{"product_id":"h2136151-hydraulic-gear-pump-with-7-8-13-spline-shaft-and-1-1-2-inch-diameter-gear","title":"H2136151 - Hydraulic Gear Pump With 7\/8-13 Spline Shaft And 1-1\/2 Inch Diameter Gear","description":"\u003cp\u003eThe H21 Series Hydraulic Gear Pump with Spline Shaft from Buyers Products is a sturdy, durable bi-rotational pump that can be 2- or 4-bolt mounted in an SAE B mount. The pump is built tough of cast iron with teflon-coated bronze thrust plates. Four internal dowels work to protect its structural integrity. Choose from a range of models with flow rates from 6.8 to 15.3 at 1000 RPM. The pumps are capable of higher pressures, taking up to 2500 or 3000 PSI. All of the models feature a 7\/8 in. by 13 spline shaft.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse; width:100%; font-size:14px;\"\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eDirect Mount\/Remote Mount\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e2\/4 Bolt SAE B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eDirect or Remote Mount\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003eDirect Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eDisplacement\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eFlow\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eFlow at 1000 RPM\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e11.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eFlow at 1200 RPM\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e13.56\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eFlow at 1500 RPM\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e16.95\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eFlow at 1800 RPM\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e20.34\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eFlow at 2100 RPM\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e23.73\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eFlow at 600 RPM\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e6.78\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eFlow at 900 RPM\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e10.17\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eGear Size\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eGear Width\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e1.500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eInlet Port Size\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e1 NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eInput Mount Type\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003eIntegral Bracket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eMaterial\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003eCast Iron\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eMaximum Pressure\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e3000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eMaximum Rotations Per Minute (RPM)\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e2000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border=\" solid background:\u003eMount Type\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003eSAE B 2\/4 Bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eOutlet Port Size\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e1 NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003ePilot Diameter\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e4.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003ePorts (rear\/side)\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003eRear\/Side\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eRear Port Size\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e1 NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eRotation\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003eBi-Directional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eShaft Size\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e7\/8-13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eShaft Type\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003eSplined\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align:left; padding:6px 10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003eSuction Port Size\u003c\/th\u003e\n\u003ctd style=\"padding:6px 10px; border:1px solid #e5e7eb;\"\u003e1 NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eAdvanced Technical Overview: H21 Series Hydraulic Gear Pump with 7\/8-13 Spline Shaft and 1-1\/2 Inch Diameter Gear\u003c\/h2\u003e\u003cp\u003eThe H21 Series Hydraulic Gear Pump, offered by Buyers Products, represents a pinnacle of robust engineering and reliable performance within the realm of external gear pumps. This specific model, characterized by its 7\/8-13 spline shaft and 1-1\/2 inch diameter gears, is meticulously designed for demanding hydraulic applications requiring consistent power transmission and longevity. As a critical component in various power systems, this pump is engineered to deliver high volumetric efficiency and sustained operational stability under rigorous conditions, making it an indispensable asset across numerous industrial and mobile hydraulic sectors.\u003c\/p\u003e\u003ch3\u003eCore Design and Material Engineering\u003c\/h3\u003e\u003cp\u003eAt the heart of the H21 Series pump's exceptional durability and performance lies its superior material selection and precision engineering. The pump housing is constructed from high-grade cast iron, a material renowned for its inherent strength, excellent vibration damping characteristics, and superior thermal stability. This robust cast iron body provides an unyielding structure capable of withstanding the substantial internal pressures and external stresses typical in hydraulic systems. The mass and rigidity of cast iron also contribute to reduced noise levels during operation, an important consideration in many working environments. Furthermore, its resistance to thermal distortion ensures that the critical internal clearances remain consistent across a broad range of operating temperatures, thereby preserving efficiency and extending service life.\u003c\/p\u003e\u003cp\u003eComplementing the robust housing are the meticulously engineered internal components. The H21 series incorporates Teflon-coated bronze thrust plates. These components are strategically positioned to manage axial thrust loads exerted by the rotating gears, a common challenge in high-pressure gear pump designs. The bronze substrate provides inherent strength and excellent bearing properties, while the Teflon coating significantly reduces friction between the rotating gears and the stationary plates. This reduction in friction is multi-faceted in its benefits: it minimizes wear on critical surfaces, enhancing the pump's operational lifespan; it decreases heat generation, contributing to overall system thermal management; and it improves mechanical efficiency by reducing energy losses associated with friction. The result is a pump that maintains its performance parameters over extended periods, even in continuous duty cycles.\u003c\/p\u003e\u003cp\u003eStructural integrity is further bolstered by the inclusion of four internal dowels. These precisely machined dowels serve a critical function in ensuring accurate alignment of the pump's various sections – typically the front cover, gear housing, and rear cover – during assembly and throughout its operational life. By rigidly locating these components, the dowels prevent any potential shifting or misalignment under fluctuating pressures and vibrations. This precise alignment is paramount for maintaining tight internal tolerances, minimizing internal leakage (slip), and ensuring the smooth, synchronized rotation of the gears. The integrity provided by these dowels is a key factor in the pump's ability to achieve and sustain its specified pressure ratings and volumetric efficiency, directly impacting its overall reliability and durability in high-performance applications.\u003c\/p\u003e\u003ch3\u003ePerformance Parameters and Hydraulic Characteristics\u003c\/h3\u003e\u003cp\u003eThe H21 Series Hydraulic Gear Pump, specifically the model featuring 1-1\/2 inch diameter gears and a 3 cubic inch per revolution (CIR) displacement, delivers a highly predictable and linear flow output relative to its input speed. This direct proportionality is a hallmark of external gear pumps and is clearly evidenced by the provided flow rate specifications:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAt 600 RPM, the pump delivers 6.78 GPM.\u003c\/li\u003e\n\u003cli\u003eAt 900 RPM, the flow increases to 10.17 GPM.\u003c\/li\u003e\n\u003cli\u003eAt 1000 RPM, a benchmark flow rate of 11.3 GPM is achieved.\u003c\/li\u003e\n\u003cli\u003eAt 1200 RPM, the flow is 13.56 GPM.\u003c\/li\u003e\n\u003cli\u003eAt 1500 RPM, the pump produces 16.95 GPM.\u003c\/li\u003e\n\u003cli\u003eAt 1800 RPM, the output reaches 20.34 GPM.\u003c\/li\u003e\n\u003cli\u003eAt 2100 RPM, the flow peaks at 23.73 GPM.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThese figures underscore the pump's capability to provide substantial hydraulic power across a range of operational speeds, catering to diverse system requirements from low-speed, high-torque applications to faster-acting systems. The volumetric displacement of 3 CIR means that for every full revolution of the drive shaft, the pump theoretically displaces 3 cubic inches of hydraulic fluid, a fundamental parameter defining its capacity.\u003c\/p\u003e\u003cp\u003eA critical performance metric for any hydraulic pump is its maximum pressure rating. The H21 Series pump is engineered for robust performance, capable of operating at maximum pressures up to 3000 PSI. This high-pressure capability positions the pump for demanding applications such as heavy lifting, material handling, snow and ice control equipment, agricultural machinery, and various industrial presses where significant force generation is required. The ability to maintain stability and efficiency at such elevated pressures is a direct testament to its heavy-duty cast iron construction, precision-machined gears, and the effectiveness of the Teflon-coated bronze thrust plates in managing internal loads.\u003c\/p\u003e\u003cp\u003eThe specified maximum continuous operational speed for this model is 2000 RPM. While flow rates are provided up to 2100 RPM, it is important for system designers to adhere to the 2000 RPM continuous rating to ensure optimal longevity and prevent premature wear. Operating within the manufacturer-recommended RPM range ensures that dynamic stresses on internal components, heat generation, and cavitation risks are maintained within acceptable limits, thereby maximizing the pump's service life and maintaining warranty validity.\u003c\/p\u003e\u003ch3\u003eShaft and Mounting System Configuration\u003c\/h3\u003e\u003cp\u003eThe interface between the power source and the hydraulic pump is crucial for reliable operation. This H21 Series pump features a 7\/8 inch by 13 spline shaft, a design choice that offers significant advantages over traditional keyed shafts. A splined shaft provides a much larger contact area between the shaft and the coupling, allowing for superior torque transmission capacity without inducing excessive stress concentrations. This design distributes the load more evenly, thereby minimizing wear, reducing backlash, and enhancing the overall mechanical integrity of the drive connection. The 13 splines further ensure a robust and precise engagement, crucial for applications involving frequent start-stop cycles or variable loads, ensuring maximum power transfer efficiency and reducing the risk of shaft or coupling failure.\u003c\/p\u003e\u003cp\u003eMounting versatility is another hallmark of this pump. It adheres to the SAE B mounting standard, specifically accommodating both 2-bolt and 4-bolt configurations. The SAE B standard is widely recognized and utilized across the hydraulic industry, ensuring broad compatibility with a variety of power take-offs (PTOs), electric motors, and engine flywheel housings. The 4.00-inch pilot diameter is integral to the SAE B specification, ensuring precise concentric alignment between the pump and the prime mover. This concentricity is vital for minimizing vibratory stresses, reducing noise, and preventing premature bearing wear in both the pump and the driving unit. The pump's designation as a \"Direct Mount\" type, coupled with an \"Integral Bracket\" input mount, streamlines installation processes by allowing direct coupling to a power source, eliminating the need for complex intermediate drive arrangements in many scenarios and simplifying system integration.\u003c\/p\u003e\u003cp\u003eFurthermore, the pump is engineered for bi-directional rotation. This capability significantly enhances its application flexibility, allowing it to be used in systems where the prime mover may rotate in either direction, or where a single pump design needs to cater to varying PTO configurations. This inherent bi-rotational feature reduces inventory complexity and provides design engineers with greater freedom in system layout without compromising performance.\u003c\/p\u003e\u003ch3\u003ePorting Options and Fluid Dynamics\u003c\/h3\u003e\u003cp\u003eEfficient fluid transfer is essential for hydraulic system performance. The H21 Series pump is equipped with 1 NPT (National Pipe Taper) inlet, outlet, and suction ports, including dedicated rear ports. The use of NPT threads is standard in many hydraulic applications, offering a reliable and readily available connection method. The tapered thread design, when properly sealed, provides a strong mechanical joint and excellent fluid retention capabilities. Specifying 1 NPT for both inlet and outlet ensures adequate flow cross-section to minimize pressure drops and prevent cavitation at the suction side, which is critical for maintaining pump efficiency and longevity, particularly at higher flow rates.\u003c\/p\u003e\u003cp\u003eThe availability of both rear and side porting options offers significant flexibility in hydraulic system layout. This allows system designers to optimize hose and tube routing based on available space, minimizing bend radii and reducing overall system plumbing complexity. For example, a rear-port configuration might be ideal for inline installations, while side ports could simplify connections in more confined spaces or when integrating with specific manifold designs. This adaptability ensures that the pump can be seamlessly integrated into a wide array of mobile and stationary hydraulic applications.\u003c\/p\u003e\u003ch3\u003eOperational Advantages and Ideal Applications\u003c\/h3\u003e\u003cp\u003eThe design and construction of the H21 Series Hydraulic Gear Pump yield several key operational advantages. Its robust cast iron construction, combined with precision-machined gears and Teflon-coated bronze thrust plates, contributes to outstanding durability and an extended operational lifespan. This translates into reduced downtime, lower maintenance costs, and a higher return on investment for the end-user.\u003c\/p\u003e\u003cp\u003eThe pump’s high volumetric efficiency, particularly across its specified operating pressure and speed range, ensures that a significant percentage of the input mechanical power is converted into useful hydraulic power. This efficiency is critical for conserving energy, reducing operational costs, and preventing excessive heat buildup within the hydraulic fluid, which can degrade fluid quality and component life. The precise internal clearances and effective sealing mechanisms, aided by the internal dowels, minimize internal leakage, or \"slip,\" which is a common source of efficiency loss in gear pumps.\u003c\/p\u003e\u003cp\u003eThe versatility provided by its bi-rotational capability, SAE B mounting standard, and flexible porting options makes this pump suitable for a vast array of hydraulic applications. These include, but are not limited to:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMobile Hydraulics:\u003c\/strong\u003e Snowplows, salt spreaders, dump trucks, refuse vehicles, utility trucks, agricultural tractors and implements, construction equipment (mini excavators, skid steers), and forestry machinery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Hydraulics:\u003c\/strong\u003e Power units for presses, machine tools, material handling systems, and general industrial automation where a reliable and compact hydraulic power source is needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAgricultural Equipment:\u003c\/strong\u003e Powering cylinders for lifting, steering, and operating various attachments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine Applications:\u003c\/strong\u003e Certain auxiliary systems requiring robust hydraulic power.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIts ability to handle pressures up to 3000 PSI makes it particularly well-suited for demanding tasks that require significant force or torque, while its range of flow rates allows for precise control of actuator speeds.\u003c\/p\u003e\u003ch3\u003eInstallation and Maintenance Considerations\u003c\/h3\u003e\u003cp\u003eTo maximize the performance and longevity of the H21 Series pump, proper installation and routine maintenance are paramount. It is crucial to ensure that the pump is installed correctly, with the drive shaft and coupling perfectly aligned to the prime mover to prevent excessive radial or axial loads on the pump bearings. The hydraulic system should incorporate appropriate filtration to maintain fluid cleanliness, protecting the precision internal components from abrasive wear. Regular inspection of hydraulic fluid levels and quality, along with timely filter changes, will ensure optimal operational health. The NPT ports should be sealed correctly to prevent air ingestion on the suction side and external leakage on the pressure side, which can severely impact pump performance and system efficiency.\u003c\/p\u003e\u003ch3\u003eConclusion\u003c\/h3\u003e\u003cp\u003eThe Hydraulic Gear Pump with 7\/8-13 Spline Shaft and 1-1\/2 Inch Diameter Gear from Buyers Products' H21 Series stands as a testament to robust engineering and dependable performance. Its heavy-duty cast iron construction, advanced Teflon-coated bronze thrust plates, and meticulously designed internal dowels ensure unparalleled durability and structural integrity. With a 3 CIR displacement and the capability to deliver up to 23.73 GPM at 2100 RPM (with a continuous maximum of 2000 RPM) and withstand pressures up to 3000 PSI, it provides the power and reliability required for the most demanding hydraulic applications. The versatile SAE B 2\/4 bolt direct mount, combined with a robust splined shaft and flexible NPT porting options, simplifies integration into diverse hydraulic systems. This pump is an excellent choice for professionals seeking a high-performance, long-lasting hydraulic power solution for both mobile and industrial environments, ensuring efficient and consistent operation under challenging conditions.\u003c\/p\u003e","brand":"buyersproductscompany","offers":[{"title":"Default Title","offer_id":62449269211507,"sku":"H2136151","price":415.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/9513\/9187\/files\/H2136101_45_1d90349c-a59f-4322-99f8-434610755b12.jpg?v=1768594322","url":"https:\/\/titustrucksaccessories.com\/products\/h2136151-hydraulic-gear-pump-with-7-8-13-spline-shaft-and-1-1-2-inch-diameter-gear","provider":"Titus Trucks Accessories ","version":"1.0","type":"link"}