Lawn Mower Blades
Common Blade Measurements
Center Hole Dimensions / Diameter
Top View
Length
Width
Outer Hole Dimensions / Diameter
Center to Center
L-Cut: Counterclockwise rotating blade; cutting-edge is on opposite side of blade.
Side View
Thickness
O set
.030"
Right-End View
30˚
Air Lift
Blade Arbor Hole Types
5 or 7-Point Star Center holes may be 5 or 7-point star shaped.
The two sizes of the 6-point star. If your blade spindle has a bolt and lock washer that holds the blade to the machine, you would use the 11/16" star or “Y” blade
5-Point Star
7-Point Star
Square or Rectangular The MTD built blades on many walk-behind lawn mowers have a “bow-tie” hole. In this case the Oregon replacement blade will have a rectangular center hole which will fit on the bow-tie pat- tern on the blade adapter. Bow-Tie Rectangular Bow-Tie / Rectangular
5-Point Star
7-Point Star
B
If your blade is secured with a large flange nut, then you would use the 5/8" star or “Y” blade
Bow-Tie 5-P int Star
Rectangular 7-Point Star
Bow-Tie / Rectangular
6-Point Star
“Y”Center Hole
6-Point Star “Y”Center Hole
MTD Blades The MTD built blades (Bolens, Cub Cadet, Troy-Bilt, White, Yard Machine and Yardman) may have a 6-point star. Oregon replace- ment blades will have a “Y” shaped center hole which will fit exactly on the 6-point star on the blade spindle.
Bow-Tie
Rectangular
Bow-Tie / Rectangular
6-Point Star
“Y”Center Hole
6-Point Star “Y”Center Hole
6-Point Star
“Y”Center Hole
6-Point Star “Y”Center Hole
LG 353
Lawn Mower Blades
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