Why would you not show how you calculated the gauge block height? I think that's important and Machinists should be able to do this without referring to a book. I'll use your second angle choice as an example. 15 degrees 5 minutes (must convert to decimal degrees) = 15.0833 degrees SIN 15.0833 = .26022 .26022 x 5. (5 inch sine plate) = 1.3011 1.3011 is your gauge block height. I rounded everything to the fourth decimal place.
My Buddy gave me a sine plate. I hadn't a clue how to use it until now. It's pretty cheesy! Thank you again, Oh yeah, I just got my 2' x 3' Collins Micro-flat Headstone in.. Mark
Sorry to be critical, but a few points: 1. "Just the right amount of oil" is not what holds the blocks together and is poor practice. It's the flatness of the block faces that, when in proper condition, and when wrung properly, will exclude all air to allow atmospheric pressure alone to hold the blocks together in intimate contact. By using your skin you are also likely to transfer salts in your sweat to the block surfaces that can dry in place and scratch the fine finish. The surfaces must always be as pristine as possible. Using a clean chamois dedicated to the task is usually recommended by most gage manufacturers. 2. The rightmost decimal is the smallest, not the largest. And we have calculators nowadays to calculate sines. No need for tables. Just multiply the distance between roll centers by the sine of the angle required.
Sorry to be critical: but you are wrong. Gauge blocks cling together perfectly in a high vacuum where there is no air pressure. It is thought the forces of molecular attraction (not magnetism) are the dominating force.
gauge blocks stick better when there's nothing on them at all, especially no skin oil. good hygiene would be to not touch the wringing surface of the blocks at all. nice sine plates though.
Why would you not show how you calculated the gauge block height? I think that's important and Machinists should be able to do this without referring to a book. I'll use your second angle choice as an example.
15 degrees 5 minutes (must convert to decimal degrees) = 15.0833 degrees
SIN 15.0833 = .26022
.26022 x 5. (5 inch sine plate) = 1.3011
1.3011 is your gauge block height. I rounded everything to the fourth decimal place.
My Buddy gave me a sine plate.
I hadn't a clue how to use it until now.
It's pretty cheesy!
Thank you again,
Oh yeah, I just got my 2' x 3' Collins Micro-flat Headstone in..
Mark
Nothing cheesy about it. If you are going to set angles for cuts, what is better to use? This is the way.
Sorry to be critical, but a few points:
1. "Just the right amount of oil" is not what holds the blocks together and is poor practice. It's the flatness of the block faces that, when in proper condition, and when wrung properly, will exclude all air to allow atmospheric pressure alone to hold the blocks together in intimate contact. By using your skin you are also likely to transfer salts in your sweat to the block surfaces that can dry in place and scratch the fine finish. The surfaces must always be as pristine as possible. Using a clean chamois dedicated to the task is usually recommended by most gage manufacturers.
2. The rightmost decimal is the smallest, not the largest. And we have calculators nowadays to calculate sines. No need for tables. Just multiply the distance between roll centers by the sine of the angle required.
Sorry to be critical: but you are wrong. Gauge blocks cling together perfectly in a high vacuum where there is no air pressure. It is thought the forces of molecular attraction (not magnetism) are the dominating force.
Thank you , a very clear video brilliant
Glad you enjoyed it
gauge blocks stick better when there's nothing on them at all, especially no skin oil. good hygiene would be to not touch the wringing surface of the blocks at all. nice sine plates though.
How to measure center distance between rollers of sine bar