M257 PERMCO | Alldatasheet
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Technical content
257 SERIES MOTORS
MEDIUM DISPLACEMENT SLEEVE BUSHING MOTORS
257 SERIES FEATURES
Heavy duty sleeve bushing design in a medium frame size Cubic inch displacements from 1.29 through 6.43 Working pressure up to 3500 PSI Speeds up to 2400 RPM Torque up to 2300 in-lbs Doweled and high strength cast iron construction 100% factory tested High strength alloy steel gear and shaft sets A wide range of porting, mounting, and shaft options available Pressure balanced wear plates maintain high pump efficiency throughout all operating ranges Available in both single and tandem units
Dimensional Data (inches) A. See bushing series catalog for lengths and dimensions B. 0.50” plus gear width C. 5.49” plus gear width D. 10.85” plus total gear width Permco 1500 Frost Rd. P. O . B o x 2 0 6 8 Streetsboro, OH 44241 Phone 330-626-2801 Fax 330-626-2805 e-mail info@permco.com www.permco.com Permco TianJin Fluidpower Mfg. Fenghua Industrial Park 9th Avenue TEDA, China 300457 © Bulletin #09-257MA Permco (TianJin) Hydraulics Inc., Ltd.
236 Jinbindadao Free Trade Zone
TianJin Port, China A 3.49 .50 12.70 B 3.00 76.20 1.00 25.40 5.68 144.37 5.49 139.45 88.70 C A 10.85 257.59 3.49 88.70 .50 12.70 4.00 101.60 .50 12.70 2.36 59.94 .60 15.24 3.25 82.55 5.68 144.37 D 7.44 3.72 1.69 1.69 B B 4.06 3.19 e-mail technic@permcotj.com www.permcotj.comCopyright © 2009 Permco 900 1200 1500 1800 2100 2400 13.25 17.00 20.50 23.50 26.25 30.00 1242 1250 1237 1210 1180 1142 16.00 19.50 24.25 28.50 32.50 36.50 1605 1610 1605 1560 1522 1475 18.50 23.25 26.50 34.00 38.50 43.50 1950 1962 1980 1900 1840 1792 21.25 26.75 32.50 38.50 44.00 50.50 2142 2150 2132 2060 2005 1955 23.50 30.50 36.50 43.50 51.00 56.00 2262 2260 2230 2165 2100 2050 Speed (rpm) Flow (gpm) Torque (in-lb) 2.000”
3250 PSI 3000 PSI
3500 PSI3500 PSI
(gpm) Flow (gpm) Flow (gpm) Flow (gpm) Torque (in-lb) Torque (in-lb) Torque (in-lb) Torque (in-lb)
3500 PSI
26.50 33.50 41.00 48.50 56.25 63.50 2342 2340 2310 2229 2160 2107 28.50 36.50 45.00 53.50 62.50 69.00 2362 2360 2330 2260 2178 2128 Speed (rpm) Flow (gpm) Torque (in-lb) 2.250” 2.500”
2500 PSI2750 PSI
(gpm) Torque (in-lb) M257 Performance Data @ Rated Pressure Performance data given is based on a series of test with ISO 32 Oil @ 120 F and is not representative of any one unit. Pump dimensions shown; motor port end cover and bearing carrier dimensions may vary slightly; consult factory.