Before using a gauge, wipe them with a clean cloth to remove dust and dirt. Before using a gauge, Check the gauge for any rust, flaw, burr, etc. if rust, flaw or burr is found, remove it carefully.

When using a gauge, apply a sufficient amount of antirust lubricating oil of good quality the gauge. Check that dust and cutting accumulated on the Product have been thoroughly removed, and then inspect the product with a gauge.

A cloud of dust accumulated on the product will excessively precipitate wear of the gauge. When using a limit gauge, check that Go gauge Passes and then check that NOT GO gauge stop. When inspecting a threaded product with a taper thread gauge, do not screw in the gauge rapidly to the end. Otherwise the gauge is suddenly inserted so that it will not come off. So carefully screw in at the final insertion.

Pay attention to the condition of the opening of a product. A dent, burr, etc. may lead to misjudgment by the gauge. Especially when inspecting a threaded product an error in judgment will easily occur due to inclination of the incomplete thread. Do not hit the gauge by strong force.

For Example, when Passing GO gauge or drawing an immobilized gauge do not hit or shock it strongly with a hammer etc. otherwise the gauge will flaw break up and deform thus losing its function. if the gauge is dropped by accident check the extent of damage and remove burr properly and cross check with technical person.