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Product List

Auto Bearings

		Front Wheel Hub Bearings
		Rear Wheel Hub Bearings
		Tensioner&Idler Bearings
		Clutch Release Bearings
		Wheel Hub Bearing(One Generation)
		Wheel Hub Bearing( second generation)
		Wheel Hub Bearing ABS System
		Water Pump Bearing
		Automotive Tapered Roller Bearings
		Steering Wheel Bearings
		Universal Joint Kits
		Automobile Center Support Bearing
		Steering Gear Box Bearings
		Special Non Standard Auto Bearing
		Automobile Alternator Bearing
		Automotive Air Condition Bearings

Industry Bearing

		Deep Groove Ball Bearings
		Angular Contact Ball Bearing
		Cylindrical Roller Bearings
		Self-Aligning Ball Bearing
		Spherical Roller Bearings
		Tapered Roller Bearings
		Bearing Units
		Thrust Bearings
		Needle Roller Bearings
		Linear Bearings
		Special Non Standard bearings

Power Transmission Parts

		Ball leading Screw
		Linear Motion Shaft
		Linear Guide Rail and Block Assemblies
		Precise Crossing Guide Rail

Auto Steering Gears

		Worm and level Steering Gears
		Rack and Pinion Type Steering Gears
		Recirculating Ball Type Steering Gears

Industry News

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Current Location: Home >> Basic Technical Parameter >> Bearing Overview

Basic Technical Parameter

Single-row deep groove ball bearings are the most common type of rolling bearing, having a wide range of suitable applications. The raceway grooves on both inner and outer rings have circular arcs of slightly larger radius than that of the balls. In addition to radial loads, axial loads can be applied in either direction. Because of their low torque, they offer high speed operation with low power loss. Miniature and instrument bearings are made with very high levels of precision, therefore these are generally used in applications where accurate rotational performance and low torque is necessary, and load capacity is a secondary issue

COMPONENT INDENTIFICATION

BEARING TYPES


Standard Open		Standard Shielded

Flanged Open		Flanged Shielded

BEARING NOMENCLATURE

BASIC DIMENSIONS
Symbol	Description
d	Bearing bore
D	Bearing outer diameter
Df	Flange diameter
W	Open bearing width
Ws	Shielded bearing width
Wi	Extended inner race width (open)
Wis	Extended inner race width (shielded)
Wf	Flange width (open)
Wis	Flange width (shielded)
li	Land diameter (inner race)
lo	Land diameter (outer race)
r	Max. mating fillet radius (typical)
H	Thrust bearing height
OTHER PARAMETERS
Symbol	Description
Dw	Ball diameter
N	Number of balls per row
Ri	Raceway radius (inner race)
Ro	Raceway radius (outer race)
fi	Raceway curvature ratio (inner race)
fo	Raceway curvature ratio (outer race
B	Total bearing raceway curvature
∆r	Radial play
∆a	Axial play

OTHER PARAMETERS (continued)
Symbol	Description
α	Ball contact angle
αo	Initial ball contact angle
dp	Ball pitch diameter
uf	Free angle of misalignment
Fr	Radial load
Fa	Axial or thrust load
d	Axial displacement under thrust load
dN	Speed factor
fn	Lubricant factor
L10	Bearing fatigue life (90% reliability)
Lna	Bearing fatigue life after normal adjustments
a1	Material and reliability life correction factor
a2	Operating conditions life correction factor
P	Equivalent load
Pr	Equivalent radial load
Pa	Equivalent axial load
C	Dynamic radial load rating
Ct	C derated for higher temperature
Co	Static radial load rating
Cs	Static axial load rating
ft	Temperature correction factor
fp	Interference factor

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