MFA 940D Series Fixed Ratio 32mm Diameter Epicyclic Geared Motor (RE 385 Motor)

Suitable for light industrial, educational, modelling and R&D applications. This combination of motor and gearbox has particular application where high torque with lower current consumption is required. It has a high quality 5 pole motor with carbon brushgear. It is of metal construction with a 6mm diameter output shaft with a key flat. For speed regulation see panel mounted PWM speed regulator, (see order code 37-1245)

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 940D series

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Technical Details
Questions (1)

Motor data
Type	Voltage	Motor output (max. efficency) (W)	Torque (max. efficiency) (g.cm)	Mftrs. part no.	Order Code
51:1 ratio	4.5 to 15V	7.98	78.4	940D511	37-1103
264:1 ratio	8 to 15V	7.98	78.4	940D2641	37-1091
721:1 ratio	4.5 to 15V	7.98	78.4	940D7211	37-1104

Reduction table (rpm)
Type	Supply Voltage (4.5V)	Supply Voltage (6V)	Supply Voltage (9V)	Supply Voltage (12V)	Supply Voltage (15V)
51:1 ratio	46	72	121	174	220
264:1 ratio	12	19	30.5	41	54.5
721:1 ratio	4.5	6.3	10.3	14.5	19

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20 March 2013 Question by: Rapid Customer | Product code: 37-1091

Q. Excuse my limited knowledge but I would have expected a motor with a higher gear ratio to have a higher torque. E.g the motor 37-1104 is listed to have the same torque as 37-1091? Is this correct?

A. Hi Brendan. Thank you for your question. This torque rating is at the maximum efficiency so this measurement is shown for each motor but they will be at different RPM and current rating, so they all meet this specification at a point in their running but the torque rating will vary for each motor at a different RPM and current rating. The table on the web site does not show this very clearly but if you look in the data sheets, it is more obvious.