[Me...] Posted June 3, 2020 Share Posted June 3, 2020 In regard to the "in between" Profile callout as shown in the capture below, how do we determine which direction the engineer is talking about? Is it based on the basic dimensions given, or is there an unwritten/written rule in the standard of the direction? Link to comment https://qualityforum.zeiss.com/topic/15614-another-dayanother-gdampt-question-%C2%AF_%E3%83%84_%C2%AF/ Share on other sites More sharing options...
[Cl...] Posted June 3, 2020 Share Posted June 3, 2020 The answer might lye in which direction the leader lines are pointing? Link to comment https://qualityforum.zeiss.com/topic/15614-another-dayanother-gdampt-question-%C2%AF_%E3%83%84_%C2%AF/#findComment-84828 Share on other sites More sharing options...
[Ri...] Posted June 3, 2020 Share Posted June 3, 2020 The way that I've always interpreted them is the shortest distance between the two. I've seen a lot of custom designed inverted tooth sprockets that use Profiles to define the teeth geometry, and this is how I've always measured it. Think of it this way, it is in-between those start and stop locations, if you went the other way you wouldn't be measuring in-between. It doesn't matter if you go a clockwise to b or be counter-clockwise to a; as long as you stay in between those two start/stop locations. Link to comment https://qualityforum.zeiss.com/topic/15614-another-dayanother-gdampt-question-%C2%AF_%E3%83%84_%C2%AF/#findComment-84830 Share on other sites More sharing options...
[Ri...] Posted June 3, 2020 Share Posted June 3, 2020 Also, since this is a spline, it looks like someone got extremely lazy and didn't want to fully define the spline tolerances. Now you have this Profile tolerance that is controlling not only Orientation, Location, Roundness, but the nominal Involute, Helix, Pitch, Major Diameter, and Minor Diameter. Lazy drawing... Lazy. Now when it is out of specification, you get to do the extra homework of showing them what exactly is out. Link to comment https://qualityforum.zeiss.com/topic/15614-another-dayanother-gdampt-question-%C2%AF_%E3%83%84_%C2%AF/#findComment-84832 Share on other sites More sharing options...
[Me...] Posted June 3, 2020 Author Share Posted June 3, 2020 I know this particular drawing isn't a great example because it is very clear based on the basics and where the Profile leader line points to but I've seen some awful drawings with the in between and just wondered what the correct direction may be. Link to comment https://qualityforum.zeiss.com/topic/15614-another-dayanother-gdampt-question-%C2%AF_%E3%83%84_%C2%AF/#findComment-84834 Share on other sites More sharing options...
[Ia...] Posted June 3, 2020 Share Posted June 3, 2020 That seems like a lot of tolerance for teeth. If those surfaces/teeth aren't defined anywhere else on the drawing, then I am ¯\_(ツ)_/¯ Link to comment https://qualityforum.zeiss.com/topic/15614-another-dayanother-gdampt-question-%C2%AF_%E3%83%84_%C2%AF/#findComment-84836 Share on other sites More sharing options...
[Me...] Posted June 3, 2020 Author Share Posted June 3, 2020 It's not to the teeth, all the of the basics are called out for the outside and the teeth have a data set in a table with a different profile tolerance. Link to comment https://qualityforum.zeiss.com/topic/15614-another-dayanother-gdampt-question-%C2%AF_%E3%83%84_%C2%AF/#findComment-84838 Share on other sites More sharing options...
[Me...] Posted June 3, 2020 Author Share Posted June 3, 2020 The leader line is on the side of the part, not the spline. That's the direction. Link to comment https://qualityforum.zeiss.com/topic/15614-another-dayanother-gdampt-question-%C2%AF_%E3%83%84_%C2%AF/#findComment-84840 Share on other sites More sharing options...
[Ch...] Posted June 3, 2020 Share Posted June 3, 2020 Howdy gents, We make this same part, or at least we farm it out. I made a program for this not long ago. I interpreted it as A to B around the back avoiding the gear teeth. ( I also had to inspect pitch lead and profile on all teeth with a 0.5mm ) Good luck! Link to comment https://qualityforum.zeiss.com/topic/15614-another-dayanother-gdampt-question-%C2%AF_%E3%83%84_%C2%AF/#findComment-84842 Share on other sites More sharing options...
[Me...] Posted June 3, 2020 Author Share Posted June 3, 2020 Please sign in to view this quote. Yeah I've had a program for this bad boy for about two years now, just wondered about other instances. I also use a 0.5mm on the teeth, great minds think alike bud! Link to comment https://qualityforum.zeiss.com/topic/15614-another-dayanother-gdampt-question-%C2%AF_%E3%83%84_%C2%AF/#findComment-84844 Share on other sites More sharing options...
[SH...] Posted June 3, 2020 Share Posted June 3, 2020 Please sign in to view this quote. Your correct, the teeth should not include.IMG_20200603_233507.jpg Link to comment https://qualityforum.zeiss.com/topic/15614-another-dayanother-gdampt-question-%C2%AF_%E3%83%84_%C2%AF/#findComment-84846 Share on other sites More sharing options...
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