How Do You Check ID Tolerance After Hone?

By using dial bore gauges with extensions of up to eight feet long. Sometimes the dial bore gauge will leave a minute black line in the finish honed bore, which is cosmetic only, and has nothing to do with the potential of cylinder failure.
If a customer so requests at the time of purchase order, ID readings can be obtained for up to five (5) places after the decimal. Please give us a call to discuss this option or use the quick contact form on the right of this page.
The mean diameter of the tube after hone will fall within the ID tolerance so given at time of purchase order. Tubing that falls under 4% OD to wall ratio could have one dimension under low limit, but the 90 degree dimension over high limit, thus achieving the mean diameter win thin tolerance. Most generally, tubing with this amount of excessive ovality will round up during the assembly of cylinder. At times, an excessive ovality could result in given area, say the end of the tube, irregardless of wall, due to manufacturing process.