Harken Ninja Foot Ascender

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Harken Ninja Foot Ascender

Part No. IN400

Maximum line Ø (mm) 13 mm

Maximum rated load (kN) 1.5 kN

Minimum line Ø (mm) 8 mm

The Harken Industrial Ninja foot ascender makes an arborist’s job easier because it reduces rope drag to the lowest of any available foot ascender. This means that there are smoother and easier first steps because you don’t have to counterweight the rope or reach down to pull the rope through the unit – resulting in increased productivity. The entry fairlead maintains correct rope alignment. Unlike every other foot ascender on the market, Harken Industrial’s dual cam system, based on Harken’s marine Cam-Matic ball bearing cleats, applies pressure to both sides of rope simultaneously. This provides more thorough holding power and even force than competitive designs whose cams act on just one side of the rope against a fixed wall on the other side. Other foot ascenders use an aggressive barbed single cam that can create additional drag on the line or damage the rope cover. The Ninja Ascender uses a transverse ribbed cam instead of barbs and the dual cam design prevents accidental kick-outs. It is also the first foot ascender that can work on either foot, and has fully adjustable straps.


Width (mm) 83 mm
Width (in) 3.3 in
Weight (g) 178 g
Weight (lb) 6.3 lb
Maximum line Ø (mm) 13 mm
Maximum line Ø (in) 1/2 in
Maximum rated load (kN) 1.5 kN
Maximum rated load (lb) 330 lb
Material Aluminum
Height (mm) 74 mm
Height (in) 2.9 in
Minimum line Ø (mm) 8 mm
Minimum line Ø (in) 5/16 in
Cam material Stainless steel


ManualNinja Foot Ascender1.88 MB



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