[Rockhounds] 18 inch saw has a problem

[Kreigh Tomaszewski]

The pictures got stripped off, but from your description it sounds like 
the feed is not quite aligned with the blade. As the cut progresses the 
blade is slightly dished from the misalignment and cuts a wider kerf as 
a result.

Put something in the vise that just contacts the blade as the cut 
starts, and advance the feed to see where it is as the cut progresses.

You might do better to put something into the vise that just contacts 
the blade at the end of the feed, and back it up to the start to see 
how far off the alignment is.

A wide kerf can also be caused by having the feed not wuite at right 
angles to the blade, so that the blade appears to wobble. Put something 
into the vise that just touches the blade, and hand turn the blade to 
make sure the contact is the same as the blade turns a full circle. Try 
it at several spots along the feed.

Minor misalignments have negative effect on big blades. If you use a 
pencil as the something in the vise it leaves a nice mark on the blade 
to show misalignment.

Kreigh





On Sunday, Jul 27, 2008, at 20:45 America/Detroit, 
<rockhounds at adelphia.net> wrote:

> MY OLD 18 inch saw stripped the shaft a while back. Had it 
> welded/repaired and now finally got it back together. When I cut a 
> rock now the saw has a gap of about 3/8 of an  inch at the end of the 
> cut  yet is still in contact with the blade at the point the cut 
> started.
> At one point the whole delivery system was taken apart.
> The saw is similar to the old convington type of design with the screw 
> and saw powered by one motor.
> The blade looks to be true.
> Any ideas on the problem?
> I attached 2 photos
>
>
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