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Originally Posted by gsx951
Sorry man but you shouldn't be measuring journals with a caliper. There is no way a caliper can resolve 1/10000"
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Of course not, but few people are ready to plunk down $100-$300 for a set of mikes for something that may be a one shot deal. The $16 vernier will give him what he needs to know or enough information that needs more investigation. It has other features that would require additional tools such as the depth gauge for blind stud or bolt holes, measuring for drill sizes when you don't know a tap size plus inside diameters. As a first precision tool it's hard to beat for the price. As it turns out we later learn it's a spare engine and not he's stuck in some driveway thinking he's going to slam dunk a rod bearing so he can get home. This may be more than he ever wanted to be involved with, and for certain he at least understands he has options and can with nominal expense glean enough to know if a machine shop is trying to put the screws to him.
Cheers,
GTM