BK1312 Needle Bearing (Drawn Cup Needle Roller Bearing), ISO 3245

The BK1312 needle bearing (ISO 3245) has a 13 mm bore, a 19 mm outside diameter and a width of 12 mm. Get it as simplified STEP files.

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

• Also searched as: BK1312 bearing
• Model id: iso3245-bk1312
• Standard: ISO 3245 · size BK1312

Files

Part key	Simplified
iso3245-bk1312	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
Fw	Bore diameter under the rollers		13		13	nominal	L1
D	Outside diameter		19		19	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-BK1312.pdf.

The BK1312 needle bearing beside the BK1212 and the BK1412

The BK1312 is number 15 of the 29 ISO 3245 needle bearings published here, listed from BK0306 to BK2526.

• Bore diameter under the rollers (Fw): 13 mm on the BK1312 needle bearing, against 12 mm on the BK1212 and 14 mm on the BK1412.
• Outside diameter (D): 19 mm on the BK1312 needle bearing, against 18 mm on the BK1212 and 20 mm on the BK1412.
• Width (C): 12 mm on the BK1312 needle bearing, the same on the BK1212 and the BK1412.
• Depth to the closed end (Ct): at least 9.3 mm on the BK1312 needle bearing, the same on the BK1212 and the BK1412.
• Chamfer dimension (r): at least 0.8 mm on the BK1312 needle bearing, the same on the BK1212 and the BK1412.

Other sizes

• One size smaller: BK1212 Needle Bearing (Drawn Cup Needle Roller Bearing), ISO 3245, 12 mm bore, 18 mm OD, 12 mm wide.
• One size larger: BK1412 Needle Bearing (Drawn Cup Needle Roller Bearing), ISO 3245, 14 mm bore, 20 mm OD, 12 mm wide.

Documents

• CC-ISO3245-BK-DS-BK1312.pdf: BK1312 datasheet: values with levels, sources
• CC-ISO3245-BK-SZ-BK1312.pdf: BK1312 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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