Posts Tagged ‘Center Hole’

How to Measure a Lawn Mower Blade

Posted on: April 14th, 2017 by usmb No Comments



Knowing how to properly measure a lawn mower blade will make it much easier to find the proper replacement. There are three major measurements to consider: length, width, and center hole. Other important measurements to note are thickness and distance between outer holes. Also take note of the center hole type and measurement.


LENGTH: Length is measured diagonally from one tip of the blade to the opposite tip of the blade. It is important to measure the length correctly. Measuring from end to end will result in the wrong blade length. All length measurements must be made diagonally.


WIDTH: The width of the blade should be measured at the widest and flattest part of the blade – typically near the center of the blade. The width can be measured normally from edge to edge.


CENTER HOLE: The center hole measurement will depend on the type of hole being used. There are several different types of center holes: round, fiveCenter Hole Graphic-point star, six-point star, seven-point star, rounded rectangle, and H-pattern also known as bow tie.


Round center holes should be measured for inner diameter. 5-point star, 6-point star, and 7-point star center holes will not have a measurement but will be denoted by name. H-pattern or bow tie center holes will also not have a measurement. H-pattern center holes will accommodate several different spindle types including 5-point star, 6-point star, or triangle spindles.


Rounded rectangle center holes will typically have two measurements, inner length and inner height. Most lawn mower blades will have round center holes.


Some blades will have an extra set of holes set to either side of the center hole. These outer holes are measured two different ways — individual diameter and the space between the holes. Measure the outer hole inner diameter the same way as a center hole. The correct way to measure the distance between outer holes is from the center of one hole to the center of the other hole.


For more information about USA Mower Blade or for help measuring or determining replacement blades, please call customer service at 734-863-0149 or by e-mail here.

Finding the Right Mower Blade

Posted on: January 20th, 2017 by usmb No Comments

Finding the right mower blade can be challenging. The problem with purchasing replacement lawn mower blades online is they all look the same. Not being able to pick up the new blade and compare it the old blade can be frustrating. That’s why USA Mower Blade is trying to take the guess work out of buying replacement blades. Need a new blade? Or three? Start here:


Original Equipment Manufacturer Number. The easiest way to find replacement lawn mower blades is with the OEM number. The OEM number is the numerical part number of the blade assigned by the manufacturer. In most cases, just typing this number with the manufacturer name into a search engine or online store will be enough to bring up some promising results. Don’t have the OEM number? Not to worry, it is easy to find. Check the manual that came with the mower.


Model Name and/or Number. Don’t have the OEM number or a manual? Manuals for most newer mowers can be found on the manufacturer’s website. Searching for the mower manufacturer and model number is an easy way to find the needed information.


Length and Center Hole. Without an OEM number, manufacturer name, or model number, it can be difficult, but not impossible, to find the right replacement lawn mower blade. There are two blade characteristics to look at: blade length and center hole design.


LAWN4The blade length should be measured diagonally from the opposite tip on each side. A blade that is too long will not fit under the deck while a blade that is too short will leave grass uncut. Finding the right blade length is very important.


The center hole is how the blade attaches to the spindle assembly under the mowing deck. There are several different types of center hole designs, including circle in various sizes, rounded rectangle, H-pattern, Y-pattern, and 5-point, 6-point, or 7-point star pattern. With the exact blade length and the correct center-hole pattern or size, it will be easy to identify the correct replacement lawn mower blade.


For help identifying the proper replacement lawn mower blade, please call Customer Service here or by phone at: 734-863-0149.


USA Mower Blades are available to purchase online from