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Topic Date User

Offset cams: just for pin scars? 25-Feb-2011 At 11:23:18 AM Tommo

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On 25/02/2011 Gavo wrote:

>Only downside is that if the placement is not perfect fromthe start, they
>are so good as to bed in really hard.

Indeed, they like to stay put. A tip: never try and clean offsets by 'whipping' the draw/sling, which is common when cleaning normal nuts. I always use the nut-tool to give them a tap, however lightly placed, and recommend this to my seconds as well. Saves a lot of heartache.

And I beg to differ on crack shapes. I reckon, when I think about it, cracks formed by water erosion (eg. softer layers in a stratified rock like sandstone) or mechanical splits worn by the elements, tend to flare outwards (ie. rounded, or widening, from the back of the crack towards the front. Purely mechanically formed cracks (ie. a granite flake separated from a wall, a sandstone block that's split under pressure or movement) seem to be splitter and parallel sided. Though all this generalisation can go out the window depending on geology and climate of an area. I think this explains why offset cams are so much more popular in other parts of the world (eg, the US) where there is so much more granite.