Skip to content
Deck Spindle Fits Ariens Gravely Zoom 42" - 50" Decks Replaces 51520900 Assembly
Deck Spindle Fits Ariens Gravely Zoom 42" - 50" Decks Replaces 51520900 Assembly – view 2
Deck Spindle Fits Ariens Gravely Zoom 42" - 50" Decks Replaces 51520900 Assembly
Deck Spindle Fits Ariens Gravely Zoom 42" - 50" Decks Replaces 51520900 Assembly – view 2

Deck Spindle Fits Ariens Gravely Zoom 42" - 50" Decks Replaces 51520900 Assembly

Save $ 4.50 Save $ 4.50
$ 74.97
$ 74.97 - $ 74.97
$ 74.97
$ 70.47
$ 70.47 - $ 70.47
$ 70.47
Aftermarket replacement part

Direct buying discount applied. Prices on our site are lower than our marketplace listings to reflect the absence of third-party platform fees.

The crossed-out price is our current listing for this item on those marketplaces — not a former flipmfg.com price.

Replaces OEM:

  • 51520900

Will this fit your machine?

Models this fits (34)

Show 18 more models

Not sure? Start a guided fitment text to 903-320-4519 — we'll verify for free.

Mention part 704023 in your text so we know which one you mean.

Availability:
in stock, ready to be shipped
Free standard shipping · contiguous U.S.
Estimated standard delivery: See delivery information at checkout

Our standard 3–7 business-day transit estimate applies to in-stock items after dispatch.

Delivery details

Standard shipping is free within the contiguous U.S. The estimated delivery range uses our standard 3–7 business-day transit time after dispatch, with weekends and U.S. postal holidays excluded. Delivery varies by destination. It is not a guaranteed delivery date.

Need it sooner? Expedited options and prices are available at checkout. Shipping policy

Shipments to Canada require additional shipping costs with extended delivery times.

Top Quality Store on Google View details
60-day returns Prepaid label — no restocking fee
Secure checkout Major cards, PayPal, Apple Pay, and Shop Pay

Before you order

Make sure it fits.

Match the number stamped on your old part to the numbers listed here, then check that your machine's model is on the list. Not sure? Text us a photo of the old part and we will check it for you.

Part information

Product details.

What the part is made of, how it installs, and other details for this listing. Use the numbers and model list above to make sure it fits your machine.

About this replacement part

This is an aftermarket deck spindle assembly for compatible Ariens and Gravely mower decks. It is part of the mower deck blade drive system, supporting the blade and pulley so the blade turns smoothly and stays properly located under the deck.

Built to match OEM

This spindle is made as a direct replacement for the original deck spindle assembly, with mounting points and shaft layout intended to match the factory setup. The assembly is built to fit the existing deck location and work with the related blade and pulley hardware without changing the deck structure.

Installation

Installation is a straightforward bolt-on repair for a DIY mechanic with common hand tools. Remove the belt tension, blade, and spindle mounting hardware, then install the replacement spindle in the same position and tighten all hardware to the specifications in your mower service manual. No deck cutting or fabrication should be needed.

Aftermarket replacement part. Not affiliated with or endorsed by an original equipment manufacturer. Verify the listed part number, model, dimensions, and serial notes before ordering.

FLIP SKU 704023

Customer reviews

Reviews for this part.

Read verified feedback, installation notes, and customer photos from this exact listing.

Before you order

Three details beat a hundred guesses.

Use the information on this page to verify the part before checkout.

1

Match the stamped number

Compare the OEM number, replacement number, or FLIP SKU shown above.

2

Confirm model and serial range

Check the model list and any serial number notes in the product details.

3

Get help when something is unclear

Share the model, serial number, and a photo. A Texas-based team member will help.

Ask about this part Read the fitment guide →