Manually and freehand tapping some 1/4-3/8 sheet? stainless. 1/2-13 or something like that, through tap. Didn't actually pay attention to what the hole diameter is, but its supposed to be good. Coolube 2210? Tapping head, 213-180rpm not sure what the tapping head reduces to. Added a chamfer that would fit a .505" pin on both sides, enough that it would just fit... sometimes a smidge more. I measured the tap at .505" but the part I could measure wasn't full diameter, so I figured it was good. (told a bad bur gets made without this)
Got a go and nogo gauge and the nogo will go, if you back it off, then go back in enough times, on some holes. (moving chips out of the way?) Other holes it won't even screw in unless cocked sideways. Some sort of clamp holds the part down to keep the tap from picking it up.
I've tried to line it up the best I can before clamping it. I already did a handful of these and they were fine, (I think they were, I wasn't checking every single hole like I am now...) but after them it was like I was trying new taps to fix burs on the threads and this problem, but have gotten nowhere. (I thought the burs were happening right before the nogo would go though)Brand new tap 3 holes done, clean, then a set of nogo holes after them. (part has several of these tapped holes) This part only has like 3-4 threads.
Someone else did 2 holes when I was having issues, they didn't even clamp it but didn't seem to have issues. They checked the holes and left. They called it good but I didn't actually get to see the turns. Later me wondering if it was just chips or if threading the gauge several times would make the nogo go. I think it ended up going at least 1/2 turn. I don't seem to have the muscle to hold it down without the clamp.
I get to go back to this tomorrow and already feel like I'm going to get fired....
Need help.
Thanks,
Awaqa909
Got a go and nogo gauge and the nogo will go, if you back it off, then go back in enough times, on some holes. (moving chips out of the way?) Other holes it won't even screw in unless cocked sideways. Some sort of clamp holds the part down to keep the tap from picking it up.
I've tried to line it up the best I can before clamping it. I already did a handful of these and they were fine, (I think they were, I wasn't checking every single hole like I am now...) but after them it was like I was trying new taps to fix burs on the threads and this problem, but have gotten nowhere. (I thought the burs were happening right before the nogo would go though)Brand new tap 3 holes done, clean, then a set of nogo holes after them. (part has several of these tapped holes) This part only has like 3-4 threads.
Someone else did 2 holes when I was having issues, they didn't even clamp it but didn't seem to have issues. They checked the holes and left. They called it good but I didn't actually get to see the turns. Later me wondering if it was just chips or if threading the gauge several times would make the nogo go. I think it ended up going at least 1/2 turn. I don't seem to have the muscle to hold it down without the clamp.
I get to go back to this tomorrow and already feel like I'm going to get fired....
Need help.
Thanks,
Awaqa909