As some here may have read previously, I recently aquired an old
Unisaw at a school auction. According to Delta, it's a model 1450
which I think means it's the 1HP bullet motor version of the Unisaw.
It has the old style case with the rounded motor hole (no cover) and
the collar around the base. Year of manufacture is a little more
difficult to come up with as my serial number with a 114 prefix
doesn't match up to the available lists or the info on the OWWM site.
My guess is the manufacture date is somewhere in the mid 50's.
Anyway, today I removed the arbor bracket to take to my local machine
shop to have the bearings replaced (no question that it needs them)
and the run-out checked. It looks to me as though the arbor bracket
has been replaced since it's painted black and all the other guts are
that nice old gray color.
While sticking my head in there, amazed at how much larger everything
is than the parts on the contractors saws I'm used to, I notice a
little bracket hanging loosely from the bottom of the front trunion
bracket. After looking at the parts catalog it could be called the
guide block and may still be used on newer machines. This guide block
bolts to the bottom of the front trunion bracket and the front trunion
runs inside the little finger of the guide block. It looks like it's
supposed to help guide the trunion or berhaps just keep it from moving
too much toward the back of the saw. It has a slotted hole, where
the bolt goes through, so that it can be adjusted more closely toward
the trunion. I do see wear on the guide block but it doesn't seem to
me that it needs to be touching the trunion. My question is, how
should this guide block be installed? Should it be installed
touching the trunion or just a hair away from the trunion? Or maybe I
can just throw it in the box with all the other extra parts that I'm
sure to have left after my "restoration". :-)
Thanks in advance for any help and for answering what is likely to be
the first of many questions regarding this project.
Mike O.
On Sat, 12 Nov 2005 11:12:19 -0600, Frank Boettcher
<[email protected]> wrote:
>Could be it is to offer a little more support on the low side of the
>trunion during the motor torque up or in the event of a kickback.
>Could be a safety bracket.
I hadn't thought about it being some kind of safety feature.
> I really don't know but I would say put it
>on if you have it and see if you even have any clearance. >
This one has room to move maybe 1/16" toward the trunion after it's
hand tightened. This could also be from wear to the guide block.
>On the
>newer models if it isn't touching it is so close you cannot visually
>see a gap.
I assume that it was touching at one time since I see wear on the
guide block. Interestingly enough I can't see any wear on the
trunion so maybe the guide block is made of something softer.
I'll go ahead and tighten it down as close as possible without putting
anything in a bind.
Thanks very much for your help Frank.
Mike O.
On Fri, 11 Nov 2005 18:29:22 -0600, Mike O. <[email protected]> wrote:
I notice a
>little bracket hanging loosely from the bottom of the front trunion
>bracket. After looking at the parts catalog it could be called the
>guide block and may still be used on newer machines. This guide block
>bolts to the bottom of the front trunion bracket and the front trunion
>runs inside the little finger of the guide block. It looks like it's
>supposed to help guide the trunion or berhaps just keep it from moving
>too much toward the back of the saw. It has a slotted hole, where
>the bolt goes through, so that it can be adjusted more closely toward
>the trunion. I do see wear on the guide block but it doesn't seem to
>me that it needs to be touching the trunion. My question is, how
>should this guide block be installed? Should it be installed
>touching the trunion or just a hair away from the trunion? Or maybe I
>can just throw it in the box with all the other extra parts that I'm
>sure to have left after my "restoration". :-)
It is still on current models and as for its purpose will take someone
older than me to comment. On the newer models, even though there is a
large clearance slot in the piece the channel in the block seems to
self fit to the front and rear face edges of the Trunion and the slot
is to adjust for the tolerance stack up betweent the trunion and
trunion bracket.
Could be it is to offer a little more support on the low side of the
trunion during the motor torque up or in the event of a kickback.
Could be a safety bracket. I really don't know but I would say put it
on if you have it and see if you even have any clearance. On the
newer models if it isn't touching it is so close you cannot visually
see a gap.
Frank
>
>Thanks in advance for any help and for answering what is likely to be
>the first of many questions regarding this project.
>
>Mike O.