Craftsman Back Lathe.

[Round in circles]

my back lathe is similar to the craftsman lathe with back gear s but it has Bakelite pulleys
Since I've had my recent spinal operation my hearing has returned a tremendous amount . I was turning some of the copper ferrules for my micro spray irrigation systems when I became aware of a gently rhythmic slapping sort of noise , that waxed & waned as I faced the ends of the thin wall copper tube , counter sunk the rough edged bore hole and filed off the outer edge burring .
I used a big diameter bamboo cane about 2 feet long as a listening stick .. it amplifies noise like a stethoscope if one end is pressed against the inner ear tab .

It didn't take long for me to identify that the noise was being produced some where along the drive pulley cross shaft . On stopping he lathe I found what i already knew was there the slight back & forth slap between the pulley drive boss and the drive spur set on the cross shaft .
Every time the lathe was under cutting tension it took up any slack with the gentle slap and once it was taken off the gap reappeared.


I'd like to eliminate this 2.5 mm slap gap as much as is reasonably possible . I've considered using some injectable silicone gasket rubber to squeeze into the gaps , done when the chuck is under the pressure of an clockwise rotation so it holds close to the working faces .

However I do not know if it will do much good before the set silicone breaks up ( if at all ) or if it will actually work at all .

Have any of you guys solves such slap noise problems on the drive pulleys if so hopw did you do it.


I'm also open to other workable suggestions.

thanks
Dave

 

[Round in circles]

PS
All above spellings mistook are added for free ..I'm more dyslexic than normal when I hurt .

 

[Round in circles]

Whoopeeeee!
Problem solved ,the lathe is now very quiet when running & turning things , no more slapping noises.
I undid the main large pulley retainer grub screw on the left hand end of the cross shaft , slid the pulley to the left to expose the driving dogs . Then cleaned them off with meths , once dried i squeezed a small amount of plastic gasket compound on the back & front faces of both the dogs then slid it back together fairly tightly to cause the compound to ooze out the former gaps and reset the retaining collar so there is no free sideways play . I left it over night and for much of the next day before I started the lathe again . Absolutely fantastic it's so quiet .

Next on the agenda is to do the inner drive dog set that transmits drive from the cross shaft pulley's to the head stock shaft pulley's but first I have to turn up some new " cotton reel " cross shaft double bearing holders for I'm moving over from worn phosphor bronze daily oiled bearings to four high speed precision long life sealed roller bearings .
These next few days could be very very interesting .