Greg, I use the spiral flute taps every chance I get. Something that has worked pretty good for me is to drill the hole just a tad larger than the recommended diameter. I do have one 1/4 x 20 spiral flute tap that always makes tight threads so I need to trash it . Sure better to trash a tap before trashing the part the tap just broke off in. LOL In the case of mounting the scale a slightly larger tap hole diameter would not be a concern for me. Thanks for bringing us along. I tried to watch this video earlier today and You Tube kept taking me to some weird page trying to explain the rules on Pre-Teen videos. I guess the problem worked itself out.
I use spiral bottoming taps at work all the time. I hate them. The plus is they tap to the bottom of the hole. The minus is they're more brittle and easier to break. I'd rather drill my hole deeper where it's possible to avoid having to use a bottoming tap.
When they designed the K&T back in the 1930's they didn't put much thought into how the glass scales would mount. No really good way to do it but it looks like your plan will work.
Those engineer's were geniuses. But they definitely failed at seeing into the future! 😂 I have been working on this for probably 2 years now. This is the only thing I was able to come up with. At least on this machine. Maybe the bigger ons it was easier. 🤷🏼♂️
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Greg, I use the spiral flute taps every chance I get. Something that has worked pretty good for me is to drill the hole just a tad larger than the recommended diameter. I do have one 1/4 x 20 spiral flute tap that always makes tight threads so I need to trash it . Sure better to trash a tap before trashing the part the tap just broke off in. LOL In the case of mounting the scale a slightly larger tap hole diameter would not be a concern for me. Thanks for bringing us along. I tried to watch this video earlier today and You Tube kept taking me to some weird page trying to explain the rules on Pre-Teen videos. I guess the problem worked itself out.
Great idea with the standoffs...
Glad you liked it! I don't think there are any other alternatives for this machine.
Nice job Greg! This is definitely a tricky machine to mount a DRO on!
It's definitely not a "one size fits all" situation!
I use spiral bottoming taps at work all the time. I hate them. The plus is they tap to the bottom of the hole. The minus is they're more brittle and easier to break. I'd rather drill my hole deeper where it's possible to avoid having to use a bottoming tap.
Great point. I will definitely consider the alternative.
You got lucky on the broken tap. They almost never leave you enough to grab.
It's easier to be lucky than good! 😉
When they designed the K&T back in the 1930's they didn't put much thought into how the glass scales would mount. No really good way to do it but it looks like your plan will work.
Those engineer's were geniuses. But they definitely failed at seeing into the future! 😂 I have been working on this for probably 2 years now. This is the only thing I was able to come up with. At least on this machine. Maybe the bigger ons it was easier. 🤷🏼♂️
Looks complicated
Took me a while to come up with this idea.