> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # 298:1 Micro Metal Gearmotor **Type:** Product page · **SKU:** POLOLU-1094 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/298-1-micro-metal-gearmotor.html ([markdown](https://core-electronics.com.au/298-1-micro-metal-gearmotor.html.md)) This gearmotor is a miniature (0.94" x 0.39" x 0.47"), high-quality, low-current motor with 297.92:1 metal gearbox, similar to Sanyo’s popular 12 mm gearmotors. These units have a 0.365"-long, 3 mm-diameter D-shaped output shaft. Key specs at 6 V: 45 RPM and 30 mA free-run, 40 oz-in (2.9 kg-cm) and 0.36 A stall. > ⚠ **Note:** The listed stall torques and currents are theoretical extrapolations; units will typically stall well before these points as the motors heat up. Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. The recommended upper limit for continuously applied loads is 4 kg⋅cm (55 oz⋅in), and the recommended upper limit for intermittently permissible torque is 8 kg⋅cm (110 oz⋅in). Stalls can also result in rapid (potentially on the order of seconds) thermal damage to the motor windings and brushes; a general recommendation for brushed DC motor operation is 25% or less of the stall current. ## Pricing - **Price:** $39.30 (inc GST) — $35.73 AUD, exc GST - **Quantity discounts:** 10+ $34.30 (exc GST) · 25+ $33.23 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 24 and Aug 26. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=POLOLU-1094:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/POLOLU-1094:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description ## Overview These tiny brushed DC gearmotors are intended for use at 6 V, though in general, these kinds of motors can run at voltages above and below this nominal voltage, so they should comfortably operate in the 3 – 9 V range (rotation can start at voltages as low as 0.5 V). Lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor. The micro metal gearmotors are available in a wide range of gear ratios—from 5:1 up to 1000:1—and offer a choice between three different motors: high-power (HP), medium-power (MP), and standard. With the exception of the 1000:1 gear ratio versions, all of the micro metal gearmotors have the same physical dimensions, so one version can be easily swapped for another if your design requirements change. Please see the [micro metal gearmotor comparison table](https://core-electronics.com.au/search/compare/60) for detailed specifications of all Pololu's micro metal gearmotors. This dynamically-sortable table can help you find the gearmotor that offers the best blend of speed, torque, and current-draw for your particular application. A more basic comparison table is available below. Some versions of the gearmotors are sold with an additional 1mm-diameter output shaft that protrudes from the rear of the motor. This 4.5mm-long rear shaft rotates at the same speed as the input to the gearbox and offers a way to add an encoder, such as Pololu's [magnetic encoder for micro metal gearmotors](https://core-electronics.com.au/magnetic-encoder-pair-kit-for-micro-metal-gearmotors-12-cpr-2-7-18v.html), to provide motor speed or position feedback. | Motor Type | Stall Current @ 6 V | No-Load Speed @ 6 V | Stall Torque @ 6 V | ![](https://core-electronics.com.au/media/remote_images/0J427.80_8TJC2e.jpg) Gearbox Shaft Only | ![](https://core-electronics.com.au/media/remote_images/0J2814.100_upcOok.jpg) Gearbox & Motor Shafts | |---|---|---|---|---|---| | high-power **(HP)** | 1600 mA | 6000 RPM | 2 oz-in | [5:1 micro HP](https://core-electronics.com.au/5-1-micro-metal-gearmotor-hp.html) | | | 3000 RPM | 4 oz-in | [10:1 micro HP](https://core-electronics.com.au/10-1-micro-metal-gearmotor-hp.html) | [10:1 micro HP](https://core-electronics.com.au/10-1-micro-metal-gearmotor-hp-with-extended-motor-shaft.html) | | 1000 RPM | 9 oz-in | [30:1 micro HP](https://core-electronics.com.au/30-1-micro-metal-gearmotor-hp.html) | [30:1 micro HP](https://core-electronics.com.au/30-1-micro-metal-gearmotor-hp-with-extended-motor-shaft.html) | | 625 RPM | 15 oz-in | [50:1 micro HP](https://core-electronics.com.au/50-1-micro-metal-gearmotor-hp.html) | [50:1 micro HP](https://core-electronics.com.au/50-1-micro-metal-gearmotor-hp-with-extended-motor-shaft.html) | | 400 RPM | 22 oz-in | [75:1 micro HP](https://core-electronics.com.au/75-1-micro-metal-gearmotor-hp.html) | [75:1 micro HP](https://core-electronics.com.au/75-1-micro-metal-gearmotor-hp-with-extended-motor-shaft.html) | | 320 RPM | 30 oz-in | [100:1 micro HP](https://core-electronics.com.au/100-1-micro-metal-gearmotor-hp.html) | [100:1 micro HP](https://core-electronics.com.au/100-1-micro-metal-gearmotor-hp-with-extended-motor-shaft.html) | | 200 RPM | 40 oz-in | [150:1 micro HP](https://core-electronics.com.au/150-1-micro-metal-gearmotor-hp.html) | | | 140 RPM | 50 oz-in | [210:1 micro HP](https://core-electronics.com.au/210-1-micro-metal-gearmotor-hp.html) | | | 120 RPM | 60 oz-in | [250:1 micro HP](https://core-electronics.com.au/250-1-micro-metal-gearmotor-hp.html) | | | 100 RPM | 70 oz-in | [298:1 micro HP](https://core-electronics.com.au/298-1-micro-metal-gearmotor-hp.html) | [298:1 micro HP](https://core-electronics.com.au/298-1-micro-metal-gearmotor-hp-with-extended-motor-shaft.html) | | 32 RPM | 125 oz-in | [1000:1 micro HP](https://core-electronics.com.au/1000-1-micro-metal-gearmotor-hp.html) | | | medium-power **(MP)** | 700 mA | 2200 RPM | 3 oz-in | [10:1 micro MP](https://core-electronics.com.au/10-1-micro-metal-gearmotor-mp.html) | [10:1 micro MP](https://core-electronics.com.au/10-1-micro-metal-gearmotor-mp-with-extended-motor-shaft.html) | | 730 RPM | 8 oz-in | [30:1 micro MP](https://core-electronics.com.au/30-1-micro-metal-gearmotor-mp.html) | | | 420 RPM | 13 oz-in | [50:1 micro MP](https://core-electronics.com.au/50-1-micro-metal-gearmotor-mp.html) | | | 290 RPM | 17 oz-in | [75:1 micro MP](https://core-electronics.com.au/75-1-micro-metal-gearmotor-mp.html) | [75:1 micro MP](https://core-electronics.com.au/75-1-micro-metal-gearmotor-mp-with-extended-motor-shaft.html) | | 220 RPM | 19 oz-in | [100:1 micro MP](https://core-electronics.com.au/100-1-micro-metal-gearmotor-mp.html) | [100:1 micro MP](https://core-electronics.com.au/100-1-micro-metal-gearmotor-mp-with-extended-motor-shaft.html) | | 150 RPM | 24 oz-in | [150:1 micro MP](https://core-electronics.com.au/150-1-micro-metal-gearmotor-mp.html) | | | 75 RPM | 46 oz-in | [298:1 micro MP](https://core-electronics.com.au/298-1-micro-metal-gearmotor-mp.html) | | | low-power | 360 mA | 2500 RPM | 1 oz-in | [5:1 micro](https://core-electronics.com.au/5-1-micro-metal-gearmotor.html) | | | 1300 RPM | 2 oz-in | [10:1 micro](https://core-electronics.com.au/10-1-micro-metal-gearmotor.html) | | | 440 RPM | 4 oz-in | [30:1 micro](https://core-electronics.com.au/30-1-micro-metal-gearmotor.html) | [30:1 micro](https://core-electronics.com.au/30-1-micro-metal-gearmotor-with-extended-motor-shaft.html) | | 250 RPM | 7 oz-in | [50:1 micro](https://core-electronics.com.au/50-1-micro-metal-gearmotor.html) | [50:1 micro](https://core-electronics.com.au/50-1-micro-metal-gearmotor-with-extended-motor-shaft.html) | | 170 RPM | 9 oz-in | [75:1 micro](https://core-electronics.com.au/75-1-micro-metal-gearmotor.html) | | | 120 RPM | 12 oz-in | [100:1 micro](https://core-electronics.com.au/100-1-micro-metal-gearmotor.html) | [100:1 micro](https://core-electronics.com.au/100-1-micro-metal-gearmotor-with-extended-motor-shaft.html) | | 85 RPM | 17 oz-in | [150:1 micro](https://core-electronics.com.au/150-1-micro-metal-gearmotor.html) | | | 60 RPM | 27 oz-in | [210:1 micro](https://core-electronics.com.au/210-1-micro-metal-gearmotor.html) | | | 50 RPM | 32 oz-in | [250:1 micro](https://core-electronics.com.au/250-1-micro-metal-gearmotor.html) | | | 45 RPM | 40 oz-in | [298:1 micro](https://core-electronics.com.au/298-1-micro-metal-gearmotor.html) | [298:1 micro](https://core-electronics.com.au/298-1-micro-metal-gearmotor-with-extended-motor-shaft.html) | | 14 RPM | 70 oz-in | [1000:1 micro](https://core-electronics.com.au/1000-1-micro-metal-gearmotor.html) | | **Note:** The 1000:1 gearmotors can generate enough torque to damage themselves. The stall torque values given for those two motors are theoretical, and Pololu strongly recommend you avoid stalling them. ## Details for item #1094 Exact gear ratio: (25×34×37×35×38) / (12×9×10×13×10) ~~ bb(297.92:1) ## Gearmotor Dimensions | ![](https://core-electronics.com.au/media/remote_images/0J430.610_ELicVd.png%3F0abbc4b8b0b4aba6b700f32139622cfd) | |---| | Micro metal gearmotor dimensions (units in mm). | The gearbox has a long (0.365" or 9.27 mm), 3 mm-diameter D-shaped metal output shaft, and the brass faceplate has two mounting holes threaded for [M1.6 screws](https://core-electronics.com.au/machine-screw-m1-6-3mm-length-phillips-6-pack.html) (1.6 mm diameter, 0.35 mm thread pitch). The gearmotor weighs approximately 0.35 oz (10 g). Versions with the extended motor shaft have a 1mm diameter round shaft that protrudes 4.5 mm from the rear of the motor, between the two motor terminals; this is not pictured in the above dimension diagram. In terms of size, these gearmotors are very similar to Sanyo’s popular 12 mm NA4S DC gearmotors, and gearmotors with this form factor are often referred to as N20 motors. The gearbox on the [1000:1](https://core-electronics.com.au/1000-1-micro-metal-gearmotor.html) and [1000:1 HP](https://core-electronics.com.au/1000-1-micro-metal-gearmotor-hp.html) micro metal gearmotors is 12.5 mm long. All of the other micro metal gearmotors have 9mm-long gearboxes, as shown in the above dimension diagram. ## Motor Accessories - **Wheels and hubs:** The micro metal gearmotor’s output shaft matches Pololu's assortment of [Pololu wheels](https://core-electronics.com.au/#) and the [Solarbotics RW2 rubber wheel](https://core-electronics.com.au/solarbotics-rw2-wheel-external-set-screw.html). You can also use Pololu's [Pololu universal mounting hubs](https://core-electronics.com.au/pololu-universal-aluminum-mounting-hub-for-3mm-shaft-2-56-holes-2-pack.html) to mount custom wheels and mechanism to the micro metal gearmotor’s output shaft. | \| [![](https://core-electronics.com.au/media/remote_images/0J900.200_rszdBm.jpg%3Fc87ab4360031baf5eeb7429cc32fd3af)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\| \| Pololu wheel 32×7mm on a micro metal gearmotor. \| | \| [![](https://core-electronics.com.au/media/remote_images/0J810.200_GySFUi.jpg%3F6ce1b06e144e260ca729dddbebbfcc2a)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\|---\| \| Pololu wheel 42×19mm with micro metal gearmotor. \| | \| [![](https://core-electronics.com.au/media/remote_images/0J1103.200_l3E7KZ.jpg%3F29a6bca6672e1ed883d67f0b35edc987)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\|---\| \| A pair of Pololu universal aluminum mounting hubs for 3 mm diameter shafts. \| | |---| | \| [![](https://core-electronics.com.au/media/remote_images/0J2598.200_tOKQAS.jpg%3Fad23083fc0bd834fa9c47a69655781a4)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\| \| Black Pololu 70×8mm wheel on a Pololu micro metal gearmotor. \| | \| [![](https://core-electronics.com.au/media/remote_images/0J2599.200_ySFDcI.jpg%3F1059f6537013d1c16ad233f4a13ee47c)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\|---\| \| Black Pololu 90×10mm wheel on a Pololu micro metal gearmotor. \| | \| [![](https://core-electronics.com.au/media/remote_images/0J3531.200_y2kRvS.jpg%3Fb751b5b109dc1b21d5a12ef607edcbca)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\|---\| \| Pololu 30T track set with drive sprocket mounted on a micro metal gearmotor to the left; idler sprocket is on the right. \| | |---| - **Mounting brackets:** Pololu's [mounting bracket](https://core-electronics.com.au/pololu-micro-metal-gearmotor-bracket-pair-black.html) (also available in [white](https://core-electronics.com.au/pololu-micro-metal-gearmotor-bracket-pair-white.html)) and [extended mounting bracket](https://core-electronics.com.au/pololu-micro-metal-gearmotor-bracket-extended-pair.html) are specifically designed to securely mount the gearmotor while enclosing the exposed gears. Pololu recommend the **extended** mounting bracket for wheels with recessed hubs, such as the Pololu wheel 42×19mm. Pololu's micro metal gearmotors will also work with Pololu's [15.5D mm metal gearmotor bracket pair](https://core-electronics.com.au/pololu-15-5d-mm-metal-gearmotor-bracket-pair.html). | \| [![](https://core-electronics.com.au/media/remote_images/0J1128.200_9mYqlg.jpg%3Fda2a3bb5266037b46895d14801aacbaa)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\| \| Black micro metal gearmotor mounting bracket pair with included screws and nuts. \| | \| [![](https://core-electronics.com.au/media/remote_images/0J1129.200_W8q60Y.jpg%3F69196bc32969a42c3777dd222537e220)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\|---\| \| White micro metal gearmotor mounting bracket pair with included screws and nuts. \| | \| [![](https://core-electronics.com.au/media/remote_images/0J803.200_Y9SCDm.jpg%3F7e24bb5c29a81d50fef6bd351819d525)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\|---\| \| Pololu micro metal gearmotor bracket extended with micro metal gearmotor. \| | |---| - **Quadrature encoders:** Pololu offer several [quadrature encoders](https://core-electronics.com.au/#) that work with Pololu's micro metal gearmotors. | \| [![](https://core-electronics.com.au/media/remote_images/0J1203.200_FavGnc.jpg%3F75503cf18b0c2ec3f08cbe089cd7f3b3)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\| \| Encoder for Pololu wheel 42×19mm with wheel, motor, and bracket. \| | \| [![](https://core-electronics.com.au/media/remote_images/0J4767.200_QrTd0z.jpg%3F4b1b4a352a5b65138785021302b907b2)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\|---\| \| Example of an installed micro metal gearmotor reflective optical encoder. \| | \| [![](https://core-electronics.com.au/media/remote_images/0J5832.200_eF4AQO.jpg%3F1a7afd1aeb0cd22d610efcf66847279c)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\|---\| \| Magnetic Encoder Kit for Micro Metal Gearmotors assembled with ribbon cable wires. \| | |---| - **Motor controllers and drivers:** Pololu have a number of motor controllers that make it easy to drive these micro metal gearmotors, including Pololu's [qik 2s9v1 dual serial motor controller](https://core-electronics.com.au/pololu-qik-2s9v1-dual-serial-motor-controller.html) and Pololu's programmable [Baby Orangutan](https://core-electronics.com.au/baby-orangutan-b-328-robot-controller.html) and [Orangutan SVP](https://core-electronics.com.au/orangutan-svp-1284-robot-controller-assembled.html) robot controllers. The qik 2s9v1 allows variable speed and direction control of two small, brushed DC motors using a simple serial interface; the Orangutans combine a programmable Atmel AVR microcontroller and dual motor driver all in a single package and make interfacing with the motor drivers simple when you use Pololu's Pololu AVR library. Pololu also carry a number of basic [motor drivers](https://core-electronics.com.au/#) suitable for use with these motors, including the [DRV8838 single-channel motor driver carrier](https://core-electronics.com.au/drv8838-single-brushed-dc-motor-driver-carrier.html), the [DRV8833 dual motor driver carrier](https://core-electronics.com.au/drv8833-dual-motor-driver-carrier.html), the [DRV8835 dual motor driver carrier](https://core-electronics.com.au/drv8835-dual-motor-driver-carrier.html), and the [TB6612FNG dual motor driver carrier](https://core-electronics.com.au/tb6612fng-dual-motor-driver-carrier.html). | \| [![](https://core-electronics.com.au/media/remote_images/0J1027.200_HlPAEh.jpg%3Fbc2a318c91211d6ef0f3f876b50d521e)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\| \| Pololu qik 2s9v1 dual serial motor controller. \| | \| [![](https://core-electronics.com.au/media/remote_images/0J661.200_iXK8Cy.jpg%3Fb09cb6fd7b8b5eae7660c7f643a03f48)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\|---\| \| Baby Orangutan B-48/B-168/B-328. \| | \| [![](https://core-electronics.com.au/media/remote_images/0J4052.200_d3n7CL.jpg%3Fe9766aa3cc0d8c6f7a9b29df4b9854a0)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\|---\| \| DRV8835 dual motor driver carrier. \| | |---| Pololu also incorporate these motors into some of Pololu's products, including Pololu's [3pi robot](https://core-electronics.com.au/pololu-3pi-robot.html) and [Zumo robot](https://core-electronics.com.au/zumo-robot-for-arduino-v1-2-assembled-with-75-1-hp-motors.html): | \| [![](https://core-electronics.com.au/media/remote_images/0J2415.250_jP6VJn.jpg%3F4f523fc7b561d69b453a7f38c8446991)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\| \| Pololu 3pi robot. \| | \| [![](https://core-electronics.com.au/media/remote_images/0J4110.250_mbyPRS.jpg%3Fa2562fe9f34e986d0d194118dcff0d58)![](https://core-electronics.com.au/media/remote_images/zoom-d0cfc0fffa825c4654893ef42b77cee3_x1CNqo.png)](https://core-electronics.com.au/#) \| \|---\|---\| \| Assembled Zumo robot with a Zumo Shield, Arduino Uno, and Zumo blade. \| | |---| ## Selecting the Right Gearmotor Pololu offer a wide selection of metal gearmotors that offer different combinations of speed and torque. Pololu's **[metal gearmotor comparison table](https://core-electronics.com.au/search/compare/51)** can help you find the motor that best meets your project’s requirements. | ![](https://core-electronics.com.au/media/remote_images/0J838.600_51B73x.jpg%3Ffc41071cc34361a828546fe0fcc0b14f) | |---| | Some of the Pololu metal gearmotors. | ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/2/9/298_1_micro_metal_gearmotor__pololu_1094__00.jpg)