BG0280AJ080AAAF Parker Torqmotor Hydraulic Motor

Product Overview

The Parker Torqmotor™ BG Series BG0280 is a fixed-displacement, low-speed high-torque hydraulic motor designed for demanding mobile and industrial hydraulic drive applications.

Parker’s official LSHT Torqmotors catalog identifies BG0280 as 280 cm³/rev (17.1 in³/rev). The same catalog directs BG performance curves to the TG Series section, where the corresponding TG0280 data specifies a maximum speed of 334 rpm, continuous/intermittent pressure of 207/276 bar, and continuous/intermittent torque of 796/1073 Nm.

The configurations provided are:

• BG0280AJ080AAAF
• BG0280AJ030AAAA
• BG0280AA190AAAB

Although all three use the BG0280 displacement platform, the complete ordering code must be matched because the shaft and configuration codes are different. Parker’s ordering structure defines the motor through series, displacement, mounting/porting, shaft, rotation and options.

Technical Specifications

BG0280 Platform Data

• Brand: Parker Hannifin
• Series: Torqmotor™ BG Series
• Type: Fixed Displacement / Quantitative LSHT Hydraulic Motor
• Primary Model: BG0280AJ080AAAF
• Related Model: BG0280AJ030AAAA
• Related Model: BG0280AA190AAAB
• Geometric Displacement: 280 cm³/rev
• Displacement: 17.1 in³/rev
• Displacement Control: Fixed Displacement
• Maximum Operating Speed: 334 rpm
• Maximum Continuous Differential Pressure: 207 bar / 3000 psi
• Maximum Intermittent Differential Pressure: 276 bar / 4000 psi
• Maximum Supply Pressure: 300 bar / 4350 psi
• Maximum Continuous Flow: 76 L/min / 20 gpm
• Maximum Intermittent Flow: 95 L/min / 25 gpm
• Maximum Continuous Torque: 796 Nm / 7044 lb-in
• Maximum Intermittent Torque: 1073 Nm / 9499 lb-in
• Minimum Continuous Starting Torque: 675 Nm / 5972 lb-in
• Minimum Intermittent Starting Torque: 870 Nm / 7699 lb-in
• Continuous Performance Power: 31 kW / 42 HP
• BG Series Maximum Side Load: 16,000 N
• Rotation Code: 0 = Standard Rotation; 1 = Reverse / Timed Manifold
• Shaft Code 03: 1-1/4″ Keyed
• Shaft Code 08: 1-1/4″ Tapered
• Shaft Code 19: 1-3/8″ J501 Tapered
• AAAB: No Paint
• AAAA: Black Paint

Configuration Breakdown

BG0280AJ080AAAF

• BG Series
• 0280 = 280 cm³/rev
• AJ = configuration code
• 08 = 1-1/4″ tapered shaft
• 0 = Standard Rotation
• AAAF = specific option code

BG0280AJ030AAAA

• BG Series
• 0280 = 280 cm³/rev
• AJ = configuration code
• 03 = 1-1/4″ keyed shaft
• 0 = Standard Rotation
• AAAA = Black Paint

BG0280AA190AAAB

• BG Series
• 0280 = 280 cm³/rev
• AA = configuration code
• 19 = 1-3/8″ J501 tapered shaft
• 0 = Standard Rotation
• AAAB = No Paint

Configuration accuracy note: The currently searchable Parker public catalog clearly confirms the 03, 08 and 19 shaft codes and the standard paint options. It does not provide sufficient public documentation in the indexed edition to safely decode the legacy AA/AJ mounting/port codes for these exact part numbers. They should therefore be verified against the original dimensional drawing before claiming a direct mounting interchange. Wilson Company, a Parker distributor, currently lists all three complete models as Parker hydraulic motor assemblies.

Key Technical Advantages

1. High-Displacement LSHT Architecture

At 280 cm³/rev, the BG0280 is positioned for low-speed, high-torque hydraulic transmission. The larger displacement produces higher theoretical torque per unit pressure compared with smaller displacement motors, making the design suitable for heavy rotational loads.

2. High Starting Torque

The Parker TG0280 performance data indicates 675 Nm continuous starting torque and 870 Nm intermittent starting torque. This is valuable for machinery with high static friction, large inertia or demanding start-up conditions.

3. Defined Continuous and Intermittent Ratings

The Parker catalog separates continuous and intermittent operation rather than treating maximum pressure as a single unrestricted rating. The BG/TG platform uses 207 bar continuous and 276 bar intermittent pressure for the 0280 displacement. Intermittent ratings should be applied only within the specified duty-cycle limits.

4. Designed for Radial Shaft Loads

Parker provides dedicated radial-load guidance for the BG Series and bases bearing-life calculations on ISO 281 L10 methodology. This is important when the motor directly drives sprockets, pulleys or external gears.

5. Multiple Shaft Interfaces

The BG0280 configurations listed here use different shaft designs:

• 08: 1-1/4″ tapered shaft
• 03: 1-1/4″ keyed shaft
• 19: 1-3/8″ J501 tapered shaft

The mechanical interface must therefore be matched to the existing hub or driven component before ordering a replacement.

6. Parker Manufacturing and Testing Discipline

Parker’s Torqmotor catalog describes quality-control practices including coordinate measurement, statistical process control and final motor testing before shipment. The catalog specifically states that motors are tested before being shipped to customers.

This provides a strong engineering basis for replacement-unit quality control and simulated operating-condition verification.

Application Areas

Typical applications for the Parker BG0280 include:

• Construction machinery
• Agricultural equipment
• Forestry machinery
• Road construction equipment
• Conveyor systems
• Winches and hoists
• Material handling machinery
• Hydraulic wheel drives
• Heavy-duty rotary drives
• Sprocket, pulley and gear-driven mechanisms

The BG0280 is particularly suitable where the machine requires strong starting torque and controlled low-speed hydraulic rotation.

Expert Maintenance Tips

Verify the Complete Model

Do not order a replacement solely by BG0280. Confirm the full model code and especially the mounting/configuration and shaft codes. Parker’s ordering system treats the shaft as a dedicated configuration field.

Match Tapered Shaft Interfaces Precisely

For 08 and 19 models, verify the correct taper, shaft dimensions, hub geometry and locking arrangement. A tapered-shaft configuration must not be replaced by a keyed-shaft assembly without mechanical redesign.

Calculate Radial Load

For sprocket, pulley or gear drives, evaluate radial force together with its distance from the mounting face and operating speed. Bearing life cannot be determined from torque rating alone. Parker provides ISO 281 L10-based radial-load guidance for the BG Series.

Maintain Hydraulic Cleanliness

Flush hydraulic lines before installation and prevent machining particles, welding debris and seal fragments from entering the motor. Proper hydraulic cleanliness is essential for reliable LSHT operation.

Avoid Overspeed Operation

The TG0280 performance data associated with the BG catalog indicates a maximum speed of 334 rpm. Actual allowable speed must still be evaluated together with flow, pressure, load and duty cycle.

Perform 100% Simulated Operating-Condition Testing

For replacement BG0280 units, recommended verification includes:

• Hydraulic pressure testing
• Flow and speed testing
• Starting-torque verification
• Shaft rotation inspection
• Leakage testing
• Temperature-rise monitoring
• Abnormal-noise inspection
• Mounting and shaft dimensional verification

This approach verifies not only dimensional interchangeability, but also functional and operating-condition interchangeability.