Category Archives: Shop work

Tools and techniques for use in the gunmaker’s shop.

Making a Floating Reamer Holder for Chambering Barrels

First, as always, gather your materials.  You’ll need: A piece of scrap ~3″ long by 3/4″ diameter One ball bearing, as close as you have to 1/2″ is handy.  You can adjust this to any size over about 3/8″ – … Continue reading

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Shop-Made Barrel / AR-15 Barrel Extension Wrench

Wrenches for installing AR-15 barrel extensions are extremely specialized, and ridiculously expensive.  The wrench described here is suitable for torquing the barrel extension to the 140 ft/lb specification, and will also work for grabbing 1″ barrels as well.

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Cutting ACME and other square-ish Threads

In this exercise we will make a 2-10 Acme threaded rod. This is a practical size for use in a number of projects, so the result may be useful to you.  The general instructions can be applied to any square-ish … Continue reading

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Cutting internal threads on the lathe

In this exercise we’ll cut some internal threads. Internal threading is very much like external threading, but with two additional challenges: Getting over your fear of cutting internal threads. Remembering to dial the cross-slide in the opposite direction to back … Continue reading

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How to cut (external) threads in a lathe. Step-by-step.

Cutting threads is an indispensable part of machining.  The 60º external thread is the most common thread to be cut, and once you can cut it, no other thread (internal, external, whitworth, acme, square, etc.) is beyond reach. Tools required: … Continue reading

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