Modulus Arms Heavy-Duty Universal AR-15 80% Jig, Инструкция по эксплуатации

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January 14, 2016
www.ModulusArms.com | Heavy-Duty Universal AR-15 80% Jig Instructions 18
Milling Trigger Slot: The end mill should already be installed in the router. Move the base of the router
until the tip of the end mill is at the eleventh line in slot “A”, shown in Figure 22. Place the router into
the opening labeled “A” and into the hole previously drilled. You will always use this as a starting
location for this step. Be sure not to touch the sides of the opening when you start the router. Start the
router and allow it to come completely up to speed. Start to move the router removing material. Start
by moving in a semi-circular motion in small clockwise steps. Press down firmly to prevent the router
from lifting. Do not try to move the router in one straight direction but rather in smooth half circles
removing small amounts of material as you proceed. When you reach the template, trace the inside
diameter of the template in a clockwise motion. Be sure to remove as much material as possible before
touching the template or tracing the template. Do not push hard against the template. A gentle touch is
enough. When the opening is the same size as the template turn off the router, wait for it to completely
stop and remove it. Adjust the router base so the end mill is at the next mark on the depth gauge.
Continue in this pattern until you exit through the bottom of the Lower Receiver.

Note : DO NOT INSERT OR REMOVE THE END MILL FROM THE TEMPLATE WHILE THE END MILL IS
SPINNING. THIS IS DANGEROUS AND THE MOST COMMON CAUSE OF BROKEN END MILLS OR
DAMAGED JIGS/LOWERS.

Note : Be sure the end mill is very tight in the router. Tighten it as much as possible. Check
regularly

Note : If the router begins to whine or vibrate during milling, turn the router off and remove it
from the template. Inspect the end mill and be sure there are no chips jammed into the teeth of
the end mill. If there is, use a tool to remove the stuck chips. A small screwdriver or pencil works
well. Be sure not to damage the teeth.

Note : If you have a shop vacuum, use it. Run the vacuum whenever you are milling. If you do not
have a shop vacuum, stop regularly are remove the chips. If they build up, they can become
stuck between the end mill and the template and melt. This build up can be removed from the
end mill with sand paper. Use of a cutting fluid or WD-40 is recommended.
Figure 22: Trigger Slot Depth Setting