Excavator Thumbs in Southern Alberta
Foothills Equipment carries 9 thumbs for excavators, mini excavators and backhoes, from AMI, FMS, TMG Industrial and Weldco-Beales. We are in Calgary and Lethbridge, serving Southern Alberta, everything south of Red Deer. A thumb closes against the bucket, so the machine can grab and place a log, a rock or a chunk of concrete instead of rolling it along the ground.
9 thumbs across four lines.
Extreme Service Progressive Link Hydraulic Thumb
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Extreme Service Stick Pivot Hydraulic Thumb
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Hydraulic Weld on Thumb
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Inside Extendible Dipper Stick Hydraulic Thumb
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Progressive Link Hydraulic Thumb
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Stick Pivot Hydraulic Thumb
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EX Bucket Clamps (Thumbs)
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Hydraulic Thumb
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TMG Excavator Hydraulic Thumb
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Progressive link, stick pivot, or a clamp.
Progressive link thumbs
The thumb is driven through a linkage, so it stays roughly parallel to the bucket right through the range of motion. That means it grips well at any opening, from a small rock to a full bucket width, and it pulls in tight at the end. This is the one to buy if the machine handles a range of material sizes all day.
Stick pivot thumbs
The thumb pivots off the stick and swings in a simple arc. Simpler, stronger through the middle of the range, and usually less money. It grips best at one part of the arc, which is fine if the material you handle is fairly consistent.
Weld on thumbs
Fixed to the stick, usually on smaller machines. The least cost and the least flexibility.
Bucket clamps
A clamp that closes onto the bucket rather than a thumb on the stick. Different geometry, same idea, and it suits certain demolition and sorting work.
Hydraulic or mechanical
Hydraulic thumbs move under power from the cab, which is what you want if the thumb is in use all day. Mechanical thumbs are set by hand into a fixed position and parked out of the way when not in use. Mechanical costs less and is genuinely enough for occasional work.
A thumb is fitted to the stick, not just bolted to it.
Geometry has to match the bucket
A thumb that does not meet the bucket properly is close to useless. The tips have to close on the same plane so the material is trapped, not squeezed sideways. That is why thumbs are specified against the machine model and often against the bucket, and why the manufacturers publish long model lists rather than a single part number.
Hydraulics
A hydraulic thumb needs an auxiliary circuit with a dedicated function. If the machine already runs a breaker circuit, that is often the starting point, but it is a conversation with your advisor before the tool is ordered.
Mounting and welding
Many thumbs mount to brackets that get welded to the stick, which is shop work and has to be done properly. Our shops in Calgary and Lethbridge do heavy equipment repair every day, so this is normal work rather than something we send out.
Coupler machines need a plan
If the machine runs a quick coupler, the thumb still has to meet the bucket after the coupler adds its own length. Tell us the coupler and it gets accounted for.
Machine weight class
The published ranges across what we carry run from small compacts up to large excavators, and AMI publishes model specific fitment across a very long list. Give us the make, model and year and it gets confirmed rather than guessed.
Questions we get asked
What is the difference between a progressive link and a stick pivot thumb?
A progressive link thumb uses a linkage that keeps it facing the bucket through the whole range, so it grips well whether the opening is small or wide. A stick pivot thumb swings on a simple arc and grips best through the middle of that arc. If you handle everything from rocks to full logs, take the progressive link. If your material is consistent, stick pivot is stronger for the money.
Do I need hydraulics to run a thumb?
For a hydraulic thumb, yes, an auxiliary circuit with its own function. A mechanical thumb needs none: the operator sets it by hand and parks it out of the way when it is not wanted. Plenty of machines get by on a mechanical thumb if the work is occasional.
Will a thumb fit my excavator?
Almost certainly, but it has to be matched to the machine and to the bucket so the tips meet properly. Tell us the make, model and year and whether there is a coupler on it, and an advisor confirms the right thumb rather than guessing.
Can you install it?
Yes. Thumb brackets usually get welded to the stick and that is shop work. Our Calgary and Lethbridge shops repair heavy equipment every day, so fitting a thumb is routine here.
Do you sell thumbs for machines you did not supply?
Yes. Most thumbs we sell go on other manufacturers machines.
Send the machine, the bucket and the coupler.
That is everything an advisor needs to work out which thumb meets your bucket properly and what the machine needs to run it.