Spindle Assembly 43644 / 461663 for Scag SW32 32-Inch Deck

Overview

This aftermarket 43644 / 461663 spindle assembly is a replacement-style mower deck spindle assembly for select Scag SW32 32-inch walk-behind mower deck applications.

This listing is organized around the 43644 / 461663 spindle path. Available package options may include the spindle only, spindle with pulley, spindle with pulley and blade, or a 2-spindle / 2-pulley / 2-blade service package. Match your original spindle number, pulley number, blade number, mower model, deck size, and mounting setup before ordering.

Key Features

• Aftermarket replacement-style mower deck spindle assembly
• Product Type: Spindle Assembly
• Lead Part Numbers: 43644, 461663
• Also Replaces: 43294, 46631, 41001, 41007, 41008
• Common Deck Reference: 32 inch
• Optional Pulley Path: 48127 / 482744
• Optional Blade Path: 48110 / 481706 / 481710
• Available as spindle only, spindle with pulley, spindle with pulley and blade, or 2-spindle deck service package
• Organized by spindle or mandrel part number first to reduce fitment confusion

Compatible Brands & Model Series

This 43644 / 461663 spindle assembly is associated with select Scag 32-inch walk-behind mower deck applications using the listed spindle, pulley, and blade paths.

Supplier model references include:

• Scag SW32-13KH, 32-inch walk-behind mower
• Scag SW32-14FS, 32-inch walk-behind mower
• Scag SW32-15KA, 32-inch walk-behind mower
• Scag SW32-16FS, 32-inch walk-behind mower
• Scag 32-inch walk-behind mower deck applications using the listed spindle path

Verify your part numbers before ordering.

Replaces OEM Part Numbers

• Scag Spindle Housing / Assembly Path: 43644, 43294, 461663, 46631, 41001, 41007, 41008
• Scag Spindle Pulley Numbers: 48127, 482744
• Scag Blade Numbers: 48110, 481706, 481710

Aftermarket Cross-Reference Numbers

• Stens Spindle Cross-Reference: 285-597
• Rotary Spindle Cross-Reference: 9153
• Oregon Spindle Cross-Reference: 82-325

Available Package Options

Select the package option that matches the parts needed for your repair. Not every option includes every component listed below.

• Spindle Only Option: includes 1 replacement-style spindle assembly.
• Spindle Plus Pulley Option: includes 1 spindle assembly and 1 spindle pulley.
• Spindle, Pulley, and Blade Option: includes 1 spindle assembly, 1 spindle pulley, and 1 mower blade.
• 2-Spindle, 2-Pulley, and 2-Blade Option: includes 2 spindle assemblies, 2 spindle pulleys, and 2 mower blades for a larger 32-inch deck service package.

Optional Package Part Number Breakdown

Part numbers below may apply to available package options. Not every package includes every component listed. Select the option that matches the parts needed for your repair.

• Spindle / Mandrel Numbers: 43644, 43294, 461663, 46631, 41001, 41007, 41008
• Aftermarket Spindle Cross-References: 285-597, 9153, 82-325
• Spindle Pulley Numbers: 48127, 482744
• Blade Numbers: 48110, 481706, 481710

Single Spindle Specifications

• Spindle Housing Reference: 43644
• Spindle Assembly References: 461663, 46631
• Also Replaces: 43294, 41001, 41007, 41008
• Spindle Height Reference: 184 mm / 7.25 inches
• Spindle Width Reference: 132.3 mm / 5.20 inches
• Material Reference: Cast iron housing path
• Application Note: Confirm housing style, shaft setup, pulley style, blade hardware, and mounting pattern before ordering

Optional Package Component Specifications

Spindle Pulley Specifications

• Spindle Pulley Numbers: 48127, 482744
• Pulley Outer Diameter Reference: 5.75 inches
• Pulley Style: Taper-bore spindle pulley path
• Hardware Note: Taper hub or spacer hardware is not included unless shown in the selected option image or stated in the package contents.

Blade Specifications

• Blade Numbers: 48110, 481706, 481710
• Blade Length: 16-1/2 inches
• Blade Width: 3 inches
• Blade Thickness: 0.204 inch
• Center Hole: 5/8 inch
• Deck Size Reference: 32 inch when used as a 2-blade package

What’s Included

• Spindle Only Option: 1 aftermarket replacement-style spindle assembly
• Spindle Plus Pulley Option: 1 spindle assembly and 1 spindle pulley
• Spindle, Pulley, and Blade Option: 1 spindle assembly, 1 spindle pulley, and 1 mower blade
• 2-Spindle, 2-Pulley, and 2-Blade Option: 2 spindle assemblies, 2 spindle pulleys, and 2 mower blades
• Use the selected variant title and product images to confirm exact package contents before checkout

Common Symptoms / When to Replace

• Mower deck spindle is noisy, loose, seized, or wobbling
• Blade has excessive play at the spindle shaft
• Deck vibration increases during blade engagement
• Spindle pulley is worn, bent, damaged, or no longer tracking the belt correctly
• Blade is bent, worn, dull, or cutting unevenly
• Original spindle, pulley, or blade number matches one of the listed replacement paths

Quick Ship Fulfillment

This item may ship directly from one of our trusted U.S. distribution partners to help reduce transit time. Packaging, labeling, or warehouse origin may vary, but the part will match the replacement numbers, fitment notes, and specifications shown in this listing.

Why Buy From PTO Direct USA

• Fitment-first product organization by replacement part-number path
• Clear spindle, pulley, and blade references for package variants
• Single-spindle and 2-spindle service options for Scag 32-inch deck repairs
• U.S.-focused fulfillment options for faster delivery when available

Need a Custom Package?

Need a different combination of parts? Email us the part type and part numbers you need, such as spindle assemblies, blades, belts, pulleys, reinforcement rings, bearings, or hardware. We can review the part-number path and quote a custom package when available.

FAQ

Is this an OEM Scag spindle assembly?

No. This is an aftermarket replacement-style spindle assembly intended to replace the listed Scag part-number path when the physical fitment details match.

What are the lead part numbers for this listing?

The main spindle path uses 43644 and 461663. This listing also references 43294, 46631, 41001, 41007, and 41008.

Does every option include the pulley and blade?

No. Package contents vary by selected option. Choose the spindle-only option, spindle-plus-pulley option, spindle-pulley-blade option, or 2-spindle / 2-pulley / 2-blade option based on the parts needed for your repair.

Are 48127 and 482744 spindle numbers?

No. 48127 and 482744 are spindle pulley numbers and should stay in the pulley bucket.

Are 48110, 481706, and 481710 spindle numbers?

No. Those are mower blade numbers used in the 16-1/2 inch Scag blade path.

Can I order by deck size only?

No. Deck size alone is not enough. Match the original spindle number first, then confirm pulley number, blade number, mower model, deck layout, shaft setup, blade center hole, and mounting pattern before ordering.