Excavator Bucket 300mm – MS03SY mount for 4-5.5t Excavators
House connections, sewer work, civil engineering on the construction site: The 300mm excavator bucket is the most commonly used trenching bucket in German-speaking countries – and for good reason. With the MS03SY mount (compatible with Lehnhoff® Symlock® system), it fits, for example, Kubota KX057-4, Yanmar ViO55, Caterpillar 305, Bobcat E50 – and all other excavators in the 4-5.5t class. Not an original Lehnhoff® product. Symlock® is a registered trademark of Lehnhoff®.
Who is this excavator bucket suitable for?
▪ Civil Engineering & Sewer Construction: For deeper trenches and harder soils
▪ Construction Companies: Higher breakout force for compacted soil
▪ Municipalities: Sewer repairs and pipeline renewal
▪ Suitable Excavators (Examples): Kubota KX057-4, Yanmar ViO55, Caterpillar 305, Bobcat E50 – and all other excavators in the 4-5.5t class
▪ SY Advantage: Thanks to the SY mount, it can also be used as a face shovel – one attachment, two directions of use.
Product Features
▪ Base body S355J2+N: Proven steel for daily construction site use
▪ Cutting edge 150 × 16 mm HB500: Wear-resistant steel for long service life
▪ Side cutters 8 mm: Protect welds and extend lifespan
▪ 3 bolted teeth: Individually replaceable – saves costs
▪ SY mount: Can be used as a digging bucket and face shovel – simply reverse it, no conversion needed
▪ Lifting hook: No additional tools needed for repositioning
▪ Primed & painted: Corrosion protection for storage and transport
▪ 1 year warranty on all welds
Technical Specifications
▪ Working width: 300mm
▪ Coupler: MS03SY (compatible with Lehnhoff® Symlock® system)
▪ Application: Excavator bucket and face shovel
▪ Suitable for excavators: 4-5.5t
▪ Number of teeth: 3
▪ Dead weight: approx. 78 kg
▪ Volume (SAE): approx. 65 l
▪ Cutting edge: 150 × 16 mm HB500
▪ Base body material: S355J2+N
▪ Cutting edge material: HB500 wear-resistant steel
Discover suitable attachments
▪ Rigid hydraulic grading bucket – without swivel function
▪ Grading bucket – for precise grading work
▪ hydraulic grading bucket – with swivel function
▪ Ripper tooth – for hard soils
▪ screening bucket – for sorting material
Heinz Baumaschinen
digging bucket 300mm 30cm MS03SY KL3 | Robust excavator bucket for construction work
More technical data below
More technical data on the left
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FAQ
Which excavators is this digging bucket suitable for?
This digging bucket is designed for excavators in the up to 5.5 t weight class and is suitable for utility trenches, sewer connections and strip foundations. Compare your machine's operating weight with the technical data to avoid overload and premature wear.
Which mounting system does the attachment have?
The attachment has a MS03SY mount and is compatible with the Lehnhoff quick coupler system. This is not an original Lehnhoff product. Please compare the mount designation (e.g. MS03) with the marking on your quick coupler or the machine manual.
What is the difference between a standard mount and an SY mount?
Standard and SY mounts fit the same quick coupler. The difference is in the bucket geometry: an SY bucket, compatible with the Lehnhoff® Symlock® system, can be used both as a digging bucket and in reverse thanks to its symmetrical design. Simply turn it around; no conversion is required. A standard bucket such as MS03 can only be used in the normal digging position. This is not an original Lehnhoff® product.
What class is this digging bucket?
This digging bucket is assigned to class KL3 and designed for the corresponding load class. The class determines the maximum machine size. Always follow the weight-class table in the technical data.
What is the working width of the attachment?
The working width is 300mm and is suitable for utility trenches, sewer connections and strip foundations. Choose the width to match the planned trench or excavation. An excessively wide bucket increases backfilling effort, while a bucket that is too narrow increases the number of digging cycles.
How many teeth does this digging bucket have, and can they be replaced?
This digging bucket is equipped with 3 teeth. The teeth are bolted and can be replaced individually without replacing the entire bucket. Replacement teeth are available directly from us.
What material is this digging bucket made from?
The main body is made from S355J2+N structural steel and the cutting edge from HB500 wear steel. 8 mm S355J2+N side cutters protect welds and side plates. Buckets are supplied primed and painted and include a 1-year warranty on weld seams.
Is this digging bucket available in other widths or mounting systems?
Yes. Variants mainly differ in working width and application. Use the filters to find versions compatible with your mount and excavator class. Need a special size or a different mount? Contact us – we also manufacture custom sizes.
What is included in the delivery?
The delivery includes 1× digging bucket 300mm 30cm MS03SY KL3 | Robust excavator bucket for construction work. Quick couplers, hydraulic accessories and machines are not included. Shipping within Germany is generally dispatched within 24–48 hours after receipt of payment.
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Alternative Variants & Designs
Other compatible options for your excavator
These variants mainly differ in working width and area of application.
Excavator digging buckets – Precise Excavation for Every Construction Site
digging buckets are among the most frequently used attachments in excavation, sewer, and pipeline construction. They are specifically designed for excavating trenches, foundations, and building pits, allowing for clean, controlled material pickup.
Depending on working width, volume, and bucket class (KL), the digging bucket can be optimally matched to the respective machine and application. A well-matched volume ensures efficient work while maintaining control over the excavation.
Depending on the machine and application, our digging buckets are available with MS mount (Lehnhoff-compatible), CW mount (Verachtert-compatible), pin-on attachment, or a custom special attachment upon request.
👉 Further versions can be found under
digging buckets for Excavators