Rope Rescue/Equipment/Need/O ring

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== Requirements ==
== Requirements ==
-
* 2 steel o-rings for MAP @ ~$20 : $40
+
* 2 steel o-rings for MAP @ US$14.00 : US$28.00
* large. Needs to accommodate 2 ropes and 5 carabiners
* large. Needs to accommodate 2 ropes and 5 carabiners
* MBS: 20kN, prefer much stronger if used as single point of failure
* MBS: 20kN, prefer much stronger if used as single point of failure
== Products ==
== Products ==
-
* http://www.cmcrescue.com/product.php?dept_id=1057
+
listed in order of preference
-
** 44 kN
+
=== Yates 7800 Anchor Ring ===
=== Yates 7800 Anchor Ring ===
Rigging collection ring useful for many rigging and rescue applications. Drop forged alloy steel.
Rigging collection ring useful for many rigging and rescue applications. Drop forged alloy steel.
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=== Forged Steel MPA O-Ring ===
=== Forged Steel MPA O-Ring ===
 +
* ''less prefered: does not list price on-line
This is a bombproof forged steel ring commonly used for gathering a litter spider.
This is a bombproof forged steel ring commonly used for gathering a litter spider.
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== Discounted ==
== Discounted ==
 +
=== CMC ===
 +
* ''discounted: product no longer listed
 +
* http://www.cmcrescue.com/product.php?dept_id=1057
 +
** 44 kN
=== SMC Descending Ring ===
=== SMC Descending Ring ===
* ''discounted: too weak
* ''discounted: too weak

Revision as of 03:12, 18 September 2015

Contents

Requirements

  • 2 steel o-rings for MAP @ US$14.00 : US$28.00
  • large. Needs to accommodate 2 ropes and 5 carabiners
  • MBS: 20kN, prefer much stronger if used as single point of failure

Products

listed in order of preference

Yates 7800 Anchor Ring

Rigging collection ring useful for many rigging and rescue applications. Drop forged alloy steel.

  • "Large"
  • Strength 10,000 lbf/44kN,
  • 1/2 inch
  • 3 inch diameter ID
  • 4.00 inch diameter OD.

Forged Steel MPA O-Ring

  • less prefered: does not list price on-line

This is a bombproof forged steel ring commonly used for gathering a litter spider.

Perfect for any multi-directional loading situation.

Discounted

CMC

SMC Descending Ring

  • discounted: too weak

Product Number: 1410-117 Made in USA

Weight: 11g 

   Strength is 14.kN.
   Ring is rolled (not welded).
   3.8cm (1.5in.) inside diameter.

An aluminum ring that facilitates getting your rope back after rappelling. It’s cheap enough to leave behind, and light (so you can carry a bundle for alpine routes).

Fixe Descending Ring

  • discounted: too small
  • Weight: 95g
  • Rated at 50kn / 12,500lbs.
  • Inner Diameter - 1 3/8"
  • Outer Diameter - 2 1/8"
  • 10mm rod stock
  • Made in Spain

This ring is rated to a stout 50kN. It is made of stainless steel and works well for setting up durable rappel stations or lowering stations. Connect to hangers via maillons, chain, and so on, making sure all units are stainless steel to prevent galvanic corrosion. The steel wears longer but is heavier, so for alpine rap stations take along aluminum ones.

"It is large enough to put two carabiners and a rope through"

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