DMM Dragon Range
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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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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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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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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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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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I thought it was 14 but upon googling the subject, it appears to be 14.5 |
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Eric LaRoche wrote:For all intensive purposesIt's "for all intents and purposes" |
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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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Jon H wrote: It's "for all intents and purposes"Seriously? I never knew that. |
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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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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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The dragons generally have slightly less range ... Its more noticeable on some sizes than others |
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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. |