Small Pratt burnered chucks. Jaws?

[Andrew TinsleyParticipant @andrewtinsley63637]

[Andrew TinsleyParticipant @andrewtinsley63637]

I have what appear to be two small Pratt Burnered Grip tru chucks. The diameter is 3.25 inches or about 83mm. The name plate is missing, but they look to be a smaller version of my 4 inch Grip tru chuck in every respect.

Now I salvaged these off an experimental glass lathe which had hardly been used. The only snag is that one is fitted with inside jaws and the other, outside jaws! At least I have one set for both chucks!

Is it possible to buy another set? Or is Pratt Burnered no longer interested in supplying spares for these chucks? Anything else that would fit? or does anyone have any to sell?

I would like to get another set of jaws, then I can pass one of the chucks to a friend who could make good use of it.

Andrew.

P.S. The Pratt Burnered website is totally unhelpful when it comes to spares, at least I can't find a useful page!

[John CParticipant @johnc47954]

Rotagrip (www.rotagriponline.com) are very helpful for PB stuff.

[MalcBParticipant @malcb52554]

Thame Engineering may be worth a call as well.

[Tony Pratt 1Participant @tonypratt1]

If you can work out the right part # from the Thame Engineering site Cromwell tools are quite reasonable [if they stock what you want]

Tony

[Andrew TinsleyParticipant @andrewtinsley63637]

Thanks gentlemen,

I will give those leads a try.

Andrew.

[Martin KyteParticipant @martinkyte99762]

Replacement jaws for ancient PB chucks are hugely expensive.

However soft Jaws for same are not.

I bought a new Super Precision for the price I could get replacement jaws.I subsequently pensioned off my old Griptrue and bought it a set of soft jaws for it on the basis that the body and the scroll were worn but that would not signify for soft jaws when machined correctly for a single setting. I saved junking the chuck and the soft jaws were about £20 from Rotagrip.

However ring them up and ask.

regards Martin

[Clive Brown 1Participant @clivebrown1]

There's a set of inside jaws for PB 3.25" 3-jaw currently on eBay for ~£45. Described as new old stock.

Don't know if they are the type OP needs.

No connection!

Clive

[Mike PooleParticipant @mikepoole82104]

I should take a seat before you check the price.

Mike

[Andrew TinsleyParticipant @andrewtinsley63637]

Thanks Clive!

just got the NOS 3.25" inside jaws for £45, Considering what a new 3.25"Griptru would cost if the made them today, they are a bargain!

Andrew.

[Andrew TinsleyParticipant @andrewtinsley63637]

So all I need are a pair of outside jaws to complete the job. I have found them on the Thame website and they are expensive! I shall keep a lookout over the next few months and see if I can get them on the bay, or similar.

Having got the inside jaws cheaply, at least I can pass on the second chuck to a needy fellow engineer. So job almost done. Well worthwhile, as the chucks are in near new condition. People say the jaws are expensive, but I wonder what a new chuck would cost if they were made today? I bet you would not get much change out of £500!

Andrew.

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