Parallel Depth Bevel Gears

[Steve CrowParticipant @stevecrow46066]

I know this has been done to death on this forum. I've read every post on the subject.

My problem is, I'm not the best at maths and I think in metric. All the diagrams and formulae I've seen are for DP and Imperial.

I thought I'd have a go at "translating" the infamous Fig. 80 in the Ivan Law book, taking into account errors pointed out on on this forum, using gear Module and metric.

 

I'm not convinced everything is correct here. I also have doubts about points 4 and 5.

Point 4. Surely the large end Mod calc should use large end pitch dia. not O/D?

Point 5. Shouldn't the tooth cutter depend on the large end pitch dia divided by teeth number? Other calculations I've seen use this.

I am hoping that somebody out there with greater knowledge can have a look and confirm things or put me right.

Cheers

Steve

Edited By Steve Crow on 21/07/2020 17:00:28

[Steve CrowParticipant @stevecrow46066]

[Martin ConnellyParticipant @martinconnelly55370]

HPC gears have a lot of useful data for this sort of thing on their web site.

Martin C

[Steve CrowParticipant @stevecrow46066]

HPC gears have a lot of useful data for this sort of thing on their web site.

Martin C

Thanks Martin, I've waded through their stuff as well. Couldn't see anything on parallel depth bevels though.

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