Description

Product Overview

The GE V7768-320000(also listed as V7768320000 and 3509301007768)is a high-precision angular contact ball bearing engineered for demanding rotational applications in industrial,aerospace,and power generation equipment.Manufactured to exacting standards by General Electric(GE),this bearing is specifically designed for use in high-speed rotating machinery such as gas turbine spools,auxiliary power units(APUs),industrial motors,and precision machine tool spindles where reliability,rigidity,and thermal stability are critical.

As a precision ABEC-7 rated bearing,the GE V7768-320000 features tightly controlled tolerances,superior surface finish,and optimized internal geometry to minimize vibration and heat generation under high rotational speeds.It is typically configured in a duplex pair(back-to-back or face-to-face arrangement)to handle combined radial and axial loads,providing enhanced stiffness and positional accuracy—essential for maintaining performance in dynamic environments.The bearing’s design supports high thrust capacity in one direction while maintaining low friction and consistent running torque.

This bearing is commonly found in GE Aviation and GE Power systems,where it supports critical shafts in compressors,generators,and motor-driven assemblies.Its robust construction and material selection—typically using high-purity chrome steel(SAE 52100)with through-hardening—ensure long service life even under continuous operation and thermal cycling.The GE V7768-320000 is often preloaded at the factory and may be supplied as part of a matched set to ensure optimal performance when installed in pairs or stacks.

Due to its specialized application,the GE V7768-320000 is not a general-purpose bearing but a mission-critical component requiring precise installation,alignment,and lubrication.It plays a vital role in maintaining rotor dynamics,minimizing wear on adjacent components,and ensuring the overall integrity of rotating systems.As an OEM part,it is designed to meet or exceed original equipment specifications,ensuring compatibility and performance in both new builds and repair overhauls.

Technical Specifications

Parameter Specification

Bearing Model GE V7768-320000

Alternate Part Numbers V7768320000,3509301007768

Type Angular Contact Ball Bearing(Duplex Pair)

Bore Diameter 70 mm

Outer Diameter 125 mm

Width(Thickness)24 mm

Precision Rating ABEC-7(ISO P4)

Contact Angle 15°or 25°(depending on configuration)

Dynamic Load Rating(C)~44,000 N(typical)

Static Load Rating(C₀)~36,000 N(typical)

Limiting Speed(Grease)Up to 12,000 rpm

Limiting Speed(Oil)Up to 18,000 rpm

Material High-carbon chromium steel(SAE 52100)

Cage Type Brass or Phenolic(depending on application)

Preload Light,Medium,or Heavy(matched set)

Sealing Open or with metal shields(non-contact)

Lubrication Requires high-speed grease or oil mist

Mounting Configuration Back-to-Back(DB),Face-to-Face(DF),or Tandem

Standards Compliance ISO 15,ISO 1132-1,ABEC-7,GE-GEK-32148

Main Features and Advantages

High-Speed Performance:The GE V7768-320000 is engineered for operation at elevated speeds,making it ideal for turbine engines,high-RPM motors,and spindle drives.Its optimized internal clearance and low moment of inertia allow for smooth rotation with minimal heat build-up.

Precision and Rigidity:With ABEC-7(ISO P4)precision,the bearing ensures minimal runout and vibration,contributing to superior machining accuracy in CNC applications and stable rotor dynamics in turbomachinery.The duplex configuration increases system stiffness,reducing deflection under load.

Enhanced Load Capacity:Designed to support significant axial(thrust)loads in one direction while maintaining radial stability,the GE V7768-320000 is well-suited for applications with unidirectional thrust forces,such as compressor stages and generator rotors.

Thermal Stability:The bearing’s material and heat treatment process provide excellent dimensional stability across a wide temperature range,ensuring consistent performance during thermal transients common in start-stop cycles of industrial and aerospace equipment.

OEM Reliability:As a genuine GE component,the V7768-320000 is manufactured to meet the exact specifications of original equipment,ensuring compatibility,longevity,and adherence to safety and performance standards in critical systems.

Matched Sets for Optimal Performance:Supplied in pre-matched pairs with controlled preload,the bearing eliminates the need for field adjustment,reducing installation errors and ensuring balanced load distribution.

Application Field

The GE V7768-320000 is primarily used in aerospace and power generation platforms,particularly within GE Aviation engines and GE Power turbines.It is commonly installed in:

Gas Turbine Engines:Supporting compressor and accessory drive shafts in commercial and military jet engines where high-speed reliability is paramount.

Auxiliary Power Units(APUs):Ensuring stable operation of onboard power generation systems in aircraft.

Industrial Gas Turbines:Used in power plants and oil&gas facilities for generator drive trains and compressor sections.

High-Speed Electric Motors:Found in precision motors used in machine tools,centrifuges,and test rigs requiring minimal vibration.

CNC Machine Tool Spindles:Where high rigidity and rotational accuracy are required for milling,grinding,and drilling operations.

Pumps and Compressors:In high-pressure fluid systems where long bearing life and resistance to axial loading are essential.

Test Benches and Dynamometers:For simulating real-world conditions in engine and motor development.

Due to its specialized nature,the GE V7768-320000 is often replaced during scheduled overhauls or as part of a bearing cartridge rebuild rather than in standalone repairs.

Related Products

GE V7768-310000(3509301007767):A similar angular contact bearing with different preload or contact angle,often used in tandem with the V7768-320000 in multi-stage assemblies.

SKF 7214 BDF or FAG B7214-C-T-P4S:Aftermarket equivalents(not OEM)that may be used as replacements in non-critical or non-certified applications.

GE 3509301007769:Matched back-up bearing set for V7768-320000,often used in dual-bearing configurations.

GE Bearing Installation Tool Kit:Specialized tools for pressing,heating,and aligning the V7768-320000 without damaging raceways.

GE Lube Specification 3509301007770:High-speed grease recommended for use with the V7768-320000 to ensure optimal lubrication and thermal management.

GE Vibration Sensor 3509301007771:Often used in conjunction with the V7768-320000 for condition monitoring and predictive maintenance.

GE Shaft Sleeve 3509301007772:Precision sleeve used to maintain proper fit between the V7768-320000 and the rotating shaft.

GE Bearing Housing 3509301007773:Machined housing designed to support the V7768-320000 with proper alignment and cooling.

Installation and Maintenance

Installation Guidelines:

Always handle the GE V7768-320000 in a clean environment to prevent contamination.

Use proper bearing installation tools—never hammer directly on the bearing.

Heat the inner ring using an induction heater(not exceeding 120°C)for interference fits.

Ensure shaft and housing tolerances are within GE specifications(typically H7 for housing,k6 for shaft).

Install matched pairs according to the marked orientation(DB,DF,or DT).

Apply the correct type and quantity of high-speed lubricant per GE specifications.

Maintenance Recommendations:

Monitor vibration and temperature trends using condition monitoring systems.

Inspect for signs of brinelling,spalling,or discoloration during disassembly.

Replace in matched pairs—even if only one bearing shows wear.

Avoid mixing bearings from different batches or manufacturers.

Follow OEM overhaul intervals;typical life expectancy is 20,000–30,000 hours under normal operating conditions.

Store unused bearings in original packaging,in a dry,temperature-controlled environment.

Product Guarantee

The GE V7768-320000 is manufactured under strict quality control processes and is backed by GE’s commitment to reliability and performance in critical rotating equipment.We guarantee that each bearing meets or exceeds the dimensional,material,and performance standards defined in GE engineering specifications.As an OEM component,it is designed for seamless integration into GE systems,ensuring operational safety,reduced downtime,and compliance with regulatory requirements.

Our support includes access to technical documentation,application engineering,and global logistics for fast delivery.We recommend using only genuine GE V7768-320000 bearings in mission-critical applications to maintain system integrity and warranty coverage.By choosing this bearing,you are investing in a precision-engineered component that supports the longevity,efficiency,and safety of your high-speed rotating machinery.The GE V7768-320000 is not just a bearing—it is a cornerstone of performance in the world’s most advanced mechanical systems.

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