46 Inch Deck Spindle Assembly Fit for Craftsman T1700 T1500 T1600 T1900 T135 T150 T140 Huskee LT4600 Bronco Horse XP MTD Troy Bilt TB46 Lawn Mower Replaces 618-06989 918-06989

What It Is

This is a replacement spindle assembly for the 46-inch cutting deck found on Craftsman T-series, Huskee, Bronco, and select MTD/Troy-Bilt lawn tractors. It houses the bearing and pulley that spin the blade; you need one for each blade on the deck.

Fitment & Compatibility

Before buying, confirm three things:

• Deck size: This spindle is for a 46-inch deck only. Not for 42-inch or 54-inch decks.
• Model series: Fits Craftsman T1700, T1500, T1600, T1900, T135, T150, T140; Huskee LT4600, Bronco, Horse XP; MTD and Troy-Bilt TB46. If your tractor has a 46-inch deck from one of these brands, it likely fits.
• OEM numbers: Replaces OEM part numbers 618-06989 and 918-06989. Check your old spindle for these numbers or verify in your manual.
• Measurements: Housing is approximately 4.5 inches tall, with a 5/8-inch hex shaft and a 3.5-inch pulley bolt pattern. Measure your old spindle to confirm.

Key Things to Know

• Quality: This is an aftermarket spindle. At $27.99, it’s significantly cheaper than OEM ($45–$60). Reviews (4.9/5, 38 ratings) suggest it holds up well for residential use, but may not be as durable as OEM for heavy commercial mowing.
• Installation difficulty: Moderate. Requires removing the deck, unbolting the old spindle (3 bolts), transferring the pulley, and reinstalling. Basic hand tools (wrenches, socket set) and a jack or blocks to lift the mower are needed.
• Common gotcha: The pulley is not included. You must reuse your existing pulley. Check that the pulley’s center hole and bolt pattern match the new spindle’s hub before reassembling.
• Bearing type: Sealed ball bearings—no greasing required. If the old spindle had a grease fitting, this one does not, but sealed bearings last well in residential use.

Should You Buy It

Buy this if you need a budget-friendly replacement for a worn or noisy spindle on a residential 46-inch deck and you’re comfortable with a moderate DIY install. It’s not for commercial use, but for the price and strong reviews, it’s a solid value for weekend mowing.