The Jimmy Diresta Bandsaw Restoration, Part 8: Making a Taper Gage for setting a Taper Attachment

Merry Christmas to you and your family and to my fellow viewers!

That taper micrometer is a very nice piece of engineering. Very cool.

Certainly one way to approach the task.

When I was much younger, I worked in a small custom heat treat plant, the owner operator had a Doctorate in Metallurgy, I used to call him "Doctor" all the time and he would tell me to stop it :) "How long until that last batch of M2 is quenched" Me: "About 35 minutes, Doctor"

Hi Keith! For many of us retired mechanics/machinest's ,.... our get up and go has got up and went!;... but our minds have not gone away! We see our selves back in the shop doing work similar to what you are doing!; and many of us have a work shop at home. Sometimes you show us "this" is how I do it on MY MACHINES!.... IT may be different, but we want to arrive at the same result. We are ALL WAY"S learning, and your skills and math are teaching us that there is all way's a different way to "skin" a cat! Love your Video's, and hour long video's would be welcome! HAPPY HOLIDAYS...GOD BLESS! Gary

Good job. But you made a minor math error. Thankfully, the angles are small enough that the error isn't significant, but it is a fundamental error. The taper of 3/32" per foot means that the tangent of the desired angle is (3/32)/12 = 0.0078125 The 10 inches you mention for your sine plate is the hypotenuse of a right triangle, not one of the two perpendicular sides. So the correct thing to do is calculate the angle using arctan of the tangent calculated: arctan(0.0078125) = 0.447614171 degrees. then calculate the sine of the determined angle sin(0.447614171) = 0.007812262 and finally, multiply by the 10 inches for your sine plate, so 0.007812262*10 = 0.07812262 Now, as you can see, the difference between 0.078125 and 0.07812262 is insignificant. But the reason for that is because the angle for your desired taper is so small, so the sine and tangent values are close to each other. If you were using a larger taper, the the differences become quite significant. For instance, if the half included angle was 5 degrees, then doing the math would result is a difference of 0.87488664 vs 0.87155743. And 10 degrees would be 1.76326981 vs 1.73648178.

Merry Christmas to all.

We always used a piece of ground round stock to set the taper attachment. Chuck it in the lathe, make sure it's running true and use an indicator to dial the attachment in with that.

One of my favorite sayings in the shop is, "need a tool, make a tool" this is a great example. Thank you for sharing.

MERRY CHRISTMAS TO ALL, GREAT VIDEO, SEE YOU NEXT TIME, GLAD YOU ARE BETTER...

MERRY CHRISTMAS.

Merry Christmas from Berri, South Australia.

Hope your Christmas has gone smoothly Keeith.

Merry Christmas to you and yours Keith! Regards, Duck

You are so blessed...

Merry Christmas, Mr. Rucker.

WHEW! I read a science fiction short story about a machinist who was called on to repair an alien space ship. He had to make the tools to make the tool that then made the tools that repaired the ship. My head is spinning. With every video I am even more impressed with your knowledge, skill, and craftsmanship.

Merry Christmas Keith and your family.

Hey Keith, HAPPY HOLIDAYS! See ya next year! Greg

Really fun project! One tiny suggestion. Magnetic fields love to close on themselves. You might get a bit more grip if you installed the magnets in alternating directions rather than all aligned.