4" × 3/4" Aluminum Sheave with 5/8" Oilite® Bronze Bushing – Made in USA

Reliable Pulley for Runabout, Pontoon & Mid-Duty Boat-Lift Systems

Enhance your mid-size boat lift with our 4" × 3/4" aluminum sheave, manufactured in the USA. The 5/8" Oilite® bronze bushing provides low-friction performance and pairs with common 5/8" axle bolts used on runabout and pontoon cradles.

Key Features

• Made in USA Quality: Precision-machined and inspected for flawless rotation.
• 4" Diameter × 3/4" Width: Fits standard mid-duty pulley brackets.
• 5/8" Borehole: Matches 5/8" axle bolts—common on 4–6 K lb lifts.
• Oilite® Bronze Bushing: Self-lubricating, long-life insert fights galling.
• Marine-Grade Aluminum: Lightweight, corrosion-proof alloy stands up to salt.
• Cable Capacity: Up to 5/16" (7 × 19) aircraft cable.

Product Description

Built for Mid-Weight Craft: Ideal for 18-21′ bow-riders, pontoons and bay boats that need a robust yet efficient sheave.

Simple Retrofit: Slides onto 5/8" axle hardware without bracket mods and seats perfectly in 7/8" pulley slots.

Quiet Cable Travel: Bronze bushing damps vibration and extends cable life.

Specifications

• Outside Diameter: 4"
• Face Width: 3/4"
• Bore Diameter: 5/8"
• Bushing: Oilite® bronze
• Cable Size: Up to 5/16"
• Material: Marine-grade aluminum
• Origin: Made in USA
• Hardware: Axle bolt/pin sold separately

Why Choose This Sheave?

American Craftsmanship: Domestic machining for dependable quality.
Corrosion-Resistant Design: Aluminum & bronze combo thrives in saltwater.
Right-Sized for 4–6 K Lifts: No unnecessary weight—just smooth power transfer.

Order Yours Today!

Give your mid-size boat lift quieter, longer-lasting pulley action. Order now and benefit from fast U.S. shipping and Monster Bolts’ top-tier support.

✔️ Proudly Made in USA ✔️ Preferred by marina pros & DIY boaters