Orbital Hydraulic Motor – 16 GPM – 400 in3./rev. Displacement – SAE A, 2-Bolt, Pilot 3.25″ Mounting Flange – 1″ Splined SAE 6B Shaft – 7/8-14 UNF O-Ring Port – HMS-400-B2SS

Part HMS-400-B2SS
PID 4520

$533.84

Hyvair HMS orbital hydraulic motor for 10–16 GPM systems. HMS-400-B2SS features 400 displacement, SAE-A 2-bolt (3.25") mounting, 1" splined SAE 6B shaft and 7/8-14 UNF O‑ring ports. Compact, durable low-speed/high-torque design ideal for mobile and industrial applications requiring reliable, easy-to-mount power.
IH-00164
Weight24 lbs
Dimensions8.35 × 4.17 × 5.16 in

Description

The HYVAIR HMS Series Hydraulic Motors are compact, high-torque orbital motors engineered for reliable performance in demanding hydraulic systems. Designed for flows from 10 to 16 GPM, this series is ideal for applications requiring smooth, consistent power in a small footprint, such as mobile equipment, agricultural machinery, and industrial drives.

Featuring a 400 displacement option, these motors deliver strong low-speed torque and efficient power transmission, helping equipment start under load and maintain performance without stalling. The SAE-A 2-bolt mounting flange with 3.25″ pilot provides a standardized, secure interface that simplifies installation and interchangeability with common hydraulic configurations. A 1″ splined shaft ensures positive, slip-free torque transfer to driven components, supporting long-term durability under shock loads and reversing duty.

The HMS Series uses 7/8-14 UNF O-ring ports for leak-resistant, high-pressure connections, promoting cleaner operation and reduced maintenance compared to tapered-thread alternatives. Built as orbital (gerotor-style) motors, they are designed for smooth, low-noise operation and precise control at low speeds, making them well-suited for applications where accurate, controllable motion is critical.

With rugged construction and a proven HYVAIR design, HMS Series Hydraulic Motors help minimize downtime and extend service life, delivering dependable power in a wide range of hydraulic circuits.

Related categories: Motors · HMS Series

Brand: Hyvair

In stock in Memphis, TN — ships fast. Call (901) 946-1500 for freight or a quote.

Specifications

Series
HMS Series
Displacement
24.52 in3./rev.
Maximum Speed
150 RPM
Maximum Torque
Cont. 3673 in/lbs - Int. 5098 in/lbs
Maximum Pressure
Cont. 1160 PSI - Int. 1595 PSI
Flow
15.9 GPM
Output
5 HP
Mounting Flange
SAE-A, 2 Bolt, Pilot 3.25"
Shaft
1” Splined SAE 6B
Port
7/8-14 UNF O-Ring

Product details

Part no.HMS-400-B2SS
IH-00164
PID4520
Shipping details
Weight24 lbs
Dimensions (in)8.35L × 4.17W × 5.16H

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