Dynavector 507 arm lift assembly on a 501 arm

I'd be afraid the vibrations would destroy the bearings. Non?

I'm trying to discern what bearings and what vibrations you have mentioned. The arm lift is a passive device, and isn't capable of producing vibrations.

It has no effect on any bearings that I can discern. Can you elaborate?

Regards,

Dan

The actual arm bearings. With the drilling.

No, that's not a problem. The filings stayed close to where the drilling was happening, and the other saving grace is I have an air compressor that I was able to blow the filings away, making the arm and bearings nice and clean after the drilling was done.

Regards,

Dan

Hi Dan, when you drilled the post, the vibrations travel to the precision bearings causing them to vibrate and rub together. This can cause roughness or looseness. Or, if sapphire bearing cause them to shatter. I’m not sure how the bearings are configured in the DV but that would destroy an Ittok!

The arm was mounted upside down in the vise. I had wood under the arm lift support to take much of the pressure of the bit on the part being machined. The wood also kept me from having to tighten the vise extremely tight.  With the vertcal part of the arm positioned above the area being drilled, it pretty much kept all the shavings away from those bearings.

I used a 5/8" Forstner bit, which seemed to make a smoother, a  machinine-like  drilling method with less vibration than most drilling would cause.

At any rate, it turned out beautiful, and I'm very happy with the result.

Best regards,

Dan

Sounds good. Enjoy in good health.