grim_d
Unlikeable idiot.
- Messages
- 4,220
- Location
- Scotland - Ayrshire
After the absolutely roaring success of repairing the table tilt casting on my walker turner bandsaw I felt confident giving the cracks around the lugs on the upper cover for the belt tension mechanism a go.
It did not go quite so well...it now has lots of extra cracks.
It's a pretty thin casting, 5mm maybe, I simply could not get enough heat to melt and wet out the silicon bronze without melting some of the patent material, way too much localised heat and ultimately...ping!
1.6mm silicon bronze rods, 2.4mm tungsten, around 65 amps, would a 1.6 have been better?
It's too big to preheat the whole thing...is preheat as important when brazing?
I thought 1.0mm rods would be good but they don't appear to be readily available?
Any advice? I'd rather braze it than get the fibreglass out...
It did not go quite so well...it now has lots of extra cracks.
It's a pretty thin casting, 5mm maybe, I simply could not get enough heat to melt and wet out the silicon bronze without melting some of the patent material, way too much localised heat and ultimately...ping!
1.6mm silicon bronze rods, 2.4mm tungsten, around 65 amps, would a 1.6 have been better?
It's too big to preheat the whole thing...is preheat as important when brazing?
I thought 1.0mm rods would be good but they don't appear to be readily available?
Any advice? I'd rather braze it than get the fibreglass out...