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Bush Chains

A bush chain has no rollers but has bushes that are secured against rotation. They are used for conveyor and load chains where high traction forces must be transferred at low speeds. The bush chain and roller chain are comparable in performance and are used in the same applications. A bush chain has a lower wear rate than a roller chain and is used in slower operating systems.

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Bush Chains

A bush chain has no rollers but has bushes that are secured against rotation. They are used for conveyor and load chains where high traction forces must be transferred at low speeds. The bush chain and roller chain are comparable in performance and are used in the same applications. A bush chain has a lower wear rate than a roller chain and is used in slower operating systems.

In general, Bush chains have several advantages over roller chains. They are inexpensive and can be used in general applications. Bush chains are also available with a variety of attachments and sizes. For high-precision applications, special made-to-order sprockets are recommended. Some models also have a kelly roller over the bush. These are commonly used in load transport and control applications. These chains have bent plates and are installed in heavy-duty gear systems.

Bush Chains

Specifications of Bush Chains

Bush Chains

Chain No. Pitch Bush diameter Width between inner plates Pin diameter Pin length Plate depth Plate thickness Ultimate tensile strength Average tensile strength Weight per meter
P d1
max
b1
min
d2
max
L
max
Lc max h2
max
t/T
max
Q
min
Q0
min
q
mm mm mm mm mm mm mm mm kN/lbf kN kg/m
P15F-B 15.00 9.00 14.0 6.0 25.3 30.0 14.0 2.03 12.5/2852.5 13.75 1.150
P19.05 19.05 12.7 12.5 7.5 31.6 33.6 20.0 4.15/3.25 50.0/11248 55.00 2.560
P20-B 20.00 12.0 16.0 8.0 33.0 36.0 18.0 3.00 25.0/5624 27.50 2.140
P20F3-B 20.00 12.0 16.0 8.0 33.0 36.0 19.0 3.00 25.0/5624 27.50 2.030
*PZ20-B 20.00 12.0 16.0 8.0 33.0 34.7 18.0 3.00 25.0/5624 27.50 2.253
P25-B 25.00 15.0 18.0 10.0 35.0 39.0 24.0 3.00 31.5/7086 34.70 3.170
P25F1-B 25.00 15.0 18.0 10.0 35.0 39.0 24.0 3.00 31.5/7086 34.70 2.670
P30F2-B 30.00 17.0 20.0 11.0 41.0 45.4 28.0 4.00 40.0/8998 44.00 4.250
P30F6-B 30.00 17.0 20.0 11.0 42.4 46.0 28.0 4.00 40.0/8998 44.00 3.750
P35F2-B 35.00 18.0 22.0 12.0 44.5 48.0 30.0 4.00 50.0/11248 55.00 4.330
P35F5-B 35.00 18.0 22.0 12.0 44.5 48.0 30.0 4.00 50.0/11248 55.00 3.770
P36-B 36.00 18.0 22.0 12.5 44.5 49.0 30.0 4.00 60.0/13497 66.00 4.200
P40-B 40.00 20.0 25.0 14.0 52.4 57.0 35.0 5.00 63.0/14172 69.30 5.430
P45-B 45.00 22.0 30.0 16.0 62.0 66.5 40.0 6.00 80.0/17996 88.00 7.540
P50-B 50.00 26.0 35.0 18.0 68.0 73.5 44.0 6.00 100.0/22495 110.00 8.900
*P50.8F7 50.80 18.5 25.0 14.5 53.5 57.5 40.0 5.00 120.0/26994 132.00 6.300
P55-B 55.00 30.0 45.0 20.0 88.0 93.5 49.0 8.00 125.0/28119 137.50 13.920
P55F1-B 55.00 30.0 45.0 20.0 88.0 110.0 49.0 8.00 125.0/28119 137.50 13.920
P60-B 60.00 32.0 50.0 22.0 94.1 99.5 55.0 8.00 160.0/35993 176.00 15.200
P70-B 70.00 30.0 65.0 30.0 117.0 130.0 67.0 10.00 250.0/57050 275.00 26.270
P80-B 80.00 44.0 70.0 32.0 131.0 150.0 75.0 12.00 315.0/71883 346.00 31.800

 

Bush Chain Features

Bush chains differ from roller chains in a number of ways. They feature alternating inner and outer link plates. In the bush version, a bush is pressed into the inner plate, while a pin fits into the outer plate and passes through the bore in the bush. This type of chain is largely used in the mining industry and construction sites. Despite these differences, bush chains are similar to roller chains in operation and construction. But one main difference between the two is the presence of a roller over the bush.

A bush chain has two outer plates. One is low-cost and can be used in general applications, while the other is designed for high-precision applications. In addition, bush chains are available in both metric and inch pitches. The metric pitch is preferred in construction because of the precision of the sprockets. While the two outer plates are similar, the first one is larger than the second one. For accurate measurement, special made-to-order sprockets are required.

Another feature of a bush chain is its grinding. This grind-out effect reduces stretching and prevents the generation of coarse abraded grit during chain driving. The grinding process also improves the chain's wear characteristics. A bush chain that grinds the inner peripheral face prevents adhesive wear caused by abraded grit. It also prevents the growth of adhesion-causing particles. This feature is one of the best benefits of bush chains.

Choosing Sprockets for Bush Chains

There are many different kinds of sprockets for sale for Bush chains. Choosing the right one will make your chain run smoothly. Here are some considerations to consider when choosing one. First, you'll need to determine the number of teeth that are needed for your chain. The sprocket should have an odd number of teeth to prevent the teeth from wearing in over time. If you find that one of your sprockets is too worn, you might want to replace it.

Another important consideration is the type of material that the sprocket is made of. While many transmission drive chains can be manufactured with standard sprockets, there are many different options for bush chains that are made with machined teeth. This option offers a higher degree of precision. It also comes with a variety of attachments. Many people also prefer plastic sprockets for their chain applications. They are very smooth and noise-free.

It is also important to monitor chain tension. The tension on the chain decreases proportionally from sprocket to link. On adjustable-center drives, the tension is two-thirds the length of the chain. In fixed-center drives, the chain should be replaced when it has reached 1.5% elongation. To check if the chain is worn, you can pull the chain away from the larger sprocket. If the chain moves significantly, it indicates that the chain is worn. If the chain is not replaced, the sprocket may suffer damage.

Another important consideration is the amount of weight the chain needs to carry. The weight of the chain should not be greater than the rated capacity of the bush chain. The roller should be resistant to wear, shock, and fatigue. Guide Rails and bush chains are both high-precision options. A double-pitch chain is also available. If you're going to use the bush chain on a small scale, you can opt for a low-pitch model.

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