3309 Double Row Angular Contact Ball Bearing 45*100*39.7mm  SUNBEARINGProduct Specification

Bore diameter:	45 mm	Static Load Rating	17600 lbf 78500 N 78.50 kN
Outside diameter:	100 mm	Dynamic Load Rating	16400 lbf 73000 N 73.00 kN
Overall width:	39.7 mm	Operating Temperature Range	-40 to 250 ºF -40 to 120 ºC
Rows of Balls	Double	Reference speed	7500 r/min
Outer ring type:	UnSplit	Limiting speed	6700 r/min
Internal clearance:	CN	Mass	1.25 Kgs
Closure type:	Open	Contact Angle	32 º
Material	High Carbon Chrome Steel	da min	54 mm
Precision	Class 0	ra max	1.5 mm
Configuration	Two	Da max	91 mm

3309 Bearing Short Description

3309 bearing double row angular contact bearings are designed to work as two single row angular contact bearings but take up less axial space. They can accommodate radial loads and axial loads in both directions. The bearings have a 30-degree contact angle with the ball sets arranged back-to-back.

Cage material can be either metal (no suffix) or glass-reinforced polyamide with the suffix "TN9". Double Row Angular Contact bearings are available in open design (no seals or shields) or with Metal Shields "2Z" and Rubber Seals "2RS1". The shielded and sealed bearings come pre-greased with high-quality NLGI class 3 grease with a temperature range of -30 to +120 degree C and are marked with the suffix "MT33".

3309 Angular Contact Ball Bearing Features

The design of double row angular contact ball bearings is basically the same as that of single row angular contact ball bearings but only takes up a smaller axial space. Double row angular contact ball bearings can bear radial load and axial load acting in two directions, and it can limit the axial displacement of the shaft or housing in both directions. A bearing configuration with higher rigidity can be provided and can withstand the overturning moment.

Double row angular contact ball bearings can withstand larger radial loads, mainly combined radial and axial loads and moment loads, limiting the axial displacement of the shaft on both sides. Mainly used in components that limit the bidirectional axial displacement of the shaft and the housing.

3309 Bearing Application

Compared with single row angular contact ball bearings, double row angular contact ball bearings have better rigidity and can withstand overturning moments. The bearing is non-separable. Especially suitable for applications with high rigidity requirements. Widely used in front-wheel hubs of cars (some models also use double row tapered roller bearings of the same size)