[h=3]Threaded Choke Tube Installation:[/h] Before moving to the threaded choke tube installation, it is critical to verify that the barrel is thick enough. While it is possible to measure the outside diameter of the barrel, subtract the largest diameter of the choke and divide by two; shotgun bores tend to never be truly centered and the walls may actually be thinner then calculated. To avoid this, we used a
Manson barrel wall thickness gauge to determine if the walls were thick enough for choke tube installation. More information on choke tube installation criteria can be found on
Brownells GunTech page.
The
Manson barrel wall thickness gauge measures the actual wall thickness of the barrel. This is a critical measurement that calls for the best tools in order for the threaded choke tube installation to be safely accomplished.
To install the removable Rem-Choke system you will need a reamer, tap and bushing.
Choke tube reamer (center),
tap (bottom) and bushing (top). The tap will work with both Rem-Choke and Win-Choke styles, however; the reamers are different.
Choke tube reamer, with bushing installed and tap handle.
After carefully measuring the internal bore diameter (in this case .726″), we select the appropriately sized bushing for the reamer and tap. This is critical, using a bushing that is too small will lead to poor results. To manually ream removable chokes, the reamer manufacturer recommends mounting the barrel horizontally in a vise.
Coated in Do-Drill oil, we begin the arduous process of reaming the barrel by hand. This makes back boring a barrel look easy. Every 10-revolutions, we removed the
reamer, brushed off the chips and reapplied the Do-Drill oil.
Success! We managed to hand ream an interchangeable choke tube. We took two breaks to go online and check out the metal lathe we wanted. It didn’t seem so expensive at the time.
Prior to tapping the choke, make sure you note how deep you need to cut. Running the tap too far can cause problems. Laying out a tube next to the tap allows us to determine the depth of cut.
We clean away any excess shavings and install the bushing on the
Rem-Choke tap. The barrel is oriented vertically and the tap is lightly coated with Do-Drill oil. We slowly turn the tap and cut the threads. The manufacturer of this tap specifies that you should not back off the tap to break chips as is typically done. Tapping was quite enjoyable after the hard work of manually reaming.
After cleaning excess oil and shavings from the barrel, we lightly oil the choke and screw it into place using our Magna Tip Choke bit.
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и там я для нарезания резьб ничего не нашёл(((
То что Вы чего то не нашли абсолютно не значит, что этого нет. По ссылкам что я приводил есть весь инструмент.