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MFA 1.5-3V Medium Multi Ratio Motor Gearbox

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Quoting product code: WC66W

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About this product

Overview

  • Pre-assembled motor and gearbox unit
  • Great for use in models, robots and education
  • Operating voltage between 1.5V and 3V

Product overview

• Pre-assembled motor and gearbox unit
• Great for use in models, robots and education
• Operating voltage between 1.5V and 3V
• Six different ratios to choose from
• Speeds of up to 7,800 rotations per minute
• Torque of up to 20gf.cm

What power does this gearbox ratio need?

Using a 1.5 to 3V battery this motor is capable of between one and 7,800 rotations per minute and can be run in either direction by reversing the input polarity. The motor can be set up for six different ratios - 4:1, 16:1, 64:1, 256:1, 1024:1 and 4096:1 and has torque of 20gf.cm at maximum efficiency.

Why use a multi ratio gearbox?

With our range of multi ratio gearboxes you have versatility for whatever project you create from robots to clocks and lots in between. With multiple ratios and speeds per gearbox you can customise to fit your project exactly. Four mounting holes make it easy to mount and the gearbox comes pre-assembled so there is no hassle putting it together. A 3mm diameter shaft can easily connect to the rest of your system. Extra gears and shafts are available, 2.9mm gears will be tight (fixed) and will rotate with the shaft whilst the 3.1mm gears will be loose and spin independently of the shaft.

(Motor speeds may vary by ±12.5%)

Compatible accessories
MFA Small 1.5-3V 12200 rpm motor <HA82D>
MFA Gear Multipack <WC78K>
MFA Spur Gears Multipack <>
MFA 2-3 mm Inline Coupling <WC69A>
MFA 3-3 mm Inline Coupling <WC67X>
MFA Worm Drive Kit <WC80B>
MFA Rack and Pinion Set <WC77J>
MFA Chain and Sprocket Set <WC79L>

Rated 3 out of 5 by from No instructions! Although this is clearly a great little geared motor, there is absolutely no guidance on how to set the gears for different output speeds. Very difficult, trial and error.
Date published: 2017-10-18
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Specification

Specifications
Product code 920D/A (with RE-280 motor)
Supply voltage DC 1.5 V - 3 V
Speed at max efficiency 7800 rpm @ 3V
1150 rpm (4:1)
287 rpm (16:1)
72 rpm (64:1)
18 rpm (256:1)
4 rpm (1024:1)
1 rpm (4096:1)
Speed at 3 V 2300 rpm (4:1)
575 rpm (16:1)
144 rpm (64:1)
36 rpm (256:1)
9 rpm (1024:1)
2 rpm (4096:1)
Current at max efficiency 0.85 A @ 3 V
Output power at max efficiency 1.60 W @ 3 V
Torque 20 g.cm (0.002 Nm)
Gearbox ratio 4:1, 16:1, 64:1, 256:1, 1024:1, 4096:1
Shaft diameter 3 mm
Weight 76 g
Dimensions 53 mm x 30 mm x 54 mm (110 mm including shaft)

How do you select what ratio to use on this product? Is it done by adjusting the cogs or do you need another product/input to set the speed? Thank you

Asked by: Ellie
With multiple ratios and speeds per gearbox you can customise to fit your project exactly. Four mounting holes make it easy to mount and the gearbox comes pre-assembled so there is no hassle putting it together. A 3mm diameter shaft can easily connect to the rest of your system. Extra gears and shafts are available, 2.9mm gears will be tight (fixed) and will rotate with the shaft whilst the 3.1mm gears will be loose and spin independently of the shaft.
Answered by: Dominic
Date published: 2016-09-08

What battery do I need and where does it fit in assembly?

Asked by: Lesb
Using a 1.5 to 3V battery this motor is capable of between one and 7,800 rotations per minute and can be run in either direction by reversing the input polarity. This is just a motor and gear box you would select a suitable battery box for the project you are building.
Answered by: Dominic
Date published: 2016-05-18
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