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 terapr0
      
Location: Sauga City
Gender: Male
www . tohellandback . net
 |  |  | Re: rope work
<Reply # 220 on 10/13/2010 10:16 PM >
|  | | | posted this in the "devices created for ue" thread over in the rookie forum, but thought some of you guys might enjoy seeing it too.
These were just a 1st revision test....they work really well, but I need to make new ones with lowered axles and aluminum frames as this first batch is much too heavy being completely stainless steel.
original post:
Here are some edge rollers I made today at work. The frames were laser cut from 0.125" stainless steel and formed on a brake press. The roller axles are 3/8-16x5.0 socket cap screws and the rollers are 0.5 OD stainless steel tube.
The next design revision will definitely have lowered bars (right now I think they're a bit too high, although a loaded rope is quite difficult to persuade off, especially under static rappel forces) and the frames will be aluminum. The stainless is nice and all, but its fucking HEAVY!
I still need to properly de-burr them (might just sandblast the frames) and I'll probably get them powder coated a dirty fresh lime green.
Next ones I'm thinking of making will use bearings (so as to be considered an actual "edge roller") and be shaped for 90° corners. a few ideas so far:
www.tohellandback.net |
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MindHacker
Location: Suburbs of DC
Gender: Male
If you spot a terrorist arrow, pin it to the wall with your shoulder.
| | Re: rope work
<Reply # 221 on 10/14/2010 4:15 AM >
| | | | I have a pair of the petzle rescue type pulleys (and a hardware-store 500lb WLL I've "retired" from climbing use) I use when I'm working with rope .
When we slackline we've always used 1" webbing, so it tolerates the tighter bends. And we need biners instead of pulleys so we can take advantage of the friction created to pin the webbing to itself and capture progress. Since it's only 4' off the ground and for fun, instead of 40' off the ground for living-saving, it's a much more casual affair.
"That's just my opinion. I would, however, advocate for explosive breaching, since speed and looking cool are both concerns in my job."-Wilkinshire |
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Witek
Location: Everywhere.
Gender: Male
onwards.
| | | Re: rope work
<Reply # 222 on 10/14/2010 5:21 AM >
| | | | Posted by terapr0
edge rollers
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What do you think about making the rollers out of plastic? Not exactly sure, but I think over time it would mean less wear on the rope. Not a huge problem I know, but it's something I'm wondering about.
Acetal (delrin) would do good in this situation with possibly a metal reinforcement bar press-fitted into a bored out hole through the x-axis of said piece. Teflon would work too, but being a stupidly expensive material to buy I wouldn't see it as being economical, it's also heavy stuff.
V-tech = V-Tek = Veetek = Witek. Make it count, say it right. |
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Therrin
 
This member has been banned. See the banlist for more information.
Location: North of Chicago, IL
Gender: Male
*Therrin puts on the penguin-suit
| |  | Re: rope work
<Reply # 223 on 10/14/2010 5:57 AM >
| | | | OMG those edge rollers are SWEET!!!
I like the look of the 2nd set of your CAD modeled ones. I think edge rollers which are strap-held for corners or biner/mallion tied in some way are better for actual use than something that's designed as a 90degree.
For the designed-as-a-90-degree ones, its ONLY good for a perfect 90-degree angle. For the other ones, you can offset the two units using either straps, mallions/biners, or whatever; and use them to adapt to whatever edge type situation you have.
Awesome stuff bro! Keep us updated on your progress with them and let us know when the finished model is out and when you'll be taking orders =)
I think the delrin is probably a good idea, except that I haven't seen any of the other companies who make edge rollers using it. There must be a reason for that. Perhaps it doesn't hold up under extreme loads or dynamic loading very well. I'd not worry about the weight of the tube rollers being plastic over metal for weight difference, to get instead the peace of mind that you get from using the metal rollers.
I actually bought some 2" tubular webbing today, along with some velcro and a new grommet kit. I'm going to make two new rope guard sheaths with prussik attatchments before our upcoming trip.
Give a person a match and they'll be warm for a minute, but light them on fire and they'll be warm for the rest of their life. =) |
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DJ Craig
  
Moderator
Location: Johnson City, TN
Gender: Male
Break the Silence
| | | | Re: rope work
<Reply # 224 on 10/14/2010 6:37 AM >
| | | |
This is AWESOME! The price of real edge rollers is ridiculous. Would you sell some?
"You have brains in your head. You have feet in your shoes. You can steer yourself any direction you choose. You're on your own. And you know what you know. And YOU are the one who'll decide where to go..." -Dr. Suess |
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dynastar666
Location: Burlington, VT
Gender: Male
| | | Re: rope work
<Reply # 225 on 10/15/2010 12:51 PM >
| | | | Posted by terapr0
posted this in the "devices created for ue" thread over in the rookie forum, but thought some of you guys might enjoy seeing it too.
These were just a 1st revision test....they work really well, but I need to make new ones with lowered axles and aluminum frames as this first batch is much too heavy being completely stainless steel.
original post:
Here are some edge rollers I made today at work. The frames were laser cut from 0.125" stainless steel and formed on a brake press. The roller axles are 3/8-16x5.0 socket cap screws and the rollers are 0.5 OD stainless steel tube.
The next design revision will definitely have lowered bars (right now I think they're a bit too high, although a loaded rope is quite difficult to persuade off, especially under static rappel forces) and the frames will be aluminum. The stainless is nice and all, but its fucking HEAVY!
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WOW! If you ever decide to sell these I would e very interested.
I shoot photos.
www.flickr.com/photos/dynastar666
www.developingpictures.org |
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\/adder
Location: DunkarooLand
Gender: Male
I'm the worst of the best but I'm in this race.
| | | Re: rope work
<Reply # 226 on 4/4/2011 9:55 PM >
| | | | Posted by loops
Personally I use a Grigri because I like that I can use it as a chest ascender, but everyone seems to be using 9mm ropes now, which are a little worrying with it.
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In response to this, petzl redesigned the grigri to work with 9mm ropes.
The Grigri 2
When I get done with school in a few monthes, I'll probably sell my lightly used grigri (first person $50 cash in hand gets it) and upgrade to the second edition.
Control is a bit jerky with 9mm|3/8" rope.
Hopefully I'm gonna have some free time to do a few illegal rappels this week, I miss it.
"No risk, no reward, no fun."
"Go all the way or walk away"
escensi omnis... |
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NiiCKx3
Location: W.V.
| | Re: rope work
<Reply # 227 on 4/6/2011 3:27 AM >
| | | | 200 ft of paracord... that would be for some sort of last ditch life or death situation though. I don't envision sites near me needing a lot of climbing/climbing gear.
Less breaking, more entering -- *tells cop we're taking pictures* "OF WUUUUT?!" |
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