8TEN Spindle for Cub Cadet MTD Craftsman Troy Bilt ZT1 ZTS1 46 Z5400 Z5450 Mustang Z46 46-Inch Deck 618-09395 618P09395

What It Is

This is a replacement spindle assembly for the 46-inch fabricated decks found on select Cub Cadet, MTD, Craftsman, and Troy-Bilt zero-turn mowers. It drives the mower blade and houses the bearings that allow the blade to spin freely.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: This spindle is designed for 46-inch fabricated decks only. It will not fit stamped decks or other deck sizes.
• Model series: Fits Cub Cadet ZT1, ZTS1, Z5400, Z5450; Troy-Bilt Mustang Z46; and Craftsman Z46 zero-turns with 46-inch fabricated decks.
• OEM cross-reference: Replaces OEM part numbers 618-09395, 618P09395, and 918-09395. If your original spindle has a different number, measure the bolt pattern (center-to-center) and the spindle shaft diameter (typically 3/4-inch or 1-inch) to confirm match.

Key Things to Know

• Build quality: 8TEN is an aftermarket brand. Most users report it’s comparable to OEM, but a few note slightly looser tolerances on the bearing fit.
• Installation difficulty: Moderate. You’ll need a socket set, wrenches, and a jack or lift to access the underside. Expect 30–60 minutes per spindle.
• Common gotcha: The spindle pulley may not align perfectly with the deck belt path on all decks. Check belt tension after installation and adjust if needed.
• Bearing longevity: Grease fittings are absent on this model. If you mow in dusty or wet conditions, bearings may wear faster than OEM with sealed units.

Should You Buy It

If you need a budget-friendly spindle for a 46-inch fabricated-deck ZT mower and are comfortable with a straightforward DIY swap, this 8TEN spindle is a solid choice. It’s not built for extreme commercial use, but for residential or light commercial cutting, it offers good value at half the price of OEM.