Upgrade your workflow with this precision-engineered replacement designed for airless sprayer systems. The Graco 116776 delivers smooth operation and enhanced longevity even under demanding high-pressure filtration applications. Expertly crafted from durable materials, it maintains optimal performance for professional coatings and reduces wear on moving parts. Routine replacement of this critical component ensures consistent spray quality, minimizes downtime, and protects expensive pump assemblies. Technicians trust this OEM solution for its reliability in industrial and commercial painting environments.
Whether servicing a rental fleet or upgrading a production line, this part simplifies maintenance and maximizes uptime. Compatible with a wide range of Graco sprayer models, it delivers stable performance and consistent results across diverse applications. The Bearing rod design features tight tolerances and exceptional load support, making it the preferred choice for professionals demanding durability and precision in every spray cycle.
The Graco 116776 Bearing, Rod is engineered to meet the rigorous demands of industrial paint circulation and sealing assemblies. This OEM replacement component integrates seamlessly into piston pumps and spray modules, delivering smooth reciprocation under continuous load. With a compact footprint of 1.75 in length and 1.85 in width, the rod bearing maintains tight tolerances that reduce unwanted lateral play, minimize chatter, and prolong overall service intervals. Its robust design enhances spray consistency, critical for finish quality and part-to-part repeatability in high-volume finishing lines where precision and downtime avoidance are paramount.
Constructed from heat-treated stainless steel races and a custom-engineered polymer insert, the 116776 Bearing, Rod is rated for continuous operating temperatures up to 200 °F. The bearing assembly exhibits superior corrosion resistance in waterborne, solvent, and epoxide-based spray media. When deployed in an airless sprayer platform, this rod bearing dramatically improves dynamic response and stroke repeatability, enabling uniform film thickness across wide-spray patterns and reducing over-application waste. Its volumetric profile of 0.001 ft³ ensures minimal dead volume, contributing to enhanced pump efficiency and faster color changes in multi-head spray systems.
Design details include a precision-ground outer diameter with ABEC-5 tolerance levels, providing radial run-out of less than 0.0005 in. The internal sliding surface is polished to a 16 μin finish, optimizing fluid film formation and lowering coefficient of friction. Performance testing under cyclical fatigue loads demonstrates an L10 life exceeding 1 million cycles at 5 kN radial load. This translates into reliable operation in high-speed reciprocating applications, such as plural-component proportioners and high-output diaphragm pumps, where continuous duty is required for professional-grade finishes.
In applications requiring ultra-clean material handling—such as two-component polyurethane coatings or waterborne acrylics—the 116776 Bearing, Rod works in concert with advanced high-pressure filtration media. By maintaining precise alignment between the reciprocating rod and the seal face, it avoids abrasive ingress that can abrade the seal interface and compromise fluid integrity. Engineers have reported up to a 30 % improvement in mean time between maintenance intervals when installing this bearing in combination with 10 μm filter cartridges and high-performance packings.
Installation is straightforward: slide the bearing onto the polished piston rod, align the bearing flange with the mounting bore, and secure with the specified fastener torque of 10 ft-lbs. The flange thickness of 0.12 in ensures a flush fit against the housing shoulder, preventing axial play without risk of binding. During routine overhaul, inspection criteria focus on wear track depth, lubrication retention profile, and seal face flatness. Proper greasing intervals—every 500 hours of operation under standard loading—help to sustain optimal frictional characteristics and extend both pump and seal lifespan. This attention to maintenance detail further enhances seal longevity and pump life.
Suitable for both new installations and field service operations, the Graco 116776 Bearing, Rod is recommended for use in automated spray booths, plural-component dispensers, and continuous-coating lines. Its proven performance in abrasive and high-cycle environments makes it an indispensable component for system integrators seeking to optimize throughput and minimize unplanned downtime. By combining high-grade materials, precision machining, and rigorous testing, this rod bearing upholds the exacting standards required for delivering flawless finishes with minimal operational interruption.
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