Rings(cups & cones) & Rolling elements
XTSKY bearing rings(cups & cones), balls & rollers are made of GCr15 high carbon chromium bearing steel
This steel No. is equal to the AISI 52100(U.S.A.), DIN 100Cr6(Germany), JIS SUJ2(Japan) etc.

Chemical composition of GCr15 steel:
Steel No.£ºGCr 15
Chemical composition %
C--0.95-1.05
Si--0.15-0.35
Mn--0.25-0.45
P--¡Ü0.027
S--¡Ü0.02
Cr--1.40-1.65
Cu--¡Ü0.25
Ni--¡Ü0.30

Contrast of steel no. in different countries
Country      Standard        Steel No.
China         GB             GCr15
ISO                          683/XVLL1
U.S.A.        AISI           52100
Japan         JIS            SUJ2
Germany       DIN            100Cr6
France        NF             100C6
Sweden                       SKF3

Hardness
Hardness of bearing rings(cups & cones) & rolling elements is HRC60¡«HRC65.

Retainers
XTSKY standard bearing retainers are made from cold rolled carbon steel.
However, in cases of heavy duty, corrosive environment,misalignment and high speed operation,
brass, stainless steel, nylon or phenolic resins will be used upon request.

Seals & Shields
XTSKY shields also employ carbon steel as standard.
Buna Nitrile is the standard and mostly common used material for XTSKY seals.
Also, in order to meet the requirements of high temperature operation and compatibility with grease,
a variety of other sealing materials are also applied to the seals.

Lubrication
Standard grease and oil are applied to XTSKY bearing products
XTSKY can also use special pointed brand grease or oil upon request