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Handleless Eccentric Cam Ascenders
Emergency Ascenders

This section includes mechanical ascenders consisting of a shell or frame and an eccentric cam assembly attached to the shell/frame at a single pivot point. The shell/frame is open on one side to allow admittance of the standing rope. No sling attachment points are provided on the cam. No handle is provided.

I split the Handleless Eccentric Cam Ascenders into these three groups:

These ascenders generally sacrifice utility and ease of use for reduced size and weight. Most people reserve these only for emergency use, although they have some other specialized uses.

In the ID column and chart, I use a red background for hand ascenders, green for chest ascenders, and blue for emergency ascenders.

Gallery

Image ID Device Description Acquired Weight Height Width Thickness Std. volume Channel Diameter Cam Angle Tooth Pattern
Beal Tract Up 2374 Beal Tract Up Ambidextrous, stamped Al shell, extruded Al cam, carabiner hole Stacy Williams (climbing-dressage-gear), 2018 89 34 66 31 70 15.5 17° 12 round
Climbing Technology Roll N Lock 1962
1989
Climbing Technology Roll N Lock Ambidextrous, stamped Al shell, cast SS & stamped Al cam, pulley, hold-open catch, carabiner hole
  • Outdoor Supply LLC, 2013
  • Expé-Spelemat, 2014
81 34 69 32 75 17.3 17° (Z)^5
Edelweiss MicroB 3424 Edelweiss MicroB Ambidextrous, stamped Al shell, extruded Al cam, carabiner hole Buffalo Gap Outfitters, 2021 86 34 66 31 70 15.3 13° (ZZ)^3(Z)
Kong Duck 288
1517
2131
Kong Duck LH, Al case, steel cam, swinging front plate, Z teeth, carabiner hole
  • Expé-Spelemat, 2009
  • On Rope 1
  • Bob Thrun Collection, 2017
68 66 31 30 60 15.1 20° (Z)^10
Krok Mini Ascender, Version A 1594 Krok Mini, Version A Ambidextrous, stamped Al shell, toothed cam, carabiner hole Gear4Rocks, 2012 77 35 62 28 61 13.5 21° (2.H.2)^3(2.3.2)
Krok Mini Ascender, Version B 1597 Krok Mini, Version B Ambidextrous, stamped Al shell, toothed cam, carabiner hole Krok (Alex Dniprovsky & Alex Kostromitinov), 2012 79 33 63 28 59 13.5 21° (2.H.2)^3(2.3.2)
Stregor, Version A 183 Stregor, Version A Ambidextrous, stamped Al shell, milled cam, Z teeth, carabiner hole Ural Sport, 2004 77 38 56 29 61  16.5 24° (Z)^10
Stregor, Version B 184 Stregor, Version B Ambidextrous, stamped Ti shell, milled cam, Z teeth, carabiner hole Ural Sport, 2004 77 38 56 26 56  16.5 24° (Z)^10
Ural Alp Mouse 10.21, Version A 180 Ural Alp Mouse 10.21, Version A RH, Ti case, steel cam, swinging front plate, straight teeth, carabiner hole Ural Sport, 2004 93 65 32 35 73  15.2  20° (3.2)^3
Ural Alp Mouse 10.21, Version B 189 Ural Alp Mouse 10.21, Version B RH, Ti case, steel cam, swinging front plate, straight teeth, carabiner hole Ural Sport, 2005 94 65 33 35 74  15.2  20° (3.2)^3
Wild Country Ropeman, Version A 119
121
2133
Wild Country Ropeman, Version A Ambidextrous, stamped SS shell, extruded cam, Z teeth, carabiner hole
  • Exkursion, 1996,
  • John E. Weinel, Inc., 199
  • Bob Thrun Collection, 2017
60 38 53 32 64 16.0 26° (Z)^10
Wild Country Ropeman, Version B 2346 Wild Country Ropeman, Version B Ambidextrous, stamped SS shell, extruded cam, Z teeth, carabiner hole Bill Liebman, 2017 60 38 54 31 64 16.0 26° (Z)^10
Wild Country Ropeman, Version C 2309 Wild Country Ropeman, Version C Ambidextrous, stamped SS shell, extruded cam, Z teeth, carabiner hole Bob Thrun Collection, 2017 60 38 53 32 64 16.0 26° (Z)^10
Wild Country Ropeman II 138
2132
Wild Country Ropeman II Ambidextrous, stamped SS shell, forged toothed SS cam, carabiner hole
  • Mountain Gear, 1999
  • Bob Thrun Collection, 2017
90 38 53 32 64 16.5 23° (3.4)^2, (2.4)^4(2)^2
Wild Country Ropeman Mk. 1F 1935
2134
Wild Country Ropeman Mk. 1F Ambidextrous, forged SS shell, extruded cam, Z teeth, carabiner hole
  • Backcountry Gear, 2012
  • Bob Thrun Collection, 2017
63 54 37 32 63 16.0 23° (Z)^10
Wild Country Ropeman Mk. 2F 1936
2135
Wild Country Ropeman Mk. 2F Ambidextrous, forged SS shell, forged toothed SS cam, carabiner hole
  • Backcountry Gear, 2012
  • Bob Thrun Collection, 2017
92 54 37 32 63 16.0 25° (3.4)^2(2.4)^4(2)^2
Wild Country Ropeman Mk. 3F 1937
2136
Wild Country Ropeman Mk. 3F Ambidextrous, forged SS shell, extruded cam, Z teeth, carabiner hole
  • Backcountry Gear, 2012
  • Bob Thrun Collection, 2017
69 63 30 27 53 15.5 23° (Z)^14

Eccentric Cam Ascender Weight Chart Chest Hand