Pin-On Stiff-Arm Thumb

ACS Pin-On Stiff-Arm Thumbs are custom designed and manufactured to work with your ACS bucket so that they integrate seamlessly with the bucket’s geometry, lace with the bucket’s teeth, and give the operator the widest range of motion possible in all job applications.

The rigid-link connection between thumb body & stick is manually adjustable to three different working angles with a fourth position for stowing out of the way when not in use. No hydraulics are required for this thumb. Field Upgrade Kit to add a hydraulic actuation to your thumb is available.

ACS Thumbs are available with either serrated or smooth teeth.  Thumb teeth crafted from tough, long lasting AR400 material ensuring even wear throughout the life of your attachment.

Important Notes

For the best customer satisfaction, lowest installation cost and maximum productivity ACS; Pin-on thumbs are designed specifically for use with ACS Buckets.

Adding a Coupler:  ACS will vary the thumb length according to whether or not you plan to use the thumb on a coupler-equipped machine.  A thumb on a coupler-equipped excavator needs to be longer in order to interlace correctly with the bucket teeth.

Tech Specs

Thumb Size Table
Excavator Size Bucket Width
Inches
Number of Bucket Teeth Number of Thumb Teeth Weight
US Pounds
All weights are approximate. Weights are estimated assuming no add-ons, options or payloads.
Class 5
6-8 Metric Tons
13,200-17,600 lbs
24" 4 teeth 3 teeth 375 lbs
30" 5 teeth 4 teeth 400 lbs
Class 10
8-14 Metric Tons
17,600-30,800 lbs
18" 3 teeth 2 teeth 675 lbs
24" 3 teeth 2 teeth 675 lbs
30" 4 teeth 3 teeth 705 lbs
36" 5 teeth 4 teeth 705 lbs
Class 15
14-18 Metric Tons
30,600-39,600 lbs
18" 3 teeth 2 teeth 850 lbs
24" 3 teeth 2 teeth 850 lbs
30" 4 teeth 3 teeth 870 lbs
36" 5 teeth 4 teeth 900 lbs
42" 5 teeth 4 teeth 900 lbs
Class 20
18-22 Metric Tons
39,600-48,400 lbs
24" 3 teeth 2 teeth 1,000 lbs
30" 4 teeth 3 teeth 1,045 lbs
36" 4 teeth 3 teeth 1,045 lbs
42" 5 teeth 4 teeth 1,110 lbs
48" 6 teeth 5 teeth 1,110 lbs
Class 25
22-28 Metric Tons
48,400-61,600 lbs
30" 4 teeth 3 teeth 1,125 lbs
36" 4 teeth 3 teeth 1,125 lbs
42" 5 teeth 4 teeth 1,185 lbs
48" 6 teeth 5 teeth 1,270 lbs
54" 6 teeth 5 teeth 1,270 lbs
Class 30
28-36 Metric Tons
61,600-79,200 lbs
36" 4 teeth 3 teeth 1,580 lbs
42" 5 teeth 4 teeth 1,580 lbs
48" 5 teeth 4 teeth 1,580 lbs
54" 6 teeth 5 teeth 1,700 lbs
60" 6 teeth 5 teeth 1,700 lbs

Options

  • Serrated or Smooth Teeth

    Serrated or Smooth Teeth Serrated teeth provide a more secure grip on the material being handled. Smooth teeth don't mar or cut into the material. We recommend smooth teeth for working with things like logs that will be cut into lumber or stones intended for use in decorative landscaping.

Pricing

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1 (330) 678-2511

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