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Posted by Cheshire Steve on April 23, 2008, 3:25 pm
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On 23 Apr, 13:03, Jim Guthrie wrote:
> On Mon, 21 Apr 2008 16:38:10 -0700 (PDT), Cheshire Steve
>
>
> Steve,
>
> >but as you say
> >the micrometer round the back for raising the knee seems hardly ideal.
>
> I've just re-jigged my workshop so that the left side of the Centec 2A
> is easily reached. That's after living for several years with a
> cupboard adjacent to the left side of the mill and almost requiring
> binoculars to read the knee dial :-)
>
> Risers for the vertical head are probably the next thing for me to get
> or make, since the lack of vertical space under the quill head can be
> a problem, especially when using a Clarkson holder.
>
> Jim.
Hi Jim,
Just trying to think through the handle placement. With the original
design being horizontal milling, I expect that, standing at the left
side, the cutting edge should always rotate away from you and the work
be fed towards you. The two controls you need are both on that side.
I will certainly locate mine for access to two sides, but I expect
that apart from slitting, I will be using the vertical head most of
the time, and the quill feed will do the work.
I wondered about an RSJ for a riser. Milling flats top and bottom and
bolting on dovetails. It could always be stiffened by bracing between
the webs, but I suspect it would be stiff enough. It wouldn't look
very elegant though, but cheap as chips !
Steve
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Posted by jlh45 on April 26, 2008, 7:05 pm
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I've had a 2B for several years and although I look at other mills I
don't think that there are any of the same size that are any better.
I use EP 80/90 oil in the quill and the gearbox, don't use grease in
the quill. Keep an eye on the oil level in the quill if it leaks like
mine does. (Has anyone stripped and replaced the oil seals in a vertical
head as I would like to hear the pitfalls before I do mine.)
I was given the gearbox and quill oil information by a Tim Collis who
at one time had a very nice 2A and was fount of information about
Centecs. I've lost touch with him in recent times so if he reads this
group maybe he will get in touch.
One way of raising the head is to mill a dovetail into the top of the
overarm. That way gives a (small) increase in clearance between the bed
and the quill and allows a quick switch to horizontal milling. The only
reason I haven't done this is I would have to knock a hole through a
wall into the kitchen to get clearance behind the mill and I don't think
that would be appreciated!
John
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jlh45
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Posted by littlekicker on May 23, 2008, 2:16 pm
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jlh45 Wrote:
> (Has anyone stripped and replaced the oil seals in a vertical head as I
> would like to hear the pitfalls before I do mine.)
> John
Hi John, my first post here... I have just stripped the quill assembly
from my vertical head, its fairly straightforward, remove the aluminum
guard from the top of the spindle (3 cap heads) and undo the top nut, i
used an angle grinder spanner to fit the holes whilst holding the
spindle still with a spanner at the bottom. remove the spring and nut.
Then to get the large castalated nut off I used a 5" 4 jaw chuck and
tightened gently it into the grooves, be warned this is a LEFT HAND
THREAD!!!!! now remove the 3 further cap heads on the top housing,
revealed by removal of the previous spindle top guard and remove the
housing complete with bevel gear. Then remove the small hex hed
grubscrew that goes into the slot on the quill just below the quill
clamp. The quill then comes out the bottom of the head. as to undoing
the bearing tention nuts, i had to make up a couple of castalated
"sockets" out of steel tube to undo them. then the spindle knocks out
with a hide mallet. I havent obtained new oil seals yet, but here looks
a good bet... http://simplybearings.co.uk/shop/index.php?cPath=19_21
Angus
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littlekicker
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Posted by jlh45 on May 23, 2008, 7:27 pm
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Hi Angus
Thanks for the info - just what I needed and the link to the web site
looks really useful.
John
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jlh45
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Posted by David Littlewood on April 21, 2008, 8:33 pm
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>Just collected a Centec 2A with the good vertical head and I am
>strongly inclined to plug it in, but it has been in store for ages (I
>am still trying to remove some of the gloop using petrol - must have
>had Shellac in it). Obviously I will go over it for electrical safety
>(single phase), but I wonder if anyone has commissioning advice ?
>
Not sure how soluble shellac is in hydrocarbon solvents (petrol,
paraffin etc.). The usual solvent in french polish is ethanol. If you
are still having trouble getting it cleaned off, try methylated spirit,
or (better, but dearer) surgical spirit. That's always assuming it was
in fact shellac, of course.
David
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David Littlewood
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>
>
> Steve,
>