Material of UGT Bearings

The material of the rolling elements and bearing components require enough hardness and large fatigue strength against repeated force that is due to fatigue fracture of rolling surface which control life of bearings.

To purpose prevent deformation of components due to high load we control limit of elasticity and strength of bearings.

UGT bearings material is GCR15 Steel (JIS G4805) High carbon chromium bearing steel with following chemical composition;

 

No.

 

Standard

 

Symbol

Chemical Composition (%)

C

Si

Mn

P

S

Cr

 

1

GB

GCR15

 

0.98-1.10

 

0.15-0.35

 

<0.50

 

<0.025

 

<0.025

 

1.30-1.60

DIN

100Cr6

ASTM

E5200

JIS

SUJ2

 

2

GB

9Cr18

 

0.98-1.10

 

<1.00

 

<1.00

 

<0.025

 

<0.025

 

16.00-18.00

DIN

X105CrMO17

ASTM

440C

JIS

SUC440C

UGT bearings continuously check for quality of material and high quality through hardened bearing steel for acceptance according to JIS-Standards.

Following are the tests that we do to keep up and investigate about quality parameters;

Chemical Analysis , Magnetic Exploration , Ultrasonic Exploration , Corrosion Tests under St-Acid , Microscope inspection , Crusher tests And Visual testing .

Cage Material:

UGT cages can be divided into two groups, namely, metal (ferrous and ferrous) cages and synthetic resin cages. Metal cages can be further divided into press cages and machined cages.

UGT have many kind of cages for different application, size , revolving speeds , temperature conditions , lubricating methods, machining workability of various bearings .

Material of UGT cage and rivet is JIS G3141 (Cold rolled carbon steel sheet and strip that mainly use for ferrous cage.