Rexroth Hägglunds CBP series Radial piston hydraulic motor

The Hägglunds CBP is a radial piston hydraulic motor built around a rotating cylinder block and hollow shaft, housed inside a stationary casing. An even number of pistons sit radially in bores within the cylinder block. Each piston pushes against a cam roller, which rides against the sloped profile of a cam ring fixed to the housing. As hydraulic pressure forces the pistons outward, the interaction between roller and cam slope generates torque directly at the shaft — no gearbox, no belts, no intermediate reduction stage.

How the CBP Differs From the CB and CBm Series

Bosch Rexroth's Hägglunds portfolio isn't a single motor — it's a family, and each series is tuned for a different balance of torque, speed, weight, and footprint.

CB Series: The Workhorse

The original Hägglunds CB is the baseline direct-drive motor, well suited to crushers, feeders, roll mills, and other applications where full torque from zero speed and shock-load resistance matter more than squeezing out the last kilowatt of power density.

CBm Series: Torque-to-Weight Leader (Predecessor Class)

The CBm improved on the CB by packing roughly 50% more torque into a motor that's smaller and lighter, giving it what Bosch Rexroth describes as the world's highest torque-to-weight ratio in its class at the time of release.

CBP Series: Power Density Leader

The CBP goes a step further and targets power density, not just torque-to-weight. It's built for applications that need continuous high-power operation in a housing that can't grow any larger — think retrofits where a hydraulic motor has to replace an electric motor-and-gearbox combination inside an existing footprint.

How the CBP Series Works: A Closer Look at the Mechanism

Understanding the internal geometry helps explain why radial piston motors like the CBP are so tolerant of harsh operating conditions.

The Rotating Cylinder Block and Hollow Shaft

Unlike axial piston motors, the CBP's cylinder block rotates together with the hollow output shaft, which is supported by fixed roller bearings inside the housing. The hollow shaft design also allows through-shaft mounting options, simplifying integration with existing drivetrains.

The Cam Ring and Piston Assembly

Pistons are arranged radially around the cylinder block. Two valve plates route pressurized oil to and from the working pistons in sequence. As each piston is pressurized, its cam roller is driven against the sloped cam ring rigidly fixed to the housing — and it's this slope that converts linear piston force into rotational torque.

Full Torque From Zero Speed

Because torque generation doesn't depend on centrifugal effects or spin-up, the CBP — like the rest of the Hägglunds range — produces full rated torque starting from a dead stop. That's a decisive advantage over electric motor-and-gearbox drives in applications with frequent starts, stalls, or reversals.

Where the CBP Series Is Used

The CBP's combination of compact size, high power density, and shock tolerance makes it a natural fit for industries where equipment runs continuously under punishing loads.

Example: Mining and Mineral Processing

Ball mills, crushers, and conveyor drives in mining operations regularly encounter jamming, sudden overload, and abrasive debris. A CBP motor mounted as a direct drive eliminates the gearbox that would otherwise be the first component to fail under shock loading, while also cutting maintenance access requirements.

Example: Marine and Offshore Winches

Anchor handling winches, mooring winches, and cable-laying equipment need precise, high-torque control at low speed, often with frequent load reversals. The CBP's four-quadrant operation (a hallmark of the Hägglunds range) allows it to actively brake and hold loads without a separate braking system.

Example: Steel and Heavy Manufacturing

Rolling mills, extruders, and mixers benefit from the CBP's ability to deliver continuous high power in a housing small enough to retrofit into existing production lines without redesigning the surrounding structure.

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

Specifications

Selection Table

Q1: Can a CBP motor be mounted directly onto existing machinery?

A1: Yes. The CBP supports both flange mounting and torque-arm mounting, and its hollow shaft design allows integration with a range of existing drivetrain layouts.

Q2: What industries typically use the Hägglunds CBP series?

A2: Mining and mineral processing, marine and offshore winch systems, steel and metals production, pulp and paper, and other heavy-duty industrial sectors where shock loads and continuous high torque are routine.

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

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

Q4:How to purchase a CBP hydraulic motor?

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