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Esco Versatile Thumb Products

November 25th, 2008

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Company: ESCO Corporation

Bucket Thumb Attachments The ESCO line of thumb products complements ESCO buckets and provides more versatility. The ESCO thumb package offers a choice of products to handle all material retention needs and makes any excavator more productive.

Universal Rigid Thumb

ESCO offers two Universal Rigid Thumb designs to better match any application. There is the NT Series Universal Rigid Thumb and the RC Series Universal Rigid Thumb. Universal style mounting allows installation on 10-40 ton excavators and is an economic option to hydraulic versions. Review the features and benefits of each below to make the best rigid thumb selection.

NT Rigid Thumb Benefits

The integrated design allows the thumb to be stored
as one unit
Three working positions provide more versatility
Three tines with center tine recessed to cradle objects for a better grip
High grade T1 steel is used in critical components for increased strength and durability to make thumb stronger and last longer
Larger serrated teeth than the competition provides more gripping action
Independent thumb does not interfere with bucket lugs or quick coupler, for fast attachment changes
Thumb adjustment requires only moving a single pin, keeping down time to a minimum
Increased rotation to 115°

RC Rigid Thumb Benefits

With all the superior features of the NT series, the RC series thumb offers these additional benefits:

Four tines to mesh with teeth on ESCO buckets with five tooth positions
Increased material thickness for added strength and durability
Three working positions allows movement ranges of 68°, 86° and 112°
Staggered serrated teeth to provide a continuous bite across the thumb

Hydraulic Thumbs

Universal Hydraulic (UH) an economical option to a standard hydraulic thumb and with lower lead time

Non-Linkage Style the hydraulic cylinder is pinned directly to the thumb with thumb rotation of approximately 120°

Non-Linkage Style for Couplers thumb provides consistent 120° rotation with coupler

Linkage Style the progressive linkage between the cylinder and thumb gives the ESCO hydraulic thumb more complete rotation, up to 180°

Linkage Style for Couplers the progressive linkage between the cylinder and the thumb provides 180° rotation and is designed for use with a coupler

Heavy gussets and reinforcements make the thumb stronger and longer lasting

Serrated teeth with webbing for more gripping action

Large diameter hardened pins and bushings not only provide more life, but also allow easy thumb rebuild

Thumbs are engineered for individual buckets (except UH thumbs), so there™s no interference

Heavy-duty thumb stop also protects cylinder from damage

Cylinders utilize heavy-duty rods and are cushioned at both ends for longer lasting problem-free cylinders

Thumbs retract close to boom when not in use to allow digging visibility

Most non-linkage hydraulic thumbs can be upgraded to full-linkage to offer more product flexibility

High-grade T1 steel is used in critical components to increase service life and provide greater strength

Hydraulic Thumb Kits
Bi-directional Hydraulic Kits for Thumbs

Heavy wall (.20″) tubing with welded JIC fittings, 3/4″ I.D.
Extra heavy-duty cast clamp assemblies grip tubes securely for demanding applications no rubber bushings to loosen and wear out
Premium quality hoses with guards as required
High pressure shut off
Either joy stick or foot pedal controls
Kits include all mounting hardware, brackets, tubes, hoses and various controls
Complete documentation for installation and parts list
Full technical support available