To find the proper replacement mower blade you need to:
Find the OEM part #’s suitable for your mower using one of the following steps:
If a dealer has their own system of #s, it probably will not provide a cross reference.
Once you have the OEM Part # for the Blade Type you are looking for simply type the Part # into the MowMore Instant Parts Finder on the MowMore home page to find your replacement blade.
Your last resort would be to measure your current lawn mower blade as described in the MowMore FAQ "How to Measure a Lawn Mower Blade".
The best way to find a replacement blade is by looking up the OEM# (original part # for the blade) from the owners’ manual. The next best would be to find the number stamped into the blade you are using now, usually somewhere between the outside holes or near the center hole. This number can be used to find an OEM replacement blade or cross reference high-quality aftermarket blades at a reduced cost.
If the stamped part number is not visible, a wire brush or emery cloth may do the trick. If the number is still not visible or the blade is discontinued, you can easily find a replacement by measuring the mower blade length, width, outer hole diameters, and center hole configuration.
The most prevalent lawn mower blade center hole is a round center hole. Other types of center hole configurations include the bow tie center hole, the 5-point, 6-point, and 7-point center holes, and the rectangular center hole.
The round center hole size is based on diameter. The rectangular center hole is measured by length and width. All others simply match the shape.
Star center holes are not measured by size. They will fit on a specific matching spindle. Blades with a Bow Tie of H pattern will also not have a measurement. They will fit a 5-point, 6-point or triangular spindle.
Side holes are always round and measured by diameter. If your blade has side holes the replacement blade must also have side holes in order to secure the blade properly.
The roles of different types of Lawn Mower Blades.
How to select the right trimmer line?
There are several things to understand when selecting the right trimmer line for use on your trimmers. Primarily size, shape, material, and style. The selection of the right line is primarily dependent on the job you are doing and the capability of your trimmer.
Trimmer Line Sizes?
In general, the tougher the cutting job is the thicker the trimmer line needs to be. Thicker trimmer line is more durable and will last longer and is less likely to break or wear out.
The downside is the impact on your trimmer. Thicker line has more wind resistance requiring more power to rotate the trimmer head. If the line is too thick for the power of the trimmer it will not work effectively and wear out early.
See the owner’s manual for maximum line size.
The purpose of different Trimmer Line Shapes?
The trimmer line shape will also affect cutting performance and trimmer efficiency. Selecting the right trimmer line for the job will save time and money.
Round Trimmer Line – this basic standard shape is used in most trimmers for light work on residential lawns with light weeds. It’s the least expensive and is easy to replace. This line rips the grass rather than cutting it, but the round shape does not wear down as quickly and is more durable around concrete, asphalt, trees, and roots.
Edged Trimmer Line – trimmer line with sharp edges such as square, star or pentagon is best for commercial jobs with heavier weeds and larger lawns.
Unlike round trimmer line, the sharp edges cut through grass and weeds quickly and give a clean cut. More efficient cutting is also faster and puts less strain on the trimmer.
The downside is this line tends to break more easily when it contacts concrete, stone, etc. so landscapers should keep plenty on hand.
Twisted Trimmer Line – twisted trimmer line is for heavy duty use on yards with heavy thick weeds. The twisted shape provides some edge for a cleaner cut than round line. This line is also very durable around concrete, stone or other hard surfaces, is more efficient than round line, and reduces trimmer vibration and noise.
What is typical Trimmer Line Material?
Trimmer line is usually made of nylon material. Commercial grade trimmer line is usually reinforced composite nylon which adds extra strength, durability and resists breakage. Heavy duty trimmer line is usually nylon composite reinforced with aluminum or other polymers.
Cost, durability, and efficiency should be the considerations for commercial landscapers.