BG0530BM030AAAB Parker Torqmotor BG Brake Motor

Product Overview

The Parker Torqmotor™ BG Series Brake Motor BG0530 is a low-speed, high-torque hydraulic motor integrated with a wet-disc, spring-applied, hydraulically released brake. The integrated brake provides parking and holding capability without requiring continuous hydraulic pressure to maintain the brake in the applied state. Parker specifies a standard brake holding capacity of 1,350 Nm (12,000 lb-in) and a brake release port capability up to 3000 psi.

For the complete configuration BG0530BM030AAAB, the Parker ordering code identifies:

• BG: BG Series Brake Motor
• 0530: 528 cm³/rev displacement
• BM: SAE “B” 2-Bolt Manifold mounting
• 03: 1-1/4″ keyed shaft
• 0: Standard rotation
• AAAB: Standard, No Paint

The corresponding BG0530BS030AAAB uses the BS mounting configuration: SAE “B” 2-Bolt with 7/8-14 SAE ports.

For replacement applications, complete configuration matching is recommended, including mounting pattern, port connection, shaft configuration and rotation. Our replacement units can also be verified for interchangeability and subjected to 100% simulated operating-condition testing before shipment.

Technical Specifications

• Brand: Parker Torqmotor™
• Series: BG Series Brake Motor
• Primary Model: BG0530BM030AAAB
• Alternative Configuration: BG0530BS030AAAB
• Displacement: 528 cm³/rev
• Displacement: 32.3 in³/rev
• Maximum Continuous Pressure: 207 bar / 3000 psi
• Maximum Intermittent Pressure: 276 bar / 4000 psi
• Maximum Oil Flow: 114 L/min / 30 gpm
• Maximum Speed: 660 rpm
• Maximum Continuous Torque: 1044 Nm / 9,239 lb-in
• Maximum Intermittent Torque: 1428 Nm / 12,636 lb-in
• Standard Brake Holding Capacity: 1350 Nm / 12,000 lb-in
• Minimum Full Brake Release Pressure: 16.5 bar / 240 psi
• Brake Release Port Pressure Capability: Up to 3000 psi
• Shaft: 1-1/4″ keyed shaft
• BM Mounting/Ports: SAE “B” 2-Bolt Manifold
• BS Mounting/Ports: SAE “B” 2-Bolt, 7/8-14 SAE
• BG0530 BM Weight: 31.6 kg / 69.7 lb
• BG0530 BS Weight: 31.6 kg / 69.7 lb
• BM Overall Length: 277.7 mm / 10.93 in
• BS Overall Length: 277.7 mm / 10.93 in
• Rotation Code: Standard Rotation
• AAAB Option: Standard, No Paint

Key Technical Advantages

Integrated Hydraulic Motor and Parking Brake

The BG Brake Motor combines hydraulic drive and parking brake functionality in one assembly. Its spring-applied, hydraulically released brake automatically applies when release pressure is removed, providing a fail-safe-oriented holding principle for appropriate applications.

High-Displacement LSHT Performance

With 528 cm³/rev displacement, the BG0530 is designed for high torque generation at relatively low rotational speed. This architecture is well suited to applications where controlled low-speed movement and high starting torque are more important than high-speed operation.

High Pressure and Torque Capability

The official Parker data specifies up to 3000 psi continuous pressure and 4000 psi intermittent pressure, with maximum continuous torque of 1044 Nm and intermittent torque of 1428 Nm. These characteristics make the motor suitable for demanding hydraulic drive cycles and transient load conditions.

Robust Brake-Holding Architecture

The front-mounted brake is designed to provide reliable holding performance, with a standard rated holding torque of 12,000 lb-in. This configuration is particularly relevant to machinery that must remain stationary after hydraulic drive pressure is removed.

Multiple Mounting and Shaft Configurations

The BG series supports several mounting/port arrangements and shaft configurations. Consequently, proper replacement selection must verify the complete ordering code rather than relying on displacement alone.

Engineered for External Load Conditions

Parker provides guidance for radial and dynamic side loading and references L10 bearing life according to ISO 281. This is important for applications where the output shaft is exposed to chain, sprocket, pulley or other externally generated radial loads.

Application Areas

Typical applications for the BG0530 Parker Torqmotor Brake Motor include:

• Construction equipment
• Hydraulic drive systems
• Winches and hoisting equipment
• Heavy-duty conveyors
• Material handling machinery
• Agricultural machinery
• Forestry equipment
• Road construction machinery
• Industrial rotary drives
• Hydraulic systems requiring parking or holding capability

Final application selection should be based on actual pressure, flow, speed, torque, duty cycle and shaft loading.

Expert Maintenance Tips

1. Verify the Complete Model Code

Before installation, confirm BG0530 + BM/BS + 03 + rotation + option code. The BM and BS configurations have different port/mounting arrangements and should not be treated as interchangeable solely because they share the same displacement.

2. Verify Brake Release Pressure

The official specification lists 240 psi / 16.5 bar minimum full release pressure. Insufficient release pressure may prevent complete brake disengagement and can lead to additional friction, heat generation and reduced operating efficiency.

3. Maintain Hydraulic Cleanliness

Use clean hydraulic oil and properly flushed hydraulic lines. Prevent assembly debris from entering the motor ports, and ensure that the hydraulic filtration strategy is appropriate for the complete system.

4. Check Radial Shaft Loading

Where the motor drives a sprocket, belt pulley or external gear, calculate the actual radial load and its distance from the mounting face. Parker’s bearing-load guidance should be considered rather than selecting the motor based only on torque capacity.

5. Confirm Full Brake Release After Service

After installation or maintenance, verify that the hydraulic release circuit reaches the required pressure and that the motor shaft can rotate without abnormal brake drag. Also confirm that the brake reapplies correctly when release pressure is removed.

6. Perform Simulated Condition Testing for Replacement Units

For replacement BG0530 units, a robust quality-control process should include 100% simulated operating-condition testing, together with verification of pressure, flow, speed, brake release behavior, shaft configuration and mounting dimensions before shipment.