In the second installment of this series on drum sound physics I discuss bearing edges and their affect on a drum's performance. Let's see if I can't distill this topic down to the important bits. Come join me!!

0:00 Introduction
2:11 Bearing edge definition and purpose
6:55 Keeping it simple two basic types of edges
9:50 Sharp edges
12:24 Round edges
17:10 Roundover edges
20:43 Single cut edges
21:41 Dual/counter cuts
22:13 Effect of edge angle on 'event horizon'
27:05 Effect of edge angle on drum shell mass
28:53 Conclusion


Part One of this series (dealing with mass of a drum shell):    • That's Not What I've Been Told!  Drum...  

Mike Mangini drums in ultra slow motion:    • Time Warp Drummer (HD)   (point of interest starts at 4:24).


Graphics used for teaching in this video came from:

Modern Drummer, Sept/Oct 2013 issue of Drum Business, https://www.moderndrummer.com/2014/12...
Play Drums By Ear, Drums And Hardware, Bearing Edges, Nov. 24, 2017, http://playdrumsbyear.net/blog/drums...
Rob Stapleton, PD Good’s Builder’s Manual, Bearing Edges, Dec. 20, 2009, http://pdgood.us/drumshed/bearingedge...