My unisaw blade raises (jumps) approximately 1/4" along with the
trunion when I hit the start switch. It does return to original
position once the motor has started. I have had the trunion out and
everything appears to be fine. Has anyone had this problem or have any
New saw, old saw, Is this a new development or has it always done this.
Most cabinet saws do start with a jolt but the blade raising 1/4" is not
normal. Could the arbor bearings have way too much excess play?
Had the trunion out? Then you've taken the internal mechanism
completely apart? Why?
If that is what you did and it is the only way to remove the trunion,
look at the alignment of the elevating worm gear to the gear segment
on the arbor bracket. Is it centered in a linear direction along the
shaft. If not you will get too much backlash and the mechanism will
not be tight. It is originally fixture set and the mounting shaft
should should be scribed prior to removing the arbor bracket assembly
it so that it can be replaced in the same place.
Did you put the shaft pins back that are contacted by the lock knob to
lock the elevating shaft. Easy to miss or forget and if you didn't it
will not lock properly.
When you reassembled did you clamp the yoke/trunion assembly between
the front and rear trunion brackets before you torqued the trunion
bracket bolts down? If not the yoke/trunion assembly will have linear
play between the trunion brackets and the elevating lock will not
I might offer additional help with more infor. Delta tech service
should also be able to help you.
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