Hagglunds CBM High torque low speed hydraulic motor

The Hägglunds CBM is a radial piston hydraulic motor designed as a direct-drive replacement for electric motors paired with mechanical gear reducers. It was developed as the successor to the long-serving Hägglunds Marathon motor, and it's part of Bosch Rexroth's broader Hägglunds product family, which also includes the CA, CBp, Atom, and Quantum series.

Why Engineers Choose the CBM Over Geared Electric Drives

1. Full Torque From Zero RPM

Unlike an electric motor, which typically needs to spin up before it reaches full torque, the CBM delivers maximum torque the instant it starts moving. This matters enormously in applications like ship winches or mill drives, where a load needs to be controlled precisely from a dead stop — no ramp-up lag, no torque converter needed.

2. Shock Load Protection

Hydraulic direct drives absorb mechanical shocks far better than rigid gear trains. When a mixer hits an unexpected clump of material, or a winch line snags, the hydraulic fluid itself acts as a buffer. Bosch Rexroth highlights this directly, noting that the CBM provides full torque from zero speed, protection from shock loads, and four-quadrant operation— meaning it can drive, brake, and reverse the load in either rotational direction without additional hardware.

3. Smaller Footprint, Lower Installed Weight

Because the CBM eliminates the gearbox, the overall drivetrain shrinks. Bosch Rexroth's product messaging emphasizes that this means customer machines — and in some cases the facilities that house them — can be smaller, lighter, and simpler, while also lowering overall investment and increasing long-term revenue potential.

4. Simplified Retrofits

For plants running older Hägglunds motors, the CBM was designed with backward compatibility in mind. Certain frame sizes are available with a shrink disc coupling option for CBM 2000 through CBM 3000, enabling direct and easy retrofit for older Hägglunds MB 1600 and MB 2400 motors. That means plants can upgrade to a smaller, lighter, higher-torque motor without redesigning the surrounding machine structure.

Real-World Applications

The CBM's combination of low speed and enormous torque makes it a natural fit anywhere a heavy load needs precise, direct control without a gearbox in the way. Common examples include:

Ship propulsion and deck machinery — winches, thrusters, and anchor handling systems where torque needs to be applied smoothly and reversed quickly

Mining and mineral processing — ball mills, rotary kilns, crushers, and conveyor drives that face constant shock loading from raw material

Pulp and paper — reel drives and other slow-turning, high-torque process equipment

Rubber and plastics — mixers and extruders that need consistent torque at very low RPM

Material handling — cranes, ship unloaders, and bulk handling systems that combine heavy loads with the need for fine speed control

For more information on the CBM hydraulic motor, please visit https://www.baolilaihydraulic.com/product/.

Specifications

Selection Table

Q1: What industries commonly use the Hägglunds CBM?

A1: Marine and offshore, mining and mineral processing, pulp and paper, rubber and plastics processing, and heavy material handling are among the most common sectors, largely because these industries combine heavy, shock-prone loads with a need for precise low-speed control.

Q2: How does the CBM handle shock loads compared to a mechanical drive?

A2: The hydraulic fluid in the motor's circuit naturally absorbs and dampens sudden load spikes, a property mechanical gear trains lack. Bosch Rexroth also rates the CBM for repeated transient pressure spikes (up to 420 bar / 6,000 psi, allowed up to 10,000 times), which is factored into the motor's shock-load tolerance.

Q3: What is the price and delivery time of the CBM hydraulic motor?

A3: The price and delivery time will be provided based on the model you specify.

Q4:How to purchase a CBM hydraulic motor?

A4: You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products via various methods.