Nice job. I feel the same way about micrometers. The ratchet or friction thimble is too low of force to get the anvils set parallel to the work. I like using the feel portion also.

@Threadexpress

11 ай бұрын

Cheers!

Nice wrap up. Liked the reality check re warming the cylinder square with your hand and getting 1um movement just from that.

@Threadexpress

3 жыл бұрын

Thanks for the encouragement James - Cheers Cliff

Gr8 stuff right to the end...thanks!

@Threadexpress

3 жыл бұрын

Hi Ray. Good to hear. Thanks for the feedback. Cheers Cliff

Good info, and nice job on the cylinder square. Perhaps a better method of verifying the diameter of the cylinder remains constant from end to end, is to lay it down on the surface plate, and roll it under a DTI, and simply look for a relative change, rather than absolute measurement? It would help eliminate the variable of micrometer thimble "feel", springing the frame, etc....

@Threadexpress

10 ай бұрын

Hi Jeff. Good idea! Sometimes the obvious escapes us. Cheers, Cliff

@907jl

10 ай бұрын

In the process of making my first cylinder square, and finding your videos was a big help. New subscriber now! I've got it rough ground and ready to be carburized before finish grinding/lapping. ( it's 3"x6" and 8620 steel )@@Threadexpress

@Threadexpress

10 ай бұрын

@@907jl Cheers! Cliff

Are the threaded holes used as a lathe dog of sorts?

@Threadexpress

3 жыл бұрын

Yes a screw is installed as a drive dog. Cheers Cliff

Why couldn't you have used a 600 or 1000 grit carborundum sheet (blank side down on the granite) directly on your granite plate, instead of using diamond grit for lapping on a flat ground piece of steel?

@Threadexpress

Жыл бұрын

Hi - Well the tiny amount required to remove would be more difficult to control using paper that compresses and varies slightly in thickness, and cuts less evenly. Also it may shed abrasive on to the surface plate. But it might work. Cheers Cliff

no if its ground correctly it would be flat as f@%k i do it every day