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eli poss
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May 24, 2015
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Durango, CO
· Joined May 2014
· Points: 525
I just bootied a DMM dragon cam yesterday (it took over an hour but it was totally worth it) and i really really like it. since it's raining today, i decided to read up on the cams and i found something that really surprised me: they have the same range as Camalots but they have a lower camming angle. i thought that higher camming angle meant more range, yet the dragons have a lower angle and identical range. how is this possible?
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eli poss
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May 25, 2015
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Durango, CO
· Joined May 2014
· Points: 525
so i compared the axles on the camalot and the dragon and the dragon's axles appear to have a little bit more space between them. is this what gives the dragons more range?
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rocknice2
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May 25, 2015
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Montreal, QC
· Joined Nov 2006
· Points: 3,847
The cam angle is only 1\4° less and the range is smaller on the DMM's. They are very close but the range is just a bit smaller as reflected by the slightly smaller cam angle.
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Eric LaRoche
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May 25, 2015
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West Swanzey, NH
· Joined Aug 2011
· Points: 25
For all intensive purposes they're the same. A Dragon #2 and BD 0.75 have .3 mm range difference. Pretty sure you won't notice.
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eli poss
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May 25, 2015
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Durango, CO
· Joined May 2014
· Points: 525
rocknice2 wrote:The cam angle is only 1\4° less and the range is smaller on the DMM's. They are very close but the range is just a bit smaller as reflected by the slightly smaller cam angle. IIRC DMM's cam angle is 13.75 and BD is 15 so it is 1.25 degrees less. i can't really tell a difference in the range, but i thought would given the difference in cam angle. i guess cam angle doesn't increase the range as much as i had expected
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rocknice2
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May 26, 2015
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Montreal, QC
· Joined Nov 2006
· Points: 3,847
I thought it was 14 but upon googling the subject, it appears to be 14.5 So yes the range is probably made up by separating the lobes father apart.
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Jon H
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May 26, 2015
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PC, UT
· Joined Nov 2009
· Points: 118
Eric LaRoche wrote:For all intensive purposes It's "for all intents and purposes"
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20 kN
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May 26, 2015
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Unknown Hometown
· Joined Feb 2009
· Points: 1,346
The lobes on the Dragon Cam are machined in such a way that there is less material between the end of the lobe and the end of the slot that the axle travels through. This leads to slightly more range. I am guessing that's the main factor.
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Eric LaRoche
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May 26, 2015
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West Swanzey, NH
· Joined Aug 2011
· Points: 25
Jon H wrote: It's "for all intents and purposes" Seriously? I never knew that.
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eli poss
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May 26, 2015
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Durango, CO
· Joined May 2014
· Points: 525
20 kN wrote:The lobes on the Dragon Cam are machined in such a way that there is less material between the end of the lobe and the end of the slot that the axle travels through. This leads to slightly more range. I am guessing that's the main factor. So, in laymens terms, that means that the slot in the lobe for the axles is wider? and aren't the lobes hot forged not machined? or are they both and i don't understand the manufacturing process?
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Larry S
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May 26, 2015
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Easton, PA
· Joined May 2010
· Points: 872
I think what he's saying is that the lobes have slightly more rotational range making up for the slightly shallower cam angle.
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bearbreeder
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May 26, 2015
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Unknown Hometown
· Joined Mar 2009
· Points: 3,065
The dragons generally have slightly less range ... Its more noticeable on some sizes than others In general the axles have the same spacing
;)
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Chris Owen
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Jun 4, 2015
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Big Bear Lake
· Joined Jan 2002
· Points: 11,622
DMM cam lobes are forged, BD cam lobes are machined. Forged aluminum is stronger because the grain structure is allowed to flow to match the geometry of the part. As an example carabiners are bent and forged from rod stock, as opposed to being machined from a solid block of aluminum.
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