My Lyman universal power trimmer (case trimmer) makes strange noises and completely butchers the cases. The case mouth is left with four distinctive diagonal-castle-shaped bumps.
This problem persist through different brands of cases (S&B, Magtech, Fiochi) and different types of cases (.44 sp/mag and 7.62x54r).
The bumping sound worsens over time and about halfway into the trimming process I am unable to continue because the cutter head seems to bounce off the case mouth.
It primarily happens when I am trimming .44 magnum cases to special length.
One distinct feature of the problem is that the more the case needs to be trimmed the worse the problem gets. A once fired and sized .44 special case that only needs to be cleaned up in the trimmer hardly has the problem. It just leaves very small dents in the case mouth.
It doesn't matter if I apply light, moderate or hard pressure on the the handle.
Does anyone know what is causing this?!?
It seems as if the motor doesn't have enough power to cut cleanly and/or that the cutter head is dull. The cutter head is a normal one, not the carbide.
The cutter is in great shape though and very sharp and the motor doesn't seem to skip or be obstructed in any way.
I bought this case trimmer second hand from someone who bought it but hardly used it because he build his own case trimming station.
I made a short video of the cutter butchering a case. You can clearly hear that the bumping sound worsens through the trimming.
http://www.youtube.com/watch?v=bbzQSmACXEQ&feature=youtu.be
And some pictures of a typical case. The first two pictures are of the case from the video that was a .44 magnum. The third picture is a typical .44 special case after just been cleaned up in the trimmer. This one was also trimmed from magnum to special length before firing and of the same brand. As you can see it just has two small dents.
This problem persist through different brands of cases (S&B, Magtech, Fiochi) and different types of cases (.44 sp/mag and 7.62x54r).
The bumping sound worsens over time and about halfway into the trimming process I am unable to continue because the cutter head seems to bounce off the case mouth.
It primarily happens when I am trimming .44 magnum cases to special length.
One distinct feature of the problem is that the more the case needs to be trimmed the worse the problem gets. A once fired and sized .44 special case that only needs to be cleaned up in the trimmer hardly has the problem. It just leaves very small dents in the case mouth.
It doesn't matter if I apply light, moderate or hard pressure on the the handle.
Does anyone know what is causing this?!?
It seems as if the motor doesn't have enough power to cut cleanly and/or that the cutter head is dull. The cutter head is a normal one, not the carbide.
The cutter is in great shape though and very sharp and the motor doesn't seem to skip or be obstructed in any way.
I bought this case trimmer second hand from someone who bought it but hardly used it because he build his own case trimming station.
I made a short video of the cutter butchering a case. You can clearly hear that the bumping sound worsens through the trimming.
http://www.youtube.com/watch?v=bbzQSmACXEQ&feature=youtu.be
And some pictures of a typical case. The first two pictures are of the case from the video that was a .44 magnum. The third picture is a typical .44 special case after just been cleaned up in the trimmer. This one was also trimmed from magnum to special length before firing and of the same brand. As you can see it just has two small dents.