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Arborist Models

Gibbs Ascender Model #3B

Gibbs Ascender Model #3SB

Gibbs Ascender Model #3SB

  • 7/16" to 1/2" (11mm to 13mm) Rope
  • Spring Loaded or Free Running Forged Cam
  • 3/16" Aluminum Shell
  • Breaking Strength 5400 lbs 


The #3B Ascender is intended for flip lines and load hauling, where extra strength is required. Not for self belay by solo climbers.

Assembly: Remove lock nut and pull bolt out until cam swings free. Place ascender on rope and align holes in cam and shell. Re-thread nylok nut and tighten. Do not compress shell.

Convert to Free Running Mode: Remove the small screw in the spring cover. The spring will rotate freely.

Reconvert to Spring Loading: Hold cam down and re-insert screw in spring cover. 

Gibbs Ascender Model #3SB

Gibbs Ascender Model #3SB

Gibbs Ascender Model #3SB

  • 7/16" to 1/2" (11mm to 13mm) Rope
  • Spring Loaded or Free Running Forged Cam
  • Stainless Steel Shell
  • Breaking Strength 5400 lbs 


The #3SB Ascender is intended for flip lines and load hauling, where extra strength is required. Not for self belay by solo climbers.

Assembly: Remove lock nut and pull bolt out until cam swings free. Place ascender on rope and align holes in cam and shell. Re-thread nylok nut and tighten. Do not compress shell.

Convert to Free Running Mode: Remove the small screw in the spring cover. The spring will rotate freely.

Reconvert to Spring Loading: Hold cam down and re-insert screw in spring cover. 

Gibbs Ascender Model #4

Gibbs Ascender Model #3SB

Gibbs Ascender Model #4S

  • 5/8" to 3/4" (14mm to 19mm) Rope
  • Spring Loaded Forged Cam
  • 3/16" Aluminum Shell
  • Breaking Strength 5650 lbs 



The #4 Ascender is intended for litter raising and load hauling, where extra strength is required. Not for self belay by solo climbers.

Assembly: Depress button on pin and pull pin out until cam swings free. Place Ascender on rope and align holes in cam and shell. Depress button and insert pin. 

Gibbs Ascender Model #4S

Gibbs Ascender Model KLIMAIR

Gibbs Ascender Model #4S

  • 5/8" to 3/4" (14mm to 19mm) Rope
  • Spring Loaded Cam
  • Stainless Steel Shell
  • Breaking Strength 5650 lbs 


The #4S Ascender is intended for litter raising and load hauling, where extra strength and durability is required. Not for self belay by solo climbers.

Assembly: Depress button on pin and pull pin out until cam swings free. Place Ascender on rope and align holes in cam and shell. Depress button and insert pin. 

Gibbs Ascender Model #4SB

Gibbs Ascender Model KLIMAIR

Gibbs Ascender Model KLIMAIR

  • 5/8" to 3/4" (14mm to 19mm) Rope
  • Spring Loaded Cam
  • Stainless Steel Shell
  • Breaking Strength 5650 lbs 


The #4SB Ascender is intended for flip lines and load hauling, where extra strength and durability is required. Not for self belay by solo climbers.

Assembly: Remove lock nut and pull bolt out until cam swings free. Place ascender on rope and align holes in cam and shell. Re-thread nylok nut and tighten. Do not compress shell. 

Gibbs Ascender Model KLIMAIR

Gibbs Ascender Model KLIMAIR

Gibbs Ascender Model KLIMAIR

  • 1/2" Lanyards and Flip Lines
  • Bi-Directional
  • .160 Aluminum Shell
  • Stainless Steel Swiveling Eye 
  • Clevis Pin and Split Ring


The KLIMAIR (Climb-Air) is for use in 2-in-1 lanyards. It can also be used for ascending and rigging applications. Not for self belay by solo climbers.

Assembly: Remove split ring and pull out clevis pin. Remove cam. Place shell on rope and align holes in cam and shell. Replace clevis pin and split ring. 

Gibbs Ascender Model KLIMAIR B

Gibbs Ascender Model KLIMAIR B

Gibbs Ascender Model KLIMAIR B

  • 1/2" Lanyards and Flip Lines
  • Bi-Directional
  • .160 Aluminum Shell
  • Stainless Steel Swiveling Eye 
  • Bolt with Nyloc Nut


The KLIMAIR (Climb-Air) is for use in 2-in-1 lanyards. It can also be used for ascending and rigging applications. Not for self belay by solo climbers.

Assembly: Remove Nyloc nut with " Allen Wrench and "" Wrench. Remove cam. Place shell on rope and align holes in cam and shell. Replace bolt and Nyloc nut

About Gibbs Ascenders

  • Gibbs Ascenders are designed not to slip. 
  • They hold well on iced and muddy ropes. 
  • Their simple, durable construction makes them almost fool proof. 
  • They are easy to assemble on the rope yet will not come off unexpectedly. 
  • They can be rigged in all the standard methods for mechanical prussiks. 

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