Nitro 81XHH roller chain is a super heavy duty chain that is built with 5/16" thick plates! Thicker link plates coupled with solid rollers, solid bushings and quad staked pins provides you with an high-end chain that exceeds our competition. 81XHH chain is perfect for high to extreme shock load applications.
81XHH Roller Chain Dimensions
Inner Width (b1):1.062''
Roller Diameter (d1):0.905''
Overall Width (L):2.582"
Pin Diameter (d2):0.437''
Link Plate Height (h2):1.122''
Link Plate Thickness (T):0.312''
Average Tensile Strength:47,800 lbs
Max Working Load:7,200 lbs
No. Of Pitches/Links Per 10 Feet:46
No. Of Connecting Links Included:1
Chain Material:Carbon/Alloy Steel
Product Features Of Nitro™ 81Xhh Chain
Premium quality chain with improved features that results in longer lasting chain over many competitors.
Smoother operation between the chain & sprocket as well as better lubricant retention between the roller & bushing.
Will not distort under heavier shock loads that results in less stretch.
Quad Staked Pins
Able to withstand more frequent and higher shock loads.
5/16" Thick Link Plates
The 81XHH super heavy series chains are enhanced by using 5/16" thick link plates. The thickest plate available! This adds fatigue strength, allowing the chain to withstand higher & repeated shock loads.
Manufactured with solid cold-forged rollers for smoother contact with the sprocket teeth and to resist distorting under heavy loads.
Built with solid cold-forged bushings for superior wear resistance that results in service life 2x to 3x greater than split bushing chains. See the solid bushing advantage.
Quad Staked Pins
Pin ends are quad staked rather than the standard dual staked pins. Quad staking offers enhanced strength while enduring higher shock loads.
Chrome Plated Pins
The chrome plating has an extremely hard surface that has greater wear resisance over standard heat treated pins.
After assembly, all Nitro chains are pre-loaded to a minimum load required by the industry standard. Pre-loading seats the chain joint that eliminates any initial elongation in a new chain.
Pre-lubricated in a special formulated lubricant through a hot-dipping process. This process is critical to ensure the lubricant penetrates and thoroughly coats the internals of the chain. The special lubricant offers better retention (less spin-out) and improved wear protection over chains that are cold-dipped.
Advanced heat treatment is applied to achieve optimum hardness for strength and wear resistance.
To combat fatigue failure from repetitive loads & wear, a compressive stress layer is added through shot peening.