Conversation 1
M: Can you explain this rejection?
I: there must be something wrong with it. Let’s look at the rejection slip. Yes the dimension between the pads is out of tolerance.
M: How much is it out?
I: About three millimetres.
M: Oh, no. There are thirty in the batch. Are they all like that?
I: No, I’ve checked the others and they’re all acceptable.
M: Are there thirty in there, or thirty-one?
I: I’ll check again, just a minute. One, two … twenty-nine, thirty, thirty-one.
M: Oh, that’s good. We’re all right then. I don’t know what happened.
I: The machinist probably used a reject when he set his machine up. Then he probably put it with the other parts by mistake.
Conversation 2
J: Tariq, this should be a light push fit but it didn’t feel right when I measured it with the plug gauge.
T: The hole must be too small.
J: No, the size can’t be the problem. I’ve just checked this hole and it measured within tolerance.
T: Have you got the drawing?
J: I’ve got it over here. It’s part number 3785-65D. That’s the hole just there.
T: Mmm. Twenty-five mmillimetres plus or minus nought point nought two one. It’s not out of round. Have you checked the surface finish?
J: No, not yet. That could be the problem.
T: It looks a bit rough to me. Write up the rejection slip and send it back. Make a note. The machine shop might be able to rework it.
J: OK. Thanks, Tariq.