I was wondering how much clamping pressure to apply to risers (3pc) when using Smooth on.
I use 3 4inch clamps, just how tight do I crank them down, is less better ?
Terry
If you can't close the gaps with moderate pressure, then you need to work more on the fit. Too much clamping pressure can cause problems. Torque value?????
Closing the gaps was not a problem I think I just might be tightening too much. How do I gage how tight?
Terry,
I grove both sides of the riser material with a course saw blade. Apply glue to both services and wrap with plastic wrap tightly, then clamp tight. If the riser is all wood I use TTB 3, if it has any glass re-enforcment I use smooth on and cook it. I have never had a problem.
I use clamps a lot. When using several or more to clamp with there is a sequence you should go with and apply tight but not extreme pressure in two or three passes. There will be added pressure to the glue joints with each pass so there is no need to just bare down on each clamp on one pass. Doing that will cause uneaven pressure and bad glue lines. Get everything lined up with the clamps in place and start with clamp one and tighten it with the fingers (holding the tee handles as if you were carrying the clamp at your side with the stem between your ring and middle fingers), then clamp two and then three. Do that sequence two more times and you will have applied enough pressure. If you find yourself using the heel or palms of your hands to get torque then you are messing up with clamps. The key is several moderate passes.