Tramming Tool Idea From Mr Pete

If there is interest, I will post pictures and explanation of an arbor to turn thin delrin washers. I intend to make one for the dial indicator when the shop warms up. The one I did make turns thin backup washers for a ProLift jack. Long story short, I bought a "correct" rebuild kit for the jack from the internet to save several trips to a local hydraulics repair shop. The ram piston is way too thin to fit on the end leaving a bunch of play. Contacting the supplier, he told me gravity would hold it in place. Never in all my years of repairing industrial and agricultural hydraulics was I ever told to use gravity in a repair. Come to find out the correct piston is no longer available and we couldn't source a backup washer for this ram so I made one.
 
Nice video. If rotating the dial indicator is not an option, how about divide the sum of two readings by 2, then get it almost lined up before rotating the indicator bar. Just cut the chase.
 
Here's maybe a stupid question. I've watched this video, and others. I made something a few years back for dual indicators, but lost it or threw it away. I didn't trust it, because I don't trust myself. So here's the maybe stupid question. Nobody talks about there being any requirement for the drilled holes to be perfectly perpendicular to the horizontally suspended portion. Is that because there isn't a precision requirement? If not, why not? Thanks guys.
 
jwmay said:
Here's maybe a stupid question. I've watched this video, and others. I made something a few years back for dual indicators, but lost it or threw it away. I didn't trust it, because I don't trust myself. So here's the maybe stupid question. Nobody talks about there being any requirement for the drilled holes to be perfectly perpendicular to the horizontally suspended portion. Is that because there isn't a precision requirement? If not, why not? Thanks guys.
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I guess any error made will be replicated the entire circle since it's mounted in the collet.
 
Yes, that occurred to me as well as I trammed the X axis after I built the indicator setup and set it perpendicular.
It wasn't enough to be discerned from any measuring I could do. I reasoned that although the two drill holes were not
perfectly vertical, they were parallel to each other so it wouldn't make any difference.
 
I prefer the spindle square. You can adjust the nod or tilt while looking at both dials till they come to the same value.
 
I watched most of Mr Pete's video, until the mirror came out.
I'll stick with my Starrett 196 that I can easily see in any position.
 
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