Batch Hardness TestedExporting to 30+ countriesHS Code 820840000

Replaces OEM GX21784 (Toothed Mulching)

Factory code GX21784 — made in our own plant from 65Mn manganese steel, heat-treated cutting edge, batch hardness tested at 45–50 HRC.

Replaces OEMGX21784
Deck size48"
Center hole7-point star
Thickness5/32"
Pack optionsPer carton
Min. order300 pcs
Replacement mower blade for OEM GX21784
Detail photo 2 for OEM GX21784
Detail photo 3 for OEM GX21784

All photos are of the actual part — including our production photo and reference shots from the OEM application. Brand and model names are for fitment reference only.

Specifications

Part Specification

Material65Mn manganese steel
Hardness45–50 HRC
Deck size48"
Center hole7-point star
Air lift1"
Blade typeToothed Mulching
ApplicationLawn tractor
Length17"
Width2-3/4"
Thickness5/32"
Inner boxPer OEM reference
CartonPer OEM reference
Min. order300 pcs / SKU
Cross-reference

Replaces these part numbers

GX21784GY20852AM137757AM141035
Fitment

Which machines it fits

Type your mower model below to confirm this blade fits — before you enquire.

24 of 24 models
D140E140LA145D160S170E170E160Z355ED155Z255LA130D150E150LA140LA155LA165S140S160X140X165X166X167Z245Z355
Notes for buyers

Fitting & compatibility notes

  • D140 Toothed Mulching Blades Replace number GX21784 GY20852 AM137757 AM141035
  • Mower Blades Compatible with 145 155C D140 D150 D155 D160 E140 E150 E160 E170 100 Series Tractor with 48-Inch Mower Deck
  • Mower Blades Compatible with LA130 LA140 LA145 LA155 LA165 Tractor (100 Series) with 48-Inch Mower Deck
  • Mower Blades Compatible with S140 S160 S170 X140 X165 X166 X167 Series Tractor;JD Z245 Z255 Z355E Z355 EZtrak Residential Zero Turn Mower
  • Notice:you do not need to remove the paint on the blade before using it.The paint is probably there to protect your hand when installing it and prevent blade rust.It's gone after a few minutes of moving.
Same deck size

Other blades for 48" decks

Buyers servicing mixed fleets usually order these together.

Need a Different Spec?

Send your sample, drawing or part number — quote within 48 hours, including tooling cost for new profiles.