Thread: What are you working on?

Mike mine is 0-3600 rpm & I usually have it set between 1/4 & 1/2. They usually don't get hot but about 3 weeks ago I was taking a blade out of some ivory scales & some jack ass used a hard piece of steel prior to that which is why the scales have a crack. My suspicions were correct when I was able to pick the old piece up with a magnet. This pin got hot but it didn't dull my bit, probably because I was using lube. Lube is your friend! I believe the scales are pressed ivory rather than carved.



It had a Joseph Rodgers & Sons blade in it. I wonder if it had another one in it whicj=h the scales came from the great ivory room they had. I have a nice blade for it but it's already in some nice ivory scales.

Ouch! That's rough.
Pressed ivory? First time hearing of it, but I assume it was done.
I wonder how? With a binding agent?

Thanks Jerry and Steve for the suggestions.

I think maybe it was a combo of high rpm, too much pressure, and cheap bits.
Actually it probably would have happened with expensive bits too.

Also I didn't have the piece clamped down, just was holding it, maybe that was a factor?

I'll never be a fan of celluloid, or any synthetic materials, just my preference. So I usually sell them or change them out if they were not original. Unless of course they are really nice or unique.

Recently I wrote about sharpening drill bits by hand and this is a related post. Spinning of a brass pin would be caused by the bit grabbing it which this is suppose to prevent.

I have not tried this but am thinking it sounds interesting.

https://www.youtube.com/watch?v=pAngKHIZgyA

Originally Posted by 32t

Recently I wrote about sharpening drill bits by hand and this is a related post. Spinning of a brass pin would be caused by the bit grabbing it which this is suppose to prevent.

I have not tried this but am thinking it sounds interesting.

https://www.youtube.com/watch?v=pAngKHIZgyA

Very interesting video indeed!

Implementing the technique on a 1/16 or 5/64 might be very challenging to say the least.

Originally Posted by engine46

My suspicions were correct when I was able to pick the old piece up with a magnet. This pin got hot but it didn't dull my bit, probably because I was using lube. Lube is your friend! I believe the scales are pressed ivory rather than carved. ...snip...
It had a Joseph Rodgers & Sons blade in it. I wonder if it had another one in it which the scales came from the great ivory room they had. I have a nice blade for it but it's already in some nice ivory scales.

Iron pins were not terribly unusual for heavy razors or ones which should not loosen.
JMO, YMMV

~Geezer

Originally Posted by 32t

Recently I wrote about sharpening drill bits by hand and this is a related post. Spinning of a brass pin would be caused by the bit grabbing it which this is suppose to prevent.

I have not tried this but am thinking it sounds interesting.

A hard Arky with a sharp edges meeting will do the job a lot easier then a full drill sharpening by hand. We often did this in the shops I worked at. Works for plastic also, keeps the bit from grabbing at breakthrough.
YMMV
~Geezer

I gave up on the drill press, now I use a rechargeable screw driver that takes 1/4" bits. But I use the drill bits with the 1/4" hex shanks. I start with a split bit in a pin vice to make a dimple in the center of the pin, then chuck up a regular drill bit to finish the job. The help of a magnifying glass to make sure everything stays centers.




Tonight I'm putting some brushes together for our give away guy, Dave. I guess were running a wee bit low.

I use a slowest running speed (260 RPM?) on the running drill-press and bring the pin up to the bit.
A rag on the vise raised up so my palms are upon it.
Works best for me. I can change angles and wobble as I need too.
Save the collars most times. Most easy on the scales as well.
Let the bit do the work, a drop of 3 in one oil........



Definitely need the Lord Dork visor for this!

Originally Posted by cudarunner

Very interesting video indeed!

Implementing the technique on a 1/16 or 5/64 might be very challenging to say the least.

I learned this trick in high school & forgot about it. Thank You for reminding me! Had an "Old School" machine shop & welding teacher in the early 70's!

Slawman

Indeed, my old foreman taught me how to grind the back of the edge to get chips out on tapered lathe bits after sharpening.
They were much larger than 1/16 of course!