Standard Stud Mount - PCB Piezotronics IMI SENSORS HT645B01 Installation And Operating Manual

Standard Stud Mount Procedure 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 surfaces, as the potential for misalignment and
limited contact surface may significantly reduce the sensor's upper operating frequency range.
Figure 6 – mounting surface preparation
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-machined mounting surface with a minimum finish of 63 µin [0,00016 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 transmissibility by filling small voids in the mounting surface and
increasing the mounting stiffness. For semi-permanent mounting, substitute epoxy or another type of adhesive.
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 torque (see enclosed specification data sheet for
proper mounting torque). It is important to use a torque wrench during this step. Under-torquing the sensor
may not adequately couple the device; over-torquing may result in stud failure and possibly permanent
damage.
0.250
0.350
B
2 to 5
1 . 1 T im e s
S e n s o r D ia m e t e r
A
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