Center hole
7-point star blade hole: Oregon 92-105 and John Deere numbers
Oregon's 92-105 mulching blade has a 7-point star hole, is 17-1/16 in long, takes three blades per 48-inch cut and cross-references John Deere parts.
Also listed as 7 pt. star, seven-point star
Short answer
Oregon's 92-105 mulching blade has a 7-point star center hole. It is 17-1/16 in long (measured diagonally), 2.75 in wide and 0.164 in thick, and Oregon says it takes three blades for a 48-inch cut. Oregon cross-references it to John Deere parts including GX21784, GX21785, GX21786 and GY20852.
Key facts
- How to recognize it
- A star-shaped hole with seven points around the center.[1]
- How to measure or name it
- Identified by name rather than measurement.[2][3]Oregon's 92-105 page lists no hole size.
- What it mounts to
- Not confirmedNo maker in the sources read states what a 7-point star hole mounts to.
- How catalogs name it
- Oregon records it as "7 pt. star" (92-105) and "7 point star" on the product page.[1][3]
- Blades made with it
- Oregon 92-105 mulching blade: 17-1/16 in, 2.75 in wide, 0.164 in thick, 7-point star.[3][1]Oregon's catalog also lists 1/4 offset and 1-1/4 air lift.
- Mowers and decks that use it
- Oregon: three 92-105 blades per 48-inch cut; it replaces John Deere AM137757, AM137758, AM141035, AM141036, GX21784, GX21785, GX21786 and GY20852, and Oregon's fit guide includes the D140, LA130 and X140.[3]Oregon's aftermarket cross-reference; confirm your model and deck.
- Common mix-ups
- 5, 6 and 7-point stars look alike. Count the points, and never take a hole name as fit on its own.[1]
- Not confirmed
- Not confirmedHole size, what it mounts to and other blades with this hole.
Watch out for
- Never drill, grind or file a center hole to fit, and never fit a blade whose hole does not match your spindle or adapter.
- The 92-105 count is three per 48-inch cut on the John Deere decks Oregon lists, not a rule for every 48-inch deck.
This page describes a hole shape. It is not a fit list: use the blade's part number and your mower's model.
Questions
Which John Deere blades does the Oregon 92-105 replace?
Oregon lists AM137757, AM137758, AM141035, AM141036, GX21784, GX21785, GX21786 and GY20852. Confirm your model and deck.[3]
How many 92-105 blades go on a 48-inch deck?
Oregon says three blades for a 48-inch cut.[3]