Husqvarna 532121798 50-Inch Standard Lift Blade – Genuine OEM Replacement Mower Blade

Part Number: 532121798
Category: Lawn Tractor Blades, Cutting Deck & Replacement Mower Parts
Type: 50-Inch Deck Standard Lift Blade – Genuine OEM Replacement Mower Blade

The Husqvarna 532121798 Standard Lift Blade is a genuine OEM replacement mower blade designed for select Husqvarna lawn tractors and compatible 50-inch cutting deck applications.

Product Specifications

• Part Number: 532121798
• Manufacturer: Husqvarna
• Product Type: Lawn Mower Blade
• OEM Description: Blade, 50" Standard Lift
• Blade Style: Standard Lift
• Deck Size Application: 50"
• Individual Blade Length: Approximately 17-3/8"
• Center Hole: 3/8"
• Component Type: Mower Deck Cutting Component
• Application: Lawn Tractor / Riding Lawn Mower
• Compatible Brand: Husqvarna
• Additional Applications: Select Craftsman / AYP / Poulan / Dixon Equipment
• Documented Husqvarna Model: GT180
• Blades Required for Applicable 50" Deck: 3
• System: Mower Deck / Cutting System
• Replacement Type: Direct OEM Replacement
• OEM Status: Genuine Husqvarna OEM Part
• Condition: New
• Quantity: 1 Blade
• Previous Part Number: 121798X
• Part Number Reference: 532121798
• Alternate Number Format: 532 12 17-98

Sears PartsDirect identifies 532121798 as a genuine OEM 50-inch deck blade and confirms that it replaces 121798X.

Features & Benefits

• Genuine Husqvarna OEM replacement mower blade
• Factory-designated 50" Standard Lift Blade
• Designed for select 50-inch lawn tractor cutting decks
• Standard-lift blade profile
• Helps provide consistent grass cutting and discharge
• Designed to maintain proper airflow beneath compatible mower decks
• Approximately 17-3/8-inch individual blade length
• Designed for the applicable factory spindle configuration
• Helps restore cutting performance when replacing worn blades
• Manufactured for proper fit within compatible mower decks
• Maintains the equipment's original cutting-system configuration
• Suitable for routine lawn tractor maintenance
• Ideal replacement for dull, worn, bent, chipped, cracked, or damaged blades
• Replaces earlier 121798X blade
• Direct replacement for equipment specifying 532121798
• Genuine OEM component rather than an unspecified universal mower blade

Documented Applications

The Husqvarna 532121798 Standard Lift Blade is documented for select Husqvarna and Husqvarna-produced lawn tractor platforms.

Applications include:

• Husqvarna GT180 Garden Tractor
• Select Husqvarna 50-inch cutting decks
• Select Craftsman riding mowers and lawn tractors
• Select AYP-manufactured equipment
• Select Poulan equipment
• Select Dixon equipment requiring the same OEM blade number
• 50-inch three-blade cutting deck assemblies
• Standard-lift mowing applications
• OEM replacement applications requiring 532121798

PartsTree specifically identifies 532121798 as a “Mower Blade, 50" Standard Lift” for multiple Husqvarna GT180 configurations.

Sears also documents the blade for multiple Craftsman 917-series riding mower and lawn tractor models.

50-Inch Deck Configuration

The 50-inch designation does not mean that this individual blade measures 50 inches long. Instead, it identifies the compatible mower deck cutting width.

For documented GT180 50-inch deck applications:

• Individual Blade Length: Approximately 17-3/8"
• Center Hole: 3/8"
• Deck Size: 50"
• Blades Required: 3

Three blades are used together to provide coverage across the applicable 50-inch mower deck.

This listing is for one blade unless otherwise specified, so a complete replacement set for an applicable three-blade deck requires three individual blades.

Standard Lift Blade Design

The 532121798 uses a standard-lift cutting profile intended to provide a balance of cutting and airflow for compatible mower decks.

Standard-lift blades are suitable for general mowing applications where the mower's original cutting system specifies this blade style. The raised portion of the blade helps generate airflow beneath the deck to move grass clippings toward the discharge area while maintaining the equipment's intended cutting characteristics.

For best results, use the blade only on mower decks specifically designed for 532121798 or an approved superseded/cross-referenced part number.

Replacement Part Numbers

The Husqvarna 532121798 is associated with or replaces several blade numbers depending on the equipment manufacturer and parts catalog, including:

• 121798
• 121798X
• 532121798
• 532-121798
• 532-12-17-98

Sears specifically confirms that 121798X was replaced by 532121798.

Some aftermarket cross-reference catalogs also associate 127841 / 532127841 with the same GT180 50-inch deck blade application; verify against your exact model before using an alternate number.

Important Notes

• Verify compatibility with your exact Husqvarna mower model, product number, serial number, cutting deck size, spindle configuration, and production revision before ordering.
• Husqvarna parts listings identify 532121798 as “Blade 50 Standard Lift.”
• The 50-inch designation refers to the cutting deck, not the individual blade length.
• Documented replacement specifications list the individual blade at approximately 17-3/8 inches long with a 3/8-inch center hole.
• Applicable 50-inch deck configurations use three blades.
• This listing is for one blade unless otherwise specified.
• Do not assume three blades are included simply because the mower deck requires three.
• Match part number 532121798 directly with your equipment's illustrated parts diagram before ordering.
• Do not select a mower blade based solely on deck size or approximate blade length.
• Mower blades can differ in length, width, thickness, center-hole configuration, lift profile, offset, cutting geometry, and rotation requirements.
• Inspect all blades on a multi-blade deck when replacing one damaged or excessively worn blade.
• For consistent cutting performance, blades installed on the same deck should be in comparable serviceable condition.
• Inspect the blade spindle, spindle bearings, mounting hardware, washers, adapters, and surrounding mower deck components when replacing a blade.
• If the original blade was damaged by striking a rock, stump, curb, root, or other solid object, inspect the spindle and mower deck for corresponding damage.
• Never straighten and reuse a severely bent mower blade.
• Replace any blade that is cracked, deeply chipped, excessively worn, or otherwise structurally compromised.
• When sharpening a serviceable blade, maintain the original cutting geometry and ensure the blade remains properly balanced.
• An improperly balanced blade can cause excessive vibration and accelerate wear on spindle bearings and mower deck components.
• Install the blade in the correct factory orientation.
• Make sure the blade is fully seated against the applicable spindle or mounting surface.
• Install washers and mounting hardware in the correct sequence.
• Tighten blade mounting hardware according to the mower manufacturer's specified torque.
• Before operation, verify adequate clearance between all blades and surrounding deck components.
• Never operate the mower with loose, damaged, incorrectly installed, or improperly balanced blades.
• Shut off the mower, engage the parking brake, remove the ignition key, disconnect the spark plug or battery where applicable, and wait for all moving components to stop before servicing the cutting deck.
• Wear heavy protective gloves when handling mower blades.
• This listing is for one Husqvarna 532121798 50-Inch Deck Standard Lift Blade only unless otherwise specified. Blade bolts, washers, spindles, adapters, belts, pulleys, and other mower deck components are sold separately.
• Match part number 532121798 with your equipment's illustrated parts diagram or OEM documentation before ordering to ensure proper fitment.