Up until today I only had one small import surface gage I purchased new from Grizzly. Not a very large base or much mass. I scored 4 different surface games off of eBay with plans of using one as a squareness comparator. I threw my Shars .0005 test indicator and started checking out some large Caterpillar dozer wrist pins that I’d like to use as a squareness standard for my small home machine shop. The larger wrist pins come out of a 3508B V-8 out of a D11R, and the smaller wrist pins came out of D348 V-12 D10 “A” models.
Larger ones are 2.755” dia x 5.25” tall and the D348 wrist pins are 2.000” dia x 4.295”
Both the larger ones at a height of 5” check about .002” out of square.
Here are my options I see,
Mark the square where the halfway/.001” mark is and call that square,
Try sanding down the base on the side that is too tall that causes it to lean away from the test setup,
Not sure how this would come out, try chucking it up in my South Bend Heavy 10, make sure it’s in the Lathe square/zero runout and try facing the end.
I don’t have any sort of powered precision grinding equipment.
They are all very round, I’ve checked all over to make sure they aren’t out of round or have any slight tapers or anything like that.
I’m open to ideas or thoughts of my little project.
Should I use the V portion of my surface gage to put the cylinder square in? Or should I build a slight convex steel “bumper” to attach to the front of my squareness comparator tester.
Larger ones are 2.755” dia x 5.25” tall and the D348 wrist pins are 2.000” dia x 4.295”
Both the larger ones at a height of 5” check about .002” out of square.
Here are my options I see,
Mark the square where the halfway/.001” mark is and call that square,
Try sanding down the base on the side that is too tall that causes it to lean away from the test setup,
Not sure how this would come out, try chucking it up in my South Bend Heavy 10, make sure it’s in the Lathe square/zero runout and try facing the end.
I don’t have any sort of powered precision grinding equipment.
They are all very round, I’ve checked all over to make sure they aren’t out of round or have any slight tapers or anything like that.
I’m open to ideas or thoughts of my little project.
Should I use the V portion of my surface gage to put the cylinder square in? Or should I build a slight convex steel “bumper” to attach to the front of my squareness comparator tester.
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