643 Dial Depth Gage 0-.125" This gage has a knife-edge base and a needle point contact which has been hardened and ground. The knife-edge base has a cutout so the conical point can be precisely positioned for close work. Point is 1/2" (12.7mm) long with a 40ยบ included angle. In action, the inspector gently pushes against a surface plate or other calibrated surface. If needed, rotate the bezel dial's zero indication with the needle. Zero is then set and can be locked via the locking screw. 640, 640M Dial Depth Gages 0-1/2"/0-10MM 640 Dial Depth Gages The contact is slightly up into the base at rest. In action, the inspector sets the contact at zero, which is usually at the bottom of the base. Then the top button is pushed down to contact the work and the measurement is taken. 640R Dial Depth Gages These gages are the same as the 640 except they have reverse movement (no push button) and can easily be used with one hand. Simply set on zero and apply the contact to the work and read the measurement. Dial Depth Gages These depth gages are direct reading tools, referencing from their hardened and ground bases. All bases are 2-1/2" (64mm) long. They are quicker and more convenient to use than any other type of depth gage within their ranges and accuracy. Electronic Indicators can be furnished by special order. Depth Gages 640 Dial Depth Gages In Case Range Graduation Dial Reading Cat. No. EDP 640JZ 52705 0-1/2" .0005" 0-50 640RJZ 52709 640MJZ 55997 0-10mm 0.01mm 0-100 640MRJZ 56001 643 Dial Depth Gages In Case Without Case Range Graduation Dial Reading Cat. No. EDP Cat. No. EDP 643JZ 52714 643J 52715 0-.125" .0005" 0-25-0 Electronic version available from Special Order Division. 640 643 130 D epth G ages