Mountz MMTB Operating Instructions

MMTB (Miniature Break-Over Wrench) Operating Instructions
MMTB "Break-Over" Wrenches
These small production wrenches 'break-over' once reaching preset torque setting. Compact and well balanced, these
wrenches have a fixed head attached to it and are ideally suited for low torque settings or applications with tight space
restrictions.
Calibrating Torque Wrenches
To calibrate torque wrenches either use a torque tester or torque sensor within the range of the torque wrench. For break-
over torque wrenches calibrate torque in "Peak" mode with a digital torque tester or torque sensor Make sure to apply the
torque slowly and smoothly at the "Load Point Line" near end of the handle.
1. Select a torque tester or torque sensor that covers the torque range of the MMTB wrench. Connect wrench to the torque
analyzer or transducer using the appropriate adapters as needed (not supplied).
2. Apply torque clockwise slowly until wrench 'breaks-over' and note reading.
3. Adjust wrench to required torque setting as described below.
4. Test and repeat adjustment as necessary to obtain desired value.
5. Recalibrate torque wrench at prescribed intervals.
Adjusting Torque Setting
1. Remove plastic end cap from the handle.
2. Insert 3/16 hex key into adjusting screw and turn clockwise to increase
torque and counter clockwise to decrease torque. Verify the torque setting
using a torque tester or torque sensor. Do not adjust torque setting above
or below the recommended torque ranges of the wrench. Place end cap
back on.
Applying Torque
1. Toward the end of the wrench is the "Load Point Line." Grab handle at that "Load Point" end to apply torque. (If you
grab handle closer toward head, then you will apply more torque than what the wrench is set for. The wrench is a length
dependent tool).
2. Tighten nut or bolt by applying a steady even pull. Wrench should be kept at 90 degrees to axis of bolt during tightening.
When pre-set torque is reached, the wrench will 'break.' Stop pulling once 45º break angle is achieved.
2. Reset the wrench for the next application.
3. With its unique design, it's impossible to over tighten beyond the preset load.
Corporate Headquarters: 1080 North 11th Street, San Jose, CA 95112
Rev 2.2 (4/11/2017)
Load Point Line
Phone: (408) 292-2214 Fax: (408) 292-2733
www.mountztorque.com
Ref. Item # 500295
Adjusting
Screw
Handle
45º
90º
Set Screw