Kistler-Morse KM L-Cell Bolt-On - Manual (Page 30)

Chapter 4. L-Cell Installation on Horizontal Beams
4-5
greater than 3 /
4
” (19mm). If the thickness is less, drill all the way
through the metal and tap until cutting complete threads through
the other side. Minimum metal thickness is 0.1875” (5mm), which
provides six thread engagement.
Surface Preparation
1. See Figure 4-8. Mark position of beam axis and of drill template
mounting hole.
2. At the center of the L-Cell mounting location, drill all the way through
the web with the #36 drill bit. This produces the template mounting
hole.
2. Mark the surface preparation area for L-Cell A. Repeat for L-Cell B on
the other end of the web, if applicable.
3. Attach the coarse grit sandpaper to the grinder. Remove heavy paint
and rust with the grinder until a bare metal surface is achieved for
L-Cell A. Due to the use of coarse grit, the resulting surface is
somewhat coarse. Repeat for L-Cell B.
4. Replace the coarse grit sandpaper with the fine grit sandpaper. Grind
until the surface is completely down to bare metal and smooth to the
touch for L-Cell A. Repeat for L-Cell B.
Note:
The L-Cells must be mounted against smooth, bare metal. Remove
all paint and rust from the area where the L-Cells are to be fastened.
Drill and Tap
1. Using the #6-32 tap, thread the template mounting hole (drilled during
Surface Preparation) until the tap is cutting complete threads through
the other side. Remove any burrs from the hole.
2. See Figure 4-9. Starting with L-Cell A’s location, fasten the drill
template to the template mounting hole through the #5A hole, using
the #6-32 socket head cap screw. Use a level to ensure correct
orientation (45° angle to the horizontal).
3. Drill the L-Cell mounting holes with the #36 drill bit, using the template
guides as follows:
A. Drill hole #3.
B. Insert a spare drill bit through hole #3 in the template to hold
securely in place.
C. Drill hole #2 and #4. Remove spare drill bit from hole #3.
4. Loosen the screw securing the template and rotate the template until
the tap guide ia aligned with hole #2. Retighten the screw securing the
template. Using tap guide, thread hole #2 with the #6-32 tap. Repeat
step 4 for hole #3 and #4.
5. Repeat Steps 1 through 4 , starting from Surface Prep for L-Cell B on
the other end of the web or other side of beam.
6. Remove burrs from all the holes created.
Installing L-Cells
Figure 4-9. Drill and Tap Template
Template Mounting Hole
(mount here with #6-32 x 1
5 / 8 ” screw)
0° Level
Bubble
45°
Level
Bubble
Notes:
1. After L-Cell mounting holes drilled, rotate
template to use tap guide to tap holes.
2. Holes #1 and 5B and 0° bubble not used
for this application.
2 3
1 4
5A
5B
Tap Guide
Drill Guide
(typical,
# 2, 3 and 4)
3/8” from centerline
Figure 4-8. Mark Position
Notes
1.Use lubricating fluid (Relton RapidTap
®
Heavy Duty Cutting Fluid
or equivalent) when drilling and tapping.
2.Drilling and tapping instructions assume a metal thickness