A chain trencher on the arm cuts a continuous narrow trench at set depth, throwing spoil to one side.
The comparison that matters isn't against a dedicated trencher — it's against the bucket already on your machine. For long straight runs in reasonable soil, the chain is faster and cleaner. For anything with obstacles, varying depth, or rock, the bucket wins.
What You'll Use It For
- Long utility and conduit runs
- Irrigation mainlines and laterals
- Drainage and French drain excavation
- Electrical and communications burial
- Fence bottom rails and kickboards
- Any continuous narrow trench at consistent depth
Trencher vs. Trenching Bucket
The real decision, since you already have a bucket.
| Chain Trencher | Trenching Bucket | |
|---|---|---|
| Speed on long runs | Faster | Slower |
| Trench walls | Clean, consistent | Rougher |
| Spoil | Fine, easy to backfill | Chunky |
| Obstacles | Poor — stops or damages chain | Works around them |
| Rock | Poor without rock chain | Better |
| Varying depth | Awkward | Easy |
| Cost | Additional attachment | Already have it |
Buy the trencher if you do repetitive long runs in reasonable soil — irrigation, conduit, drainage at volume.
Stick with the bucket if your trenching is occasional, obstacle-heavy, rocky, or varies in depth. Which describes most general excavation work.
Why Put One on an Excavator?
Fair question, since dedicated trenchers exist.
Reach. Trench along a bank, across a ditch, or in places you can't drive a walk-behind or ride-on trencher.
One machine. Trench, then swap to a bucket to dig the pit at the end, then backfill and grade. No second machine on site.
Obstacle handling. When the chain hits something it can't cut, swap to a bucket and work around it — without bringing in another machine.
Dedicated trenchers still out-produce it on long open runs in good soil. The excavator's advantage is versatility.
How to Spec It
Depth. Set by the boom configuration. Confirm against your burial depth requirement.
Width. Chain and tooth configuration, typically 4–8 inches.
Chain type. This matters more than anything else.
- Dirt chain (cup teeth) — soil, clay, loam. Fastest in normal ground.
- Combination chain — mixed soil with stone. The practical all-rounder.
- Rock chain (carbide) — shale, hardpan, stony ground. Slower in soil, survives conditions that destroy a dirt chain.
Crumber. Cleans loose spoil from the trench bottom.
Side-shift. Lets you cut close to a curb, wall, or edge without repositioning.
Flow requirement. Sustained hydraulic demand — confirm against the auxiliary circuit.
Mounting. Pin dimensions or coupler.
Safety
Call 811 before every job. A trencher chain goes through utilities without slowing down, and trenching runs cross every service lateral on a property. 811 marks public utilities to the meter only — private lines are the owner's responsibility and are frequently what gets hit.
Trench protection at 5 feet and deeper, per OSHA. Never enter unprotected.
Keep spoil back from the edge.
Never clear a chain with the machine running.
Trades That Use It Most
Irrigation · Utility and septic · Electrical · Drainage · Landscaping · Fencing
FAQ
Trencher or bucket?
Trencher for long runs in good soil. Bucket for obstacles, rock, varying depth, and occasional work.
Is it faster than a dedicated trencher?
No. A purpose-built trencher out-produces it on open runs. The excavator's advantage is versatility and reach.
Will it work in rock?
With a rock chain, in hardpan and stony ground — slower. Solid ledge stops it.
How deep can it go?
Set by the boom. Confirm against local burial depth code.
Do I need auxiliary hydraulics?
Yes, and trenching is sustained demand — verify the flow match.
What chain should I get?
Match to your soil. Combination chain if it varies. Running a dirt chain in rock destroys teeth quickly.
What maintenance does it need?
Chain tension is the main item — check it regularly. Replace worn teeth before they're gone, since running on worn teeth wears the sprocket.
Can it cut roots?
Yes, though large roots slow it and are hard on the chain.
Get a Quote
Tell us your soil, depth, and run lengths and we'll tell you honestly whether a trencher or a bucket serves you better.
Request pricing · Call (330) 825-2307