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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Description
Deep groove ball bearing is a kind of the most common rolling bearing. The basic type of deep groove ball bearing is composed of an outer ring, a ring, a group of steel ball and a group of retainers. Deep groove ball bearing has a single row and double row two types, and also has sealed bearing and open bearing, open refers to the bearing without sealing structure,sealing type deep groove ball into the dust seal and oil seal. Dust seal cover material for steel plate stamping, plays only a simple prevent dust from entering the bearing raceway. Oil proof type contact type oil seal, can effectively prevent bearing grease inside the spillover.
Applications:
Deep groove ball bearing can be used for transmission, instruments
and meters, electric machinery, household electrical appliances,
internal combustion engines, transportation vehicles, agricultural
machinery, construction machinery, engineering machinery, roller
skate,yo-yo etc.
| 608 ZZ | Dimension 8*22*7mm |
| 608 2RS | Dimension 8*22*7mm |
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 |
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 |
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 |
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 |
