BK2520 Needle Bearing (Drawn Cup Needle Roller Bearing), ISO 3245

For a 25 mm shaft and a 32 mm housing bore, the BK2520 needle bearing (ISO 3245) is 20 mm wide. Modeled as simplified STEP files.

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

• Also searched as: BK2520 bearing
• Model id: iso3245-bk2520
• Standard: ISO 3245 · size BK2520

Files

Part key	Simplified
iso3245-bk2520	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
Fw	Bore diameter under the rollers		25		25	nominal	L1
D	Outside diameter		32		32	nominal	L1
C	Width		20		20	nominal	L1
Ct	Depth to the closed end	17.3			17.3	single limit (min), modeled at the limit	L1
r	Chamfer dimension	0.8			0.8	single limit (min), modeled at the limit	L1

Drawing

As a PDF: CC-ISO3245-BK-SZ-BK2520.pdf.

The BK2520 needle bearing beside the BK2516 and the BK2526

The BK2520 is number 28 of the 29 ISO 3245 needle bearings published here, listed from BK0306 to BK2526.

• Bore diameter under the rollers (Fw): 25 mm on the BK2520 needle bearing, the same on the BK2516 and the BK2526.
• Outside diameter (D): 32 mm on the BK2520 needle bearing, the same on the BK2516 and the BK2526.
• Width (C): 20 mm on the BK2520 needle bearing, against 16 mm on the BK2516 and 26 mm on the BK2526.
• Depth to the closed end (Ct): at least 17.3 mm on the BK2520 needle bearing, against at least 13.3 mm on the BK2516 and at least 23.3 mm on the BK2526.
• Chamfer dimension (r): at least 0.8 mm on the BK2520 needle bearing, the same on the BK2516 and the BK2526.

Other sizes

• One size smaller: BK2516 Needle Bearing (Drawn Cup Needle Roller Bearing), ISO 3245, 25 mm bore, 32 mm OD, 16 mm wide.
• One size larger: BK2526 Needle Bearing (Drawn Cup Needle Roller Bearing), ISO 3245, 25 mm bore, 32 mm OD, 26 mm wide.

Documents

• CC-ISO3245-BK-DS-BK2520.pdf: BK2520 datasheet: values with levels, sources
• CC-ISO3245-BK-SZ-BK2520.pdf: BK2520 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

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

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