Fruitland Oilfield Gearbox, 1:1 Gear Ratio, 1.25″ Shaft – FR500-GB400

Description

Product Overview

Fruitland Oilfield Gearbox FR500-GB400 is engineered to meet the demanding requirements of oilfield vacuum truck applications where reliable power transmission is essential. The unit features a precise 1:1 gear ratio that maintains constant speed between the input and output shafts, eliminating the need for complex speed reduction calculations. Its 1.25‑inch input shaft and matching dual 1.25‑inch output shafts provide a compact yet robust connection to standard power‑take‑off (PTO) pump assemblies, ensuring seamless integration with existing equipment. Constructed from high‑strength forged steel, the gearbox housing offers exceptional resistance to wear, corrosion, and thermal stress, while the internal press‑fit tapered roller bearings deliver smooth rotation and extended service life even under heavy load conditions. The design incorporates a high‑thermal‑capacity housing that dissipates heat efficiently, reducing the risk of overheating during prolonged operation. Each gearbox is lubricated and run‑in at the factory, guaranteeing optimal performance out of the box and minimizing the need for break‑in procedures. Detailed specifications list a compact footprint of 13 × 11 × 6 inches and a weight of approximately 30 pounds, making it easy to handle during installation and maintenance. Since its introduction in November 2014, the FR500‑GB400 has maintained a strong reputation for durability, reflected in a five‑star rating from verified customers and a best‑seller rank within the gearboxes category.
Fruitland Manufacturing applies rigorous quality control procedures throughout the production cycle of the FR500‑GB400, beginning with material selection and continuing through final inspection. Each batch of forged steel undergoes tensile testing to verify compliance with ASTM standards, while the gear teeth are measured with precision CNC equipment to ensure exact 1:1 meshing. The press‑fit tapered roller bearings are assembled in a clean‑room environment to prevent contamination, and the completed gearbox is subjected to a full load test on a dynamometer that simulates real‑world PTO pump conditions. This comprehensive testing regimen confirms that the unit can sustain continuous torque loads exceeding the rated specifications without premature wear or failure. In addition, the gearbox is coated with a corrosion‑resistant finish that extends service life in harsh oilfield environments where exposure to moisture, chemicals, and temperature fluctuations is common.
The FR500‑GB400 is specifically designed to integrate with standard PTO pump drive gearboxes found on a wide range of oilfield vacuum trucks, making it a versatile replacement or upgrade component. Its dual output shafts allow simultaneous power delivery to two pump stages or auxiliary equipment, reducing the need for additional gear reduction units. The gearbox’s compact dimensions enable installation in confined engine bays, while the robust housing provides mounting points that align with existing bolt patterns, simplifying retrofitting procedures. Operators appreciate the low noise profile generated by the precision‑forged gears, which contributes to a safer working environment and complies with occupational noise regulations. Moreover, the factory‑lubricated design eliminates the requirement for extensive field lubrication, saving time and reducing the risk of improper oil application. The product’s durability is further enhanced by the use of high‑grade steel alloys that resist fatigue cracking, ensuring consistent performance over thousands of operating hours.

Usage

The FR500‑GB400 gearbox is ideally suited for oilfield service vehicles that require dependable power transmission to operate high‑capacity vacuum pumps. In typical vacuum truck operations, the PTO shaft of the engine drives a pump that creates suction to collect hydrocarbons, water, and other fluids from well sites, pipelines, or spill areas. The gearbox’s 1:1 ratio ensures that pump speed matches engine speed, providing predictable flow rates and simplifying control strategies for operators. Because the unit features dual 1.25‑inch output shafts, it can simultaneously power a secondary pump or auxiliary hydraulic system, allowing crews to perform multiple tasks without additional gear reduction hardware. The robust housing tolerates the vibration and shock loads common in off‑road environments, while the tapered roller bearings absorb axial forces generated during pump start‑up and shutdown cycles. The high‑thermal‑capacity design dissipates heat generated by continuous pump operation, preventing overheating even during extended duty cycles that can exceed eight hours of nonstop work. Installation is straightforward for technicians familiar with standard PTO configurations; the 1.25‑inch input shaft aligns with the engine’s PTO spline, and the output shafts bolt directly to the pump’s drive flanges using the supplied hardware kit. Maintenance intervals are minimal, as the factory‑lubricated bearings require only periodic oil checks during routine service. This reliability makes the FR500‑GB400 a preferred choice for contractors, municipal services, and oilfield operators who demand uninterrupted performance in harsh field conditions.
Beyond vacuum truck applications, the FR500‑GB400 can be employed in ancillary oilfield equipment such as mud agitators, hydraulic power units, and auxiliary generators that rely on PTO‑driven mechanisms. Its ability to maintain a constant speed ratio simplifies the integration of variable‑speed engines, as the gearbox does not introduce additional speed changes that could affect pump efficiency. In remote field locations where spare parts availability is limited, the straightforward design of the FR500‑GB400 allows field technicians to perform basic repairs using standard hand tools, reducing downtime and service costs. The gearbox’s sealed housing protects internal components from dust, sand, and chemical exposure, which are common in desert and coastal oilfield sites. Operators also benefit from the quiet operation, which minimizes acoustic fatigue for crew members working in close proximity to the equipment. Overall, the FR500‑GB400 delivers a balance of performance, durability, and ease of service that aligns with the operational demands of modern oilfield and industrial power transmission tasks.
Fruitland’s compatibility with standard ISO shaft standards further simplifies cross‑equipment integration, ensuring that it can be swapped quickly across a fleet of vehicles without custom machining.

Why Choose Us

Choosing Fruitland Manufacturing means partnering with a company that has over three decades of experience delivering high‑performance power transmission solutions to the oil and gas sector. The FR500‑GB400 gearbox reflects the company’s commitment to engineering excellence, combining precision‑forged gears with a rugged housing that meets the stringent demands of field service. Fruitland’s in‑house design team works closely with end‑users to refine product specifications, ensuring that each gearbox aligns with real‑world operating conditions and delivers consistent torque transfer without slippage or premature wear.
Every FR500‑GB400 unit undergoes a multi‑stage quality assurance program that includes dimensional inspection, hardness testing, and a full‑load dynamometer run that replicates the stresses of a PTO‑driven pump. This rigorous validation process identifies any potential defects before the gearbox leaves the factory, guaranteeing that customers receive a product that meets or exceeds the original equipment manufacturer (OEM) specifications. Fruitland also provides a comprehensive warranty that covers material and workmanship defects for two years, giving buyers confidence in the long‑term reliability of their investment. In addition, the company maintains a dedicated technical support team that can assist with installation guidance, troubleshooting, and parts sourcing, ensuring that any issues are resolved quickly to minimize equipment downtime.
Fruitland’s commitment to sustainability and after‑sales service further distinguishes the FR500‑GB400 from competing products. The manufacturing process incorporates recycled steel and uses energy‑efficient machining practices, reducing the overall carbon footprint of each gearbox. Customers benefit from a network of authorized service centers that stock genuine replacement parts, enabling rapid repairs and prolonging the lifespan of the equipment. Moreover, Fruitland offers optional training programs for field technicians, covering best practices for installation, lubrication, and preventive maintenance, which helps organizations maintain peak performance and avoid costly unplanned outages.
Fruitland also offers customization options for the FR500‑GB400, allowing customers to specify alternative shaft diameters, bore sizes, or material treatments such as nitriding for enhanced surface hardness. This flexibility enables the gearbox to be tailored to unique machine configurations or to meet specific regulatory standards in different regions. Global logistics capabilities ensure that the product can be shipped quickly to remote job sites, with expedited freight options available for urgent projects. The combination of robust engineering, thorough testing, responsive support, and adaptable design makes the FR500‑GB400 a strategic choice for organizations seeking dependable power transmission in demanding oilfield and industrial applications.
Overall, the FR500‑GB400 delivers unmatched value and performance for critical power transmission needs.

Key Features

• 1:1 gear ratio provides consistent speed between engine and pump, eliminating the need for additional speed conversion and simplifying system design.
• Dual 1.25‑inch output shafts enable simultaneous power to two pumps or auxiliary equipment, increasing operational flexibility without extra gearboxes.
• Press‑fit tapered roller bearings deliver smooth rotation and high load capacity, reducing wear and extending service intervals in harsh oilfield conditions.
• High‑thermal‑capacity housing efficiently dissipates heat, preventing overheating during prolonged pump operation and maintaining performance over long duty cycles.
• Factory‑lubricated and run‑in at the plant, the gearbox arrives ready for immediate use, and Fruitland’s dedicated support team offers prompt assistance and spare parts availability.

FAQ

What types of equipment can the FR500‑GB400 be installed on?

The FR500‑GB400 is engineered to fit a broad range of PTO‑driven equipment commonly found in oilfield and industrial settings. Its standard 1.25‑inch input shaft matches the majority of engine PTO splines, allowing direct connection to diesel or gasoline engines used on vacuum trucks, mud agitators, hydraulic power units, and auxiliary generators. The dual 1.25‑inch output shafts can be coupled to single‑stage or multi‑stage centrifugal pumps, reciprocating pumps, or even to drive secondary accessories such as winches or compressors. The gearbox’s compact dimensions make it suitable for installation in confined engine bays, while the robust mounting points align with existing bolt patterns on most OEM pump housings. Additionally, the unit can be retrofitted into older equipment that originally used compatible gearboxes, providing a cost‑effective upgrade path without extensive redesign. Overall, the FR500‑GB400’s versatility enables it to serve as a reliable power transmission component across a wide spectrum of oilfield vacuum trucks, industrial pump stations, and mobile hydraulic systems.

How does the 1:1 gear ratio affect pump performance?

A 1:1 gear ratio means that the output shaft rotates at the same speed as the input shaft, providing a direct and predictable relationship between engine RPM and pump speed. This eliminates the need for additional speed reduction stages, which can introduce inefficiencies, heat, and potential slip. For PTO‑driven vacuum pumps, maintaining a constant speed ensures that the suction flow rate remains stable, allowing operators to achieve consistent cleaning or fluid removal rates across varying engine loads. The direct drive also reduces mechanical complexity, lowering the overall weight and footprint of the power transmission system. Because the torque is transferred without amplification or reduction, the gearbox must be designed with robust materials and bearings to handle the full load, which the FR500‑GB400 accomplishes through its forged steel gears and tapered roller bearings. In practice, the 1:1 ratio simplifies control strategies, reduces maintenance points, and improves overall system efficiency, making it an ideal choice for applications where precise pump speed control is critical.

What maintenance is required for the gearbox?

The FR500‑GB400 is designed for low‑maintenance operation, but regular inspection helps ensure long service life. Operators should check the external oil level during routine equipment servicing and top up with the recommended lubricant if the level is below the marked sight glass. Visual inspection of the housing for signs of oil leaks, corrosion, or physical damage should be performed at least every 500 operating hours. The tapered roller bearings are sealed, but if the gearbox is exposed to extreme dust or moisture, the seals should be examined and replaced as needed. It is advisable to re‑lubricate the bearings annually or after any major repair, following the manufacturer’s torque specifications for bearing caps. Additionally, the gear teeth should be monitored for wear or pitting, especially if the gearbox is subjected to overload conditions. Following these simple maintenance steps, combined with the factory‑run‑in process, will keep the gearbox operating smoothly and minimize unexpected downtime.

Can the gearbox be customized for different shaft sizes or materials?

Fruitland offers a range of customization options for the FR500‑GB400 to meet specific application requirements. Customers can request alternative input or output shaft diameters, such as 1.5‑inch or 2‑inch options, to match non‑standard PTO configurations or larger pump connections. Material selections can also be modified; for environments with extreme abrasion or chemical exposure, the gearbox housing can be fabricated from alloy steel with a nitrided surface treatment to increase hardness and wear resistance. Additional features such as a sealed enclosure, reinforced mounting brackets, or optional planetary gear sets are available upon request. Custom orders are processed through Fruitland’s engineering team, who work with the client to verify dimensional clearances, load calculations, and compatibility with existing equipment. Lead times for customized units vary based on the complexity of the changes, but the company strives to deliver tailored solutions within a reasonable timeframe while maintaining the same high quality and reliability standards as the standard model.