Rotating Ballnut - design ideas

[Black Forest]

But all puley more than 13t including are ok. Now it should be considered that the bending radius of 13t puley is too small, this for the durability of the belts. And believe me it will generate heat on the belt and pulley. But as belts is 3-4 $ its not of a great concern.


Boyan

Remember that changing out a belt is no small project with the rotating nut design. So durability of a belt should be a big concern because of the downtime and hassle of disassembling everything in order to change out the belt. The whole ballscrew must be uninstalled to change a belt. No small task regardless of the size of the table.

[Boyan Silyavski]

Remember that changing out a belt is no small project with the rotating nut design. So durability of a belt should be a big concern because of the downtime and hassle of disassembling everything in order to change out the belt. The whole ballscrew must be uninstalled to change a belt. No small task regardless of the size of the table.

Exactly, that's why i said 16t as minimum. Everyday 8h machining belts would withstand at least say 2 years. Using it as a hobby machine at least 6-8 years.

[mutzy]

Thanks for all of the awesome input. i was preoccupied with other things, but now I can get backt to the design.

Mutzy

[mutzy]

Boyan, how are you? sorry it has been a long time. I got the 22 teeth HTD drawn onto the shaft. The shaft is only .05 in thickness. is this too small?

[Boyan Silyavski]

Boyan, how are you? sorry it has been a long time. I got the 22 teeth HTD drawn onto the shaft. The shaft is only .05 in thickness. is this too small?

I think its too thin. The clearance from screw has to be no more than 1mm, in fact mine is 1mm. so inside bore will be 25+2=27mm.