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LMS 5 inch 4 jaw independent chuck - 1st look
开云体育Well
today I found a little time to take a look at the LMS 5 inch 4 jaw independent
chuck that I now have. Here are few comments on it. The dimensions are rough
measurements taken with a machinist ruler.
?
It
came with a light covering of the red grease that I just wiped off with paper
towels a Q-tips. The adapter plate was already installed so I took that off to
clean up the red grease which was between the plate and
chuck.
?
The
adapter plate adds about .656 or 21/32nds to the total thickness for those
considering putting a larger chuck on?their lathe. This of
course?reduces the distance between the chuck and the tail
stock.
?
It
weighs in at around 14 pounds including the adapter plate. I don't have it
installed on the lathe yet so I don't know how this compares to the standard 3
inch 3 jaw chuck. When I get the 3 inch chuck off ?I'll try to remember to
weight it.
?
The
quality appears to be pretty good. This was expected to be of good quality
coming from LMS and it is.
?
I was
hoping that the 5 inch chuck would use the same size chuck key as the 3 inch
chuck that came standard on my Micromark 7x16, but the key's square drive on the
5 inch is actually a bit smaller that the 3 inch, so I cannot use the same chuck
key since the 3 inch chuck's key will not fit the 5 inch.
:-(
?
The
adapter plate has a thru bore of about one inch which is larger than the lathe's
spindle thru bore, but the 5 inch chuck has an even larger thru bore. I suppose
one could bore the adapter plate a bit to make it match the chuck which would
allow you to insert a thick piece of material about?3 1/2 inches into the
chuck before it bottomed out on the spindle. This is the measurement from the
jaw face to the back of the adapter plate recess.
?
It's a
bit chilly out in the garage right now so I'm not going to install it on the
lathe until we get a bit of a warm spell. If it is below 60 degrees I'm
freezing! HA!
Michael - USA Micro-Mark MicroLux
7x16 ?
?
? |
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Jerry Durand
开云体育If your adapter plate has spare holes in it, you might want to add weight to balance it.? On mine I mildly heated the plate on a lab hot plate, put cut up wheel weights into the spare holes and filled them with hot-melt glue.Turned off the hot plate and let it cool.? As expected the glue sticks well to the metal since it was hot to start with and the holes weren't polished. On 12/28/2012 05:49 PM, Michael
Jablonski wrote:
-- Jerry Durand, Durand Interstellar, Inc. tel: +1 408 356-3886, USA toll free: 1 866 356-3886 Skype: jerrydurand |
开云体育Yes
the adapter plate has the extra holes. I am going to wait and see if they create
a vibration on my machine before filling them. I'm hoping that with the added
mass of the 5 inch chuck they won't matter much. Maybe I'm dreaming.
Michael - USA Micro-Mark MicroLux
7x16
|
开云体育Well I
finally got around to mounting the LMS 5 inch 4 jaw independent chuck on the
Micromark 7x16.
?
Here
are a couple of pictures:
<
>
< > My
first thoughts now that I have it are that maybe the 5 inch is a bit much for a
7x lathe. While the Micromark motor has no problem spinning it up, the added
mass of the 5 inch takes a while to spin down?to a stop.
?
The 5
inch weighs in around 14 pounds with the required?adapter
plate.
The
standard 3 inch weighs in at 3.25 pounds.
?
IT IS
POSSIBLE to extend the jaws out far enough so that they will hit the bed. A
little care will need to be taken so this does not happen. I opened it up so it
could hold a piece around 2.75 inch in diameter and the jaws had a comfortable
clearance over the bed. This was with the jaws in the position as in the photos,
I haven't turned the jaws around yet to take any measurements in that
configuration.
?
I'm
wondering now if maybe a 4 inch chuck would have been better.
Michael - USA Micro-Mark MicroLux
7x16 ?
? |
开云体育Michael,
I have a Grizzly 8688 (7x12). My first chuck
upgrade was an LMS 5"- 4 jaw, holy smokers! I switched to a 4"- 3 jaw, seldom
ever comes off the lathe. Foe me the 4' has worked out lots better. Kept the 5"
though, just in case....hmmmmm.
allen
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John
Hello Michael.
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Let us know if when turning large diameters, you notice a difference in the increased torque.You will have picked up more kinetic energy which should be in your favor as regards the machine wanting to slow or bog down. Do you have tapered spindle bearings. The standard deep groove bearings could be marginal with the extra weight. Have you modified (extended) the cross slide to give you extra travel. Regards John L Spain. --- In 7x12minilathe@..., "Michael Jablonski" wrote:
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开云体育Hello
John,
?
I
haven't changed out the spindle bearings to tapered ones. I normally don't
change something out until it becomes necessary. Same with extending the cross
slide, but I can see where the cross slide modification will probably be
necessary sooner than later.
?
I
don't have a mill (yet)?so the reason for the?5 inch 4 jaw was to hold
a rectangular piece and bore a partial recess to accommodate a bearing. I wasn't
sure if a 4 inch chuck?would have been large enough. The 5 inch did the job
but because of the location of the recess on the piece?which was off to one
side,?the spindle speed had to be set fairly slow because of the imbalance
caused by?the piece not being centered?in the chuck. This created
quite a vibration, and my lathe is not bolted down. So I just took small slow
cuts and got the job done.?
?
In
hindsight, I should have probably just put the $119 that I spent on the chuck
and put it towards the purchase of?a new mini mill. Oh well, Christmas is
gone but Valentine's Day is coming up so maybe I'll buy a mini mill for my
girlfriend, and if she doesn't want to use it I guess I'd just have to use it!
;-)
Michael - USA Micro-Mark MicroLux
7x16 -----Original Message-----
From: 7x12minilathe@... [mailto:7x12minilathe@...] On Behalf Of John Sent: Thursday, January 17, 2013 9:06 PM To: 7x12minilathe@... Subject: [7x12minilathe] Re: LMS 5 inch 4 jaw independent chuck - 1st look ? |
开云体育I too
was a bit surprised at the weight and size of the 5 inch chuck. It just looks
bigger and heavier in person than on the spec sheet.
Michael - USA Micro-Mark MicroLux
7x16
|
|
Don't overlook using a faceplate for big, blorky items. They can be tedious to set up, but, can accommodate truly weird shapes. They can usually also hold counter balancing weights to smooth things out when turning eccentric pieces.
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Roy --- In 7x12minilathe@..., "Michael Jablonski" wrote:
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开云体育Hi
Roy,
?
I
order a faceplate when I ordered the machine because I thought that I'd need it
in case the 3 inch chuck couldn't hold another work piece I needed to work
on.?That was the whole reason why I purchased the machine to begin with.
Turned out that the 3 inch chuck could, so I never used the faceplate.
?
I
thought the four jaw chuck would be the way to go, and since I didn't have one
figured it was a good excuse to buy one. But today I did some turning of round
stock in it. I was too lazy to swap it out for the 3 inch 3 jaw so I just used
the 4 jaw. Turns out the 4 jaw has a bit of a vibration to it even when turning
centered round stock. It's probably caused by the extra holes in the adapter
plate. I guess I'll have to fill them in to see if that helps with the
unbalanced vibration.
Michael - USA Micro-Mark MicroLux
7x16
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|
Now I don't have the?Cadillac?you have but the five took out the?control?box on mine slick as a whistle be careful very very light cuts with the five you have a lot more mass to spin. Warren From: Michael Jablonski To: 7x12minilathe@... Sent: Thursday, January 17, 2013 4:22 PM Subject: RE: [7x12minilathe] LMS 5 inch 4 jaw independent chuck - 1st look
?
Well I
finally got around to mounting the LMS 5 inch 4 jaw independent chuck on the
Micromark 7x16.
?
Here
are a couple of pictures:
<
>
< > My
first thoughts now that I have it are that maybe the 5 inch is a bit much for a
7x lathe. While the Micromark motor has no problem spinning it up, the added
mass of the 5 inch takes a while to spin down?to a stop.
?
The 5
inch weighs in around 14 pounds with the required?adapter
plate.
The
standard 3 inch weighs in at 3.25 pounds.
?
IT IS
POSSIBLE to extend the jaws out far enough so that they will hit the bed. A
little care will need to be taken so this does not happen. I opened it up so it
could hold a piece around 2.75 inch in diameter and the jaws had a comfortable
clearance over the bed. This was with the jaws in the position as in the photos,
I haven't turned the jaws around yet to take any measurements in that
configuration.
?
I'm
wondering now if maybe a 4 inch chuck would have been better.
Michael - USA Micro-Mark MicroLux
7x16 ?
?
|