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Climbing Technology

Chest Evo Roll N Lock Simple
Evo Roll N Lock Simple

Overview


Evo
(#2003, 2009)

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 one Climbing Technology Chest Ascender Evo from Knot & Rope Supply/Amazon.com and another from Expé-Spelemat, both in 2015.

Like most chest ascenders, the Evo is left-handed. This ascender is 107 mm. tall, 77 mm. wide, 37 mm. thick, and weighs 145 g.

The ascender shell is subtriangular gray anodized shape bent from 3.9 mm. aluminum sheet. The rope channel is formed by bending the right side of the ascender into a U. The rope channel is 15 mm. in diameter. The main sling attachment point is located below the cam and behind the rope channel. A second attachment point is located above the cam, also behind the rope channel. The shell is bent backwards at both points to provide clearance between the attachment slings and the main rope. This accounts for the rather large thickness of this ascender. The lower attachment point is an oval-shaped opening that measures 19.3 mm. high by 21.2 mm. wide. The upper is shaped like a rectangle with semicircular ends; it is 14.5 mm. high by 24.8 mm. wide. The left side of the shell is bent on an inclined axis to form another U. A hole drilled through both sides of the U accepts a semi-tubular rivet. The cam and cam spring are mounted on this rivet. The head of the rivet is on the front while the roll sits into a stamped depression on the back of the shell. The pivot is centered 48 mm. from the inside of the rope groove. There is a stamped cam stop near the cam pivot, but the stop does not contact the cam.

The cam is a plated skeletonized steel casting. The cam radius, measured from the pivot, increases from 38 to 57 mm. over an angle of 40°, giving a 31° cam angle. The cam has number of small conical teeth, all of which have their axes approximately parallel to the lower surface of the cam. The tooth pattern is (3.2.4)(1H1.2)^3(1.2.2). The H stands for a 4 mm. wide, 6 mm. wide inverted subtriangular hole. A spring-loaded manual safety is mounted mounted on an axle riveted to the center of the cam. The normal action of the spring holds the safety against the cam. The safety has a small, slanted D-shaped finger opening and a safety tab. When the cam is opened, the shell interferes with the safety tab, thus preventing opening the cam. If the safety is moved away from the cam (opposing the spring), the tab will clear the shell and the cam will open. At full open the safety can be released and the spring will hold the a long arm (with dog-leg bends) against the back of the shell, locking the cam open.

The front is printed with the CT logo, "climbing technology," "Made in Italy," "Patented," an illustration of the ascender on rope, and an up-pointing arrow. The rear is printed with the CT logo, the UIAA logo, "climbing technology," "CE0333," "CHEST ASCENDER VO." "EN 12841:2006-B," "Rope¤ 10≤Ø≤13 mm|100 kg," "EN 567:2013," "Rope 8≤Ø≤13 mm," "0053-47 - 15," "0214," and a book-with-an-"i" icon. The cam has "L2" in raised characters.

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

Comments

Climbing Technology made the Advanced Base Camp and Repetto Cirano, and the ones in my collection are earlier versions of the Chest Ascender Evo.

The Evo is well-made. The finish is textured, so the cam opens with a gritty feel instead of with the smooth opening characteristics that the Advanced Base Camp Versions A and B have.

I find that my fingers tend to slip off the safety. The end of the safety that locks the cam open is long, making the lock-open secure and greatly reducing the risk of the ascender coming off rope unintentionally, but also making it more difficult to engage or release.

The holes in the cam are intended to reduce the risk of ascender slippage due to mud-caked cam teeth. The design appears superior to some, but most ropes muddy enough to stop other ascenders will stop the this one as well.

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. Having said that, I'll also say that this is my chosen Frog chest ascender, in part because it functions so well, and in part because I have two of them.

 


Roll N Lock
(#1962, 1989)

Front View: Closed Rear View: Closed Rear View: Closed
Front View: Closed Rear View: Closed Top View
 
Front View: Open for Rigging Rear View: Open for Rigging Rear View: Closed
Front View: Open for Rigging, Cam Locked Front View: Alternate Open Cam locked open

Technical Details

I acquired two Climbing Technology Roll N Lock ascenders from Outdoor Supply LLC in 2013 and a third from Expé-Spelemat in 2014.

The Climbing Technology Roll N Lock is 34 mm. tall, 69 mm. wide, 32 mm. thick, and weighs 81 g. The body of the Duck consists of an aluminum alloy spool crimped to a 3 mm. aluminum alloy plate. The spool's outer diameter is 24.8 mm., and a shallow U-shaped groove reduces the diameter to 23.9 mm. where the rope rides. The inside of the spool is 18.1 mm. in diameter.

The cam axle is riveted to the back plate, with a steel washer under the riveted head protecting the aluminum plate. The cam axle is about 6 mm. in diameter (I would have to destroy the ascender to get an accurate measurement).

The front plate is made from 3 mm. aluminum alloy. A 22.3 mm. hole lines up with the spool and back plate holes. When closed, the plate sits in a depression in the spool. The cam axle has a spring outside the front plate that acts as a spring to force the plate toward the back plate.

The cam is spring loaded, but the spring is not visible. A small roll pin pressed into the back plate probably forms a bearing surface for one end of the cam spring. The cam has five z-shaped teeth. The cam radius increases from 21 to 25 mm. over an angle of 30°, giving a 17° cam angle.

The center of the cam, behind the face, is cut away to allow mounting a pulley on the cam axle. The pulley is 11.7 mm. wide and has a 24.6 mm. major diameter. It has a U-shaped groove to create a central minor diameter of 23.4 mm. The cam also has an internal spring-loaded latch that extends through holes in the side of the cam to create finger tabs outside the front and back plates. This catch can be lifted over a small pin pressed into the back plate. In this position, it holds the cam open and the ascender can he used as a free-running pulley. With the catch disengaged, the cam acts like the cam in a typical hauling pulley.

The front plate is screened with "ROLLNLOCK," the Climbing Technology logo, "UIAA," "0112," and "climbing technology. It is stamped with an arrow labeled "OPEN," a weight icon, "4kN," an arrow , a hand holding a rope icon, and Rope ø8÷13mm. The inside of the rear plate is stamped with a rigging diagram. The outside of the rear plate is stamped with "Made in Italy," "EN567," "EN12278," a book-with-an-"i" icon, a rigging diagram, and "CE0333."

Comments

The Roll N Lock is nicely made. It is a small, lightweight ascender that doubles as a pulley or hauling pulley. One cannot expect a combination device to perform as well as dedicated devices, but this one does a fair job in all respects. It might be a useful addition where one does not expect to need anything, but elects to carry one or two of these for contingencies.


Simple
(#2002, 2013)

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 one Climbing Technology Simple from Knot & Rope Supply/Amazon.com and another from Expé-Spelemat, both in 2015.

The Simple is right-handed. This ascender is 110 mm. tall, 75 mm. wide, 28 mm. thick, and weighs 154 g.

The ascender shell is subtriangular red anodized shape bent from 3.9 mm. aluminum sheet. The rope channel is formed by bending the left side of the ascender into a U. The rope channel is 15.9 mm. in diameter. The main sling attachment point is a 19 mm. circular hole located below the cam and to the right of the rope channel. There is an upper attachment point above the cam, passing through both sides of the rope channel. The upper opening is pear shaped, 18.7 mm. high by 15.8 mm. wide. The right side of the shell is bent on an inclined axis to form another U. A hole drilled through both sides of the U accepts a semi-tubular rivet. The cam and cam spring are mounted on this rivet. The head of the rivet is on the front while the roll sits into a stamped depression on the back of the shell. The pivot is centered 49 mm. from the inside of the rope groove. There is a stamped cam stop near the cam pivot.

The cam is a plated skeletonized steel casting. The cam radius, measured from the pivot, increases from 38 to 57 mm. over an angle of 40°, giving a 31° cam angle. The cam has number of small conical teeth, all of which have their axes approximately parallel to the lower surface of the cam. The tooth pattern is (3.2.4)(1H1.2)^3(1.2.2). The H stands for a 4 mm. wide, 6 mm. wide inverted subtriangular hole. A spring-loaded manual safety is mounted mounted on an axle riveted to the center of the cam. The normal action of the spring holds the safety against the cam. The safety has two pins mounted on it: a 12 mm. tall, 10 mm. diameter knurled pin for the fingers and and a smaller 7 mm. tall, 8 mm. diameter pin that contacts the side of the shell rope channel when the cam is closed. The end of the safety is bent over to form a tab. When the cam is opened, the shell interferes with the safety tab, thus preventing opening the cam. At full open the safety can be released and the spring will hold the tab against the back of the shell, locking the cam open.

The front is printed with the CT logo, "climbing technology," "Made in Italy," "Patented," an up-pointing arrow, and an illustration of the ascender on rope. The rear is printed with "0089 - 61 - 15," a book-with-an-"i" icon, "0314," the UIAA logo, the CT logo, "climbing technology," "ASCENDER SIMPLE," "EN 12841:2006-B," "Rope ¤ 10≤Ø≤13 mm," "100 kg," "EN 567:2013," "Rope 8≤Ø≤13 mm," and "CE0333." The cam has "L2" in raised characters.

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

Comments

The small pin on the cam safety performs an interesting function: pushing down on the larger pin causes the safety tab to lever the cam open, but not enough to let the rope free. This provides an alternate way to "thumb" the ascender. The cam drags on the back of the shell when using this method.

This Simple is essentially the same as the Repetto Stalin (also made by Climbing Technology) that I acquired in 2008, with minor differences such as the knurled pin on the safety.

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.