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(#1952, 2195)

Front View: Closed Rear View: Closed
Front View: Closed Rear View: Closed
Front View: Open for Rigging Rear View: Open for Rigging
Front View: Open for Rigging Rear View: Open for Rigging

Technical Details

I acquired my LACD from at in 2013. I acquired another pair in 2017 as part of Bob Thrun's collection.

The LACD is 190 mm. tall, 89 mm. wide, 27 mm. thick, and weighs 199 g. The shell is a tall irregular shaped stamping made from 4.0 mm. aluminum alloy sheet metal. A 17 mm. wide rope channel is formed in the upper portion of one side and a smaller cam channel lies opposite the first. A hole drilled through both sides of the cam channel accepts a 5.5 mm. rivet. The cam and cam spring are mounted on this rivet. The handle below the cam has a soft plastic hand grip molded into place. The hand grip has a slight ledge to support the index finger, and three finger grooves below. A 15.4 mm. sling attachment hole is punched below the handle opening, and an 10.7 mm. hole is punched above and outside the first. A 17 mm. hole punched through both sides of the rope channel provides an attachment point just above the cam. A punched cam stop lies above the cam, but there is a gap between the cam and the stop, even with no rope in the ascender.

The cam is a stainless steel casting. The cam radius increases from 35 to 54 mm. over an angle of 36°, giving a 34° cam angle. The cam has number of small conical teeth. The teeth are parallel to the top of the cam. The tooth pattern is (2)(2S2.1S1)^3(2.3). where the S stands for a single slot.

A spring-loaded manual safety bar is riveted to the cam. The safety is stamped from 2.5 mm. aluminum alloy. The lower portion is bent outward about 60° to form a thumb tab. The top of the tab has a stamped "knurled" pattern. The spring is a compression spring that fits over a post on the base of the cam and a small tab on the stamped safety. The normal action of the spring holds the safety against the cam. When the cam is opened, the shell interferes with the safety bar, thus preventing opening the cam. If the safety bar is moved away from the cam (opposing the spring), it will clear the shell and the cam will open. At full open the safety can be released and the spring will hold the safety against the back of the shell. This provides a means of locking the cam open.

The front of ascenders are screened with the word "ASCENDER" and an up-pointing arrow enclosing the word "UP. The back of the ascenders are screened with the LACD logo, "EN12481:2006," "B", "ø10-13mm," "100kg," "EN567:1998 ¤ ø10-13mm," FOR ROPE 8≤ø≤13mm," and "CE2008."

The weight ("100kg.") screened on the Handle can easily be
less than the weight of a fully loaded caver.


These are well-made ascenders and perform much like the Petzl Ascension. All sharp edges have been removed. The attachment points are simple yet well-rounded holes in the shell; even so, I would consider their small radius too sharp for directly attaching sling ropes. The lower attachment hole could theoretically have the same safety problems as the one on Clog Version A. The upper rope attachment hole is located very close to the main rope. A carabiner through the upper oval attachment hole will drag on the main line.

This ascender has the same pit lip disadvantage as the Clog and other stamped frame ascenders, and there is no stamped reinforcing help prevent bending.

The rubber handle is comfortable enough for my large hands, but I don't climb by gripping ascenders at their handle. I think it is better to simply grasp the ascender from above and lift the ascender in the traditional manner. The cam is very well made. The safety is surprisingly easy to use with one hand. I expected my thumb to slip off, and that can happen, but not as readily as I expected.

I'm not sure the extra holes are needed at the base - except for the Petzl Pompe, I've never found a real need for a second hole, but some people like them.

The weight ("100kg.") screened on the rear of each ascender can easily be less than the weight of a fully loaded caver. Although I know what this means, American courts may not, so I cannot recommend this ascender for heavier cavers or for expedition caving.

LACD is a German company.