Drilled holes too big

[rabler]

Perhaps we should start a new topic thread entitled "What SNAFU followed you to the shop today"!!

SNAFUs? As long as I'm not limited to just one per day.

Our IT folks had a relevant saying. "No blood, no fire: no emergency".

I'm happy as long as it's only a snafu and not an emergency.

 

[Bi11Hudson]

Headuphis rectumus moment

Is not that a form of 'Cranio Rectitus'? I have regular bouts of that myself. The problem is not that the hole is too large, it's the screw that is too small.

.

 

[Richard King 2]

I have been drilling holes usually one size bigger on purpose when tapping. You may only get 75% thread or 50% thread depending on what it's for. Less tap breakage that way.

 

[Asm109]

The fix for this all too common malady is: Put hands on shoulders and PUSH!

 

[snoopdog]

I have been drilling holes usually one size bigger on purpose when tapping. You may only get 75% thread or 50% thread depending on what it's for. Less tap breakage that way.

I was hand tapping, and the tap fell through the hole so % wasn't an issue,lol

 

[Shootymacshootface]

Fubar parts just become other parts only smaller. It is the life cycle of metal.

I couldn't agree more!

 

[Eyerelief]

I had heard of the this technique before. The hole location is upgraded so that "better" material can be utilized. Absolutely brilliant idea!
My moto is "If you can't fix it, feature it"

 

[Janderso]

I was in the same boat yesterday trying to make a hex tap holder for a Jacobs chuck in the tailstock.
Everything went well till I stuck it in the hex collet holder with a 5/8 collet in the mill vice.
Laid out the 6 hole pattern to drill the holes used the boring bar to remove a lot of the mat'l down to 0.35, the thickness of the die.
Started drilling the holes and lo a behold I had not tightened the collet nut enough and the part turned a bit in the holder!!
Bummer!
back to the drawing board.
I have just enough stock left for 2 more attempts at this point.
Perhaps we should start a new topic thread entitled "What SNAFU followed you to the shop today"!!

I’m glad I’m not the only one that forgets to tighten the collet nut.

 

[projectnut]

I've seen this and other awshits corrected in the past. If a hole is in the wrong place, I've seen the problem resolved by fabricating a plug a couple thousandths larger than the hole. Press it in the hole, weld it in place (if it's at a critical point) and do a skim cut to restore the finish. If the hole is just too large go up a few sizes and tap it. Then make a threaded plug to fit. If it's for a threaded hole you can always make a left-hand plug and tapped hole to prevent the plug from unscrewing when the fastener is inserted. Use some hi temp Loctite to hold it in place, then do a skim cut to restore the finish. Once the Loctite has dried you should be able to drill and/or tap the hole to the proper size.

Just remember it isn't a mistake if the boss doesn't see it.

 

[Larry$]

This is were woodworkers with wood heating have an advantage.