Idler sizing

Question

Idler sizing

dirkx opened this issue 5 years ago · 4 comments

The BOM should probably stress that the idlers need to be fairly small; with an OD of the rims of 13 or even less. (as standard idlers for 2GT tend to be around 22-24mm).

Answer 1 · 2019-08-14T22:18:20.000Z

I typically use toothless idlers. Several of the idlers touch the back of the belt.

They are usually matched to the equivalent tooth size. The ones I use are 16 tooth equivalent diameter.

I'll try to find a way to link to link the BOM item to a page with more detailed dimensions.

Answer 2 · 2019-08-14T22:52:54.000Z

Here are the dimensions for the smooth idler.

Answer 3 · 2019-08-15T10:46:10.000Z

On 15 Aug 2019, at 00:18, bdring ***@***.***> wrote: I typically use toothless idlers.

Drawing was a bit confusing. The main point is that most default idlers and pulls with tooth have a larger rim OD than the ones that currently easily fit. And this is rarely part of the spec-sheet. So it would be good to update the BOM to stress the much smaller than `default' size of the outer rims. And ultimately adjust the design a bit perhaps to allow the more common 22-25mm outer diameter idles (the inner diameter is only 2-3mm larger than yours). Dw

Answer 4 · 2019-08-15T14:20:42.000Z

I added more info to BOM and a link to this issue. Changing the pulleys would affect many parts, increase the size and reduce the work area. I don't want to do that.