Pratt chuck spares

[yorkie_chris]

Ey up folks,

The 6" 4 jaw that came with my lathe is a bit poorly

The square drive holes in the end of the screw threads have split from the corners out, meaning the screws drag and you can't adjust it precisely.

The markings on it say "the Pratt chuck" "made in England" and what looks like "AE 666".

Does anyone know if you can get these?

Cheers

[SemiSkilled]

try 

http://www.600uk.com/products/principal.asp?id=18


Lee

[andyf]

By coincidence, there is an article in the current issue of MEW (April 2011, no. 175) by a chap who had the same problem with a 4" Pratt-Bernerd. He made new screws from 1/2 x 1.25" Whit hex socket grubscrews, and a hex chuck key to operate them. He doesn't say where he sourced the grubscrews. Of course, your larger chuck may use a larger size of screw.

Andy

[Jasonb]

Rotagrip also do chucks and spares, just bought some soft jaws for my Warco chuck from them, very quick service

http://rotagriponline.com/index.php?option=com_virtuemart&page=shop.browse&category_id=33&Itemid=29

J

[mike os]

600 group will probably want more than a new chuck & lathe per screw if past experience is anything to go on......

[yorkie_chris]

I rang them today, the guy said he'd have a look and get back to me "in a couple of hours", that was dinnertime...

[yorkie_chris]

By coincidence, there is an article in the current issue of MEW (April 2011, no. 175) by a chap who had the same problem with a 4" Pratt-Bernerd. He made new screws from 1/2 x 1.25" Whit hex socket grubscrews, and a hex chuck key to operate them. He doesn't say where he sourced the grubscrews. Of course, your larger chuck may use a larger size of screw.

Andy

Can you get them in square section thread? Without it costing 4 squillion pounds...

[andyf]

By coincidence, there is an article in the current issue of MEW (April 2011, no. 175) by a chap who had the same problem with a 4" Pratt-Bernerd. He made new screws from 1/2 x 1.25" Whit hex socket grubscrews, and a hex chuck key to operate them. He doesn't say where he sourced the grubscrews. Of course, your larger chuck may use a larger size of screw.

Andy

Can you get them in square section thread? Without it costing 4 squillion pounds...

Doubt it, Chris, though I hope for your sake that someoene proves me wrong.

It seems the author of the article was lucky in that he only needed Whit threads.

Andy

[yorkie_chris]

The screws are actually still made... found part numbers etc.

Over £40 each!