|Home » Forums » Architectural Woodworking » Message||Login|
You are not logged in. Consider these WOODWEB Member advantages:
Heating a Cast Iron Saw Table6/5
Has anyone ever used heat to straighten a bowed cast iron table saw top ? I was told it works. Mine is actually the sliding section on an old but extremely precise Tannewitz 16" saw. It measures 20" X 45" X 3/4" and it has a 1/16" bow that is high in the middle. I can live with it but you know how that goes....
I had a sliding table on a shaper that was bowed right from the factory. The service tech heated and straightened the top so it was dead straight.
I was very doubtful it was going to work and fully expected him to break the cast but it worked and as long as I had the shaper it stayed straight.
It was a long time ago and my memory of the exact procedure is a little foggy but as I recall he situated the top so he could apply force on one end while the other was captured then applied heat and steady force and checked for straight the redid the procedure until it worked.
Just to be clear it was a new machine and I was not willing to accept a sort of straight top. It was dead straight when he was done and I bought him a beer ;)
Long ago I bought anew Powermatic 6" jointer. It came with a fence that was way out of straight. I talked to a factory tech. This is how he told me to straighten it. Put two 4x4's on the floor near the ends of the fence. Place fence bow up on 4x4s. Stand in middle of fence and bounce, a bit harder each time until you feel it give.
Try the Old Woodworking Machines Forum. There are people there that have probably done this. At least there are people there that understand and value an old Tannewitz saw, and can offer some solutions that will last for another 50 years.