How to Replace a Lawn Edger Blade
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Lawn edger blade replacement is a short job: remove the battery or unplug the tool, loosen the blade nut, swap the old blade for a matching new one, and tighten the nut before you run the edger again. The steps differ by brand, so the first thing to confirm is the exact part number for your model. This guide covers the general steps, the safety checks that apply to any edger, and the replacement blades listed in this site’s product pack, with the listing facts for each.
Quick answer
- Remove the battery pack, or unplug a corded edger, before you touch the blade, and wear gloves.
- Loosen the blade nut with the tool’s wrench, remove the old blade, and fit the new one with its washers in the right orientation.
- Tighten the nut securely before you use the edger.
- Match the blade to your edger by part number, not by size alone. Consult the owner’s manual for the part number and installation.
Before you start: check the part number
An edger blade is not a universal part. Two blades of the same length can have different center holes, thicknesses or shapes, and the listings in this roundup show that clearly. One listing gives a 7-3/4 inch by 2-3/4 inch blade with a 1/2 inch center hole and a thickness of 0.090 inches, while another gives a 7.5 inch blade with a 0.5 inch center hole and a width of 2 inches. A third lists a 9 inch star blade with a 5/8 inch center hole. These are different parts, so the length alone does not tell you whether a blade will fit.
Start by finding the number on the old blade or in the owner’s manual. The product pack lists several part numbers for each blade, such as WA0034, 50018386, 243801-00, EB-007, 85755 and CMZEB700. If your old blade has one of these numbers stamped on it, you can match it directly. If the number is worn off, use the model number of your edger to look up the correct part in the manual, and compare the center hole size and blade length before you buy.
Before buying, also check whether the replacement is sold as a single blade or a pack. Several listings in this roundup come as two-pack, three-pack or six-pack sets, which lets you keep spares on hand. Keep spare blades dry and out of direct sun, because some listings mention rust resistance but no listing promises that a blade will never rust.
Safety checks before you touch the blade
The first safety step is to cut the power. For a cordless edger, remove the battery pack. For a corded edger, unplug it from the outlet. The Ryobi support page for its own edger gives the same starting point: remove the battery pack, and wear gloves. Do this before you reach near the blade, even if you think the edger is off.
Wear gloves for the whole job. One blade listing in the product pack recommends wearing professional installation gloves to protect your hands during installation. Edger blades have serrated edges, and an old blade can still be sharp enough to cut even when it is worn.
Check the old blade before you remove it. A blade with wear indicators is designed to show when it is time to replace it. One listing says the wear indicators let you know when a blade needs replacing, and a Craftsman-compatible listing advises you to check the wear indicators regularly and to inspect the blade for bending or damage before each use. If the blade is bent, cracked or worn down past its indicator, replace it rather than reusing it.
Step-by-step replacement
The general sequence is the same across most edgers, even though the parts and the nut size differ. The steps below follow the Ryobi support page for a Ryobi edger, and the listing notes in the next section cover the blade side.
- Remove the battery or unplug the edger. Put the tool on a flat surface with the blade facing away from you.
- Loosen the blade nut. Use the wrench that came with your edger and turn it counterclockwise. The Ryobi page describes this step for its own edger, so use the wrench supplied with your model.
- Remove the old blade and clean the area. Clear grass, dirt and debris from the blade mount so the new blade sits flat.
- Fit the new blade. Place the washers and spacers in the order shown in the owner’s manual, then fit the new blade. Check that the blade is oriented the way the old one was before you tighten anything.
- Tighten the nut securely. The Ryobi page says to tighten the nut securely before use. A loose nut can let the blade shift during use, so do not skip this step.
- Test the fit. Turn the blade by hand to confirm it spins freely and does not rub the guard. Then reconnect the battery or plug the edger back in.
If a listed replacement does not fit the mounting hub, stop and check the part number rather than forcing the blade. The product pack notes that the listing for one Craftsman-compatible blade says to consult the owner’s manual for proper part number identification and installation.
Replacement blades listed in this roundup
The table below summarizes the edger blades in this site’s product pack. It gives the listing’s own dimensions and compatibility notes. Where a listing does not state a value, the table says “not stated.” Use the table as a starting point, then match the part number to your edger.
| Blade listing | Length and size stated | Center hole stated | Pack size | Compatibility stated in listing |
|---|---|---|---|---|
| WORX 7.5 inch Electric Lawn Edger Replacement Blade, WA0034 | 7.5 inch | not stated | 3 blades | Worx WG896; bolt and nut that came with the tool |
| DECKMAN WA0034 7-1/2 inch Replacement Blade | 7-1/2 inch, width 2 inch | 0.5 inch | 3 pack | Worx WG895 and WG896; also listed for a Craftsman edger/trencher |
| CLSR2U Replacement 7-1/2 inch Edger Blade WA0034 | 7-1/2 inch, width 2 inch | 0.512 inch | 3 pieces | Worx WG895 and WG896; Craftsman edger/trencher 7.5 inch blade |
| 2 PK 243801-02 Edger Blade | 7-3/4 inch by 2-3/4 inch | 1/2 inch | 2 pack | Black and Decker LE750 and EH1000; Craftsman CMEED400 |
| BLACK+DECKER Edger Replacement Blade, EB-007 | 7-1/2 inch | not stated | 1 blade | LE750, LE710, LE760 |
| Andorm 6-pack 2059 Edger Blades | 9 inch by 2 inch | 1/2 inch | 6 pack | Mclane 2059, Craftsman 85755 and others listed |
| 2 Pack 9 inch 3-Side Edger Star Blade | 9 inch by 9 inch | 5/8 inch | 2 pack | Craftsman, Troy-Bilt and MTD parts listed by number |
| Mayoki 2-Pack 9 inch Stick Edger Blades | 9 by 3 by 0.6 inch | not stated | 2 pack | Mayoki EGBR20, EGBR18 and EGBRMT |
| Replacement Edger Blade for CRAFTSMAN CMZEB700 | 7.25 inch | 0.5 inch | 4 pack | Craftsman CMCED400 family; Black and Decker EB-007; Worx WA0034 |
The Mayoki listing is for a stick edger, so do not assume a blade fits your edger because it appears in the table. The listing for each blade names the models it fits, and that list is the rule to follow.
Matching a blade to your edger
The fastest way to choose is to start from your edger’s model number. Look for the part number in the owner’s manual, then search the listing for that number. If the listing lists your model, check the length, center hole and thickness against the old blade. If it does not list your model, do not buy it on size alone.
For Worx and Black and Decker edgers, several listings in the pack give the same part number family, such as WA0034 for Worx and EB-007 for Black and Decker. For Craftsman edgers, the listings show several numbers, including CMZEB700 and 85755, because Craftsman used different blade designs across models. Compare the number printed on the old blade with the numbers in each listing before you order.
Care and replacement timing
Rinse grass, dirt and debris off the blade after each use, wipe it dry, and store the edger in a dry place. One Craftsman-compatible listing gives this advice directly: rinse off debris after each use, store the blade in a cool, dry place away from moisture, and check the wear indicators regularly. Keeping the blade clean helps it cut cleanly and slows rust.
Replace the blade when it no longer cuts cleanly, when it is bent or cracked, or when the wear indicator shows it is worn. Do not try to straighten a bent blade. A listing in the pack advises inspecting for bending or damage before each use, and a bent blade is the reason to replace it.
Keep a note of the part number on the blade or in the manual, so you can order the same replacement the next time. Buying the same part number saves time when the blade wears out during the edging season.
FAQ
Do I need a special tool to replace an edger blade?
The Ryobi support page for its own edger says to use the included wrench to loosen and tighten the blade nut. Use the wrench that came with your edger. If you do not have one, check the owner’s manual for the size of the nut and the tool it requires before you start.
How do I know which replacement blade to buy?
Use the part number first. Compare the length, center hole and thickness in the listing with your old blade, and confirm the listed model matches your edger. The listings in this roundup state different sizes and different part numbers for different models.
Can I sharpen an edger blade instead of replacing it?
This guide does not give a sharpening method, and the product pack does not describe one. A blade that is worn to its indicator, bent or cracked should be replaced. Check the owner’s manual for any care instructions for your model.
Why do the listings say to consult the owner’s manual?
Part numbers, mounting hardware and installation steps differ between edger models. The owner’s manual lists the correct number and installation order for your model, and the listings say to consult it for that reason.
Is it safe to replace the blade with the edger plugged in?
No. Remove the battery or unplug the edger before you touch the blade. The Ryobi support page says to remove the battery pack and wear gloves before you start.
How often should I replace the blade?
There is no fixed interval in the sources used here. Replace the blade when it is bent, cracked, or worn to its wear indicator, and check it before each use.
Bottom line
The safe rule for lawn edger blade replacement is to remove power, match the part number, fit the blade in the order shown in your manual, and tighten the nut before use. If the old blade shows bending, cracking or wear to its indicator, replace it rather than reusing it. Buying by part number, not by length alone, is the step most people skip and the one that matters most.
If you are also deciding which edger to buy, read Best Cordless Lawn Edgers and String Trimmers Compared. For a step-by-step look at edging technique, see How to Edge a Lawn With an Electric Edger.