UDC Parts Lawn Mower Blades for Husqvarna 532173921 - 48" 3-Pack, OEM-fit 5-Point Star

These are three UDC Parts replacement lawn mower blades engineered to fit 48" decks using Husqvarna OEM numbers like 532173921 and compatible Craftsman/Poulan models.

When your mower needs new cutting edges, this 3-pack from UDC Parts gives you an economical way to restore cutting performance for many 48-inch riding mower decks. Each blade is manufactured to match the critical dimensions and center hole configuration of the original equipment, making installation straightforward for common Husqvarna and Craftsman models. Below you'll find clear answers to the most common buyer questions about fit, dimensions, installation, and who should consider these blades.

How do I know these blades will fit my mower?

Confirming fit starts with checking the mower’s OEM part number and deck size. These blades are specified to replace Husqvarna part 532173921 and several cross-reference numbers; they use the five-point star center hole common to many 48" decks. If your mower lists any of the compatible models or part numbers in the description, these blades are likely a match.

• Compatible with Husqvarna OEM 532173921 and related numbers listed in the product details.
• Designed for 48" decks and models such as YTH2348, GTH2548, YTH2448 and many others.
• Center hole: 5-point star; measure your spindle or existing blade to confirm.
• Important: double-check your mower’s full model/configuration before ordering.

What are the exact blade dimensions and mounting details?

Dimensions matter for safe, balanced cutting and correct clearance beneath the deck. Each UDC blade mirrors the specified diagonal length, width, lift height and cutting edge length used by the OEM part to maintain deck airflow and mulching/mowing performance.

• Diagonal length: 16-5/8" (measured tip to tip).
• Width: 2-1/2"; air lift height: 1"; cutting edge length: 4-1/64".
• Center mounting: 5-point star hole designed to fit the listed spindles.
• Made to fit a 48" deck — ensure blade clearance in your deck housing.

How do these replacement blades compare to OEM parts?

UDC Parts blades are manufactured to the same functional specifications as the referenced OEM numbers, providing similar cutting geometry, lift profile and mounting compatibility. They are a cost-effective replacement suitable for routine blade refresh to restore cut quality and deck performance.

• Matches dimensions and mounting pattern of Husqvarna 532173921 and associated numbers.
• Offers the same air-lift shape to maintain proper grass lift and discharge.
• Sold in a three-blade pack for balanced installation across a 48" deck.
• Ideal for replacing worn or damaged blades when sharp cutting edges are needed.

Can I install these blades myself and what safety checks are recommended?

Blade replacement is a straightforward maintenance task for many mechanically inclined owners, but it requires proper safety steps and the correct hardware. Use the factory fasteners and torque specs where provided, and check for blade balance and clearance after installation.

• Disconnect spark plug before working under the deck to prevent accidental starts.
• Use recommended bolts, washers and torque settings from your mower manual.
• Balance blades after sharpening or replacement to reduce vibration and wear.
• Inspect deck and spindle for damage; replace worn spindles or hardware as needed.

Who this product is for: This UDC Parts 3-pack is intended for owners of 48-inch Husqvarna, Craftsman, Poulan and compatible riding mowers who need a precise, budget-friendly blade replacement. It's suitable for homeowners doing routine maintenance, small-scale landscapers maintaining a fleet of similar machines, and anyone who has confirmed their model or OEM part number matches the cross-reference list. If you’re unsure about fit, check your mower’s exact model/configuration and compare the center hole and blade length measurements before purchase.