## What are NEMA frame sizes?

Electrical motors NEMA frame dimensions.

NEMA Frame Designation | Frame Dimensions (inches) | |
---|---|---|

D | E | |

56C | 3 1/2 | 2 7/16 |

56H | 3 1/2 | 2 7/16 |

56HZ | 3 1/2 | 2 7/16 |

**Are all NEMA 17 stepper motors the same?**

The NEMA numbers define standard faceplate dimensions for mounting the motor. They do not define the other characteristics of a motor. Two different NEMA 17 motors may have entirely different electrical or mechanical specifications and are not necessarily interchangeable.

### How are stepper motors sizes?

Step motors are categorized by NEMA frame size, such as “size 11” or “size 23” or “size 34”. Generally speaking, a size 11 step motor means the mounting face of the motor is 1.1 inches square; A size 23 step motor is 2.3 inches square; A size 34 step motor is 3.4 inches square, etc.

**How big is a NEMA 17 motor?**

1.7 inch x 1.7 inch

NEMA 17 stepper motors are stepper motors with a 43.2mm x 43.2mm (1.7 inch x 1.7 inch) faceplate. They are heavier and larger than a NEMA 14, but their size is what ensures more room for higher torque. NEMA 17 is the most common size for stepper motors used in 3D printers.

## Is NEMA 17 bipolar or unipolar?

This NEMA 17-size hybrid stepping motor can be used as a unipolar or bipolar stepper motor and has a 1.8° step angle (200 steps/revolution). Each phase draws 1.2 A at 4 V, allowing for a holding torque of 3.2 kg-cm (44 oz-in).

**What is a motor frame size?**

The frame sizes that are normally associated with industrial fractional horsepower motors are 42, 48, and 56. In this case, each frame size designates a particular shaft height, shaft diameter, and face or base mounting hole pattern. Similarly, a 56 frame motor would have a shaft height of 3-1/2 inches.

### Is NEMA 17 stepper motor bipolar?

**What are the dimensions of a 56 frame motor?**

example, in the two-digit 56 frame, the “D” dimension is 3½”, 56 divided by 16 = 3½”. For the “D” dimension of a three-digit frame number, consider only the first two digits and use the divisor 4. In frame number 145, for example, the first two digits divided by the constant 4 is equal to the “D” dimension, 14 divided by 4 = 3½”. Similarly, the “D” dimension of a 213 frame motor is 5¼”, 21 divided by 4 = 5¼”.

## What is motor frame size?

frame sizes having two-digit designations as opposed to the three-digit designations that are found in Tables 1 and 2. The frame sizes that are normally associated with industrial fractional horsepower motors are 42, 48, and 56. In this case, each frame size designates a particular shaft height, shaft diameter, and face or base mounting hole

**What is an electric motor frame?**

purpose motors. The frame number specifies dimensions of a general purpose motor frame. Figure 2 is a view of the underside of an electric motor. The letters are NEMA standard letters and the actual dimensions for general purpose motors are shown in Table 1. The diameter of the bolt hole of the motor mounting bracket is letter H. The diameter is 1/32 of an in. larger than the

### What is a motor frame?

frame motor would have a shaft height of 3-1/2 inches. The largest of the current fractional horsepower frame sizes is a 56 frame which is available in horsepowers greater than those normally associated with fractionals. For example, 56 frame motors are built in horsepowers up to 3 HP and in some cases, 5 HP.