Kistler-Morse KM Microcell Bolt-On - Manual (Page 24)

INSTALLING MICROCELL™ SETS
Note
1. Procedures below refer to Microcells™ A
and B, but also apply to Microcells™ C and
D (if applicable to installation).
2. Use lubricating fluid (Relton RapidTap ®
Heavy Duty Cutting Fluid or equivalent)
when drilling and tapping.
3. Drilling and tapping instructions assume
metal thickness greater than ¾” (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 4-6. At the center of the
Microcell™ mounting location, drill all the way
through the web with the #29 drill bit. This
produces the template mounting hole.
2. See Figure 4-6. Mark the surface preparation
area for Microcell™ A. Repeat for Microcell™
B on the other side of the web.
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
Microcell™ A. Using this grit of sandpaper will
cause the surface to be somewhat coarse.
Repeat for Microcell™ 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 Microcell™ A. Repeat for
Microcell™ B.
Note
The Microcell™ must be mounted against
smooth, bare metal. Remove all paint and rust
from the area where the Microcell™ is to be
fastened.
DRILL AND TAP
1. Using the #8-32 top, 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 4-7. Starting with the location of
Microcell™ A, fasten the drill template to the
template mounting hole through the center
hole, using the captive #8-32 socket head cap
screw. Use a level to ensure correct
orientation (45° angle to the horizontal).
3. Using the #29 drill bit, drill two ¾” (19mm)
deep holes in the web through the template
drill guides.
4. Loosen the screw securing the template and
rotate the template until the two tap guides line
up with the drilled holes. Push the #8-32 tap
into one of the tap guide holes to align the
template. Retighten the screw securing the
template.
5. Using the #8-32 tap, thread the holes through
the template tap guides. Tap to a minimum
5 /
8
” (16mm) depth, full threads. Remove the
template from the web.
6. Repeat Steps 2 through 5 for Microcell™ B on
the other side of the web.
7. Remove burrs from all of the holes created.
Figure 4-6. Prepared Mounting Surface.
Figure 4-7. Drill and Tap Template.
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