SCM 025-108 M2
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Sunfab’s SCM 025-108 M2 is a range of robust axial piston motors with cartridge flange especially suitable for winch-, slewing-, wheel- and track drives. Other advantages: SCM 025-108 M2 is of the bent-axis type with spherical pistons. The design results in a compact motor with few moving parts, high starting torque and high reliability. The SCM 025-108 M2 covers the entire displacement range 25108 cmᶟ ⁄rev. at a maximum pressure of 400 bar. • Smooth operation over the entire speed range • High maximum speed • High efficiency • Suitable for applications with high angular accelerations due to its high rotary stiffness It´s well dimensioned, double tapered roller bearings permit high shaft loads and lead to excellent speed characteristics. It´s high level of reliability is based on the choice of materials, hardening methods, surface structures and the quality assured manufacturing process. Motor SCM 025-108 M2 Displacement Working pressure max intermittent max continuous Revolutions max intermittent max continuous min continuous Power max intermittent max continuous Starting torque theoretical value Moment of inertia (x 10-3) Weight Data concerning RPM are based on maximum premitted peripheral velocity of the tapered roller bearing. Max intermittent power data may vary dependent on application. For further information please contact Sunfab. Continuous power data are based on maximum output power without external cooling of the motor housing. Intermittent duty is defined as follows: max 6 seconds per minute, e g peak RPM when unloading or accelerating. GB - Printed: 04/02/2014 06:00:35 - Page 1/8 Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: +46 650-367 00, Fax: +46 650-367 27, E-mail: sunfab@sunfab.se Web: www.sunfab.com

VERSIONS, MAIN DATA Example SC Sunfab Compact, bent-axis design 90° Mount flange vertical * 90° Mount flange horizontal * Nitrile High pressure, nitrile Viton External drainage X = Standard, preferred (X) = Available, option O = Available on request, contact Sunfab GB - Printed: 04/02/2014 06:00:35 - Page 2/8 Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: +46 650-367 00, Fax: +46 650-367 27, E-mail: sunfab@sunfab.se Web: www.sunfab.com

GB - Printed: 04/02/2014 06:00:35 - Page 3/8 Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: +46 650-367 00, Fax: +46 650-367 27, E-mail: sunfab@sunfab.se Web: www.sunfab.com

GB - Printed: 04/02/2014 06:00:35 - Page 4/8 Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: +46 650-367 00, Fax: +46 650-367 27, E-mail: sunfab@sunfab.se Web: www.sunfab.com

The drainage oil should have a maximum temperature of 75 °C with a Nitrile shaft seal and 90 °C with a Viton shaft seal. These temperatures must not be exceeded. The housing pressure must be equal to or greater than the external pressure on the shaft seal. Factors affecting the choice of shaft seal include the hydraulic motor housing pressure and the drainage oil temperature. Shaft loads The life of the motor is highly dependent on the bearing life. The bearings are affected by operating conditions such as speed, pressure, oil viscosity and filtration. External load on the shaft, as well as...

Excessive system temperature reduces the life of the shaft seal and can lower the oil viscosity below the recommended level. A system temperature of 60 °C and a drain flow temperature of 90 °C must not be exceeded. Counter pressure valve Cooling/flushing of the motor housing can be needed to keep the drain flow temperature at an acceptable level. Suggested flow: Flushing l/min 2-8 4-10 6-12 Counter pressure valve Flushing valve Housing flushing can be built up with the help of a flushing valve or taken directly from the return line. When the return pressure is too low this is compensated...

Hydraulic fluids Recommended oil velocity in pressure line max. 7 m/sec High performance oils meeting ISO specifications – such as HM, DIN 51524-2 HLP, or better – must be used. A min. viscosity of 10 cSt is required to keep the lubrication at a safe level. Cleanliness according to ISO norm 4406, code 16/13. Additional technical data Noise levels and bearing life calculations available on request. Please contact Sunfab! Useful formulaes Required flow rate Q = D = displacement, cm3⁄revolution n = speed, revolution⁄min P = power, kW Q = flow rate, litres⁄min ηv = volumetric efficiency ηhm =...

WARNING When the motor is in use: 1. Do not touch the pressure pipe 2. Beware of rotating parts 3. The motor and pipes can reach high temperatures Sunfab reserves the right to make changes in design and dimensions without notice. Printing and typesetting errors reserved. GB - Printed: 04/02/2014 06:00:35 - Page 8/8 Sunfab Hydraulics AB, Box 1094, SE-824 12 Hudiksvall, Sweden. Tel: +46 650-367 00, Fax: +46 650-367 27, E-mail: sunfab@sunfab.se Web: www.sunfab.com