Tools · Hydraulic thumb
TH - hydraulic thumb for excavator
Standard
- 10–30 tons
- On request
- Carriers: Midi, Standard
The TH hydraulic thumb sits on the dipper stick and grips against the bucket, so the excavator can pick up and hold rocks, logs, pipes and debris. When you do not need it, it folds back against the stick.
About this family
It is mounted on the main pin or welded to the stick. The direct link moves through 140 degrees, the progressive link through more than 180 degrees. The cylinder has a double pilot check valve as standard, the teeth are serrated and the pivots have grease points.
Four sizes: TH-16 for excavators from 10 to 16 t (700 mm wide, 310 kg, tip radius 1150 mm), TH-19 for 16 to 19 t (700 mm, 340 kg, 1200 mm), TH-26 for 19 to 26 t (780 mm, 520 kg, 1420 mm) and TH-30 for 26 to 30 t (800 mm, 620 kg, 1520 mm).
Features
- Two installation options: on the main pin or welded to the stick
Two link designs:
- Direct Link Design: Range of motion 140 degrees
- Progressive Link Design: Range of motion 180 degrees and more
- Hydraulic cylinder with double-acting check valve
- Serrated teeth for secure object gripping
- Grease points on the pivot points
- Compatibility: Works with the bucket and quick coupler already on your excavator
- Hydraulic Operation: Gives fine control and a firm grip on the material
- Material: Made of high-strength steel.
- Double Pilot Check Valve (Standard): Holds the load even if a hydraulic line fails
Typical jobs
The Hydraulic Thumb Attachment is used for:
- Demolition work requiring debris handling
- Land clearing and site preparation: picking up and moving debris
- Pipe laying operations
- Forestry work holding logs and brush while the machine moves them
- Construction projects where rocks, pipes and materials are set down in place
- Demolition work where a lot of material is sorted
- Jobs that need more grabbing and handling than a standard bucket can do
Our Hydraulic Thumb lets your excavator pick up and hold rocks, logs, pipes and debris. Tell us the machine and the material and we confirm the configuration.
Models and specifications
Figures as printed on this family’s datasheet. A dash means the datasheet does not state that figure.*Disclaimer: specific weight and dimensions depend on the configuration of excavator and attachments. Data above is approximate.
Datasheet (PDF)- Which bracket does your machine take? See the coupler fit reference
- Looking for your machine by make and model? See the machine fit tables
| Model | Machine class [t] | Width [mm] | Tip radius [mm] | Weight [kg] |
|---|---|---|---|---|
| TH-16 | 10–16 | 700 | 1150 | 310 |
| TH-19 | 16–19 | 700 | 1200 | 340 |
| TH-26 | 19–26 | 780 | 1420 | 520 |
| TH-30 | 26–30 | 800 | 1520 | 620 |
→ Scroll the table sideways to see every model.
Compliance, certification & documentation
- EN ISO 3834-2Certified welding qualityCSW/1293/2025
- EN 1090-1 EXC1 + EXC2Factory production control1433-CPR-0257
- EN ISO 9606-1 · WPQR EN ISO 15614Qualified welders and procedures
- EN ISO 9712: VT + PT level 2Non-destructive testingwhere the drawing or inspection plan requires it
- EN 10204 3.1Material traceability
- CE: 2006/42/ECCE markingTransition to Regulation (EU) 2023/1230 underway. Applicable from 20 January 2027.
Warranty
Sieruta covers manufacturing defects in the components it makes itself.
Normal wear, misuse or overloading and unauthorised modifications are not covered. Warranty terms and claims
Request a quote
Tell us your machine and the job. An engineer checks the fit, and we usually reply within 24–48 hours.