Industry Schools FE/HE Site: Industry Site: Schools Site: FE/HE Site: Mobile
{{ SessionBasket.ItemCount }}
Total: {{CurrencyCode == 'EUR' ? '€' : CurrencyCode == 'USD' ? '$' : '£'}}{{ IncVat ? SessionBasket.GoodsTotalIncVat : SessionBasket.GoodsTotalText }} Basket is empty.
Sign In/Register

  • Suggested Queries


MFA 918D Series Fixed Ratio 25mm Diameter Spur Geared Motors

MFA Brand: MFA
<p>Suitable for light industrial, educational, modelling and R&amp;D applications. They are of metal construction and fitted with quality 3 pole motors with carbon brushgear. Available in 1.5-3V or 12-24V options, they have 4mm diameter central output shafts with key flats. <BR><BR>For speed regulation see panel mounted PWM speed regulator (see order code <STRONG>37-1245</STRONG>). (Not for use below 6V operation)</p>
  • Designed for heavy duty industrial and model applications.
  • Robust unit boasts a powerful high quality motor
  • Sintered Steel bearings
  • Precious metal motor brushes
  • No maintenance is required
  • Gears are equally efficient in either direction
  • 3 versions available (please see specification or price panel)
  • MFA/Como 918D series
Motor data
TypeVoltageMotor output (max. efficency) (W)Torque (max. efficiency) (g.cm)Mftrs. part no.Order Code
15:1 ratio1.5 to 3V1.620918D15137-1085
15:1 ratio12 to 24V1.6225918D1511237-1086
30:1 ratio1.5 to 3V1.620918D30137-1226
30:1 ratio12 to 24V1.6225918D3011237-1228
100:1 ratio1.5 to 3V1.620918D100137-1222
100:1 ratio12 to 24V1.6225918D10011237-1224
250:1 ratio1.5 to 3V1.620918D250137-1087
250:1 ratio12 to 24V1.6225918D25011237-1088
500:1 ratio1.5 to 3V0.4420918D5001/137-1101
500:1 ratio12 to 24V1.6025918D500112/137-1102
1024:1 ratio1.5 to 3V1.620918D1024137-1089
1024:1 ratio12 to 24V1.6225918D102411237-1090

Reduction table (rpm)
TypeVoltageSupply Voltage (1.5V)Supply Voltage (3V)Supply Voltage (6V)Supply Voltage (12V)Supply Voltage (18V)Supply Voltage (24V)
15:1 ratio1.5 to 3V306613----
15:1 ratio12 to 24V--2805608401120
30:1 ratio1.5 to 3V153306----
30:1 ratio12 to 24V--140280420560
100:1 ratio1.5 to 3V4692----
100:1 ratio12 to 24V--4284126168
250:1 ratio1.5 to 3V1837----
250:1 ratio12 to 24V--17345067
500:1 ratio1.5 to 3V815----
500:1 ratio12 to 24V--7.5162533
1024:1 ratio1.5 to 3V4.59----
1024:1 ratio12 to 24V--371115
*Question functionality currently disabled


07 March 2013 Question by: Rapid Customer
Q. Please can you confirm the motor direction can be reversed.
A. Hi Marc. Thank you for your question. Switch the polarity and the motor can be reversed.


23 February 2013 Question by: Rapid Customer | Product code: 37-1085
Q. how do you change the gear ratio?
A. Hi Jaiseo. Thank you for your question. The gear ratio is fixed. However the speed can be altered within a certain range by varying the voltage input. The motors are available with different ratios but this cannot be changed. Select a motor with the closest ratio to the speed you require then regulate the voltage to fine tune exactly.