How to Choose EP300R vs NB300R Right Angle Planetary Gearbox？

What Both Series Have in Common

Before identifying the differences, it is useful to establish what the EP300R and NB300R share. Both are right angle planetary gearboxes — meaning the input (motor connection) and output shaft are positioned at 90° to each other via an integrated spiral bevel gear stage. Both use modular construction with standard input adaptor flanges for hydraulic motors, IEC electric motors, and NEMA electric motors. Both are available with foot mount and flange mount output configurations, and with multiple output shaft types (keyed solid, splined, hollow with shrink disc).

Both series are manufactured and 100% load-tested at our facility, with signed test certificates shipping with every unit. IP65 sealing is standard on both series for outdoor and agricultural applications.

The Key Differences: Torque, Frame Count, and Brand Compatibility

When to Choose the EP300R

The EP300R right angle planetary gearbox is the correct choice when the primary requirement is dimensional interchangeability with a European OEM brand. The EP300R is mapped against seven major brands — Bonfiglioli, Brevini Riduttori, Bosch Rexroth, Comer Industries, Reggiana Riduttori, Rossi, and Zollern. All 16 frame sizes (EP300R through EP321R) carry confirmed dimensional drawings against the corresponding frame in each brand’s catalogue.

For projects where the procurement specification states “equivalent to Bonfiglioli EQ4090” or “dimensional replacement for Brevini ED2150,” the EP300R series provides the documented cross-reference that satisfies the specification requirement — including mounting footprint drawings that can be submitted with the procurement documentation.

The EP300R also extends to higher torque ratings (up to 500,000 Nm at EP321R) than the NB300R — making it the only choice for right angle applications above 200,000 Nm in our standard range.

When to Choose the NB300R

The NB300R right angle planetary gearbox is optimised for new equipment design and direct OEM application rather than brand replacement. Without the requirement to match a specific European OEM dimensional footprint, the NB300R can be selected on torque rating, motor interface, and output shaft type alone — simplifying the ordering process and often reducing lead time compared to the EP300R.

For agricultural equipment manufacturers, greenhouse contractors, and industrial OEMs designing new products rather than maintaining existing machines, the NB300R offers the right angle functionality without the additional cross-reference premium of the EP300R. The NB300R covers 1,000–200,000 Nm across 8 standard frame sizes — a range that covers the majority of agricultural and light industrial right angle drive requirements.

For full specification details on each series, including complete torque tables, frame size dimensions, and motor interface options, visit the EP300R right angle planetary gearbox product page and the NB300R right angle planetary gearbox product page. Send your application requirements to [email protected] and receive a confirmed series recommendation with pricing within 24 hours.

Common Configuration Questions

Can either series accept a hydraulic orbit motor for agricultural applications? Yes — both the EP300R and NB300R accept hydraulic orbit motors via SAE A or SAE B flange input adaptors. This is the standard input configuration for agricultural and mobile equipment drive applications.

Can I order an EP300R in the same torque class as an NB300R and get a dimensionally identical unit? No — the EP300R and NB300R have different housing geometries optimised for their respective application focus. They are not dimensionally interchangeable at the same torque class. If you have an existing NB300R installation and need a replacement, order an NB300R replacement rather than an EP300R equivalent.

Are hollow-bore output shaft options available on both series? Yes — hollow bore with shrink disc is available on both the EP300R and NB300R series. Specify this at the time of order as it affects the housing length and the output flange configuration.