Pullys and their design

[GeorgeD]

Hi Smiler

I think they're made as one unit? as I've seen em in Aluminium,hence me asking how they're made.

I know how the spur geas are cut,but for the life of me just can't see how these are made.

[Smiler]

Hi Smiler

I think they're made as one unit? as I've seen em in Aluminium,hence me asking how they're made.

I know how the spur geas are cut,but for the life of me just can't see how these are made.

The one you showed is almost identical to the one I bought from BB last week, it is definately a three piece unit, main pulley body and two sidewalls which are pressed on and I think peened in place.
As ross says, it would be difficult (not impossible, as you could cast it as one piece) to make any other way unless you had either the ends of your belt teeth rounded or overcut the tooth at both ends.


Jeff.