Piezoelectric Pressure Sensor Type 601C/603C
Page
18
60xC_002-741e-08.18
4.3.2 Direct mounting (ANSI)
The following procedure is recommended for the manu-
facturing of the direct mounting bore with Kistler step drill
type 1331 and for use with ANSI floating clamp nut
6423B11 with a 5/16-24 UNF thread.
Fig. 9: Flush mounting bore
Fig. 10: Kistler step drill, Type 1331
1. Centering hole, use a center drill with 0.125
″
diameter
and 90° chamfer angle.
2. Ø0.2165
″
through-hole, use a spiral drill with 0.2165
″
diameter.
Ø0.328
″
countersink at the entrance of the 0.2165
″
blind hole, use a countersink cutter with a 90° chamfer
angle.
3. Ø0.248
″
blind hole, use a spiral drill with 0.248
″
diameter. Select the bore depth accordingly, so that
the front cutting lips of the spiral drill do not undercut
the residual wall thickness of 0.24
″
at the diameter of
0.2165
″
.
A too deep blind hole will damage the contact surface
to the sensor (shoulder) and thus the sealing surface.
This could result in leakage at low pressure.