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Edgwick Lathe

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timby:

There are some  Pratt Burnerd Jaws listed in  Thame Engineering's catalogue.

https://www.thame-eng.com/products/tec-chuck-jaws/

Regrinding will of course be cheaper and new Jaws won't cure a worn scroll.


Some people salvage old Chucks by  machining the Chuck register bigger then truing the Chuck up to  suit each workpeice.

mattinker:

--- Quote from: HalifaxHerbert on January 15, 2018, 02:54:02 PM ---Hey Guys,

I am another EDGWICK 6.5-inch Lathe Mk. 1 owner .

Mine is fitted with a Pratt Burnerd 1210-02505 Precision 250mm chuck with 0.015" run out.

Any ideas ?

--- End quote ---

Halifax Herbert,

I've just posted a video on regrinding the jaws on my three jaw chuck, it happens to be an Edgewick mk1! I hope it's of some use to you!

Cheers, Matthew

HalifaxHerbert:
Many thanks to VINTAGEANDCLASSICREPAIRS, TIMBY, MATTINKER and all contributors for their valuable input which is much appreciated.

I will investigate the chuck more precisely and try to determine if it is the scroll or the jaws or both which are worn.

If the chuck is beyond repair, has anybody  got some experience with Chinese made chucks or an alternative chuck when compared to the super expensive Pratt Burnerd brand ?
I do not want to go down the second hand route for obvious reasons.

Thank you again for your input.

HalifaxHerbert:
Hi everybody,

I have re measured the run out on my Edgwick Mk1 again.

10mm ground bar : 10mm run out.
25mm ground bar : +/- 2.5mm run out.
Some sideways slop in jaws which was not evident before.

It looks like the chuck scroll is badly worn and the jaw slop may be a problem but I have not stripped it down yet.
Just wondering if it would be better to replace the chuck.

I do not want to go to the expense of a Pratt Burnerd.
Has anybody used and got any feedback on HBM  and TOS chucks ?


Any comments would be much appreciated.

awemawson:
10 mm run out  :bugeye: :bugeye: :bugeye:

You've got the jaws in the wrong slots I reckon  :scratch:

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