BK0408 Needle Bearing (Drawn Cup Needle Roller Bearing), ISO 3245

For a 4 mm shaft and an 8 mm housing bore, the BK0408 needle bearing (ISO 3245) is 8 mm wide. Modeled as simplified STEP files.

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

• Also searched as: BK0408 bearing
• Model id: iso3245-bk0408
• Standard: ISO 3245 · size BK0408

Files

Part key	Simplified
iso3245-bk0408	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
Fw	Bore diameter under the rollers		4		4	nominal	L1
D	Outside diameter		8		8	nominal	L1
C	Width		8		8	nominal	L1
Ct	Depth to the closed end	6.4			6.4	single limit (min), modeled at the limit	L1
r	Chamfer dimension	0.3			0.3	single limit (min), modeled at the limit	L1

Drawing

As a PDF: CC-ISO3245-BK-SZ-BK0408.pdf.

The BK0408 needle bearing beside the BK0306 and the BK0509

The BK0408 is number 2 of the 29 ISO 3245 needle bearings published here, listed from BK0306 to BK2526.

• Bore diameter under the rollers (Fw): 4 mm on the BK0408 needle bearing, against 3 mm on the BK0306 and 5 mm on the BK0509.
• Outside diameter (D): 8 mm on the BK0408 needle bearing, against 6.5 mm on the BK0306 and 9 mm on the BK0509.
• Width (C): 8 mm on the BK0408 needle bearing, against 6 mm on the BK0306 and 9 mm on the BK0509.
• Depth to the closed end (Ct): at least 6.4 mm on the BK0408 needle bearing, against at least 5.2 mm on the BK0306 and at least 7.4 mm on the BK0509.
• Chamfer dimension (r): at least 0.3 mm on the BK0408 needle bearing, against at least 0.3 mm on the BK0306 and at least 0.4 mm on the BK0509.

Other sizes

• One size smaller: BK0306 Needle Bearing (Drawn Cup Needle Roller Bearing), ISO 3245, 3 mm bore, 6.5 mm OD, 6 mm wide.
• One size larger: BK0509 Needle Bearing (Drawn Cup Needle Roller Bearing), ISO 3245, 5 mm bore, 9 mm OD, 9 mm wide.

Documents

• CC-ISO3245-BK-DS-BK0408.pdf: BK0408 datasheet: values with levels, sources
• CC-ISO3245-BK-SZ-BK0408.pdf: BK0408 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

koyo-bs007-bk, schaeffler-hr1-bk. Full citations: the method page and this size's datasheet.

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