The Monde clamshell excavator bucket is the benchmark bivalve attachment for dredging work, handling bulk materials and excavating in difficult environments where a standard bucket cannot operate efficiently — water, sediment, mud, fine sand or granular materials that slide out when an ordinary bucket is opened.
The clamshell excavator bucket works through two hydraulically actuated valves that close completely when picking up the material and open in a controlled manner during unloading, eliminating material losses during transport and ensuring precise unloading at the desired point.
Available in a 360° rotating or fixed version, with capacities of 0.5 to 4 m³ and compatibility for excavators from 6 to 45 tonnes, the Monde clamshell excavator bucket covers applications from small-capacity hydrotechnical and port work to medium-class industrial dredging and mining projects in wet environments. Key advantages of the Monde clamshell excavator bucket
• Hydraulic actuation with single or double cylinders — the Monde clamshell excavator bucket is equipped with hydraulic cylinders sized for high closing force, essential when picking up dense materials, coarse gravel or mixed construction waste. The double cylinders provide additional gripping force on the large-capacity models and ensure symmetrical valve closing without torsion.
• 360° rotating version for maximum positioning precision — the clamshell excavator bucket in the rotating variant allows the operator to direct the material unloading exactly to the desired point — barge, hopper or stack — without repositioning the excavator. Full 360° rotation is essential in port dredging work where the manoeuvring space is limited and the unloading must be precise.
• Materials Q345, Q460, NM400, WH60, Hardox 450 — the structure of the Monde clamshell excavator bucket uses steels selected according to the application: Q345 and Q460 for the load-bearing structure, NM400 and Hardox 450 for the cutting edges and the zones with the highest wear when penetrating compacted materials or in contact with the water bed during dredging.
• Maximum opening 1,421–2,617 mm — the wide opening range of the Monde clamshell excavator bucket allows adaptation to the volumes of material picked up on each cycle, from precise operations in tight spaces to picking up large volumes on the medium-class 30–45 tonne excavators.
• Capacity 0.5–4 m³ for 6–45 tonnes — the Monde clamshell excavator bucket range covers everything from the 6-tonne mini-excavators used in small-scale hydrotechnical work and desilting of irrigation channels, to the 45-tonne excavators in medium-capacity port and lake dredging projects.
• ISO9001:2008, CE, SGS certifications — the Monde clamshell excavator bucket is produced under a certified quality management system and bears the CE marking, a mandatory requirement for use in projects with European funding and in public procurement through SEAP/SICAP.
• Customisation of width, capacity and actuation type — the Monde clamshell excavator bucket is configurable with dimensions, widths, heights and actuation type adapted to the specific requirements of the project. UZINEX engineers size the optimal configuration for the type of material, the working depth and the available excavator.
• 60-month UZINEX warranty — extended coverage with spare parts, seals and hydraulic elements in stock in Iași, with guaranteed 24–48 hour national technical support.
Technical specifications — Monde clamshell excavator bucket
| Parameter | Value |
|---|---|
| Compatible excavators | 6–45 tonnes |
| Capacity | 0,5 m³ – 4 m³ |
| Maximum opening width | 1.421–2.617 mm |
| Actuation type | 360° rotating or fixed (non-rotating) |
| Hydraulic cylinders | Single or double, depending on model |
| Structure materials | Q345, Q460, NM400, WH60, Hardox 450 |
| Certifications | ISO9001:2008, CE, SGS |
| Available colours | Yellow, black or customised |
| Customisation | Width, height, capacity and actuation type on request |
| Main applications | Port/river dredging, sediment, bulk materials, mining in wet environments |
The exact configuration — actuation type, capacity, cylinders and steels — is selected based on the application, the type of material and the available excavator. UZINEX engineers size the clamshell excavator bucket for the specific conditions of your work — free technical consultancy available . How the clamshell bucket for excavator works
The clamshell excavator bucket is a bivalve attachment — two bucket halves hinged on the upper axis, actuated by hydraulic cylinders connected to the excavator's auxiliary hydraulic circuit. When lowered onto the material, the valves are open; on the operator's command from the cab, the hydraulic cylinders pull the valves towards closing, picking up the material between the two halves.
The closing force of the cylinders is the critical parameter: the denser or more compact the material, the greater the required hydraulic force. The double-cylinder models of the Monde clamshell excavator bucket provide a superior closing force compared with the single-cylinder variants, and are recommended for coarse gravel, mixed construction waste or soils with cohesive components.
The rotating version of the clamshell excavator bucket adds a hydraulic rotation motor in the upper joint, allowing the bucket to be oriented independently of the excavator boom. This function is essential when working from a barge or a port quay, where the excavator cannot be repositioned on each cycle and where the unloading must be precise laterally relative to the work axis. Main applications for the clamshell excavator bucket
Port and river dredging is the benchmark application for the clamshell excavator bucket — desilting navigation channels, port basins, water intakes and riverbeds where sediment must be picked up from the water at variable depths. The clamshell excavator bucket can operate submerged, picking up the material directly from the water bed without requiring prior draining of the work area.
Desilting irrigation and drainage channels is a typical application for the small-capacity clamshell excavator bucket, on 6–15 tonne excavators. Irrigation channels in agricultural areas accumulate silt, alluvium and vegetation that reduce the transport capacity. The clamshell excavator bucket extracts the sediment without damaging the channel banks and unloads it directly into a hopper or onto the slope.
Handling bulk materials — sand, gravel, coal, slag, sawdust, grain or other granular materials — at sorting stations, feeding crushers or loading transport vehicles is an application where the clamshell excavator bucket outperforms a standard bucket in efficiency, because the complete closing of the valves eliminates material losses during lifting and transport.
Demolition and site-clearing work involving the handling of demolition waste, broken concrete debris, rubble or heavy mixed materials benefits from the high closing force of the double hydraulic cylinders of the Monde clamshell excavator bucket — especially in the variants with Hardox 450 on the cutting edges.
Mining in wet environments — extracting sand and gravel from riverbed deposits, clay or ores from areas with a surface water table — is an application where the clamshell excavator bucket is the only practical attachment, as a standard bucket cannot pick up submerged material without massive losses. Rotating vs. fixed clamshell bucket — how to choose
The choice between the rotating and the fixed version of the clamshell excavator bucket depends on the site configuration and the need for precision during unloading.
The fixed clamshell excavator bucket is the right solution when the excavator can be freely repositioned relative to the unloading point and when the unloading direction remains constant throughout the work — for example, lateral unloading into a drainage channel or into a truck hopper that is always in the same position relative to the excavator.
The 360° rotating clamshell excavator bucket is necessary when the manoeuvring space does not allow repositioning the excavator between cycles — dredging from a barge, work in narrow port basins or unloading at several successive points without moving the machine. The additional investment in rotation pays back quickly through the reduction of idle repositioning times on sites with space constraints.
On excavators equipped with a Monde DEHN quick coupler , switching from the clamshell excavator bucket to other attachments — standard bucket, ripper or compaction plate — is done from the cab in less than a minute, without the operator leaving the machine. Frequently asked questions about the clamshell excavator bucket
Does the clamshell excavator bucket require an auxiliary hydraulic circuit?
Yes — the clamshell excavator bucket requires an auxiliary hydraulic circuit with sufficient flow and pressure to actuate the closing cylinders and, in the rotating variant, the rotation motor. UZINEX engineers verify compatibility with your specific excavator at the quotation stage and confirm the required hydraulic parameters. Can the clamshell excavator bucket operate fully submerged?
Yes — the Monde clamshell excavator bucket is designed for submerged work, with appropriate seals on the hydraulic cylinders and the joints. The maximum submerged operating depth is confirmed at the quotation stage according to the chosen model and the length of the excavator boom. Is the clamshell excavator bucket available for excavators under 6 tonnes?
The standard Monde range for the clamshell excavator bucket covers 6–45 tonnes. For excavators under 6 tonnes, UZINEX engineers assess the availability of special configurations on request — contact the team for details. Is the clamshell excavator bucket eligible for public tenders?
Yes. The Monde clamshell excavator bucket bears the CE, ISO9001 and SGS certifications, meeting the technical documentation requirements for projects with European funding and procurement through SEAP/SICAP. UZINEX is a member of the Enterprise Europe Network and provides the complete documentation on request. Leasing options available on the UZINEX credit and leasing page . Why UZINEX for the clamshell excavator bucket
The clamshell excavator bucket is a hydraulic attachment with moving components — cylinders, joints, rotation motor — that require locally available spare parts so as not to halt the work. UZINEX keeps seals, wear parts and hydraulic elements in stock in Iași for immediate delivery, with no waiting times that block the site.
• 60-month warranty — extended coverage for the Monde clamshell excavator bucket, including hydraulic components and joints.
• Customised configuration — actuation type, capacity, cylinders and steels adapted to the specific application — dredging, bulk or demolition.
• Transport and installation included — delivery to destination, mounting on the excavator and operator training included.
• Spare parts in stock in Iași — hydraulic seals, joint pins and wear components immediately available.
• CE + ISO9001 + SGS — complete documentation for projects with European funds and public procurement through SEAP.
• National technical support 24–48 hours — a network of technicians with national coverage and a guaranteed response time.
The Monde clamshell excavator bucket available through UZINEX is the bivalve attachment for dredging, sediment and bulk materials — 360° rotating or fixed, 6–45 tonnes, 0,5–4 m³, Hardox 450, CE + ISO + SGS, 60-month warranty and transport included throughout Romania.
