Item is a combination contact/photo tachometer; provides precise rpm measurements with or w/out contact; linear surface speeds in ft/min or m/min
No other part numbers with same form, fit, and function found.
A tachometer designed to be held in the hand and whose spindle is driven by manually pressing it to the rotating object.
NSN 6685-01-429-5718
NSN 5950-01-478-6049
NSN 6240-01-210-0164
NSN 5930-00-912-6891
NSN 6620-00-119-2803
NSN 6145-01-060-0973
NSN 5945-01-428-7099
NSN 5998-00-229-4666
NSN 5950-01-308-0682
NSN 6650-01-135-9670
NSN 2925-01-159-0506
NSN 5930-01-158-4184