8x42 Stepper Motor (NEMA Stepper), NEMA ICS 16

The 8x42 stepper motor (NEMA ICS 16): body length 42 mm, body square up to 20.3 mm, mounting hole spacing 16 mm. Available as simplified STEP files.

How these parts are made, and what the levels mean: read the method

• Also searched as: 8x42 stepper motor
• Model id: nema-steppers-8x42
• Standard: NEMA ICS 16 · size 8x42

Files

Part key	Simplified
nema-steppers-8x42	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
L	Body length		42		42	nominal	L0 (nom: one source)
BD	Body square			20.3	20.3	single limit (max), modeled at the limit	L1
A	Mounting hole spacing		16		16	nominal	L1
nh	Number of mounting holes		4		4	nominal	L1
dt	Mounting hole thread		2		2	nominal	L1
N	Pilot diameter		16		16	nominal	L1
T	Pilot height		1.5		1.5	nominal	L1
D	Shaft diameter		4		4	nominal	L1
E	Shaft length		10		10	nominal	L1
F	Shaft flat		3.5		3.5	nominal	L0 (nom: one source)
Lf	Flat length		7		7	nominal	L0 (nom: one source)

Drawing

As a PDF: CC-NEMA-SZ-8x42.pdf.

What each maker states

• Mounting hole spacing A: makers range from 15.4 to 16 mm (Leadshine 15.4 mm, MOONS' 16 mm). The model uses the largest stated, 16 mm, so check your own motor's drawing before drilling a plate for it.

The 8x42 stepper motor beside the 8x30 and the 8x48

The 8x42 is number 2 of the 19 NEMA ICS 16 stepper motors published here, listed from 8x30 to 34x118.

• Body length (L): 42 mm on the 8x42 stepper motor, against 30 mm on the 8x30 and 48 mm on the 8x48.
• Body square (BD): up to 20.3 mm on the 8x42 stepper motor, the same on the 8x30 and the 8x48.
• Mounting hole spacing (A): 16 mm on the 8x42 stepper motor, the same on the 8x30 and the 8x48.
• Number of mounting holes (nh): 4 on the 8x42 stepper motor, the same on the 8x30 and the 8x48.
• Mounting hole thread (dt): 2 mm on the 8x42 stepper motor, the same on the 8x30 and the 8x48.
• Pilot diameter (N): 16 mm on the 8x42 stepper motor, the same on the 8x30 and the 8x48.
• Pilot height (T): 1.5 mm on the 8x42 stepper motor, the same on the 8x30 and the 8x48.
• Shaft diameter (D): 4 mm on the 8x42 stepper motor, the same on the 8x30 and the 8x48.

Other sizes

• One size smaller: 8x30 Stepper Motor (NEMA Stepper), NEMA ICS 16.
• One size larger: 8x48 Stepper Motor (NEMA Stepper), NEMA ICS 16.

Documents

• CC-NEMA-DS-8x42.pdf: 8x42 datasheet: values with levels, sources
• CC-NEMA-SZ-8x42.pdf: 8x42 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

anaheim-08y, leadshine-cm-steppers, moons-hybrid-steppers-figures, rule-nema-steppers-length. Full citations: the method page and this size's datasheet.

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