While the part numbers changed by 1971, your pictures point out the following from left to right: straight collet plate, 60-degree collet plate and the 75-degree collet plate. The straight plate was used on rack toms, but also could be used in the middle of the bass drum. The 60-degree collet plate was for "slightly off-center" mounting on the bass drum, as can be viewed on the popular "Headliner" kit AND for bass drum spurs on both 18" and 20" bass drums. Finally, the 75-degree collet plate was for "right or left side mounting on the bass drum, as seen in the popular "Celebrity" kit AND for spurs on bass drums larger than 20". If you were to use the 60-degree collet plate on the larger bass drums, even with the proper 14" spurs, they wont touch the ground! Hope this clears things up.
Rogers bass drum mounting plate
Just so I'm clear, the mounting plates in your photo are, Left to Right:
90 degree 75 degree 60 degree
correct?
I'm no mathematician, but 60 degrees is more acute than 75 degrees, right? So wouldn't the 60 degree mount be used for mounting lower on the side of the kick, rather than the 75 degree angle mount, which is closer to a 90 degree, straight up right angle?
I think what I need is the 60 degree mount, not the 75 degree mount. Do you have any of those?
Lee
The reason for the 60 degree plate was for the top of the drum, not bottom. The curvature is different on the bottom not the angle. If you took a 75 degree and put it on a 22 {top} the angle would not be correct. These are generally used on a 20" bass drum on top. Altho some dealers were given virgin shells to drill and would just move a 75 degree lower on the side. I do not know if this applies to 360 drums ect. I only know about Rogers. Heres a pic with the angles laid on their side and is usually the best way to tell. I have one you can have for the cost of shipping {prolly not mint}. If I can find it. lol PM me or most know my email by now. Thanks.
Isn't this correct? And therefore wouldn't the 60 degree mount on the right in this picture be used for side mounting on the bass drum?
Lee
I know Rogers Swivomatic tom mounts come in 3 degrees of angle: 90; 75 and 60. My question is, are the same Swivomatic mounts used to mount toms, cymbals and kick spurs? Or did Rogers make specific mounts for each application? That is, if I have a 60 degree swivo mount that is said to be for kick spurs, can it be used to mount a tom?
Thanks,
Lee
The reason for the 60 degree plate was for the top of the drum, not bottom. The curvature is different on the bottom not the angle. If you took a 75 degree and put it on a 22 {top} the angle would not be correct. These are generally used on a 20" bass drum on top. Altho some dealers were given virgin shells to drill and would just move a 75 degree lower on the side. I do not know if this applies to 360 drums ect. I only know about Rogers. Heres a pic with the angles laid on their side and is usually the best way to tell. I have one you can have for the cost of shipping {prolly not mint}. If I can find it. lol PM me or most know my email by now. Thanks.
You are correct sir, 75 degrees for 20" and 60 degrees for 22" and 24". If you try and put a 75 on a 22 or 24 the spur won't touch the ground.
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