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The radial clearance of Daewoo Seiko Bearings might be devided into five groups according to ISO.The radial clearance without pre-load is shown on the table.Normally.the products are assembled as basic group clearance.Please note the special requirements in you order sheet if any customer needs bearing clearance rather than the value of basic group.
2.Dustproof,sealing and lubrication
The structure of bearings consist of open and close types,and the close type might be equipped with dust proof on single side or both sides (Z,ZZ);with non-contact sealing ring on single side or both sides(RS,2RS),and with contact sealing ring on single side or both sides(RS,2RS). Before ex works,the product is filled properly with lubricant oil and grease.You may use it immediately after packing.It is suitable for light to middle load,low to middle speed and working temperature-20'C.F or and special case,please note the usage and brand of grease on your order.
The common brand and performance of grease is shown on table.
Bearing accuracy refers to accuracy on dimension and rotation.According to China national standard,the bearing accuracy is divided into five classes;class6,class5,class4,class 2 and class 0,All of them are equivalent to ISO standard.The comparison of different accuracy classes are shown as follows:
Comparison Table of Accuracy Grade
4.Bearing collar and ball material
The most normal material for ball bearing is chrome steel.which features desired hardness,strong rolling fatigue resistance,wearing gresitance and stable dimension,Its chemical composition is:
chemical composition of Bearing steel Gcr15
corresponding designation equivalent to gcrl5
5.Bearing vibration noise specification
According to related standard,the vibration noise(DB)of Daewoo Seiko Bearings are devided into four groups:Z1,Z2,Z3,Z4.Also they can be devided into four groups in according to vibration speed(μm/s):V1,V2,V3,V4,Normally,common bearings are delivered with Z1 group vibration value.if no special requirement from customers,the bearings for export will be delivered with vibration Z2 group specifications.However, please note your special requirement on vibration in your order.
1.Our products specifications:
Ball bearings consist of an inner and outer ring with a cage containing a complement of precision balls.The standard Conrad-type bearing has a deep-groove construction capable of handling radial and axial loads from either direction in versatile designs that permit relatively high-speed operation.
High rotating speeds
High radial and axial load in one or both directions
Daewoo Seiko Bearing Co., Ltd. is a leader manufacturer of bearing with over 10 years experience, located in Guangdong province, It's professional in producing deep groove ball bearing, tapered roller bearing, cylindrical roller bearing, pillow block bearing and other non-standard bearings.
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