> **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 # 5303 Series Saturn Planetary Gear Motor (139:1 Ratio, 24mm Length 8mm REX Shaft, 130 RPM, 3.3 - 5V Encoder) **Type:** Product page · **SKU:** GB-5303-2402-0139 · **Brand:** [goBilda](https://core-electronics.com.au/brands/gobilda) **Page:** https://core-electronics.com.au/5303-series-saturn-planetary-gear-motor-1391-ratio-24mm-length-8mm-rex-shaft-130-rpm-33-5v-encoder.html ([markdown](https://core-electronics.com.au/5303-series-saturn-planetary-gear-motor-1391-ratio-24mm-length-8mm-rex-shaft-130-rpm-33-5v-encoder.html.md)) This 139:1 ratio 5303 Series Saturn Planetary Gear Motor consists of a 24V brushed DC motor driving a 36mm diameter planetary gearbox. It..... ## Pricing - **Price:** $114.95 (inc GST) — $104.50 AUD, exc GST - **Quantity discounts:** 10+ $99.27 (exc GST) · 25+ $94.05 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 1 today, and up to 90 more in 7–10 days. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=GB-5303-2402-0139:1` (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/GB-5303-2402-0139:1.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 This 139:1 ratio 5303 Series Saturn Planetary Gear Motor consists of a 24V brushed DC motor driving a 36mm diameter planetary gearbox. It runs at a no-load speed of 130 RPM when 24VDC is applied. While this motor’s nominal voltage is 24V, you can give it plenty of punch with the ever-convenient 20V power tool battery system! The positive drive 8mm REX™ shaft has compatibility with a huge variety of goBILDA® motion components. Additionally, this motor’s specially-designed gearbox head allows for direct attachment to goBILDA® components in numerous use-cases made possible by its convenient shape. The two power wires provide plug-and-play compatibility with goBILDA® motor controllers via 3.5 bullet connectors. You don’t need to use the encoder during normal operation, but you can tap into it with a JST XH plug to bring position and velocity control to your project. **WARNING: Stalling this motor may cause irreparable damage!**This motor is extremely high-power. Use extreme caution when using it in applications with hard limits, such as linear slides and rotating arms. ### Downloads - [ Spec Sheet ](https://core-electronics.com.au/attachments/localcontent/5303-2402-0139_spec-sheet_118736b3a2f.pdf) - [ STEP File ](https://core-electronics.com.au/attachments/localcontent/5303-2402-0139_254168d43bf.zip) ### Specs | Motor Size | RS-560 | |---|---| | Motor Type | Brushed DC | | Nominal Voltage | 24VDC | | Output Shaft | 8mm REX™, 23.5mm Length | | Gearbox Style | Planetary | | Nominal Gear Ratio | 139:1 | | Gear Ratio Formula | (1+(46/11)) \* (1+(46/11)) \* (1+(46/11)) | | Gear Material | Steel | | Wire Length | 470mm (including connectors) | | Wire Gauge | 18AWG | | Motor Connector Type | 3.5mm FH-MC Bullet Connectors | | No-Load Speed | 70 RPM @ 12VDC 120 RPM @ 20VDC 130 RPM @ 24VDC | | No-Load Current | 0.8A @ 12VDC 1A @ 20VDC 1.3A @ 24VDC | | Stall Torque | 3900 oz-in (281 kg.cm) @ 12VDC 5320 oz-in (383 kg.cm) @ 20VDC 6739 oz-in (485 kg.cm) @ 24VDC | | Stall Current | 30A @ 12VDC 45A @ 20VDC 60A @ 24VDC | | Maximum Duty-Cycle at Rated Torque | 25% on, 75% off (Maximum 15 minutes Continuous) | | Rated Torque | 701 oz-in (50.5 kg.cm) @ 12VDC 960 oz-in (68.8 kg.cm) @ 20VDC 1211 oz-in (87.2 kg.cm) @ 24VDC | | Speed at Rated Torque | 57 RPM @ 12VDC 98 RPM @ 20VDC 107 RPM @ 24VDC | | Current Draw at Rated Torque | 6A @ 12VDC 8A @ 20VDC 11A @ 24VDC | | Encoder Type | Relative, Quadrature | | Encoder Sensor Type | Magnetic (Hall Effect) | | Encoder Voltage Range | 3.3-5VDC | | Encoder Resolution | 3895.9 PPR at the Output Shaft | | Encoder Resolution Formula | (1+(46/11)) \* (1+(46/11)) \* (1+(46/11)) \* 28 | | Encoder Connector Type | 4-Pos JST XH \[FH-MC\] | | Weight | 544g | | IP | Patented | ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/G/B/GB-5303-2402-0139-1.jpg)