Major HIT-21 Instructions Manual

1825 VIA BURTON

ANAHEIM CA 92806

714-772-5202 / FAX [phone]

EMAIL: [e-mail]

WEB: WWW.MAJORMFG.COM

INSTRUCTIONS

FOR HIT-21

DRILL GUIDE

FOR INSIDE

MORTISE CYLINDER

WHEN USING POWER TOOLS

ALWAYS WEAR

EYE AND EAR PROTECTION!!

Copyright 2016—Major Manufactur-

Installing an inside cylinder on an existing mortise lock can be
frustrating to center correctly. The HIT-21 will make the job fast, accurate
and easy. You don’t even have to take the mortise lock out of the door.
Just remove the outside cylinder, thread the HIT-21 into the mortise case
until it contacts the mortise cavity on the opposite side. Next drill a pilot
hole then come from the outside in with a hole saw. Nothing could be
easier!

These are the most important tools that you

will use in this installation.

Always use
eye and ear

H

protection!!

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The HIT-21 is used to
locate and accurately drill
the inside cylinder hole for
a mortise lock when
retrofitting a single cylinder
to a double cylinder lock.

First remove the lock
faceplate and loosen the
cylinder retaining screw.

Next remove the outside
mortise cylinder and
replace with the HIT-21
drill guide.

Copyright 2016—Major Manufacturing

Thread the drill guide
in until it makes
contact with the inside
of the mortise pocket.

Shown at right is a drill
with a 1/4” drill bit. The
center of the HIT-21
has a hardened steel
sleeve.

Drill from the outside
thru the mortise
pocket. Drill slow, you
don't want to blow out
the other side.

The 1/4” diameter hole
is now in the center of
where the cylinder will
be located.

Replace the pilot bit of
your hole saw with the
supplied drill blank.

Drill the cylinder hole.
Use a low RPM and
back the hole saw out
several times when
drilling to remove
chips.

Copyright 2016—Major Manufacturing

When the hole is drilled,
remove the HIT-21 drill
guide.

You will have a perfectly
drilled cylinder hole.

Install the outside and
inside cylinders and
replace the lock
faceplate.

Check for proper
operation.

.

That’s all there is to it!

Copyright 2016—Major Manufacturing