Cutting Edges for Buckets

A bolt-on cutting edge is a sacrificial steel strip that wears so the bucket does not have to. Replacing it on time costs far less than rebuilding a bucket lip.

Key points

A cutting edge is a replaceable wear part that protects the bucket lip.
Flip or replace it when worn near the bolt line, cracked or bent.
Match length, thickness and hole pattern, and use new hardware.
Block the bucket safely and never work under it on hydraulics alone.
Hire a welder for weld-on edges or lip repairs.

What does a bucket cutting edge do?

The cutting edge is a replaceable steel strip bolted along the front lip of a bucket, blade or scraper. It takes the wear of scraping gravel, dirt and concrete. Once it wears down, you swap it instead of repairing the bucket itself.

Edges come in flat, beveled and serrated types. Which one you choose depends on the work. Check the bucket maker's guidance and your dealer's recommendation.

How do you know when to flip or replace the edge?

Many edges can be flipped end for end or turned over once the working side wears. When the edge is worn near the bolt holes, cracked or bent, replace it. If the bucket lip beneath is starting to show wear, you have waited too long.

A worn edge reduces scraping and loading performance and puts extra load on the loader. Look at it each season, and more often if you scrape gravel drives or concrete pads.

Take a photo of the edge each season in the same light and position. A side-by-side comparison shows how fast the edge wears for your type of work, and tells you when to buy the next one before the old one is gone.

Edge worn down near the bolt line
Cracks or chips along the cutting side
Bent or wavy edge that no longer scrapes clean
Bolt heads worn or missing
Bucket lip showing scratches or wear

How do you choose the right replacement edge?

Match the length, thickness and bolt hole pattern to your bucket. Bring the old edge or take careful measurements. Ask whether you want a standard steel edge or a harder-wearing type, and what that means for use in rocky or abrasive soil.

Buy new bolts, nuts and washers matched to the edge. Reusing old, stretched or worn hardware is a common reason edges loosen.

How do you change a bolt-on edge safely?

Rest the bucket upside down or securely on the ground or blocks. Do not work under a raised bucket supported only by hydraulics. Shut down the tractor and remove the key. Use penetrating oil on rusted bolts and wear eye protection.

Remove the old edge and clean the bucket lip. Fit the new edge, install new hardware and tighten as the maker specifies. Recheck after the first hours of use. If a bolt shears, stop and have a shop deal with the broken stud.

Should you ever weld an edge on?

Weld-on edges exist, but welding on a bucket lip calls for correct procedures and materials. A badly made weld can crack the lip or lose hardness in the steel. If you are not experienced, hire a qualified welder.

Bolt-on is simpler for most owners and keeps the bucket lip protected.

How do you get longer life from an edge?

Keep the bucket angle correct when scraping so the edge wears evenly, and avoid dragging it on hard pavement or into buried concrete. Do not use the edge as a pry bar. Lift the bucket slightly on gravel drives to avoid digging.

Keep a spare edge and hardware in the shop. Catching wear early means one afternoon of work instead of a damaged bucket.

Measure the edge thickness with a tape or caliper at the start of each season and write it on the bucket with a paint pen. A number you can compare next year takes the guesswork out of deciding when to flip or replace it.

When is replacement not worth DIY?

If the edge is very long and heavy, or you lack safe lifting equipment, have a shop do it. If the bucket lip is cracked or deformed, a welder or the dealer should repair it.

Your accountant can tell you how maintenance and repairs are handled for your operation.

Pay attention to bolt style. Many edges use plow bolts with a countersunk head so the bolt sits below the cutting face. Using the wrong bolt leaves heads sticking out that catch and wear quickly, and loose bolts can let an edge slip out of position in the middle of a job.

When to get help: Call the dealer service department or a qualified welder for lip damage, broken studs or weld-on edges. Ask your accountant how repairs fit your operation's records.

Sources and further reading

Organization homepages are linked so you can search them for current guidance on this topic.

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