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.
Prevents material from slipping or grinding when rotating.
Stays out of the way when not in use.
Prevents cylinder damage by aligning cylinder during uneven clamping pressure.
Reduces machine shake by slowing motion at the ends of the cylinder stroke.
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.
Picking and handling objects closer to the machine is easier which improves productivity, reduces repositioning and allows you to work in smaller spaces.
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.
When you need to pick up large, heavy objects, grab bucketful’s of debris or demolish a building, discover a new reality on grip with AMI Attachments’ Graptor® Powered by RAMCAM™. The Graptor® powered by RAMCAM™ works using hydraulic cylinders which are fully enclosed and fully protected from the elements. The built-in rotary thumb gives operators improved flexibility and precision by maintaining constant grip on the load throughout the bucket’s entire rotation – putting out the most torque in the most compact design – making the Graptor® Powered by RAMCAM™ a powerful tool that keeps a tight handle on heavy, bulky loads. Patent Pending.
When multi-tasking is a must, the AMI Attachments Jawbone 4-in-1 Excavator Bucket Powered by RAMCAM™ responds with a multipurpose design that digs, grades, grips and clamshells. The RAMCAM™ technology works using hydraulic cylinders which are fully enclosed and fully protected from the elements. At first glance, the AMI Jawbone Powered by RAMCAM™ looks no different than a regular digging bucket, however enclosed along the back are two hydraulic cylinders. This provides all the power of a hydraulic thumb but without the custom installation. With as much holding power and gripping strength as a thumb, the AMI Jawbone 4-in-1 Excavator Bucket Powered by RAMCAM™ handles logs, rocks and scrap easily. You can also switch between digging and ditching with the ability of two different cutting edges on one bucket. Now you can dig and grade without costing you downtime changing buckets. For swampy material handling, the AMI Jawbone Powered by RAMCAM™ also works as a clamshell bucket for loading and dumping straight down. Patent Pending.
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 Machines | No | Yes | Yes |
Secure Load Through Full Bucket Rotation | Low | High | Medium |
Non-Destructive Digging & Ditching | Yes | No | Yes |
Ideal for Demolition | Medium | High | Low |
Tines | 2, 3 or More | 4 | 0 |
Bucket Edge | N/A | Tooth | Tooth & Smooth |
Provides useful picking and holding capabilitits for dedicated machine applications. Thumb stores tight against stick allowing normal digging/ditching operation without restriction. | No | Low | Yes | Medium | 2, 3 or More | N/A |
Provides strong holding force, efficient and safe demolition with minor digging bucket capabilities. Allows for quick disconnect and sharing between machines. | Yes | High | No | High | 4 | Tooth |
Provides broad versatility when multiple tools are required to complete routine tasks. When switching attachments becomes inefficient or not possible. | Yes | Medium | Yes | Low | 0 | Tooth & Smooth |