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Specialty Arborist Pulleys

WesSpur specialty pulleys for progress-capture in mechanical advantage, speed and zip-lines, pulleys with built-in swivels, knot-passing pulleys, and more. Here you will find innovative pulleys with unique features.

SMC Advance Tech HX Pulley


Double pulley with integrated cam that provides immediate progress capture without the need of prusik loops. Stainless pins retain the rope when a rigged system is packed so that system can be pulled out and used immediately. Manufactured from high quality aluminum and anodized to help prevent corrosion. Ideal for all rescue applications where a small mechanical advantage system is being utilized. Up to 1/2” capacity. 34kN / 7,650lb breaking strength (18 kN / 4,050 lb for the becket).

Check out our full Advance Tech Mechanical Advantage Kit.

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SMC Advance Tech Mate Pulley

SMC Advance Tech Mate Pulley


The perfect “mate” for the SMC Advance Tech pulley in mechanical advantage systems. This compact pulley features integrated stainless steel pins to retain the rope when a rigged mechanical advantage system is stored, so that you can immediately deploy and use the system. The Advance Tech mate is made from anodized aluminum with a ball bearing axle and 1.5” aluminum sheave. SMC has machined this pulley to be a perfect component in your mechanical advantage system, with sealed ball bearings, sleek and low-profile design. Works with ropes up to 1/2” (12.5mm).

Find the Advance Tech Mate in our Advance Tech Mechanical Advantage Kit.

Petzl Micro Traxion


The smallest in the Traxion line of progress-capture pulleys, the Micro Traxion is a super-compact and highly efficient (91%) pulley with great applications in tree climbing. As with the other Traxion series pulleys, the Micro Traxion can be used to create a haul system, but the most exciting use for tree climbers is using the Micro Traxion as a backup above an ascent device like the Petzl Zig Zag during SRT ascent. The Micro Traxion can also be used as a compact emergency ascender.

Max Rope Size: 7/16” (11mm) WLL: 1,125 lb (5 KN) Break Strength: 3,375 lb (15 kN) Weight: 3 oz (85g)

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Petzl Pro Traxion


For effective and comfortable hauling of heavy loads with built-in progress capture features. These pulleys are really 3 devices in 1: pulley, self-jamming pulley, and rope clamp/grab. Can be used to haul a load, raise a person, set up a hauling system or self belay. Also work well for Tyrolean traverses and ascending, and are an indispensable device for any rescue kit. The Pro Traxion has safe working load of 6kN(1,350 lb.) as a pulley and 4kN(900 lb.) as a self-jamming pulley. Lower becket , large diameter sheave mounted on sealed ball bearings, chrome plated steel cam, swinging side plates, 1/2” capacity.

Rock Exotica Hydra Swivel Pulley


Rock Exotica's new triple-attachment swivel pulley combines swivel, rigging plate, and pulley into one great tool. The Hydra can be used on your rope bridge for a sliding connection point which also eliminates rope twisting, or even as a lanyard adjuster or to tend your friction hitch (though the swivel won't come into play in that setup). We're sure you'll find many other uses for this great new pulley.

The Hydra can be loaded at any of the three rubber-lined carabiner holes on the swivel top, and has a maximum rope diameter of 1/2” (13mm), breaking strength of 28kN (6294 lb), and a WLL of (5kN 1124 lb).

Omni-Block 1.1”


The Omni-Block 1.1" is a super-compact version of the popular swivel pulley from Rock Exotica. The Omni-Block 1.1” weighs in at only 5.1 oz vs the 9.2 oz of for the Omni-Block 1.5", and is a tight 4.4” x 2"”. It features the same swinging, locking side plate and top-quality swivel. Even with its small size, the Omni-Block 1.1” can handle 1/2” (13mm) climbing lines on it's 1.1” sheave. Omni Specsheet (.pdf file).

WLL: 1,125 lb (5 kN). Breaking Strength: 5,175 lb (23 kN).

Omni-Block 1.5” Swivel Pulley


The Omni-Block pulley has a built in swivel to help ensure that the rope fairleads in and out of the block so that all pulling force is placed squarely onto the sheave. This helps to preserve the breaking strength of the system and to prevent the rope from abrasion with the cheek plates. Ideally suited for use as a false crotch with a climbing line, the Omni-Block will help to prevent the rope from getting twisted. 1/2” capacity. Omni Specsheet (.pdf file).

WLL 810 lb. Breaking Strength 8,100 lb.

Omni-Block 1.5” Double Sheave Swivel Pulley


This double block is ideal for creating mechanical advantage when lifting branches, pulling trees against the lean, or pre-tensioning a rigging line. Built in swivel to help ensure that the rope fairleads in and out of the block so that all pulling force is placed squarely onto the sheave. 1/2” capacity. Omni Specsheet (.pdf file).

WLL 810 lb. Breaking Strength 8,100 lb.

Omni-Block 2.0"


This new version of the Omni-Block from Rock Exotica is upgraded with a larger, 2” sheave for maintaining a larger bend radius in your line. Omni Specsheet (.pdf file).

WLL 810 lb, Breaking Strength 8,100 lb.

Omni-Block 2.0” Double Pulley


If you're familiar with the Rock Exotica Omni-Block pulleys, you know that the 2.0" Double will take its place as the largest double in the Omni family. In addition to hallmark Omni features like an integrated swivel, and push-button access to the sideplates, the 2.0" features a prussic-minding sideplate and working load limit (WLL) of 10kN (based on a 4-1 ratio). The full specs for the 2.0" Double are available by downloading the Omni Specsheet (.pdf file).

MBS 40 kN, WLL 10 kN, max rope capacity 1/2", weighs 20.9oz.

Omni-Block 2.6”


The Rock Exotica Omni-Block 2.6" is a real beast, combinging all the performance features that have made the Omni popular with a larger sheave, wider cheek plates, and a impressive 80kN breaking (20kN WLL)! The Omni-Block 2.6" will turn freely on the steel axle, keeping rigging ropes aligned and running smoothly. The wider cheek plates on this largest Omni offer additional protection for your lines. Like all Omnis, it is easy to attach mid-line thanks to the swinging sideplates with push-botton catch. This Omni can be spliced direclty on to a Loopie sling by request. Omni Specsheet (.pdf file).

WLL 4,446 lb (20kN). MBS 17,984 lb (80kN). Weighs 1.9 lb (850 g).

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Omni-Block 4.5” Material Handling Pulley


As the largest pulley in the Omni family, the new Material Handling Pulley (MHP58) features a large 4.5" sheave and 6,000 lbf WLL. It is also the first Omni-Block to accept up to 3/4" lines, and is designed for overhead lifting. The integrated swivel allows the block to orient while reducing gain during lifting and rigging applications. The rope can be installed and removed with one hand, all while remaining connected to the anchor. The MHP58 is fully ASME B30 compliant.

Precision-manufactured in the U.S.A. by Rock Exotica.

Buckingham OX BLOCK

PUL218 Special Order Item

The Buckingham OX BLOCK is a rope snatch block with an integrated friction bar used for lowering loads, snubbing loads, and raising loads. It allows the rigging professional to handle loads with greater control. When lowering loads, tension is transferred from the worker to the OX BLOCK. The OX BLOCK replaces standard handline blocks, parted blocks, and various snatch blocks. The OX BLOCK also has greater Working Load Limits than blocks of similar size.

Naiad Pro Pulley by CAMP

Naiad Pro Pulley by CAMP


This high-strength, multifunctional pulley is excellent for mechanical advantage, complex operations, and for use as a carriage in slidelining. The Naiad has a large wheel, main attachment hole that accommodates three carabiners, two secondary holes on the sides, and a large becket. This pulley has prusik-minding edges on both sides. Sealed ball bearings for high efficiency and intensive use at high speed. Aluminum alloy body and wheel, stainless steel axle.

Rope capacity 16mm (5/8”), 97% Efficiency, Max Breaking Load 46 kN (10,340 lb), Working Load Limit 10 kN (2,248 lb), Weighs 300 g (10.58 oz).

SMC Shuttle - Rope

SMC Shuttle - Rope


The Shuttle Rope is designed for service in Tyrolean's, modest length ziplines or other mountaineering and rescue applications. Ideal for everyone who wants to put up a zipline in their backyard, mountaineering, and other rope access or rescue environments where a light weight, strong and reliable tandem pulley is ideally suited. For use only on rope. Features 4 independent ball bearings, high quality light weight aluminum sheaves, stainless steel fasteners and multiple connection points. Made in the U.S.A.

5,845 lb breaking strength, 1/2” capacity, 4.25” long x 3.21” high, weighs 8oz.

SMC Shuttle - Xtreme

SMC Shuttle - Xtreme


The Shuttle Cable Xtreme is considered the top dog in the SMC tandem series line. Designed for extreme or continuous service in permanently rigged challenge courses, commercial ziplines and eco-tourism applications. Ideal in high-use environment where users push their gear to the limit. Focusing on the commercial operator by giving them the ability to replace bearings and extending the overall useful life of this extraordinary pulley. The Shuttle Xtreme is light weight, strong and reliable, along with user replaceable sealed ball bearings and long wear alloy sheaves makes this the ideal tandem pulley for the professional user. Maximum speed rating is 20 meters per second.

5,845 lb breaking strength, 1/2” capacity, 4.25” long x 3.21” high, weighs 8oz.

SMC Kootenay HX Knot-passing Pulley

SMC Kootenay HX Knot-passing Pulley

pul906 Special order item

Lightest KPP on the market that is UL-Certified to NFPA General Use. The primary carabiner hole accepts numerous rescue carabiners. Secondary carabiner holes are provided for use with tax or belay lines. Two quick-release pins may be used to "lock off" the sheave when a high-strength tie-off is required. Adding to its versatility, the Kootenay HX may also serve as an edge roller.

8,542 lb breaking strength, 8.67” tall by 4.34” wide, 3.45” sheave, weighs 26.4oz.

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