Raumer climbing anchor expansion bolt with 2 rings

The Raumer climbing anchor expansion bolt with 2 rings is a top product. Firstly, it complies with the EN 959 and 795 standards, and secondly, it is great value for money. Thirdly, it is an ideal weight for alpine routes. Fourthly, it impresses with its AISI 316L steel quality. This makes the lower off extremely durable. It can be installed anywhere in the Alps. Consequently, you can’t go wrong with the lower off from Raumer Climbing!

Main advantage Raumer climbing anchor expansion bolt with 2 rings

The main advantage of this abseil anchor is that it is equipped with two rings. This has several advantages. Firstly, there is no need for a deflection carabiner. If you want to climb top rope, you have to attach your own quickdraws. If you want to rappel, simply rethread.

On the other hand, the lower ring can be bent if necessary. A carabiner can then be attached directly to the remaining ring. It should be noted that abseil rings have extremely low abrasion. After all, they are constantly rotating, so there is no risk of “grooves” at individual points.

Features Raumer climbing anchor expansion bolt with 2 rings

• EN standard 795 or EN standard 959
• Material: AISI 316L steel
• Breaking loads: 27kN radial and 26kn axial
• expansion bolt: 10mm bore
• Length: approx. 27cm
• Weight: 382 gram
• Rings: 10mm thick and 32mm inner diameter

Observe the instructions for use / installation instructions:

• Type descriptions and installation: Raumer climbing anchor Technical data sheet 1
• Do’s & don’ts and installation tips: Raumer climbing anchor Technical sheet 2

The lower off must be connected “in series”. This means that the two fixed points are only slightly offset horizontally. Vertically, however, they are strongly offset without fully tensioning the chain. Ensure the correct spacing of the expansion bolt of at least 3 x the anchoring depth (tear-out cone expansion bolt!).

Use the appropriate expansion bolt

The Raumer climbing anchor expansion bolt with 2 rings is made of AISI 316L steel. Consequently, for the installation of the stand you must use 10mm expansion bolt of A4 steel (AISI 316 / 316L) must be used to install the stand. This avoids galvanic corrosion at expansion bolt. This occurs when fixing to zinc plated expansion bolt. This must be avoided at all costs.

We recommend the expansion bolt from Fischer Befestigungstechnik: the Fischer heavy-duty anchor FBN II 10/10 A4 or FAZ II bolt anchor A4 steel

Are you more interested in this topic?

Then read the technical article “Steel quality at expansion bolt and glue in bolt”. Or sign up for one of our courses at the bolting.eu Academy.

Observe borehole cleaning

The drilling holes for the Raumer lower off should be cleaned appropriately. expansion bolt are not as sensitive here as glue in bolt. However, they should always be cleaned. Firstly, use a drilling hole blow out pumb to do this. This gets the drilling dust out. Then clean the hole at least once with a hole brush. This also removes the material from the borehole wall. These two simple steps prevent the expansion bolt from “wandering”. Consequently, the bolt hanger of the climbing anchors cannot become loose and twist.

Link tip: to the manufacturer