Kistler-Morse KM L-Cell Bolt-On - Manual (Page 49)

Chapter 5. L-Cell Installation on Skirt-Supported Vessels
5-12
Drill and Tap
1. Using the #6-32 tap, thread the template mounting hole for the outside
L-Cell (drilled during Surface Preparation) until the tap is cutting
complete threads through to the other side. Remove any burrs from the
hole. See Fig. 19.
2. See Figure 5-20. Fasten the drill template to the template mounting hole
through hole #5A, using the #6-32 x 1
5 / 8 ” socket head cap screw. Refer
to the 0° level bubble while positioning the template to ensure proper
orientation.
Note
Steps 3 through 5 instruct you to drill and tap completely through the
skirt. However, if the skirt thickness is greater than 0.4” (10.2mm), you
may choose to drill and tap to a minimum depth of 0.4” (10.2mm).
3. Drill the L-Cell mounting holes completely through the skirt with the #36
drill bit, using the template drill guides as follows (Fig 21):
A. Drill hole #2.
B. Insert a spare drill bit through hole #2 in the template and skirt, to
hold the template securely in place.
C. Drill hole #1 and #3. Remove the spare drill bit from hole #2.
4. See Figures 5-22 and 5-23. Tap the mounting holes:
A. Loosen the screw holding the template to the surface, and rotate the
template until the tap guide is aligned with hole #1. Retighten the
screw.
B. Using the tap guide, thread hole #1 with the #6-32 tap, until cutting
complete threads through the other side.
C. Repeat Steps A and B for hole #2 and #3.
5. Repeat Steps 1 through 4 on the inside of the skirt, starting from the
template mounting hole drilled on that side during Surface Preparation.
6. Using the 3 / 16 ” drill bit, drill a hole all the way through the skirt, 3.5”
(89mm) below the outside template mounting hole, for the cable routing.
7. Remove burrs from all holes created.
Figure 5-19.
Thread Mounting
hole
Figure 5-20. Fasten
Template
Figure 5-21. Drill
Mounting Holes
Figure 5-22. Tap
Mounting Holes
Figure 5-23. Tap additional
Mounting Holes