Excavator thumb cylinder

Excavator thumb cylinder DEFAULT


Select the correct size thumb from the drop down menu above to view the price.

  • Adjustable using Hydraulic Cab Controls 
  • 15 Degree Retraction - 140 Degree Extension
  • Independent Mounting on Stick for Easy Removal
  • Durable formed Steel Base Mounting Bracket 
  • Universal Weld-On Mounting so it can be installed on almost any machine
  • Made in America 


  • Our Thumbs are made from A36 High Strength American Steel. Our larger Thumbs are made with AR400 depending on the operating weight class.
  • The Standard design consists of 2 - 1/2" Thick Steel Tines on our 7" wide model and 5/8" Thick steel on our 10" wide model. Both offer aggressive teeth over the majority of the tine for added traction.
  • 2 Independent Weld-On Mounting Brackets allowing you to adjust the retraction and extension desired during install. Top Mounting 1" "D" Bracket and a 4" Wide Base Mounting Bracket.
  • Dimensions - Selected Length x 7" and 10" Width Available. Additional Width are available upon request.
  • Our Pins are 1" on 7" wide model and 1.25" on 10" wide model. All pins are 4140 Heat Treated Hardened Steel Pins secured by a set of Bolts with a double Nut.
  • Hydraulic Tie Rod Cylinder Rated 2500 PSI 


  • Machine Pre-Plumbed for Hydraulic Thumb
  • Installation of our Mounting Brackets  
  • General Assembly 
  • Must set operating pressure of thumb to 2500 psi

Items Included in Fully Hydraulic Style Thumb:

1 - Thumb Part 

1 - Top Mounting Bracket

1 - Base Mounting Bracket 

1 - Hydraulic Cylinder 

3 - Hardened Pins with 

1 - Hardware Set ( Bolts and Double Nut ) 

 Weld-On Mounting Instruction Included

*Hydraulic Lines and Fittings not included as the Required Length depends on how your machine was plumbed. Fittings are 1/2" NPTF PORTS or SAE8. 


Sours: https://www.miniexcavatorthumbs.com/products/fully-hydraulic-thumbs

hydraulic thumb for excavatorConstruction and demolition contractors use a hydraulic thumb for excavators and backhoes to simplify many heavy lifting and moving tasks.

The hydraulic thumb is a versatile attachment that can easily pick up bulky materials such as big rocks, debris, trees and logs with precision. The hydraulic thumb for backhoes, excavators and mini-excavators are easy to control and open and close with speed and accuracy.

Hydraulic thumbs for excavators provide added flexibility over mechanical models and prove more efficient when using the thumb and bucket frequently. The hydraulic thumb provides greater range of motion often up to 180°. This allows the operator to pick and place objects with increased versatility and load control.

Considerations When Selecting and Mounting Hydraulic Thumbs

There are many considerations when choosing the right hydraulic thumb for excavator applications and when mounting with the most reliable auxiliary hydraulics. Mounting styles affect performance. A hydraulic pin-on thumb, for example, maintains the relationship with the rotation of the bucket and is designed to match the radius of the bucket tip and width.

Some considerations when selecting the right hydraulic thumb include:

  • Tips between the bucket teeth – are they replaceable?
  • Intersecting tips help to pick up fine materials
  • Thumb profile and teeth spacing should suit the application
  • Bushings should also be replaceable
  • Hardened alloy pins
  • Consider the thickness and types of steel used in the thumb manufacture. Should be AR400 or QT100 for abrasion and wear resistance
  • Cylinder geometry should provide strong leverage with a good range of motion
  • Ability to flip the cylinder to change port positions
  • Cylinder pressure ratings and bore stroke
  • Mechanical lock improves safety when parking for extended periods
  • Auxiliary hydraulics which should include a 45° hydraulic adapter to protect all hydraulic hoses from damage along with heavy duty auxiliary quick couplers

Auxiliary Plumbing Solutions for Hydraulic Thumbs

It can be challenging when mounting and plumbing a hydraulic thumb for excavators and mini-excavators. The rotation and flexibility are great for achieving high efficiency and meeting production requirements. This rotation can cause problems, however, if the thumb comes into contact with hydraulic hoses. There is a risk of breaking off the auxiliary hydraulic hoses which creates safety and environmental issues as well as impacting productivity.

There is a better solution than the conventional straight line hose connections, which work great for almost any other excavator attachment. Stucchi partners with demolition contractors and equipment dealers to provide a plumbing solution with a 45° adapter. By using a 45° adapter with our heavy-duty, threaded hydraulic quick couplers you can ensure a safe and efficient application.

Stucchi partners with an equipment dealer who automatically incorporates the 45° adapter with our heavy duty couplers, the VEPHDL, to provide added value to their customers. This prevents the possibility of the excavator thumb snapping hydraulic lines and keeps them out of harm’s way. This innovative hydraulic solution by Stucchi improves productivity and safety while preventing downtime and contamination.

Stucchi is recognized worldwide as a leading provider of hydraulic solutions. We offer a wide selection of hydraulic quick couplers as well as provide custom designed product solutions. Contact Stucchi with any questions on excavator auxiliary hydraulics and the best way to plumb your hydraulic thumb for excavators.

Sours: https://www.stucchiusa.com/blog/hydraulic-thumb-for-excavator-plumbing-solutions/
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Hydraulic Excavator Thumb

Gentec Equipment

Find the best hydraulic excavator thumb for all heavy-duty material handling, excavating and landscaping work, and increase your productivity.

Adding a hydraulic excavator thumb to your excavating machinery remains the easiest and quickest way to get more capability. The thumb makes it simple for your excavating machinery to pick, hold, and move awkward materials like rocks, branches, trunks, concrete, and debris, that wouldn’t fit in your bucket. A hydraulic excavating thumb offers you more constant pressure throughout the whole cylinder range.

Finally, hydraulic excavators thumbs achieve more than 130-degree rotation, which makes it easier to catch and pick up objects closer to the excavating equipment. The majority of Gentec Equipment’s hydraulic excavator thumb models have two to four fingers made of 2”high-strength steel plates, have serrated edges, and are fully gusseted for improved strength.


Why choose Gentec Equipment’s Hydraulic Excavator Thumbs?

Located in Ontario, Canada, Gentec Equipment specializes in the manufacturing, sale, and service of machinery attachment and support equipment for the construction, landscaping, forestry, and mining sectors everywhere in the United States and Canada. We manufacture hydraulic excavator thumbs of various sizes (8” to 32” width and 24” to 72” length). We also carry grapples, skid steer attachments, hydraulics vibratory plate compactors, and rakes made to fit excavating many types of machinery: excavators, backhoe loaders, tractors, and mini-loaders of all brands (John Deere, Caterpillar, CASE, Hitachi Construction Machinery, etc.)

  • All hydraulic excavator thumbs are made in the United States
  • Shipment support for all customers
  • Buy online and get free, fast shipping everywhere in the United States and Canada
  • Ground shipping through common ground carriers (UPS, FEDEX), items delivered in 3-5 business days; large items over 150 lbs shipped by freight line (1 week).
  • Excavating attachment made with high-strength steel
  • Easy to install and to use
  • Durable and compact design resulting in efficient operation
  • Made to improve work efficiency and productivity
  • Competitive prices



Do you have questions about our hydraulic excavator thumbs? Did you have difficulty finding the model you need in our inventory? Don’t hesitate to contact us, and we will be pleased to provide you with all the information you need.

Free shipping is offered on all orders. Orders placed before 12 PM (EST) except Saturday, Sunday, and Holiday, will be shipped the same day.

Gentec Equipment

Sours: https://gentecequipment.com/content/27-hydraulic-excavator-thumb
Mini excavator homemade hydraulic thumb build

Hydraulic Thumb Guide

The easiest and fastest way to get more capability from your excavator is to install a Hydraulic Thumb. With an AMI Attachments Hydraulic Thumb, your excavator goes from digging to complete material handling. A Hydraulic Thumb makes it easier to pick, hold and move awkward material such as rocks, concrete, branches, and debris that does not fit into the bucket. AMI Attachments offer two types of Hydraulic thumbs, the stick pivot and Pro-Link. This guide will help you understand the differences and decide which is right for you.


Rotates On Same Pin As Original Bucket

Prevents material from slipping or grinding when rotating.


Tucks Up Tight Against stick

Stays out of the way when not in use.


Spherical Bushings

Prevents cylinder damage by aligning cylinder during uneven clamping pressure.


Cushioning Cylinder

Reduces machine shake by slowing motion at the ends of the cylinder stroke.

Progressive Link Thumb (pro Link)

Progressive Link Thumb (pro Link)

AMI’s Progressive Link Thumb provides more constant pressure throughout the entire cylinder range. The thumb achieves more than 180 degree rotation which makes it easy to reach and pick up objects that are close to your excavator.

  • Material Handling
  • Site Prep
  • Land Clearing
  • Demolition
  • Forestry
  • Clean Up
  • General Purpose

Works Closely To Machine

Picking and handling objects closer to the machine is easier which improves productivity, reduces repositioning and allows you to work in smaller spaces.

Stick Pivot Thumbs

Stick Pivot Thumbs

The AMI Hydraulic Stick Pivot Thumb provides great functionality to your excavator and backhoe. Stick Pivot means the thumb rotates on the same pivot point as the original bucket pin, not a secondary weld-on pivot point. The hydraulic cylinder is also directly connected to the thumb, covering 65-75% bucket rotation. Since both the thumb and the bucket rotate on the same axis, the thumb tip and bucket teeth maintain constant grip on the load when rotating. Unlike thumbs that use a secondary weld-on pivot point, the AMI Stick Pivot eliminates scraping and slippage and reduces risk of release during rotation.

  • Material Handling
  • Site Prep
  • Land Clearing
  • demolition
  • forestry
  • Clean Up
  • General Purpose

Covers 65 75% Of The Bucket Rotation

Graptor Bucket

Graptor Bucket

Built into the AMI Grapple Bucket is a rotary actuated thumb, allowing full bucket rotation without losing grip of your load.

Jawbone 4 In 1 Excavator Bucket

Jawbone 4 In 1 Excavator Bucket

When multi-tasking is a must, the AMI Attachments Jawbone 4-in-1 Excavator Bucket responds with a multi-purpose design that digs, grades, grips and clamshells.


Excavator Thumb Feature Comparison Chart

Pro Link Thumb Graptor Integrated Thumb Bucket Jawbone
Provides useful picking and holding capabilitits for dedicated machine applications. Thumb stores tight against stick allowing normal digging/ditching operation without restriction. Provides strong holding force, efficient and safe demolition with minor digging bucket capabilities. Allows for quick disconnect and sharing between machines. Provides broad versatility when multiple tools are required to complete routine tasks. When switching attachments becomes inefficient or not possible.
Interchange Between MachinesNoYesYes
Secure Load Through Full Bucket RotationLowHighMedium
Non-Destructive Digging & DitchingYesNoYes
Ideal for DemolitionMediumHighLow
Tines2, 3 or More40
Bucket EdgeN/AToothTooth & Smooth
Provides useful picking and holding capabilitits for dedicated machine applications. Thumb stores tight against stick allowing normal digging/ditching operation without restriction.NoLowYesMedium2, 3 or MoreN/A
Provides strong holding force, efficient and safe demolition with minor digging bucket capabilities. Allows for quick disconnect and sharing between machines.YesHighNoHigh4Tooth
Provides broad versatility when multiple tools are required to complete routine tasks. When switching attachments becomes inefficient or not possible.YesMediumYesLow0Tooth & Smooth

COVID-19 Update: AMI Attachments remains open for business at this time, with modifications in place to help reduce the spread of the virus.


Sours: https://www.amiattachments.com/hydraulic-thumb-guide/

Cylinder excavator thumb

Replacement Hydraulic Thumb Cylinder for Bobcat 331

Replacement Hydraulic Thumb Cylinder for Bobcat 331
  • Replacement Hydraulic Thumb Cylinder for Bobcat 331

If you do not know the part number of your cylinder, please give us a call 888-771-1894 with your machine’s serial number. We will look up the cylinder to make sure you are getting the correct replacement.

Replacement Hydraulic Thumb Cylinder for Bobcat 331 Product Data

Weight35 lbs







Replacement for Bobcat #7199435 cylinder.

Related products

Sours: https://www.hydrauliccylindersinc.com/
DIY Mini Excavator Twist Wrist - Part 5

What Is The Difference Between

Manual & Hydraulic Thumbs?

There are two different types of thumbs available: Manual & Hydraulic. A manual thumb is the more common, as well as less expensive option. The thumb is held in position using a pin & solid arm. The adjustment of the thumb to bucket angle is changed by unpinning the arm & allowing the arm to slide to the desired position, then being re-pinned. A hydraulic thumb requires the machine already be plumbed with auxiliary hydraulic lines & foot pedal or switch to control the thumb. A hydraulic cylinder allows for on the fly adjustment of the thumb's proximity to the bucket.


Our thumbs are built with universal fit design for a variety of brands including John Deere, Caterpillar, Komatsu, Kobelco, Volvo, Hyundai, JCB, Link Belt, Bobcat, Hitachi, Kubota & most others. They are manufactured to Heavy Duty Specs, Weld-On Ready & have Serrated Edges for better gripping. The proximity of the thumb is adjustable by moving the placement of the arm & pin. If the machine is being used to grab materials more often, the operator may choose to have the thumb angled closer in proximity to the bucket for less bucket swing. In the opposite situation where digging is more of a necessity than grabbing, the thumb can be pinned at a larger degree of angle away from the bucket, or even completely pinned against the stick or fully removed if it is not being required during certain dirt digging work. 

There are a few things required when deciding which size of thumb will fit on your trackhoe or backhoe. Thumbs are sized by length of the tines, also known as fingers, & the bracket length. A good estimate of size is based on the weight of your machine, however the most accurate way to choose the correct size of thumb is by measuring your stick width, as well as the distance between the teeth of the bucket to the stick when sitting at a 90 degree angle.

Out of gallery
Sours: https://www.i35equipment.com/thumbs

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