Danfoss MAH 6.3, MAH 12.5 Data sheet

Data Sheet

Hydraulic motor - high speed

MAH 6.3 - MAH 12.5

hpp.danfoss.com

Data sheet | Motor, High Speed, MAH 6.3 and MAH 12.5

Application

Characteristic features

Application examples

MAH 6.3 and 12.5 are high-speed motors
operated by water hydraulics. The hydraulic
medium is ordinary tap water. The motors base
on the axial piston principle that enables a light
and compact design. The water lubricates all
movable parts in the motor, and there is thus no
need for special oil lubrication.

• Smooth running within a large operating
parameters.

• Constant torque over a wide speed range.

• High starting torque

• Long life under severe operating conditions.

• Compact design.

• For use in both open and closed systems.

• Food industry

• Mining equipment

• Humid and wet environments

• Pharmaceutical industry

The motors vary in size from 6.3 cm³ to 12.5 cm³
per revolution (rated displacement).

The maximum operating torques vary from

12.5 Nm to 25 Nm and maximum outputs from
5 kW to 8 kW.

• Quiet in operation.

• Few wear parts and low maintenance
costs.

• No oil lubrication.

• Non-corroding materials.

• Easy-to-clean design.

• Chemical industry

• Water treatment

• Nuclear industry

2 | © Danfoss | DCS (im) | 2019.09

AI318932232163en-001001 | 521B0750

Data Sheet | Motor, High Speed, MAH 6.3 and MAH 12.5

Technical data

Function principle

Type MAH 6.3 MAH 12.5
Code number - CW version 180F0003
Code number - CCW version 180F0105 180F0004
Geometric displacement (cm3) 6.3 12.5
Max. speed (min-1) kont. 4000* 3000
Min. speed (min
Max. torque (Nm) kont 12.5 25
Starting torque at max. pressure drop (Nm) kont 3.5 12.5
Starting pressure at unloaded shaft (bar) 80 50
Max. power at max. speed. (kW) kont 5.2 7.8
Max. pressure drop and inlet pressure (bar) kont 140* 140
Max. waterow (l/min) kont 26.8 40
Return line pressure at pin = 140 bar, no shaft load (bar) 80 50
Return line pressure at pin = 140 bar, max. shaft load (bar) 10 10

Max. system press.at serial operation, no shaft load

Drain ow at 140 bar/1500 min-1 (l/min) < 1 < 1.5
Weight kg 4.1 6.3

* MAH 6.3: ∆p (pressure drop) up to 3100 min-1 = 140 bar, there is then a linear reduction in ∆p to 100 bar at 4000 min-1

Water-hydraulic motors convert hydraulic energy

(pressure, water ow) to mechanical energy

-1)

(bar)
kont

300 300

115 105

Two sizes of housing cover the entire range: One
for 6.3 cm3 motors, and one 12.5 cm³ motors.

(torque, speed).

The axial piston principle gives a light and com-

Danfoss water-hydraulic motors are high-speed

pact design in relation to actual power output.
units with xed displacement. A given water ow
and a given pressure, determine the displace­ment (motor size), speed and torque. For a given

The motors are designed to ensure that all

moving parts are lubricated by water.
displacement (motor size) speed is determined
by the water ow and torque is determined by
the pressure.

Furthermore, the motor design is such that

ordinary drinking water is used, i.e. water with no

additives whatsoever.
The motors are axial piston units which operate
on the swashplate principle.

Direction of rotation

Connections and direction of rotation appear
from the product label on the motors (see also
the below drawing).
The motors can be reversed for shorter periods,
but will run with slightly less eciency and
starting torque.

If reversible operation for longer periods is

required, please contact your loacl Danfoss Sales

representative.

© Danfoss | DCS (im) | 2019.09

AI318932232163en-001001 | 521B0750 | 3