28BYJ-48 Geared Stepper Motor, 28BYJ-48

The 28BYJ-48 geared stepper motor (28BYJ-48) has a body 28 mm across and 19 mm high, with 4.2 mm mounting holes 35 mm apart. Its 5 mm shaft, flatted to 3 mm, sits 8 mm off the body's centre. Modeled as simplified STEP files.

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

• Also searched as: 28BYJ-48 stepper motor
• Model id: geared-steppers-28byj48
• Standard: 28BYJ-48 · size 28BYJ-48

Files

Part key	Simplified
geared-steppers-28byj48	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
D	Body diameter		28		28	nominal	L1
H	Body height		19		19	nominal	L1
A	Mounting hole spacing		35		35	nominal	L1
dh	Mounting hole diameter		4.2		4.2	nominal	L1
Re	Ear end radius		3.5		3.5	nominal	L1
we	Ear width		7		7	nominal	L1
e	Shaft offset		8		8	nominal	L1
db	Boss diameter		9		9	nominal	L0 (nom: one source)
hb	Boss height		1.5		1.5	nominal	L1
ds	Shaft diameter		5		5	nominal	L1
sf	Shaft across flats		3		3	nominal	L1
ls	Shaft length		10		10	nominal	L1
lf	Flat length		6		6	nominal	L1
wb	Wiring box width		14.6		14.6	nominal	L1
xb	Wiring box extent		17.5		17.5	nominal	L1
sb	Wiring box set-back		2.7		2.7	nominal	L0 (nom: one source)
ll	Lead length		300		300	nominal	L1

Drawing

As a PDF: CC-BYJ48-SZ-28BYJ48.pdf.

Documents

• CC-BYJ48-DS-28BYJ48.pdf: 28BYJ48 datasheet: values with levels, sources
• CC-BYJ48-SZ-28BYJ48.pdf: 28BYJ48 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

fulling-28byj48, kiatronics-28byj48. Full citations: the method page and this size's datasheet.

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