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Hauling Pulleys

In general, I don't collect caving, climbing and rescue pulleys, but I do have a collection of hauling pulleys, i.e., pulleys with built-in cams. These allow the user to reset for the next pull while the cam holds the load. There are two principle uses for hauling pulleys:

  1. General Hauling: There are a number of situations in caving and climbing (especially big-wall climbing) where pulleys are used to haul packs and equipment. High strength is less of a concern than light weight. The Rock Exotica Wall Hauler, Ural-Alp and USHBA Hauler are designed for this purpose. The Kong Block Roll, Petzl Mini-Traxion, and USHBA Hogwauler are primarily for general hauling but are also rated for live loads. The CMI Single Micro Hauler is specifically designed for rescue but might work just as well as a wall hauler. If you don't have any of these handy, you might want to know the Garda Knot.
  2. Rescue Hauling: Strength is more important when human life is supported, although I'd argue that a low failure probability is a more appropriate criteria (the two are related, but not identical). Weight is not as much of a concern, nor is cost. The CMI Uplift, RSI Rescue Hauling Pulley, and SRT Rescuemates fit into this category. The CMI Micro Haulers are light-weight devices specifically designed for rescue.

When using pulleys in mechanical advantage systems, one should ensure that the mechanical advantage gained by the system does not allow one to apply forces that would damage any component of the system, especially a human body. I feel that too little attention is given to this.

In the ID field, I used a green background for pulleys that the manufacturer rated for human life, and red for those that were not so rated.

Gallery

Image ID Device Description Acquired Weight Height Width Thickness Std. volume
CMI Double Micro Hauler 822 CMI Double Micro Hauler Stamped Al frame /w steel cam, 2 Al sheaves, swinging side plates On Rope 1, 2005 243 150 53 61 485
CMI Single Micro Hauler 832
2661
CMI Single Micro Hauler Stamped Al frame /w steel cam, Al sheave, swinging side plate
  • On Rope 1, 2005
  • Bob Thrun Collection, 2017
192 154 53 40 328
CMI Uplift 719
2657
CMI Uplift Extruded Al frame /w steel cam, cam safety & cord, 2 Al sheaves, swinging side plates.
  • John E. Weinel, Inc., 1999
  • Bob Thrun Collection, 2017
1054 257 100 62 1593
Hall 885 Hall Steel, sheave, cam on lower arm lever Kurt Stone, 2008 405 189 86 29 475
heightec-PMI Haul Cam D43A 1601 heightec-PMI Haul Cam D43A Stamped steel frame, plastic sheave, SS eccentric cam On Rope 1, 2008 633 202 84 31 525
Ice Rock 2691 Ice Rock Stamped Al side plates, Al sheave, SS eccentric cam Ice Rock, 2017 163 99 59 34 201
Kong Block Roll, Version A 1765 Kong Block Roll, Version A Stamped Al side plates, Al sheave, plastic safety. Attaches to modular ascender. Specs include ascender. Geoffrey Storey, 2012 512 282 79 34 759
Kong Block Roll, Version B 720 Kong Block Roll, Version B Stamped Al side plates, Al sheave, attaches to Kong Modular ascender. Specs include ascender. Inner Mountain Outfitters, 1999 526 278 79 35 769
Kong Block Roll, Version C 1670 Kong Block Roll, Version C Stamped Al side plates, Al sheave, riveted to modular ascender. Amazon.com, 2010 510 276 79 35 752
Kong Miniblock Futura 1715
2660
Kong Miniblock Futura Milled Al side plates, Al sheave, SS eccentric cam
  • On Rope 1, 2010
  • Bob Thrun Collection, 2017
165 132 48 32 201
Krok Block Stop 1780
1783
Krok Block Stop
(e18.pu-stop)
Stamped steel frame /w pivoting sheave arm, Al sheave
  • Gear4Rocks, 2012
  • Krok (Alex Dniprovskyy & Alex Kostromitinov)
444 176 60 42 441
Krok Promalp Traxion 1779 Krok Promalp Traxion Stamped Al Frame, steel cam /w spring-loaded pin catch, Al sheave, swinging side plate Gear4Rocks, 2012 280 124 56 29 202
Petzl Micro-Traxion 1742 Petzl Micro-Traxion Stamped Al side plates, Al sheave, SS eccentric cam /w hold-open latch Expé-Spelemat, 2012 81 67 53 24 85
Petzl Mini-Traxion 731
2659
Petzl Mini-Traxion Stamped AL side plates, Al sheave, SS exxentric cam /w hold-open catch
  • Inner Mountain Outfitters, 1999
  • Bob Thrun Collection, 2017
173 60 86 34 174
Petzl Pro-Traxion, Version A 758 Petzl Pro-Traxion, Version A Stamped Al side plates, Al sheave, SS eccentric cam Inner Mountain Outfitters, 2001 288 126 66 36 298
Petzl Pro-Traxion, Version B 1822 Petzl Pro-Traxion, Version B Stamped Al side plates, Al sheave, SS eccentric cam, plastic latch & cover On Rope 1, 2014 260 118 70 35 288
Petzl Wall Hauler 1647
2663
Petzl Wall Hauler Stamped Al side plates, Al sheave, suspended stamped Al cam frame /w steel eccentric cam & hold-open pin.
  • Sean Stewart, 2009
  • Bob Thrun Collection, 2017
233 154 66 50 504
Rock Exotica Wall Hauler (Model 302010) 666
2663
Rock Exotica Wall Hauler (Model 302010) Stamped Al side plates, Al sheave, suspended stamped Al cam frame /w steel eccentric cam & hold-open pin.
  • Gendarme, 1991
  • Bob Thrun Collection, 2017
236 153 66 51 515
RSI Rescue Hauling Pulley 691 Rescue Systems Inc. Rescue Hauling Pulley Extruded Al frame /w steel cam, cam safety, opening cable, safety/hold-open pin, 2 Al sheaves, swinging side plates John E. Weinel, Inc., 1995 725 227 78 78 1381
SMC Advance Tech HX 1796 SMC Advance Tech HX Milled central rib, stamped Al side plates, Al sheaves, Al cam, engagement mechanism On Rope 1, 2012 270 129 70 50 447
SRT RM2 Rescuemate 667 SRT RM2 Rescuemate Extruded Al frame /w steel cam, cam safety & cord, Al sheave, swinging side plate. Inner Mountain Outfitters, 1994 695 254 80 40 813
SRT RM22 Rescuemate 668
2658
SRT RM22 Rescuemate Extruded Al frame /w steel cam, cam safety & cord, 2 Al sheaves, swinging side plates.
  • Inner Mountain Outfitters, 1994
  • Bob Thrun Collection, 2017
902 254 80 63 1280
Ural-Alp Big Hauler 34.06 796 Ural-Alp Big Hauler 34.06 Painted side plates, Al sheave, toothed steel eccentric cam Ural Sport, 2004 541 126 132 43 712
Ural-Alp Double-Hauler 797 Ural-Alp Double-Hauler Engine-ruled Ti side plates, 2 sheaves, eccentric cam Ural Sport, 2004 173 104 70 40 288
Ural-Alp Hauler, Version A 644 Ural-Alp Hauler, Version A Stamped Ti side plates, Al sheave, Ti cam, hold-open pin John E. Weinel, Inc., 1994 115 88 67 29 171
Ural-Alp Hauler, Version B 732
2654
Ural-Alp Hauler, Version B Stamped Ti side plates, Brass sheave, Ti cam, hold-open pin
  • USHBA, 2000
  • Bob Thrun Collection, 2017
116 87 67 29 170
USHBA Hauler 733
2621
USHBA Hauler Stamped Ti side plates, Al sheave, Ti cam, hold-open pin
  • USHBA, 2000
  • Bob Thrun Collection, 2017
120 78 74 30 175
USHBA Hogwauler Prototype #2 734 USHBA Hogwauler Prototype #2 Stamped Ti side plates, Al sheave on spring-loaded type-1 locking lever Ti cam, 139 mm. release lever USHBA, 2000 327 133 82 34 376
USHBA Hogwauler, Version A 735
2621
USHBA Hogwauler, Version A
Stamped Ti side plates, Al sheave on spring-loaded type-1 locking lever Ti cam, hold-open pin
  • USHBA, 2000
  • Bob Thrun Collection, 2017
293 165 88 34 494
USHBA Hogwauler, Version B 1654 USHBA Hogwauler, Version B
Stamped Ti side plates, Al sheave on spring-loaded type-1 locking lever Ti cam, hold-open pin Kim Graves, 2009 299 167 87 34 495
Xinda 2704 Xinda Stamped Al side plates, Al sheave, suspended stamped Al cam frame /w steel eccentric cam, hold-open safety on cam Suntek, 2017 398 187 83 40 618

Weight Chart