The ring and balls of Chengzhou bearings are made of
refining bearing steel Gcr15(AISI 52100),the retainer are punched from
brass strip(H62) or top quality cold-rolled steel strip(SPCC BQ B402)
and reinforced plastics are available if necessary.The shied is made by
phosphatizing steel skeleton and butyronitrile rubber with hot pressed.
The bearing tolerance is classified as Class 2,4,5,6 and 0
accordance with the Chinese national standard GB/T307-94. The table as
below makes a comparison between this classification of tolerance with
Chinese national standard GB307-84 as well as ISO standard.
Inner Ring of P0 grade tolerance
He radial play of bearings is specified as five groups as
follows in accordance with Chinese national standard
Shields,Seals and Lubricant
The bearings are divided into various types such as
bearings,single shield or double shield(Z,ZZ) and single seal or double
seals(RS,2RS). They are filled with proper quantity antirust lubricant
or grease before shipment. All these bearing can be used after unpacking
without cleaning. They are suitable for light to medium load, low to
moderate speed are the working temperature from -20~110℃ equipment. In
case of any particular working condition is involved,customer must mark
lubricant quantity to be filled and lubricant. Special sealing is
available if customer specify ti in order. The characteristics of
sealing are shown on table.
Vibration and Noise
The vibration and noise of bearings are classifited as Z1,Z2
and Z3. It is measured by the instrument of SO910-1. for special
requirement,it is measured by BVT-1 and classified as V1,V2 and V3. The
date are shown as below, customer need mark the requirement of vibration
and noise class on the order.
Every 10 sets bearing are packed into plastic tube or raped
by rustproof paper and paced into carton box. Single package is
available,that is,each set bearing is contained into plastic bag and
then packed in smallinner box. Please specify package in order.