Buckets · Digging buckets
UB - U-shape digging bucket
- We usually reply within 1 working day
- We check the fit before we send the quote
- 12 months warranty on manufacturing defects in the components Sieruta makes itself
- Every offer names the dispatch week
- If a bracket we made is wrong and does not fit your machine, we replace it.
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Built to your machine
The whole range: Excavator buckets
The UB bucket digs a trench with a U-shaped bottom, cut to profile in a single pass. That suits pipe laying, foundation work and utility installations, where a flat-bottomed trench has to be shaped by hand or partly filled back in.
Features
- U-shaped profile: Digs trenches with an even U-shaped bottom, for pipe laying, foundation work and utility lines.
- Trench shape in one pass: The trench is dug to its final shape in a single pass, so there is less backfilling and handwork.
- Reduced Material Handling: The U shape digs out only the trench profile, so less excess soil is excavated and hauled away.
- Available teeth systems: CAT J series, BYG Futura, ESCO UltraLok
About this family
U-Line Buckets dig a trench with a U-shaped bottom in a single pass.
U-Line buckets are for projects that need U-shaped trenches.
Cutting the trench to shape in one pass means less backfilling and less handwork. It also moves less spoil, so there is less material to haul away.
Teeth are available in the CAT J series, BYG Futura and ESCO UltraLok systems, so the teeth can be matched to the ground. The bucket fits direct or on the S, MS, CW, OQ, Martin and SW brackets.
Dimensions
Typical jobs
- Pipe laying for water and sewer systems
- Foundation work for construction projects
- Utility installations including gas and electrical lines
- Drainage system construction and maintenance
- Cable trench digging for telecommunications
- General excavation requiring U-shaped profiles
Which coupler is on your machine?
Pick the system on your machine and we put it in your enquiry. We check the bracket before we send the quote.
How to measure your coupler
Not sure which system it is? Three measurements tell us which bracket you need.
- Measure the diameter of both pins.
- Measure the distance between the pin centres.
- Measure the width between the inside faces of the ears.
If the coupler has a make or type printed on it, send that too.
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
12 months warranty on manufacturing defects in the components Sieruta makes itself.
Normal wear, misuse or overloading and unauthorised modifications are not covered. Warranty terms and claims
Why buy from the factory
- Cutting, machining, welding and painting on one site, our own factory in Poland, EU
- More than 50,000 attachments delivered since 2008
- A record for every serial number, so the spare parts match your attachment
Request a quote
Tell us your machine and the job. An engineer checks the fit, and we usually reply within 1 working day.
More from this family group
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The flat top suits excavators that change attachments on a quick coupler. It comes in Economy, Standard, Heavy Duty and Rock versions.
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GDH Heavy duty hydraulic grading & ditching bucket
The hydraulic tilt grading bucket shapes slopes and levels uneven ground.
StandardEarthmoving / heavy duty
DB Heavy duty digging bucket
A digging bucket for most materials, with a rock version for harder ground.
SDB Heavy duty skeleton DB bucket
The SDB separates material as you dig: soil falls through the ribs while stone, rubble and roots stay in the bucket.
RDBF Flat-top skeleton DBF bucket on rods
Interlocking steel rods replace the solid bottom, C45 as standard and Hardox® as an option. Soil sifts out from the rocks while you dig trenches, drains and pipe bedding.
