3 EXPANDABLE ARMS FOR PRECISE DIAMETER MEASUREMENT
FLEXIBLE 3M SECTION CONNECTING MEASURING HEAD AND HANDLE
A QUICK LOW COST MEASUREMENT
EASILY IDENTIFIES DRILLING CAVE INS
(key for rock bolt anchoring systems)
CHECK BOREHOLE DIAMETERS ALONG 3M LENGTH
USER FRIENDLY & HEAVY DUTY
AUDIT BOREHOLES - GROUND SUPPORT & STABILISER SYSTEMS
APPLICATIONS
The borehole micrometer is a mechanical devise used to measure the diameter of a roof rock bolt hole along its length. The standard unit has a range of 25-37mm and a 3m flexible section (connecting handle to head). The hole diameter is read from an etched scale mounted on the handle. It works similarly to a calliper enabling the user to check borehole dimaters along the 3m length.
