Cub Cadet 918-06977A Blade Spindle Assembly | 46" Deck Star Shaft with 6.9" Pulley

Cub Cadet 918-06977A Blade Spindle Assembly for 46" Mower Decks

The Cub Cadet 918-06977A Spindle Assembly is a genuine replacement blade spindle assembly for select 46" Cub Cadet, MTD, Troy-Bilt, and CRAFTSMAN mower decks. This spindle assembly is designed for 46" mower decks with a star blade shaft and includes the installed 6.9" diameter pulley.

This part is commonly searched as a Cub Cadet XT1 LT46 spindle assembly, XT2 LX46 blade spindle, 46 inch deck spindle, MTD 918-06977A spindle, star shaft spindle assembly, or Troy-Bilt TB2246 spindle.

This assembly replaces 618-06977, 618-06977A, and 918-06977. Mounting screws are not included. Always verify your full model number, serial number, deck size, spindle shaft style, pulley size, original spindle number, and parts diagram before ordering.

Product Details

Compatible Cub Cadet Model References

This is a where-used reference list. Cub Cadet 918-06977A fits select 46" mower decks with a star shaft spindle setup. Always confirm your exact model and serial number with the parts lookup before ordering.

Compatible Troy-Bilt Model References

Compatible CRAFTSMAN / MTD Model References

Important: Fitment should always be confirmed with a parts lookup. This spindle fits many 46" MTD, Cub Cadet, Troy-Bilt, and CRAFTSMAN decks, but spindle assemblies can vary by deck shell, pulley setup, shaft style, and production year.

Key Features

• Genuine Cub Cadet / MTD blade spindle assembly
• Part number 918-06977A
• Replaces 618-06977, 618-06977A, and 918-06977
• Deck spindle assembly for select 46" mower decks
• Designed for star shaft blade mounting applications
• Includes 6.9" diameter pulley
• Mounting screws are not included
• Fits many MTD riders and RZT-style 46" deck applications where specified
• Common replacement for Cub Cadet XT1 LT46 and XT2 LX46 deck spindle applications
• Factory-correct replacement when listed in your parts diagram

Why Choose an OEM Cub Cadet Spindle Assembly?

A mower deck spindle must match the correct deck shell, shaft style, pulley diameter, blade mounting pattern, belt alignment, and hardware setup. Using the wrong spindle can cause blade wobble, belt tracking problems, uneven cutting, vibration, premature bearing failure, or unsafe blade operation.

Cub Cadet / MTD 918-06977A is built for compatible 46" deck applications with a star shaft and 6.9" pulley. When your parts diagram lists 918-06977A, this is the correct spindle assembly for that location.

• Correct OEM fit when specified by the parts diagram
• Designed for compatible 46" mower deck spindle locations
• Includes pulley for easier replacement
• Helps restore proper blade support and rotation
• Helps maintain deck belt alignment and cut quality
• Better fitment confidence than universal spindle assemblies

When to Replace a Blade Spindle Assembly

Replace the spindle assembly if the spindle bearings are noisy, rough, loose, seized, or if the shaft, pulley, or blade mounting area is damaged. A failing spindle can quickly damage belts, blades, pulleys, and the mower deck.

• Spindle makes grinding, squealing, or rumbling noise
• Blade has wobble or excessive movement
• Pulley is loose, bent, cracked, or wobbling
• Deck vibrates when blades are engaged
• Cut quality is uneven even with sharp blades
• Deck belt wears quickly or jumps off
• Star shaft or blade mounting area is worn or damaged
• Your parts diagram lists 918-06977A for your mower

Important Fitment Notes

• This listing is for Cub Cadet / MTD part number 918-06977A
• Designed for select 46" mower decks with star shaft blade mounting
• Includes 6.9" pulley
• Does not include mounting screws
• Verify your original spindle part number before ordering
• Confirm your deck uses the star shaft blade mount
• Confirm your deck uses the same pulley diameter and belt routing
• Do not order by deck size alone
• Inspect blade bolts, mounting screws, deck belt, idler pulleys, spindle pulleys, and blades during replacement

Pre-Purchase Checklist

Before ordering Cub Cadet 918-06977A, confirm:

• Your original spindle part number matches 918-06977A, 918-06977, 618-06977A, or 618-06977
• Your mower has a compatible 46" deck
• Your deck uses a star shaft spindle
• Your spindle assembly uses a 6.9" diameter pulley
• Your mounting screws are reusable or ordered separately
• Your full model number and serial number match the parts diagram
• Your blade, belt, pulley, and deck shell are in serviceable condition

Installation and Service Notes

Spindle replacement should be performed with the mower parked on level ground, key removed, parking brake engaged, blades disengaged, and the spark plug wire disconnected or battery disconnected where applicable. Wear gloves when handling mower blades.

• Take a photo of belt routing before removing the deck belt
• Remove the blade carefully and inspect the blade bolt and washer
• Inspect the deck shell around the spindle mounting area for cracks or elongated holes
• Use the correct mounting screws or replacement hardware for your deck
• Install the spindle in the same orientation shown in the parts diagram
• Make sure the belt is routed correctly around the pulley
• Torque blade and spindle hardware to the specification in your service manual
• Run the deck briefly and check for vibration, noise, or belt tracking issues before mowing

Part Number / Search Terms

Cub Cadet 918-06977A may also be searched as:

• Cub Cadet 918-06977A
• 91806977A
• MTD 918-06977A
• Cub Cadet spindle assembly
• Cub Cadet blade spindle assembly
• Cub Cadet XT1 LT46 spindle
• Cub Cadet XT1-LT46 spindle assembly
• Cub Cadet XT2 LX46 spindle
• Cub Cadet 46 inch deck spindle
• 46 inch mower deck spindle
• star shaft spindle assembly
• 6.9 inch pulley spindle
• 918-06977 spindle
• 618-06977A spindle
• 618-06977 spindle
• Troy-Bilt TB2246 spindle
• Troy-Bilt Super Bronco 46 spindle
• CRAFTSMAN T240 spindle
• CRAFTSMAN T2800 spindle
• CRAFTSMAN T3100 spindle
• CRAFTSMAN T8200 spindle
• MTD rider 46 deck spindle

Frequently Asked Questions

P&P Small Engines stocks genuine Cub Cadet, MTD, Troy-Bilt, and CRAFTSMAN spindle assemblies, deck belts, idler pulleys, mower blades, blade bolts, filters, oils, and OEM replacement parts for riding mowers and zero-turn mowers.