50,000+
Attachments delivered since 2008
Family-built. Made in Ostrołęka.
Part of an industrial group founded in 1996, Sieruta has built excavator attachments since 2008. We build our attachments in series: more than 50,000 delivered, 27,897 of them since 2018. Custom engineering is kept for the heaviest attachments and for new designs we develop with customers. Cutting, machining, welding and painting are done on one site in Ostrołęka.
Sieruta Attachments is a brand of Hydro-Instal T.Sieruta B.Sieruta sp.j.Part of Hydro-Instal: hydro-instal.pl
1996
Founded
100
People in the group
15
Export markets
6
Engineers in our design office
8 t
Heaviest attachment built
3,000 m²
Manufacturing area
Part of a family-owned industrial group
Sieruta Attachments is one of three divisions in a family-owned Polish industrial group founded in 1996. The others build stainless-steel tanks and industrial installations. The group holds UDT authorisations for the manufacture, modernisation and repair of pressure vessels. Tadeusz and Beata Sieruta founded the group in Ostrołęka in 1996. We have built attachments since 2008, and Adrian Sieruta leads Sieruta Attachments.
That is where the welding standard comes from. Quenched-and-tempered wear plate has to be welded with care. Poorly controlled heat input, preheat and interpass temperature increase the risk of excessive HAZ softening and hydrogen-assisted cold cracking in quenched-and-tempered steels. A shop already audited for pressure equipment runs those controls as a matter of routine. The attachments division, established in 2008, works in the same welding system: controlled preheat, inter-pass temperature and cooling, its own qualified procedures, and welders certified to EN ISO 9606-1.
Milestones
1996
Group founded in Poland
Hydro-Instal is founded in Ostrołęka.
2006
Stainless-steel tanks
The group invests in a new line of business: the manufacture of stainless-steel tanks.
2008
Attachments division established
Excavator bucket production starts inside the group, at first as OEM work.
2017
New management for attachments
The attachments division gets new management and a team of its own.
2024
Investment in quick-coupler R&D
We invest in research and development on new quick-coupler designs.
Export markets
Home market: Poland. We also deliver into these markets:
- Spain
- France
- United Kingdom
- Germany
- Austria
- Czechia
- Estonia
- Finland
- Sweden
- Greece
- Hungary
- Netherlands
- Belgium
- Luxembourg
- Denmark
Our certificates and their numbers
Certified welding quality
EN ISO 3834-2
CSW/1293/2025
Factory production control
EN 1090-1 EXC1 + EXC2
1433-CPR-0257
Qualified welders and procedures
EN ISO 9606-1 · WPQR EN ISO 15614
Non-destructive testing
EN ISO 9712: VT + PT level 2
where the drawing or inspection plan requires it
Material traceability
EN 10204 3.1
CE marking
CE: 2006/42/EC
What we make
Our product lines
- Buckets
- Quick couplers
- Tools
- Grapples
Catalogue attachments for excavators up to 65 t.
Larger attachments, up to 8 t for excavators up to 80 t, are custom engineered to order.
How we check it
- Welding under our EN ISO 3834-2 certified quality system.
- A record for every serial number, so the spare parts match your attachment.
- Engineered-to-order builds pass a factory acceptance test before dispatch: dimensions, welds and fit.
Every offer names the dispatch week.
What we hold ourselves to
Built to the drawing
Plate thickness and weld size follow the drawing. The welding procedure is qualified, and we weld to it.
Traceable steel
EN 10204 3.1 inspection certificates per heat, kept with the order, so you can ask what grade is doing the work and get the paper.
Serviceable in the field
Designed to be serviced on site and repaired by the people who run it.
HQ and manufacturing
Made in Poland.
Delivered across Europe.
Hydro-Instal T.Sieruta B.Sieruta sp.j.
ul. Bohaterów Westerplatte 11
07-410 Ostrołęka
Poland
Cutting, machining, bending, rolling, welding, assembly and painting on one site. Visitors are welcome by appointment.
Located in Poland, 120 km from Warsaw and its airport
More than 50,000 attachments delivered in total, 27,897 of them since 2018
We keep a record for every serial number, more than 50,000 of them: the attachment type, the adapter, the teeth, and when it was ordered and produced. Give us the serial number and we know which adapter and teeth to send as spare parts.
In the factory
Finished buckets on pallets, loaded in the trailer.
A forklift carrying a palletised bucket out of the factory.
Fitting a pin into a machined coupler body.
Large excavator buckets standing outside the factory next to a loaded trailer.
Need a price for your machine?
Tell us the machine and the attachment you need. We usually reply within 1 working day.