SKF 305256 D Angular Contact Ball Bearing 120 × 190 × 66 mm

Double row angular contact ball bearing with two-piece inner ring and relubrication feature

Angular Contact Ball Bearing

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Category: Angular Contact Ball Bearing
Dimensions: 120x190x66mm

Overview

Double row angular contact ball bearing with two-piece inner ring and relubrication feature

Double row angular contact ball bearing, with two-piece inner ring and relubrication feature, correspond to a pair of single row angular contact ball bearings in a back-to-back arrangement. The two-piece inner ring enables incorporation of more balls, resulting in higher load carrying capacity. The annular lubrication groove and holes in the outer ring facilitates relubrication.

Key features

Accommodate very high axial loads in both directions, radial loads, and tilting moments
Relubrication feature
Suitable where a stiff bearing arrangement is required
Require less axial space than equivalent pair of single row angular contact ball bearings

Typical applications

Machine tool spindles and support shafts
Pumps and compressors
High-speed motors
Precision gearboxes and robot drives

Selection guidance

Select by contact angle, arrangement, preload, precision class, axial load direction, and operating speed.

Symbol	Value	Description
C	182 kN	Basic dynamic load rating
C0	232 kN	Basic static load rating
reference_speed_rpm	3 400 r/min	Reference speed
limiting_speed_rpm	3 600 r/min	Limiting speed

Symbol	Value	Description
d	120 mm	Bore diameter
D	190 mm	Outside diameter
B	66 mm	Width
α	32 °	Contact angle

Symbol	Value	Description
da	min. 125 mm	da
Da	max. 170 mm	Da
ra	max. 2 mm	ra

Accommodates very high axial loads, radial loads and tilting moments in both directions
Relubrication feature
Suitable where a strong bearing arrangement is required
Requires less axial space than a corresponding pair of single-row angular contact ball bearings

Code	Description
접촉 유형	Normal contact (four-point contact)
열 개수	2
로케이팅 기능, 베어링 외륜	None
링 유형	Two-piece inner ring and one-piece outer ring
케이지	Machined brass
접촉각 배열(복열 베어링)	Back-to-back (O)
일치된 배열	No
유니버설 매칭 베어링	No
축방향 내부틈새	NSTD
소재, 베어링	Bearing steel
코팅	None
씰링	None
윤활유	None
재윤활 기능	Included
제품 순 중량	6.99 kg
eClass 코드	23-05-08-03
UNSPSC 코드	31171531

datasheet pdf download

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