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Handled Eccentric Cam Ascenders
Cast Frame

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. The shell/frame below the cam is enlarged to provide a handle. No sling attachment points are provided on the cam.

These ascenders are generally larger and heavier than the handleless eccentric cam ascenders; conversely, they are easier to manipulate, particularly with gloved hands. I don't normally wear gloves ahile ascending (except in cold conditions), but many people prefer to do so.

I split the Handled Eccentric Cam Ascenders into these four groups:

Cast-frame ascenders are subject to cracking if dropped; however, actual failures are rare. The reports of gray Jumar front-strap failures that I've seen were of a different nature: unknowledgable people tying in to a portion of the ascender that was never designed for that purpose. Casting can produce ergonimically superior designs, and many of my caver friends feel that the gray Jumars were the most comfortable ascenders ever made.

In the ID column and chart, I used a red background for cast-frame ascenders, green for milled-frame ascenders, and blue for stamped-frame ascenders. Magenta indicates a two-rope ascender.

Gallery

Image ID Device Description Acquired Weight Height Width Thickness Std. volume Channel Diameter Cam Angle Tooth Pattern
Jumar, Version A 1551 Jumar, Version A LH & RH, cast frame, triangular top & square bottom holes, open-web cam /w straight teeth, metal safety in frame Steve Brandlein, 2011 190 162 76 37 459 14.1 27° (4.5)^6(4.3)^2(4)
Jumar, Version B 1576
2172
Jumar, Version B LH & RH, cast frame, triangular top & square bottom holes, open-web cam /w straight teeth, metal safety in frame
  • Don Harper, 2012
  • Bob Thrun Collection, 2017
209 162 75 36 453 13.0 27° (4.5)^6(4.3)^2(4)
Jumar, Version C 136 Jumar, Version C LH & RH, cast frame, triangular top & square bottom holes, open-web cam /w straight teeth, metal safety in frame NSS Auction, 1999 207 161 76 37 453 14.1 27° (4.5)^5(4.3)^4
Jumar, Version D 2351
2352
Jumar, Version D LH, cast frame, triangular top & square bottom holes, open-web cam /w straight teeth, metal safety in frame
  • Austin Habitat for Humanity, 2017
  • James Haerr, 2017
208 162 76 38 461 14.1 27° (4.5)^5(4.3)^4
Jumar, Version E 236
1506
1549
1550
2001
Jumar, Version E LH & RH, cast frame, triangular top & square bottom holes, open-web cam /w straight teeth, metal safety in frame
  • Karla Green, 2008
  • Simon Cox, 2009
  • Charles Wilkes, 2010
  • Chris Vandiver, 2011
  • Greg Estes, 2015
210 162 76 38 467 14.1 27° (4.5)^5(4.3)^4
Jumar, Version F 36
37
272
Jumar, Version F LH & RH, cast frame, triangular top & square bottom holes, open-web cam /w straight teeth, metal safety in frame
  • Roy Jameson, 1980
  • John Yost, 1993
  • Karl G. Wilcox, 2009
211 161 76 38 467 14.1 27° (4.5)^5(4.3)^4
Jumar, Version G 38
293
1547
1911
2171
2173
2174
Jumar, Version G LH & RH, cast frame, triangular top & square bottom holes, open-web cam /w straight teeth, plastic safety in frame
  • Speleoshoppe, 1976
  • Dean Berkbigler, 2009
  • Alexander Medrano, 2011
  • Stuart Polack, 2012
  • Bob Thrun Collection, 2017
  • Bob Thrun Collection, 2017
  • Bob Thrun Collection, 2017
206 157 74 36 418 14 27° (4.5)^5(4.3)^4
Jumar, Version H 1535 Jumar, Version H LH & RH, cast frame, triangular top & square bottom holes, open-web cam /w straight teeth, plastic safety in frame Craig B. Clark, 2010 203 160 74 36 425 14 27° (4.5)^5(4.3)^4
Jumar, Version I 118 Jumar, Version I RH, cast frame, triangular top & round bottom holes, retention clip, open-web cam /w straight teeth, plastic safety in frame Theresa Williams/Maury Benamy, 1995 213 159 76 32 387 14 27° (4.5)^5(4.3)^4
Jumar 79, Version A 39
297
2067
Jumar 79, Version A LH & RH, cast frame, triangular top & round bottom holes, semi-web cam /w straight teeth, plastic safety /w beak in frame
  • Speleoshoppe, 1979
  • John Friedman, 2009
  • Bob Thrun Collection, 2017
263 179 77 36 498 14.9 27° (4.5)^3(4.3)^3
Jumar 79, Version B 40
3459
Jumar 79, Version B LH & RH, cast frame, triangular top & round bottom holes, semi-web cam /w straight teeth, plastic safety in frame
  • Speleoshoppe, 1979
  • On Rope 1, 2021
273 179 78 37 507 14.9 27° (4.5)^3(4.3)^3
Jumar 79, Version C 41 Jumar 79, Version C RH, cast frame, triangular top & round bottom holes, wear pins, semi-web cam /w straight teeth, plastic safety in frame Walter Marti, 1982 271 179 78 37 507 14.9 27° (4.5)^3(4.3)^3
Jumar 79, Version D 265
270
285
1532
1905
Jumar 79, Version D LH & RH, cast frame, triangular top & square bottom holes, semi-web cam /w straight teeth, plastic safety in frame
  • Charles Denning, 2009
  • J. Matzke, 2009
  • Henderson L. Holman IV, 2009
  • Jeff DeFreest, 2010
272 179 78 37 507 14.7 27° (4.5)^3(4.3)^2(4)
Jumar 79, Version E 42
1908
Jumar 79, Version E LH & RH, cast frame, triangular top & round bottom holes, wear pins, semi-web cam /w straight teeth, plastic safety in frame
  • Walter Marti, 1989
  • Caleb Laurence (Laptop Specialties), 2012
274 179 78 37 507 14.7 27° (4.5)^3(4.3)^2(4)
Jumar, Fritschi 271
2175
2278
Jumar, Fritschi LH & RH, cast frame, triangular top & round bottom holes, semi-web cam /w straight teeth, plastic safety in frame
  • Michel Brinkman, 2009
  • Bob Thrun Collection, 2017
  • Bob Thrun Collection, 2017
272 179 78 36 504 14.6 27° (4.5)^3(4.3)^2(4)
Jumar, WAG 273
2176
Jumar, WAG LH & RH, cast frame, triangular top & round bottom holes, semi-web cam /w straight teeth, plastic safety in frame
  • International Military Sales, 2009
  • Bob Thrun Collection, 2017
278 178 78 36 505 14.7 27° (4.5)^3(4.3)^2(4)
Jumar 79, Modified Version D 1905 Jumar 79, Modified Version D LH & RH, modified cast frame, triangular top & square bottom holes, semi-web cam /w straight teeth, plastic safety in frame Charlotte Phillips 2012 272 179 78 37 507 14.7 27° (4.5)^3(4.3)^2(4)
Odessa (Оде́са) 3422 Odessa (Оде́са) LH, cast Al frame, triangular top & square bottom holes, semi-open web cam /w straight teeth, metal safety in frame Artyom Babin (Артём Бабин), 2021 183 159 72 33 372 14.9 22° (2.1)^5(2)
Roloff, Version A 2305 Roloff, Version A LH & RH, cast frame, round top & bottom holes, semi-open web cam /w straight teeth, metal safety in frame Bill Liebman, 2017 209 176 76 37 490 14.2 26° (4.3)^6
Roloff, Version A 167
2342
Roloff, Version B LH& RH, cast frame, round top & bottom holes, semi-open web cam /w straight teeth, metal safety in frame
  • Allen Padgett, 2003
  • Bill Liebman, 2017
217 176 77 38 516 14.2 26° (4.3)^5
Roloff, Version C 2305 Roloff, Version C LH & RH, cast frame, round top & bottom holes, semi-open web cam /w straight teeth, metal safety in frame Bill Liebman, 2017 209 176 76 37 490 14.2 24° (4.3)^6
Roloff, Version D 2040
2181
Roloff, Version D LH & RH, cast frame, round top & bottom holes, semi-open web cam /w straight teeth, metal safety in frame
  • NSS Auction, 2016
  • Bob Thrun Collection, 2017
237 175 78 39 531 14.2 24° (4.3)^6
Roloff (Modified, Version A) 2179 Roloff
(Modified, Version A)
LH & RH, cast frame, round top & bottom holes, Jumar replacement cam, metal safety in frame Bob Thrun Collection, 2017 253 176 77 38 516 14.2 27° (4.5)^5(4.3)^4
Roloff (Modified, Version B) 48 Roloff
(Modified, Version B)
LH & RH, cast frame, round top & bottom holes, semi-open web cam /w straight teeth, metal safety in frame Darrel Tomer, 1984 208 175 77 39 519 14.6 26° (4.3)^5
Roloff (Modified, Version B) 2392 Roloff
(Modified, Version C)
LH & RH, cast frame, round top & bottom holes, Jumar replacement cam, metal safety in frame Rick Banning, 2019 237 175 78 39 531 14.2 24° 4.5)^5(4.3)^4
Tokyo Top 2000 Tokyo Top LH & RH, cast frame, triangular top & square bottom holes, open cam /w "Z" teeth, metal safety in frame Olivier Peron Caillet, 2015 375 177 92 36 579 14.3 26° (Z)^7
Tsentrolit (Центролит) 3448 Tsentrolit (Центролит) RH, chill cast Al frame, Triangular top hole, semi-open web cam /w "Z" teeth, metal safety in frame Vitaly Tomchyk , 2021 213 171 79 35 473 16.7 23° (2)(4)^12

Handled eccentric Cam Ascender Weight Chart Double Milled Stamped