BK1212 Needle Bearing (Drawn Cup Needle Roller Bearing), ISO 3245

For a 12 mm shaft and an 18 mm housing bore, the BK1212 needle bearing (ISO 3245) is 12 mm wide. Modeled as simplified STEP files.

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

• Also searched as: BK1212 bearing
• Model id: iso3245-bk1212
• Standard: ISO 3245 · size BK1212

Files

Part key	Simplified
iso3245-bk1212	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
Fw	Bore diameter under the rollers		12		12	nominal	L1
D	Outside diameter		18		18	nominal	L1
C	Width		12		12	nominal	L1
Ct	Depth to the closed end	9.3			9.3	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-BK1212.pdf.

The BK1212 needle bearing beside the BK1210 and the BK1312

The BK1212 is number 14 of the 29 ISO 3245 needle bearings published here, listed from BK0306 to BK2526.

• Bore diameter under the rollers (Fw): 12 mm on the BK1212 needle bearing, against 12 mm on the BK1210 and 13 mm on the BK1312.
• Outside diameter (D): 18 mm on the BK1212 needle bearing, against 16 mm on the BK1210 and 19 mm on the BK1312.
• Width (C): 12 mm on the BK1212 needle bearing, against 10 mm on the BK1210 and 12 mm on the BK1312.
• Depth to the closed end (Ct): at least 9.3 mm on the BK1212 needle bearing, against at least 8.4 mm on the BK1210 and at least 9.3 mm on the BK1312.
• Chamfer dimension (r): at least 0.8 mm on the BK1212 needle bearing, against at least 0.4 mm on the BK1210 and at least 0.8 mm on the BK1312.

Other sizes

• One size smaller: BK1210 Needle Bearing (Drawn Cup Needle Roller Bearing), ISO 3245, 12 mm bore, 16 mm OD, 10 mm wide.
• One size larger: BK1312 Needle Bearing (Drawn Cup Needle Roller Bearing), ISO 3245, 13 mm bore, 19 mm OD, 12 mm wide.

Documents

• CC-ISO3245-BK-DS-BK1212.pdf: BK1212 datasheet: values with levels, sources
• CC-ISO3245-BK-SZ-BK1212.pdf: BK1212 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.

Found an error? Use the feedback section on this page.