[modeleng] Re: Cleaning Chucks
- From: "Wilfried Vermeiren" <vermeiren.wilfried@xxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Wed, 17 Aug 2005 08:13:43 +0200
Hi,
Well a 3 jaw self centering chuck manufactured by Pratt Burnerd is certainly
worth an attempt a saving. They are expensive enough. Over the years the
inside do collect quite a lot of debris and it certainly pays to clean it on
regularly times. The swarf collected inside ads a lot to the wear and tear
of the parts. Especially the dust of cast iron gets in deep.
When I reassemble mine I don't use grease just a bit of sparingly applied
oil. Barely enough to give the part an "oily" look. None at all on the gear
faces and scroll.
By the way never blow out a chuck with high pressure. Most of the time only
surface dirt disappears but the real buggers go further inside. If you use
air: LOW pressure.
As to the reverse set. With a second hand set you are in for trouble. Chucks
come with their own sets of yaws. If ordering spare parts there is a number
somewhere on the chuck. So a second hand bumpt and battered around in some
box at a show and from unknown origin will be pretty useless.
As for a "new" set. The price will be next to equal a complete new chuck
from far eastern origins. Also consider you are going to use the brand new
teeth of the jaws on the "worn" teeth of the scroll. Don't expect to much
you could get deeply disappointed. There is a rule in servicing machines:
ALWAYS change both gears of a pair. NEVER one.
Rotagrip has been mentioned as a source but there are others also supplying
them. Last time I looked at the Myford stand they all seemed to come from
exotic country's.
A tip look round for the one with the least overhang. Quite a few from over
there have big bodies and fitted to a back plate tend to end up halfway your
lathe bed. Also some "save" on holes for the key. I got one as present and
it has only one keyhole. It always stops with the hole at the opposite side,
some obscure law of physics?
Regards
Wilfried Vermeiren
http://users.skynet.be/modelbouw.wilfried
updated.
-----Oorspronkelijk bericht-----
Van: modeleng-bounce@xxxxxxxxxxxxx [mailto:modeleng-bounce@xxxxxxxxxxxxx]
Namens John Buckley
Verzonden: dinsdag 16 augustus 2005 20:42
Aan: modeleng@xxxxxxxxxxxxx
Onderwerp: [modeleng] Re: Cleaning Chucks
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