Active Member
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[China]
Address: Cixi Henghe Industrial Zone, Bearing Road NO.20, Zhejiang, China
Contact name:Hu
NINGBO DONGHUANG BEARING CO.,LTD. |
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6301 6302 6303 etc,ZZ or 2RS,Motorcycles used ball bearings,Z2V2 and Z3V3 class for noise and vibrations class,ABEC-3.
Deep groove ball bearings are particularly versatile.They are suitable for high and very high speeds, accommodate radial and axial loads in both directions and require little maintenance. Because deep groove ball bearings are the most widely used bearing type, they are available from VCD in many designs, variants and sizes.
VCD produced 608 deep groove ball bearings(Z3V3 class) are widely used in different types of air conditioners.Now we have established supplying relations with many air conditioners producers in China and
| 608 ZZ | Dimension 8*22*7mm |
| 608 2RS | Dimension 8*22*7mm |
1. Bearing material
Outer ring, inner ring, ball:
High-carbon chromium bearing steel Gcr15(JIS SUJ2,AISI 521000), or stainless steel 9Cr18(AISI 440C)
Cages:
Steel plates and nylon can be used in general situation, while rubber and stainless steel for special usage.
Cover:
Steel plate for shield, and rubber for seals
Rings and balls vacuum dealing with treatment of high carbon chromium bearing steel GCR15 is the standard material to produce the accurate internal and external circle and ball. This material is same with the USA AISL 52100, Germany DIN 100Cr6, Japan JISSUJ2.
The standard cage is made of carbon steel by cold, but in-corrosive environment, no parallel, or under high-speed operation, we can use stainless steel, nylon or phenolic resin cage according to customer’s request.
2. Bearing Seal
Bearing seal form into dust cover and plastic material seal. There are various types of seal. Because of different seal material, bearing to adapt condition will also change.
| Name Code | Characteristics | Using Temperature |
NBR Acrylonitrile-butadiene rubber | Oil resistance,heat resistance,resistance to wear | -40~120 |
FKM Fluorine rubber | Hear resistant,acid and alkali resistant and chemicals, oil resistance preferred | -20~200 |
VMQ Silicone rubber | Heat and cold resistance, good compression deformation is small, but the mechanical strength is not good | -60~230 |
ACM Polypropylene acid ester rubber | Heat resistance, oil resistance better than NBR, but resistance to water and alkali is not strong | -20~150 |
3. The size of bearing clearance directly related to the use of noise, vibration, normal temperature, service life and the assembly of machinery motion effect. Therefore, it is very important that we choose the suitable assembly bearing clearance. We divided from small to big according to radial clearance range into C2, C0, C3, C4 and C5. Specific reference see the chart:
| Bore | C2 | C0 | C3 | C4 | C5 | ||||||||
| Over | Including | ||||||||||||
| mm | Inch | mm | Inch | Min | Max | Min | Max | Min | Max | Min | Max | Min. | Max |
| 2.5 | 0.0984 | 10 | 0.3937 | 0 | 7 | 2 | 13 | 8 | 23 | 14 | 29 | 20 | 37 |
| 10 | 0.3937 | 18 | 0.7087 | 0 | 9 | 3 | 18 | 11 | 25 | 18 | 33 | 25 | 45 |
| 18 | 0.7887 | 24 | 0.9449 | 0 | 10 | 5 | 20 | 13 | 28 | 20 | 36 | 28 | 48 |
| 24 | 0.9449 | 30 | 1.1811 | 1 | 11 | 5 | 20 | 13 | 28 | 23 | 41 | 30 | 53 |
| 30 | 1.1811 | 40 | 1.5748 | 1 | 11 | 6 | 20 | 15 | 33 | 28 | 46 | 40 | 64 |
| 40 | 1.5748 | 50 | 1.9685 | 1 | 11 | 6 | 23 | 18 | 36 | 30 | 51 | 45 | 73 |
| 50 | 1.9685 | 65 | 2.5591 | 1 | 15 | 8 | 28 | 23 | 43 | 38 | 61 | 55 | 90 |
4. Also can consult the table below choose bearing clearance
| The usage situation | Use examples | Choose clearance |
| Strict control noise, vibration installation precision, high position | Instrument and equipmentRoll neck calender Low noise and small motor | C2,C0 |
| General load, speed, working temperature is not high | Transmission machinery, reducer and other general machinery | C0 |
| High temperature, high speed, high requirements for service life | Automobile generator and engine | C3 |
| Using high temperature environment, should not be the occasion of heat | Drying machine, paper making machinery, and so on | C3,C4 |
| High temperature, high speed, and large impact load | Vibrating screen, speed gear
| C4 |
| Inner and outer ring take the surplus interference, large volume, high temperature, heat dissipation | Vibration type pressure road, machine car rear wheel | C5 |
5. Bearing can choose diversity of greases. According to the different work environment and bearing operation conditions, we used the following list of grease, in order to convenience for clients to choose. Besides these greases of the listed below, can also add other greases according to the requirements of our customers.
| Brand | Products | Base oil | Range of using temperature | Character |
KYODO YUSHI | Multemp SRL | Polyol ester+Diester | -50~+150 | Can effectively restrain the noise, prolong service life |
| Multemp PS | Diester+refined mineral oil | -50~+130 | Suitable for low temperature, and restrain the noise effectively | |
| Multemp SM-B | Synthetic hydrocarbon | -50~+200 | Long life in the high temperature operation, appropriate used in low temperature, low torque in high speed running, low noise | |
| Multemp ET-K | Synthetic ether+Polyol ester | -40≥~+200 | High temperature condition continued work, having longer life | |
| RAREMAX SUPERN | Synthetic oil | -30~+200 | High temperature longevity grease | |
EXXON MOBILE | Polyrex EM | Mineral grease | -40~+180 | Long life and resist to high temperature |
| Beacon325 | Synthetic grease | -54~+150 | Common use grease | |
| Andok C | Petroleum oil | -27~+120 | Move smoothly and when minimum sliding, has long service life | |
EXXON MOBILE | Mobile 28 | Synthetic hydrocarbon | -54~+177 | Wide temperature range and low torque |
| (MIL-G-81322) | ||||
| Mobil HP | Lithium compounds | -30~+110 | Moderate speed and inhibit the corrosion effectvely | |
| CHEVRON | SRI-2 | Mineral grease | -30~+180 | Wode temperature range, waterproof effect is good |
| SHELL | Alvania 2 | Mineral grease | -35~+120 | Long life and resist to high temperature |
| RLQ#2 | Mineral grease | -50~+150 | Low noise, fast speed, and resistant high temperature | |
| DUPONT | Krytox 240AC | Fluoride grease | -35~+290 | Stability effect is good in high temperature, and lubrication effect is strong |
| KLUBER | ASONIC | Synthetic hydrocarbon | -50~+140 | Low noise, long life and low torque |
