Oregon Tool® 195-067 - 100 Series 21" Lawn Mower Blade

Blade Width - Measure near the center of the blade.
Thickness - Measure near the center of the blade.
Blade Length - Measured diagonally from the corners of the blade
Outer Hole Diameter - This is the diameter of any holes to the sides of the center hole.
Center Hole Size - Many blades will have a round hole in the center of the blade and you will need to know its diameter. Blade Length 5 or 7 Point Star Center holes may be 5 or 7 point star shaped. 5 point star on blade7 point star on blade 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 pattern on the blade adapter. Square or Rectangular hole on blade MTD Blades The MTD™ built blades (Bolens, Cub Cadet, Troy-bilt, White, Yard Machine, and Yardman) may have a 6 point star. Oregon replacement blades will have a 'Y' shaped center hole which will fit exactly on the 6 point star on the blade spindle. 6 point star for MTD blades 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. blade spindle with bolt and lock washer. If your blade is secured with a large flange nut then you would use the 5/8" star or 'Y' blade. blade spindle with large flange nut
Center-to-Center - If there are outer holes; this is the distance between the centers of those outer holes.
OffSet - (Sometimes referred to as offset): If you set the blade on a table this is the distance the center of the blade is above the table top (if any) when the cutting edges are flat on the table
Air Lift - Air lift is the distance the lift panel rises above the cutting edge.

Fit Guide
Husqvarna: 38454, 530 RS, 55 C 21 HVA, 55 R 21 HV, 55 R 21 HVA, 55 R 21 HVB, 55 R 21 HVC, 55 R 21 HVD, 55 R 21 HVL, 5521 CHV, 5521 CHVB, 5521 CHVX, 5521 CM, 5521 CMA, 5521 CMB, 5521 P, 5521 RS, 5521 RSA, 5521 RSB, 5521 RSC, 5521 RSD, 5521 RSE, 5521 RSX, 5521CM, 5521L, 6021 P, 6021P, 65 C 21 HVA, 65 RSW 21 HVA, 65 RSW 21 HVB (65C21HVB), 65021 CHV, 65021 ES, 6521 CM, 6521 RS, 6521 RSA (6522RRA), 6521 RSB, 6751P, 67521 ES, 67521 HV, 67521 HVE, 70 R 21 HV, 70021 CH1, 7021 CH1, 7021 CH1A, 7021 CH1B, 7021 CM, 7021 CMA, 7021 CMB, 7021 CMC, 7021 CP, 7021 F, 7021 KP, 7021 P, 7021 R, 7021 RC, 7021 RES, 7021 RH, 7021 RS, 7021KP, 7021P, 87521 RES, 87521 RSX (CA), LC 153-HD, LC121P, W 21 H, W 21 K, W 21 SBHC, W 21 SBK, W 21 SBKC, W 21 SK, W 21 SKC, W 53 SBEK, W 53 SEK, XT 721 F
Husqvarna/AYP: 55C21HVA, 55C21HVB, 55R21HVB, 55R21HVC, 55R21HVD, 55R21HVL

Replacement Guide
Craftsman: 159267, 175064, 189028, 406712, 580258101, 580258102
Dixon: 532106712
Husqvarna: 159267, 189028, 406712, 531300765, 531307235, 532159267, 532189028, 532406712, 539111878, 580258101, 580258102, 581694101
Husqvarna/AYP: 159267, 165833, 175064, 189028, 406706, 406712, 531300765, 531307235, 532159267, 532165833, 532175064, 532176135, 532189028, 532406712, 539111878, 580258101, 580258102, 917175064, 917175064PB, 917176135, 917532159267, 917532165833, 917532175064, 917532176135
Laser: 91683
Menards: 2705022
Poulan: 531307213, 531307235, 532175064, 532189028, 532406712, 539111878, 580258101, 580258102, 581694101, PP23020
Rotary: 9810
Tractor Supply: 4445105