USA-Made 316 Stainless Steel Cradle Compounding Kit (4-Pack) – 4" × 3/4" Sheaves & 3/4"-10 × 3-1/2" Axle Bolts

Convert Straight-Line Cable Systems to High-Capacity Compound Lifts

Transform your boat-lift from a straight-line setup into a higher-capacity compound system with our 316 Stainless Compounding Kit. Each kit contains four 4" diameter × 3/4" wide aluminum sheaves manufactured in the United States with Oilite® bronze bushings, plus matching 3/4"-10 × 3-1/2" axle bolts precision-machined in the USA and equipped with built-in zerk grease fittings. All included hardware is A4 (316) marine-grade stainless for maximum corrosion resistance in saltwater environments.

Load Rating: Rated for up to 8,000 lbs per complete kit (set of four sheaves in a typical compound configuration).*

Key Features

• Kit Rated to 8,000 lbs: Designed for 8K (or similarly rated) aluminum cradle systems using a four-sheave compound layout.*
• Made / Machined in the USA (Where Noted): Sheaves are U.S.-manufactured; axle bolts are machined in the USA for precise fit.
• Complete Compounding Kit: 4 sheaves, 4 axle bolts (zerk grease fit), 4 lock washers, 4 hex nuts—matched for easy install.
• 316 (A4) Stainless Hardware: Outperforms 18-8 in salt, sun & moisture, ensuring long-term reliability.
• Built-In Zerk Grease Fittings: Quick lubrication extends service life and keeps lifts quiet.
• Oilite® Bronze Bushings: Self-lubricating inserts provide smooth cable travel and minimize wear.

Product Description

Upgrade Your Lift—American Quality:
This kit streamlines the switch to compound cabling, boosting capacity and reducing strain. U.S.-made sheaves help maintain consistent groove tolerances, while U.S.-machined axle bolts deliver excellent thread fit and concentricity.

Marine-Grade Peace of Mind:
A4/316 stainless resists pitting and rust in saltwater. Integrated grease fittings make service simple, helping keep your lift in motion and out of the repair shop.

Universal Compatibility:
Designed to fit most 3/4" pulley brackets and cradle beams, ideal for side-mount, overhead, and pile-mount boat-lift systems— or any industrial application requiring rugged sheave assemblies.

Specifications

• Load Rating: Up to 8,000 lbs per complete kit (four-sheave compound configuration).*
• Sheaves (x4): Made in USA – 4" Ø × 3/4", aluminum, Oilite® bronze bushing
• Cable Capacity: Up to 5/16"
• Axle Bolts (x4): Machined in USA from imported blanks – 316 SS, 3/4"-10 × 3-1/2", built-in zerk fitting
• Lock Washers (x4) & Hex Nuts (x4): 316 SS, globally sourced to Monster Bolts specifications
• Recommended Use: Upgrading straight lifts to compound, dock/boat-lift assemblies

*Load rating provided for a typical four-sheave compound configuration. Actual capacity depends on lift design, cable condition/size, bracket alignment, installation, and maintenance. Kit assembled in Florida. Sheaves are U.S.-manufactured; axle bolts are machined in the USA from imported 316 stainless blanks; lock washers & nuts are globally sourced to ASTM/ISO specs.

Why Choose This Kit?

Built for 8K-class lifts: Designed for load distribution using a four-sheave compound layout.*
316 Stainless Reliability: Superior rust defense for saltwater installs.
Built-In Maintenance: Zerk fittings keep components greased without teardown.
All-in-One Convenience: Everything matched and ready—no piecemeal sourcing.

Order Yours Today!

Upgrade to a corrosion-proof compound lift with our 316 Stainless Cradle Compounding Kit. Buy now and get fast U.S. shipping plus Monster Bolts’ expert support.

✔️ USA-made sheaves + USA-machined axle bolts ✔️ Trusted by marine professionals