Bosch PR20EVSK User Manual download pdf (Page 13)

www.ModulusArms.com

October 20, 2014

www.ModulusArms.com | AR-308 Jig Instructions

Figure 2.3: Lower shown with 3 holes drilled for the rear shelf pocket

Configure jig for milling: The configured jig is shown in figure 2.4 after the drill guide is removed.

Figure 2.4: Jig configured to mill out the rear pocket and trigger slot

Rear-shelf Pocket Milling: A router and ¼” end mill is used to form the rear pocket (figure 2.5, right) and

the completed lower with the completed rear-shelf pocket is shown in figure 2.6.

1. Figure 2.5 (left) shows the end mill adjusted to touch the top of the lower as indicated by the 1

hash mark. The distance to the next hash mark is the maximum depth of cut. It is suggest that

the starting depth of cut be made below the maximum depth and increasing the depth until one

reaches a safe and comfortable depth of cut that never exceeds the maximum. Figure 2.5

(middle) shows the end mill depth set for the final pass to achieve the targeted depth of 0.630”.

2. With the router set for the 1

pass depth, insert the router through the jig and into any of the

three previously drilled holes without the end mill touching the drill hole wall. Carefully turn on

the router allow the router to come up to full speed. (figure 2.5, right)

3. With firm downward pressure applied to the base, mill using shallow clockwise passes with light

pressure. First adjoin the three holes by removing the rib between the holes, then widen with

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Bosch PR20EVSK User Manual Page 13