Standard Stud Mount - PCB Piezotronics IMI SENSORS M645B10 Installation And Operating Manual

Standard Stud Mount Procedure
This mounting technique requires smooth, flat contact surfaces for proper operation and is recommended for
permanent and/or secure installations. Stud mounting is also recommended when testing at high frequencies.
Note: DO NOT attempt mounting on curved, rough or uneven sufaces, as the potential for misalignmen and
limited contact surface may significantly reduce the senor's upeer operating frequnecy range.
Figure 6– direct adhesive mounting
1/4-28 stud 1/4-28 Captive Screw-*
A (in) 0.250
B (in) 0.350
Torque (ft-lb) 2 to 5
STEP 1 First, prepare a smooth, flat mounting surface, and then drill and tap a mounting hole in the center of this
area as shown in Figure 6. A precision-machines mounting surface with a minimum finish of 63 µin [0.0016 mm] is
recommended. (If it is not possible to properly prepare the machine surface, consider using an adhesive mounting
pad as a possible alternative.) Inspect the area, checking that there are no burrs or other foreign particles
interfering with the contact surface.
STEP 2 Wipe clean the mounting surface and spread on a light film of grease, oil or similar coupling fluid prior to
installation.
Figure 7– mounting surface lubrication.
Adding a coupling fluid improves vibration transmissibiliy by filling small voids in the mounting surface and
increasing the mounting stiffness. For semi-ermanent mounting, substitue epoxy or another type of adhesvie.
STEP 3 HAND – tighten the sensor/mounting stud to the machine, then secure the sensor with a torque wrench
to the mounting surface by applying the recommended mounting torue ( see enclosed specification data sheet for
proper mounting torque). It is important to use a toque wrench during this step. Under-toruing the sensor may
not adequately couple the device; over-torquing may result in stud failure and possible permanent
damage.
0.250
0.350
2 to 5
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