40x28 Cooling Fan (Computer Fan), DC axial fan

A 40 mm square cooling fan, 28 mm thick, with 3.5 mm mounting holes 32 mm apart. It comes as simplified STEP files.

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

• Also searched as: 40x28 fan
• Model id: fans-dc-axial-40x28
• Standard: DC axial fan · size 40x28

Files

Part key	Simplified
fans-dc-axial-40x28	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
a	Frame side		40		40	nominal	L1
t	Frame thickness		28		28	nominal	L1
e	Mounting hole spacing		32		32	nominal	L1
dh	Mounting hole diameter		3.5		3.5	nominal	L1

Drawing

As a PDF: CC-DCFAN-SZ-40x28.pdf.

From the maker's data sheet

As written on the Mechatronics data sheet for this frame (mechatronics-dc-axial), one of the sheets this size's dimensions come from: the series, its models and features.

• Series: MD4028
• Models: MD4028S, MD4028L, MD4028M, MD4028H, MD4028E, MD4028X, MD4028U, MD4028V
• Bearing option: ball bearing
• Construction: UL94V-0 PBT impeller & frame
• Connection: AWG 26, UL1007 lead wires
• Frame: ribbed
• Protection: thermal
• Options: tachometer output or locked rotor alarm signal; PWM speed control

The 40x28 cooling fan beside the 40x20 and the 50x10

The 40x28 is number 5 of the 18 DC axial fan cooling fans published here, listed from 25x10 to 120x38.

• Frame side (a): 40 mm on the 40x28 cooling fan, against 40 mm on the 40x20 and 50 mm on the 50x10.
• Frame thickness (t): 28 mm on the 40x28 cooling fan, against 20 mm on the 40x20 and 10.2 mm on the 50x10.
• Mounting hole spacing (e): 32 mm on the 40x28 cooling fan, against 32 mm on the 40x20 and 40 mm on the 50x10.
• Mounting hole diameter (dh): 3.5 mm on the 40x28 cooling fan, against 3.5 mm on the 40x20 and 4.3 mm on the 50x10.

Other sizes

• One size smaller: 40x20 Cooling Fan (Computer Fan), DC axial fan, 40 mm square, 20 mm thick.
• One size larger: 50x10 Cooling Fan (Computer Fan), DC axial fan, 50 mm square, 10.2 mm thick.

Documents

• CC-DCFAN-DS-40x28.pdf: 40x28 datasheet: values with levels, sources
• CC-DCFAN-SZ-40x28.pdf: 40x28 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

delta-dc-axial, mechatronics-dc-axial, sunon-dc-fan-255e. Full citations: the method page and this size's datasheet.

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