Recently picked up a 1941 M&P 38, with a knurled knob on the end of the ejector rod. Do I remove the knurled knob off of the rod, or do I unscrew the rod from the cylinder to remove the cylinder from the yoke? TIA.
Ejector rod removal???
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The extractor rod (including the knurled end) is one piece and has fine threads going into the cylinder.
Best way to remove it is to put a few empty brass cases into the cylinder and use a non-marring material on the end (leather or similar) to protect it from the tool used to unscrew it. It has a standard right handed thread pattern (left or counterclockwise to loosen).
Best way to remove it is to put a few empty brass cases into the cylinder and use a non-marring material on the end (leather or similar) to protect it from the tool used to unscrew it. It has a standard right handed thread pattern (left or counterclockwise to loosen).
OP
I guess that explains why a day's worth of Kroil didn't loosen the knob, huh?...Doh, but it sure looked like it should have unthreaded...
DWalt
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I use pliers and a piece of leather. Some use a drill chuck. Fired cases in chambers are necessary. There are also clamping tools made for that specific purpose. Late revolvers have LH threads.
Brownells has a tool that consists of two pieces and can be placed over the rod and bolts tightened to properly unscrew the rod. It is cheaper than replacing an extractor rod that has been buggered up by ill fitting tools. And you can reuse it time after time! 
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The very early K frame 38s (model 1899) have a separate extractor rod tip…which of course unscrews itself and gets lost. Probably the reason for the one piece rod, along with the addition of the front locking point.
My 1/2 drill chuck will go over the knob and tighten onto the rod. The rod goes in far enough that the knob does not contact the inside of the chuck. Tighten as you would a drill bit and hand turn the rod. Soaking the cylinder assembly in penetrating oil is always a good idea.
OP
I just put it between my rubber vice jaws and it came out easily, thanks. IIRC, isn't there a machined "groove" on the rod, or something, indicating LH treads?
DWalt
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Yes there is, or should be. A circumferential groove in the rod, beneath the knurling.
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