Quote:
Originally Posted by flatheadmurre
Doesnīt matter if itīs a sunnen or a mitutoyo diallbore gauge from precision or performance point of view...sunnen use the measuring finger and a lock nut to adjust the zero on the dialgauge...others use fixed fingers and adjust the height of the dialgauge.
Not sure why a boregauge with fixed fingers(washers) would be any less accurate...tell that to mitutoyo 
For measuring inside a round hole and not just checking it against a std a 3-point micrometer is the way to go ! |
Hi "flathead", the difference is you cannot set the amount of "tension" using a "fixed" anvil (washers/shims) tool, can't happen!
The Sunnen's allow you to set the amount of tension. The "higher" tension at the "fingers" allows for "deeper" marks in the brg surfaces, in effect this MAY actually give a false reading as to the actual clearances??
Thanks, Gary in N.Y.
P.S. As for the accuracy of the dimensions either type/brand gauge is just as accurate! We use the Mitutoyo's for pin/rod and pin/piston checking, our gauges for these procedures measure in "tenths", not 1/2" thousandths!