# 28BYJ-48 5 V Geared Stepper (1/16)

> 28BYJ-48 5 V unipolar geared stepper (Adafruit 858): 32 steps (11.25°) × 1/16.128 gearbox = 516 steps per output revolution, ~42 Ω per winding, 150 gf·cm (15 N·mm) holding torque, ~6 RPM at 5 V, Ø28 × 19 mm can with two Ø4.2 mm ears on 35 mm centres, Ø5 mm flatted shaft, 5-wire JST XH lead (23 cm), 37 g. The cheapest stepper to learn on.

- Manufacturer: Adafruit Industries
- Part number: 28BYJ-48
- Category: Motors
- Canonical page: https://www.xirkit.io/products/adafruit-28byj-48-5-v-geared-stepper-1-16-83ef
- Pinout: https://www.xirkit.io/products/adafruit-28byj-48-5-v-geared-stepper-1-16-83ef/pinout
- Structured JSON: https://www.xirkit.io/products/adafruit-28byj-48-5-v-geared-stepper-1-16-83ef/data.json
- Source: Xirkit structured parts catalog — every value traced to a cited document; unknowns are explicit.

## Key specifications

| Property | Value |
| --- | --- |
| Motor type | stepper |
| Rated voltage | 5 V |
| Holding torque | 0.015 N·m |
| Rated current | 0.12 A |
| Gear ratio | 16.128:1 |
| Step angle | 11.25° |
| Shaft diameter | 5 mm |
| Dimensions | 42 × 28 × 29 mm |

## Pinout (5 pins, 0 with electrical limits)

| Pin | Position | Kind | Chip pad | Functions | VIH | VIL | VOH | VOL | IOH | IOL | 5 V tolerant |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Orange | JST XHP-5 housing, pin 1 | phase a plus | — | orange | — | — | — | — | — | — | — |
| Pink | JST XHP-5 housing, pin 2 | phase a minus | — | pink | — | — | — | — | — | — | — |
| Red | JST XHP-5 housing, pin 3 (middle) | common | — | red | — | — | — | — | — | — | — |
| Blue | JST XHP-5 housing, pin 4 | phase b plus | — | blue | — | — | — | — | — | — | — |
| Yellow | JST XHP-5 housing, pin 5 | phase b minus | — | yellow | — | — | — | — | — | — | — |

## Where to buy

| Supplier | Price | Stock | Checked | URL |
| --- | --- | --- | --- | --- |
| www.adafruit.com | 4.95 USD | in_stock | 2026-10-01 | https://www.adafruit.com/product/858 |

## FAQ

**How much does the 28BYJ-48 5 V Geared Stepper (1/16) cost?**

From $4.95 at www.adafruit.com. Prices are observed unit prices before tax and shipping.

**What are the 28BYJ-48 5 V Geared Stepper (1/16) dimensions?**

42 × 28 × 29 mm. A STEP model is available for enclosure fit checks.

**Where does this 28BYJ-48 5 V Geared Stepper (1/16) data come from?**

Every value in this record is traced to a source — 2 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed.

## Sources

- [28BYJ-48 5 V Geared Stepper (1/16) datasheet](https://cdn-learn.adafruit.com/downloads/pdf/adafruit-arduino-lesson-16-stepper-motors.pdf)
- [www.adafruit.com listing](https://www.adafruit.com/product/858)