Description
Polyurethane round belt is a kind of transmission belt. The cross-sectional shape of round urethane drive belt is circular. It is different from flat belt drive, V belt drive and synchronous belt drive. Therefore it is also namely PU round urethane belt. The PU round belt and the pulley together form a round belt drive. Round belt transmission is a kind of friction transmission.
Where to buy polyurethane round belt? As round urethane drive belt supplier, we sell strong 2~20mm diameter PU O-belt. And green round urethane belt is easy for welding and jointing. It’s connectable drive and conveyor belt.
How does PU round belt work? Firstly, the transmission belt is tightly sleeved on the two pulleys. So It create pressure between the contact surface of round urethane belt and the pulley. When the driving pulley rotates, the friction force causes the belt to move. At the same time, PU round belt drives the driven pulley to move back. So as to transmit movement and power.
Technical Specification of Polyurethane Round Belt:
Belt surface: rough (of course, it can also customize smooth surface O-belt);
Color: green color (rough surface) (if smooth surface, it’s orange color);
Drive belt material: PU or polyurethane or urethane;
Belt specification: diameter~2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 18, 20 mm;
Jointing method: hot melting by electric soldering iron welder or fire;
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Green PU round belt
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Model
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Dia
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Mini radius of gyration
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stretch rate
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Max tensile
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Length
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mm
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in
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mm
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KG
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Ibs
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m
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Φ2
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2
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0.75
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20
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1.5~3%
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0.3
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0.7
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400
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Φ3
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3
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1.00
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25
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1.5~3%
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0.7
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1.6
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400
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Φ4
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4
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1.25
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35
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1.5~3%
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1.2
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2.7
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200
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Φ5
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5
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1.50
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40
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1.5~3%
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2.0
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4.4
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200
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Φ6
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6
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1.75
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50
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1.5~3%
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3.2
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7.1
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200
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Φ7
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7
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2.00
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55
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1.5~3%
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4.1
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9.1
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100
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Φ8
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8
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2.25
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65
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1.5~3%
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5.0
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11.1
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100
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Φ9
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9
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2.50
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75
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1.5~3%
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6.8
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15.1
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50
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Φ10
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10
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3.00
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75
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1.5~3%
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7.7
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17.1
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50
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Φ12
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12
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4.00
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100
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1.5~3%
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12.2
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27.1
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30
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Φ15
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15
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4.75
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120
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1.5~3%
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17.7
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39.3
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30
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Φ18
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18
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5.75
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145
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1.5~3%
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25.4
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56.4
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30
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Φ20
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20
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6.25
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160
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1.5~3%
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31.3
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69.6
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30
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Features of PU Round Belt:
1. Good abrasion resistance
Among the known rubbers, polyurethane has the best abrasion resistance. Its wear resistance is 5-10 times that of natural rubber. Thus, the polyurethane round belt is impact resistant, extremely high tensile and tensile strength. Moreover, it has good thermal stability, high elongation performance. So round urethane drive belt has long lifetime.
2. Oil resistant, waterproof and chemical resistance.
Polyurethane is a polymer material. Thus, it is hardly corroded in fuel and machine oil. Polyurethane round belt has excellent water resistance at room temperature.
At the same time, the O-belt can also be used for a long time in harsh external environments. It not only has good damping performance, but also improves the strength of mechanical operation. And the rebound rate of the material is high. The polyurethane round belt has good dimensional stability. Besides, PU round belt is also resistant to many solvents.
3. Other features
Because round urethane belt is elastic, it can alleviate the impact of the load. The movement is smooth and noise-free. The installation accuracy is not as strict as the meshing drive. Moreover, it can increase the belt length to adapt to working conditions with a larger center distance.
In addition, easy maintenance and low cost. Easy to weld, easy to install. PU round urethane belt is not easy to break at low temperature, and the temperature range is -35℃ to 80℃. Moreover, round urethane drive belt can also suitable for long-distance transmission. However, polyurethane round belt is not suitable for high temperature, flammable and other occasions.
Difference with other drive belts
According to different transmission principles, drive belts can be divided into friction and meshing type. Friction-type belt can be several kinds, such as flat belt, V-belt, ribbed belt and polyurethane round belt according to the cross-sectional shape of the belt.
The flat belt drive structure is simple. It is mostly used in occasions where the transmission center distance is relatively large.
The friction of the V-belt drive is greater. So it can transmit higher power. And the V-belt has no joints, and the transmission is relatively stable. Therefore, the V-belt drive has the most wide application.
Ribbed belt is also namely multi-wedge belt. It has the advantages of flat belt and V belt. Therefore, it is suitable for occasions requiring compact structure and large transmission power.
The polyurethane round belt drive generates friction by pressing the belt and the wheel groove. It is applicable for low-speed and small-power transmission, such as the transmission of light duty roller conveyors, sewing machines, and tape reels.
The meshing belt drive refers to a timing belt. It is suitable for medium and small power transmission with accurate transmission ratio.
How to install the PU round belt rightly?
Whether you want to replace the polyurethane round belt or reinstall it on a new transmission device, we recommend following the steps below:
1. Turn off the power first and remove the protective cover. Loosen the mounting bolts of the motor. Special reminder: Do not pry off the PU round belt.
2. Remove the old belt. Check for abnormal wear. Then choose a suitable belt replacement.
3. Clean the round urethane belt and pulley. Wipe with a rag moistened with some non-volatile liquid. Do not soak in detergent or scrub the belt. It must keep the polyurethane round belt dry before installation and use.
4. Check the remaining parts of the transmission device.
5. Tighten the center distance of the transmission device until the belt tension is proper.
8. Tighten the assembly bolts of the motor. Correct the torque. Be sure to make sure that all transmission parts are tightened.
Pay special attention to the performance of the PU polyurethane round belt when starting the device. If any abnormality is found, handle it in time.
How to weld polyurethane belts?
1. The easiest way: put polyurethane round belt on a lighter or alcohol lamp. Joining immediately after heating and melting;
2. Put round urethane belt on the flat soldering iron. Jointing immediately after the two ends are melted;
3. If the quantity and requirements are high, purchase a pu round belt welding machine;
The easiest method of jointing the ends of PU round belt:
Step1: To be heated with an alcohol lamp until it is hot enough to melt the end of the belting.
Step2: Join the ends together until they cool.
Step3: Trim off the extra material around the joint until the joint is the same diameter as polyurethane round belt.
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