Types of excavator buckets
Excavator buckets are not one-size-fits-all. Each type is optimised for a specific material and task. Using the wrong bucket for the job increases wear, reduces productivity, and can damage the attachment or machine.
Digging buckets
The standard excavator bucket for general earthworks. Digging buckets feature a curved profile to maximise fill ratio when scooping, with reinforced side plates and a fitted tooth bar at the cutting edge.
- Best for: general excavation, trenching, foundation digging
- Soil types: topsoil, soft to medium ground, clay
- Key feature: replaceable teeth for soil penetration and wear management
Bucket width is the primary sizing dimension. Narrow widths (300–450mm) suit precise trenching; wider buckets (600–1200mm) move more material per pass.
Grading (ditch cleaning) buckets
Grading buckets have a flat cutting edge — no teeth — and a shallower profile designed for spreading, levelling, and profiling rather than breaking into ground.
- Best for: backfilling, levelling, grading banks and slopes
- Also used for: cleaning ditches and drainage channels to a flat profile
- Key feature: smooth cutting edge reduces surface disturbance
Grading buckets are typically wider than digging buckets of the same machine class. A tilting hitch paired with a grading bucket significantly improves accuracy on sloped ground — see the Harford Tilting Hitch.
Riddle (skeleton) buckets
Riddle buckets have an open tine or grid construction instead of a solid back. Soil passes through the tines while larger material — rocks, roots, rubble — is retained for removal.
- Best for: site clearance, separating topsoil from stone and roots
- Also used for: general sorting and grading of excavated material
- Key consideration: tine spacing determines what material is retained
Ditching buckets
Ditching buckets are designed to form drainage channels. They feature a wide, curved profile that matches the desired ditch cross-section, with angled side plates that create a consistent channel shape in a single pass.
- Best for: forming drainage channels, agricultural ditches, culvert work
- Profile options: flat-bottom, V-section, or curved ditch profiles
- Key benefit: consistent channel profile reduces repeat passes
Rock and heavy-duty buckets
Heavy-duty buckets for quarrying, demolition, and hard rock excavation. These have thicker base plates, reinforced side cutters, and wear-resistant steel construction throughout. They are heavier than standard buckets — always check that the increased attachment weight does not take your machine over its rated capacity.
Sizing buckets by machine tonnage
Every bucket must be matched to your machine's operating weight class. The key parameters are:
- Machine operating weight — determines the structural load rating required
- Dipper pin centres — must match the bucket's pin spacing exactly
- Bucket width — wider buckets move more per pass but increase the load on the machine arm
- Bucket capacity (m³) — volumetric measure of material the bucket holds per pass
| Operating Weight | Typical Bucket Width | Typical Capacity |
|---|---|---|
| 1 – 3T | 200 – 400mm | 0.04 – 0.1 m³ |
| 3 – 6T | 300 – 600mm | 0.1 – 0.2 m³ |
| 6 – 10T | 450 – 750mm | 0.2 – 0.4 m³ |
| 10 – 18T | 600 – 1000mm | 0.4 – 0.8 m³ |
| 18 – 30T | 800 – 1500mm | 0.8 – 1.5 m³ |
These are indicative ranges. Always consult your machine manufacturer's maximum attachment weight specification before ordering.
Using a quick hitch with buckets
If your machine has a quick hitch fitted, your bucket must be compatible with that quick hitch system as well as being rated for the machine weight. Dedicated system buckets (for Safelock) have different pin geometry from standard-pin buckets. Check compatibility before ordering.
Bucket teeth and cutting edges are wear parts — they are designed to be replaced for longevity and versatility. Harford use bolt-on teeth and side cutters so you can replace wear parts and extend the life of the bucket.
\1Fixed or removable cutting edges\2Grading and levelling buckets use a straight hardened cutting edge instead of teeth for smooth precision work. Harford offer bolt-on replacement edges to extend the life of the bucket — versatility and a significant cost saving.