Guys,
Need some help!
I went to cut an M12 thread today - first time... But despite having a rough idea of what I was supposed to be doing the pitch just didn't seem right and Im not sure it was picking up the thread in the right place on subsequent cuts every time...
Textbook of turning says that the thread chase indicator should be set on the smallest sprocket and chase a 1.75mm pitch on number 5's.
Gearbox is set to 5B (1.75mm pitch as per the plate on the gearbox), but what is confusing me is that the same plate also says that the stud gear should be 45. The picture identifying the stud gear in the textbook of turning is the little gear that is on the tumbler gears but this doesn't come off. I have a 45 tooth gear that is currently acting as a space on the end of the gearbox shaft, its a 50 tooth thats being driven by the 80 tooth idler gear.
Should the 50 be replaced by the 45 (i.e. make the 50 the spacer and drive the 45 with the 80 tooth idler?).
Any pointers?
Thx
J
Need some help!
I went to cut an M12 thread today - first time... But despite having a rough idea of what I was supposed to be doing the pitch just didn't seem right and Im not sure it was picking up the thread in the right place on subsequent cuts every time...
Textbook of turning says that the thread chase indicator should be set on the smallest sprocket and chase a 1.75mm pitch on number 5's.
Gearbox is set to 5B (1.75mm pitch as per the plate on the gearbox), but what is confusing me is that the same plate also says that the stud gear should be 45. The picture identifying the stud gear in the textbook of turning is the little gear that is on the tumbler gears but this doesn't come off. I have a 45 tooth gear that is currently acting as a space on the end of the gearbox shaft, its a 50 tooth thats being driven by the 80 tooth idler gear.
Should the 50 be replaced by the 45 (i.e. make the 50 the spacer and drive the 45 with the 80 tooth idler?).
Any pointers?
Thx
J
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