For those of you that are precision shooters, you probably load your own cartridges and are aware of how time consuming case prep can be. I purchased a RCBS Trim
Pro Power Case Trimmer to help speed the process along. Although it helped, it was still time consuming to load and unload the cases and did not leave my hands free for the deburring op. One day I got to looking at my pile of parts and decided to add a few pneumatic cylinders, flow controls, and a foot valve to the trimmer.
The end result is crude, but my foot now controls the two levers that use to require my hands and has freed up enough time between cases that I can trim and debur simultaneously. This video was shot with an old camera that wouldn't focus, but you get the idea:
Dear Sir:
ReplyDeleteWould you consider answering a few specific questions about the RCBS Auto Case Trimmer. Thanks for the consideration.
Did you have a specific question?
DeleteDear Sir:
ReplyDeleteThanks for the courtesy of a reply. I'd like to duplicate this case trimmer but need some guidance/suggestions on the individual parts required e.g flow controls, cylinders, etc. Will this trimmer work off those pneumatic nail gun compressors sold at places like Home Depot? Thanks for the consideration..
There are two air cylinders, 1-1/8" bore each, and three flow controls. Two flow controls regulate the air in and out of the horizontal cylinder and the third one regulates incoming air into the vertical cylinder. The horizontal moves the cutting head back and forth and the vertical presses on the release lever for the case. It only takes 30psi to operate the system and the flow rate is very low. I run the system with a 2 gallon, nail gun style compressor. It cycles the compressor ~once every 100 cases.
ReplyDeleteThe trick is setting the flow rates so the horizontal cylinder retracts the cutting head before the vertical cylinder releases the case. Both are controlled from the same air source which is switched via a foot pedal.
Dear Sir:
ReplyDeleteThanks for the courtesy of a reply. I'll start my search of the items needed on Ebay. Are the cylinders dual action? Is there any other modifications/enhancments you'd consider doing if you were to make another? Thanks again........
Both can be single-acting. I like the setup. It has run flawlessly since it was built and I haven't changed anything.
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