123 Block question

[T Bredehoft]

Is it so hard to turn down Allen head cap screws?

 

[Masterjuggler]

Is it so hard to turn down Allen head cap screws?

For what reason? If the shaft is turned down to fit through the holes, they'll no longer thread into the next block.

 

[pontiac428]

Video posted by petertha is informative, thank you for that. A question, at 8:30 Renzetti knocks on the SHCS with a knocker, what is he doing there? I had a question, I have seen machinists bang on a workpiece with a dead blow hammer seemingly to seat workpiece onto parallels into vise. It always seemed unnecessary to me, I now see it is indeed unnecessary.

If I learned anything in my short time in CNC production, it was to always always wipe your vise jaws and seat your parts as you tighten them. One chip can cost you .005" misalignment, failing to seat with a dead blow or leaded hammer will cost twice that. After developing an "eye" and a "feel" for everything, the value of seating parts becomes obvious. Even more obvious when you mic every single part, shift after shift.

 

[T Bredehoft]

they'll no longer thread into the next block.

My error, the ones I was familiar with decades ago were OK except the counter bore for the screw head was too small. Sounds like carbide drill time.