last 12 years but don't like the price. 4 1/2+?", 5 1/2" and 8"

A few years ago they seemed to jump £250 over night for smallest tolerable 125mm now in excess of £521 for a Polish plus backing plate £45, didn't like the price before but would be used daily for heavy work.

Got outbid on a Pratt 6 1/2" 6 jaw a few years back, went for £300+ D1-4

Theres a Colchester one on there now L0 fit, Harrison are L00 fit!

.

Right OK got it.

Bit like that new Mini van I bought in 1968 for £440 then ?

I bought my mini for £10 in 1968 - you wuz robbed MInd you it did have a have a lot of putty and tin lids covering the holes in the floor pan...

That was brand new Steve but the cheapest I could get. Because it was classed as a commercial vehicle you could get £20 knocked off for buying it in primer and in those days it only cost £3 for enough paint to do a Mini.

Plus at that time road tax was £25 but if you taxed it goods it fell into the lower class and only cost £24

John,

Is that £1 you saved the one that you lent to Ketan?