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Rockmore revolutionized the drilling industry with the launch of its first T-Series DTH model, the ROK 600T, a 6-in.class model that uses a tubeless QL6/QL60 bit shank. Last year the company released its ROK 60T-360T hammers that utilize the IR 360 bit shank without the blow tube/foot valve.

Looks to me like it would be easy to fabricate a new pin from a drill bit shank. The process of removing it might give a clue if other issues exist.

Volunteer Commando MK 45

A retaining pin can be made from a dowel pin, drill bit shank or possibly even a roll pin.

Ultra economy AR-15/22--part 2: no one is better at cutting costs than matthews, and here he builds a rimfire AR for just $375. you need the tools and the talent, but it's doable

The Patriot 50 accepts the QL50 bit shank while the Patriot 80 accepts the 380 bit shank.

Numa

The T series is "tubeless," as the name suggests (utilizing bits without plastic Blow Tubes), and achieves the goal of using industry bit shank connections, but without the plastic component imbedded in the bit.

Rockmore DTH hammer a 'high-performance tool'

The diameter of the main firing pin body is 0.227 inches, so I elected to use a section of 15/64 (0.234) inch drill bit shank for the part.

Custom firing pin for a Stevens single shot rifle: finding a firing pin for an old Stevens single shot rifle was unsuccessful. Making one turned out to be a viable alternative

A 2-inch piece of drill bit shank, music wire or a hardened screw shank can be used.

More improvised gunsmithing projects: Matthews taxes a break from big projects to show you several quick 'n easy jobs you can whip up in short order