Are all Cam lobes the same shape?

Are all Cam lobes the same shape?

Laurelle Fridtjof's picture
By Laurelle Fridtjof | Nov 4th 2015 |
0
+1-1
3.1K

Featured product

Cams & Nuts
Alien 2015
Tech Rock claim that the Alien Cams are the best 4-lobed camming units in the world because of their superior flexibility and manufacturing process. The lobes are somewhat softer than those on other camming devices which helps to maintain a better grip on the rock and ensure that they won’t let you down.
Shop now
Alien 2015

Add a comment:

Login or sign up to answer the question.

Dave Thexton's picture
Climbing Gear Geek
Nov 4th 2015
Hi Laurelle, This is my kind of question! Cam lobes aren't all the exact same shape, but they are all forms of logarithmic spirals. The key property of a logarithmic spiral is that any straight line originating from the centre of the spiral will always intersect the spiral at the same angle. The reason for integrating this shape in the construction of cam lobes, is that the lobe will make make contact with the rock at the same angle throughout the cam's entire range. Depending actual angle is dependent on the shape of the lobe. The challenge for engineers is to find the perfect angle that wont let the cam slip out when you fall, but will produce enough friction to hold when your weight is on it. Hope that helps, Dave

Login or sign up to reply.

0
+1-1