Results 101 to 125 of 201
04-26-2011, 09:59 AM #101
Not ready to retire mine and stick them to the refrigerator yet, but considering how many pairs of Guides are in use in North America at the present two failures is significant. Lee, any more details on the BC pair? Skier weight, # of days?
Four years of use of Plum 135/145's by 65 kilo French guys on 160 race skis might not be too meaningful in this context.
04-26-2011, 10:26 AM #102Registered User
- Join Date
- Feb 2005
- North Vancouver/Whistler
Guys - I've asked my friend who's binding failed. Since these aren't my personal Plum bindings I will just be passing along information. It's up to my friend who had the failure mode to pass along the info. Thanks for the understanding in advance
04-26-2011, 10:28 AM #103
I posed a similar question and was told by plum that they put the guides through testing which is pushed beyond the limits. Several professional freeskiers ski on them regularly and this is the first failure they have heard of and are concerned with remedying the situation right away. They have been very accommodating and responsive so far.
04-26-2011, 10:39 AM #104
04-26-2011, 11:14 AM #105
I'm sure they'll sort this out, but in the meantime I'm glad to have tried and true FT12s. Anyone can make a solid binding that's heavy, but pushing the weight envelope as Plum has done can require some experimentation.
04-26-2011, 11:26 AM #106
04-26-2011, 02:06 PM #107
Well to be fair there have been ft 12 explosions recently as well. I think the popularity and ease of tech bindings and the BC in general has attracted a style of skier and accompanying size of ski being skied on terrain that mAy beyond the scope of any stated "rigorous" testing.
04-26-2011, 02:28 PM #108
04-26-2011, 07:35 PM #109
Fatigue is another matter. Al alloy is significantly more prone to fatigue failures in many applications.
Has anyone every seen a Dynafit break through the pincer socket?
Last edited by Big Steve; 04-27-2011 at 01:50 PM.
04-26-2011, 07:43 PM #110
In any case, keep in mind that there are probably at least 1000 times as many Dynafit bindings in use as Plums and they have a very solid record of reliability. I'm sure Plum will iron out the weak spots in time but it does take a while to engineer out the failure modes.
04-26-2011, 10:25 PM #111
BC.com has a closeup shot of a FT12 toe (I've never looked at one up close):
The wings almost look die cast...could they be zinc, or can steel be die cast Big Steve? Wouldn't think zinc could be strong enough. Spendy steel parts are sometimes investment cast with one-time ceramic molds, can't imagine Dynafit would use an expensive process like that though. Given the fine parting line they don't appear to be forged. The triangular window appears to have draft, which also suggests a cast part.
The blue tone looks like zinc plating, do the wings rust or do they corrode where scratched?
04-26-2011, 11:14 PM #112
04-26-2011, 11:45 PM #113
Maybe the wing was "cut" by a hard ski edge impact, then broke under load later. Might be hard to see a cut right at the crack, but Plum will probably be able to see it if there's one there. A thin layer of flexible epoxy on the outside of the wing would probably stop edge hits from getting into the aluminum.
04-27-2011, 07:36 AM #114
^^^^ that seems like a good idea but that added weight may deter me
seriously I will would not mind doing that as an added measure of safety, thanks. I do not see any impact, I was thinking the same thing. It could have cracked on the way up, some of the side hilling I was doing or the firmer snow coming into the gully we were skiing may have created some sort of hair line fracture that was just exacerbated by the following steep turns.
04-27-2011, 08:35 AM #115
05-02-2011, 03:28 PM #116
A brief tangent - has anyone had luck contacting the guys at Plum? I have sent two emails over the past few weeks and nothing via the "contact" page on the website.
If you have had success, can you PM me the email?
05-02-2011, 05:03 PM #117
PM Sent foreal**
I'm a cougar, not a MILF! I have to protect my rep! - bklyn
In any case, if you're ever really in this situation make sure you at least bargain in a couple of fluffers.
05-04-2011, 11:26 AM #118
Snapped a few quick pix of the Guides before shipping them to TC's buddy, if anyone wants to see these little works of CNC art up close and personal. (These photos should be 20 inches wide, don't know why TGR downsizes them, click on the link.) Sorry about the watermarks to discourage piracy, if Plum wants me to shoot their products they need to send me a pair. With brakes. ( ^=
Last edited by 1000-oaks; 05-04-2011 at 02:05 PM.
05-04-2011, 11:27 AM #119
A friend told me that PLUM will widen the mounting pattern on the Guide for next year, does anyone have any info on that? Sounds unlikely to me.
Glad ur OK from the pincher failure man, was pretty sure about switching to PLUM next year but I'll follow this and see were it ends up before buying.
05-04-2011, 12:32 PM #120Registered User
- Join Date
- Sep 2010
05-04-2011, 12:36 PM #121Registered User
- Join Date
- Sep 2010
05-04-2011, 02:11 PM #122
05-04-2011, 02:50 PM #123
7075-T6 makes sense because there are no welds. So doing the comparo, the next question is what steel alloy is Dynafit using and what is its UTS and YTS. Dynafit may keep that info secret. I used 6061-T6 and 4130 in my hypo because I'm familiar with those alloys. Some 4000 series steel alloys are 2X+ stronger than 7075-T6 and there are some modern steel super alloys 3X. The questions don't stop there because, as previously noted, fatigue potential is more complicated than merely looking at UTS/YTS and cross section size. I'll be watching how Plum responds to these two failures. I'd put a few bucks on a larger cross section at the pincer socket. Looks like Plum has some good engineers so they'll figure it out. Beautiful binding. Competition in the tech binding biz is a good thing for us consumers.
Last edited by Big Steve; 05-04-2011 at 03:38 PM.
05-04-2011, 03:17 PM #124
05-04-2011, 03:36 PM #125
There's some validity to that, but most Euro ski tourists encounter more ice than most NA tourists, and ice is the stuff that rattles the shit out of tech bindings and can lead to fatigue failures. There are means to test for fatigue potential via accelerated cycling -- and I'll assume that Plum did that -- but the final product testing of the Plum Guide is occuring on both continents by consumers.