Products > GR01 DC Planetary Gearmotor (in 9.6V, 12V and 18V versions)
Motor Specifications
(Key values highlighted in green)| |
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Manufacturer ID |
HRS-550S |
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Nominal voltage: |
9.6V DC |
12V DC |
18V DC |
Operating voltage: |
3-14V | 4-17V | 6-25V |
No Load speed (min.): |
18,100rpm | 20,500rpm | 19,040rpm |
No Load Current: |
1.7A | 1.4A | 0.85A |
Stall Current*: |
85A | 72A | 61.6A |
Max. Efficiency Current: |
13.5A | 10A | 7.9A |
Max. Efficiency Power: |
79.4W | 83.0W | 103.5W |
Max. Efficiency Torque: |
440g-cm | 450g-cm | 600g-cm |
Max. Efficiency Torque after gearbox*: |
1.38Nm | 1.59Nm |
2.11Nm |
No Load speed after gearbox (measured): |
530rpm | 572rpm | 550rpm |
Stall torque*: |
3470g-cm | 3690g-cm | 5145g-cm |
Stall torque after gearbox*: |
12.3Nm (1.25kg-m) |
13.0Nm (1.33kg-m) |
18.1Nm (1.85kg-m) |
*extrapolated value, excluding losses
All values given for operation at the motor nominal voltage
Advice for using your motor
It is recommended to 'break-in' a new motor and gearbox before use, this is done by running for 3-4 minutes continuously in both directions (polarity one way then the other) at a low voltage (approx half nominal voltage). This ensures that all of the gears and bearings are running freely before being subjected to loading and that the motor brushes are well seated on the commutator.
All of the motors feature a built-in cooling fan and four radial air vents towards the rear of their bodies. These should be left uncovered to minimise risk of overheating - use mesh or a fine grill to provide some sheilding if you're worred about dirt/objects entering the motor. If you fully cover these vents you run the risk of overheating and we cannot provide replacements for motor failures caused because of this.
Discontinued - This item is
no longer available and final stocks have been sold. Click
here to see the GR02 gearmotor which replaces this item
If you have purchased a GR01 in the past, full spares stocks and customer support is available, please get in touch if you need anything. This motor will be superceded by the GR02 in late October (2012)
The
GR01
is a planetary gearbox and DC (direct current) electric motor combination designed to provide a high power, compact and easily mounted electric drivetrain solution. The motor is ideal for a wide range of applications from robotics through to special effects.Three different motor versions are available with identical body size and nominal operating voltages of 9.6V, 12V or 18V, please see the 'motor specifications' column for operating data for each of these motors.
A range of accessories are available for this motor including wheels and shaft mounting hubs which can be found here.
Gearbox Build Detail
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Size:45mm square, 145mm long (click below image to expand) |
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Mounting: |
Twelve 5mm threaded
brass inserts Four on the bottom face, four on the top face and four on the front face with the output shaft. |
Body construction: |
Three sections 45 x 45 x 13mm CNC machined Blue Nylon 6. 4pcs M4 High Tensile Steel bolts (3mm hexagon socket) |
Gearbox type: |
36:1 planetary/epicyclic, two-stage reduction, 6:1 then another 6:1 stage. All-steel gears |
Shaft type: |
From the front face: 15mm x 12mm diameter followed by 14mm x 3/8" UNF external thread with 5mm left-handed internal thread. Fits standard sized 3/8" cordless/power drill chucks |
Shaft support: |
Two 12mm deep-groove ball-bearings, 8mm wide each |
Total weight: |
515g (exc. leads, left-hand screw and UNF nut which are
included) |
The motor is supplied fully assembled with the gearbox lubricated (a lithium based grease) and a 20mm long left-hand screw included to fit the end of the output shaft. Also included are a single 3/8" UNF Nut and a 5mm penny washer.
The motor is available either with plain connecting tabs (as pictured in images above left), or soldered 200mm silicone insulated leads (black & red), or 100mm leads with a male 'Deans' type connector. Spare motors are available.