21" Replacement Blades for Ferris Mowers

These Stens 21 inch Replacement Blades for Ferris Mowers are precision balanced and heat treated for durability.

302-621 Toothed Silver Streak Blade.

302-621 Toothed Silver Streak Blade.

  • Toothed Blade
    (302-621)
    USD $21.68
  • Hi-Lift Toothed Blade
    (302-821)
    USD $31.06
  • Blade
    (315-872)
    USD $17.30
  • Blade
    (340-117)
    USD $18.43
    • Buy 2 for USD $16.60 each and save 10%
    • Buy 3 for USD $15.67 each and save 15%
  • Blade Bolt
    (410-066)
    USD $14.83
  • Blade Spacer
    (410-308)
    USD $5.76

Details

Rittenhouse carries the Stens Line of replacement blades for your Ferris Mowers. These blades are precision balanced and heat treated for durability.

We carry different types of blades to choose from including toothed blades, mulching blades, and rolled air-lift blades.

Toothed and mulching blades achieve smaller clippings for quick decomposition and a more manicured look.

A rolled air-lift blade lifts grass blades up for a cleaner cut and propels clippings up to be sucked into a mower bag easily.

The Silver Streak HiLift Toothed blade are made 25% thicker than most other toothed blades and has 40% higher lift. They have more surface areas to cut grass and leaves and have more sharpening area resulting in longer blade life.

To measure your lawnmower blade:
1) Measure the blade diagonally from cutting tip to cutting tip. For mulching blades measure on the back to ensure straight lines.
2) Measure the width at the widest part of the blade
3) Measure the center hole
4) Measure the center to center distance between the outer holes
5) Refer to our chart below to choose your blade accordingly

 

Part # Replaces Ferris OEM Blade Type Length Center
Hole
Width Thickness Fits/Notes
302-621 1520842S / 5020842 / 1520842 Toothed
Silver Streak
21" 5/8" 2 1/2" 0.203" Requires 3 for 61" deck
302-821 1520842S / 5020842 / 1520842 Toothed
Silver Streak
21" 5/8" 3" 0.250" Requires 3 for 61" deck
315-872 1520842S / 5020842 / 1520842 /
5101755
Notched
Air-Lift
21" 5/8" 2 1/2" 0.250" Requires 3 for 61" deck
340-117 1520842 / 1520842S / 5101755 Notched
Air-Lift
21" 5/8" 2 1/2" 0.203" Requires 3 for 61" deck
410-308 1541477S / 5041477 / 1541477 Blade Spacer 5/8"ID x 1"OD x 1/4"THK
410-066 1525019-76S / 5025019X76 / 1525019-76 Blade Bolt 9 1/2" Grade 5; 5/8"-11 size
Fits our 285-597 spindle assembly

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