Replies

1. 
   Telemike | Aug 11, 2004 07:54am | #1

   I have a B600A, a very early version of the Hitachi resaw. Last month cutting some english walnut (from the hedgerow) into boards, the motor suddenly did a fourth of july imitation. One brush had failed when the connecting wire melted out of the carbon brush. I got new brushes at the local Hitachi repair place - I think that the motor on the newer saws is the same as the older saws. The new one is a CB ???, you can find it on the Hitachi website. I'd look, but I have a SLOW connection and can't get DSL or cable.

   The motor would be a little hard to replace given that it is a universal motor with an integral gear box. If I had to replace it, I'd use a 2 HP induction motor and use pulley sizes to gear it down. You want the blade to go at about 800 feet per minute (right guys?). You can calculate from there. You might have to have a machine shop alter a pulley ID to fit and you'd have to adapt the motor mounting.

2. 
   TKanzler | Aug 11, 2004 04:04pm | #2

   Universal motor, huh?  That explains why Naam's resaw sounds like it's bogging when he runs it hard.  Wouldn't have been my first choice for a motor for that application.

   I agree that a long term solution would be to use an induction motor (I'd go no smaller than 3 hp) and change the sheaves as needed to get the recommended blade speed.  But at about 12.5:1 ratio, it would be more practical to use an intermediate shaft (single belt drive primary, dual belt drive final).  You could keep the existing arbor sheave that way (and possibly reuse the existing motor sheave on the intermediate shaft), and only have to buy less expensive single-groove sheaves for the primary portion.

   Be seeing you...