FAQs Technical about Roller Chains :

How is the drive roller chain drive ratio calculated and what is the recommended maximum single loss?

The transmission ratio is a function of the number of teeth of the large sprocket divided by the number of teeth on the smaller sprocket. Recommended maximum speed for one roll reduction gears is 7:1. In practice, the reduction limit of practical single-speed is noted at the minimum size is of the smaller sprocket. The maximum size of the large sprocket is needed for adequate packaging compared to a smaller sprocket. For ratios greater than 7:1, it is preferable to have a double reduction.

Why does my roller chain sprockets stretch too fast?

Proper lubrication is key to achieve maximum wear resistance of each of the roller chain. Since the chain articulates around the sprockets, this causes wearing expansion or "parting" in the string.

What's the temperature limits of the roller chain sprockets?

Carbon steel-based chains can be used in a conventional manner, where the temperatures are between 0 °F (-18 °C) and 350 °F (177 °C). A riveted chain is constructed or side mashed at their edges with pins that extend a small amount through the panel on both sides, and then "riveted" to add a special strength to the power of the pin and plate.

Note: Side mashing riveting is what keeps the pin and plate together, by fitting between the size of the plate hole and the diameter of the nail to keep the two together.

Cottered chain with pins extend a small amount of an additional distance above the disc. On the other hand, with a cross-drilled hole, inserting the erected pin means a Cottered chain can also be done with a press fit between the size of the plate and the pin hole diameters. The plate in this instance would easily be removed after removing the cotter pin, because grinding a riveted end pin is not necessary.

What is the length of the corresponding roller chain and why is it used?

Many applications require two or more channels to be generally parallel to the "flight" linking chains along a conveyor belt or the type of transmission system, which runs with attachments. In these cases it is important that as a set of ordered chains, each one is installed on the machine with the same ratio to each other as if they were tuned to the roller.

You must find a chain that properly fits the needs of your application. There are industry standards that keep chains at certain lengths. Whether your chain was used for an industrial door, large machine or other industrial device, you should be able to find a replacement with the same specifications as the original.

How is the correct chain tension being measured and why is it important?

Proper tension is critical to achieving acceptable chain life, as excessive tension may result in accelerated wear or overload and excessive chain slack lead can cause jumping of the chain on the sprocket, resulting in a total failure of the chain and the machine. For most low and medium-speed movement of the entire middle section, you're looking at approximately 4-6% of the mean distance of the disc in the sag of the chain. For drives with high speeds, shock loads or cancellation, the entire middle movement range should be reduced to 2-3% of center distance. With vertical bodies, they should be set to a smaller percentage. If the drive to adapt the boot or idler pulleys, the amount of movement that includes "take-up" always allows the exclusion of two divisions chains.

How can the wear of roller chain and chain depletion be accurately measured?

Roller chain is relatively accurately determined by measuring the load side of the disk when the disk is turned off, and taking into account the degree of the center pin towards the center of the other pin. The more pitches (pins) contained within the measurement, the more the accuracy increases. If the measured value exceeds the nominal by more than the allowed percentage, you must replace the chain. Maximum wear elongation of 3% for most industrial applications is based on the sprocket design.

Tear and wear of the string is calculated as a percentage using the formula: 200 / N, where N is the number of teeth in the large sprocket. The relationship is often helpful because the normal maximum allowable chain wear elongation of 3% is valid for a maximum period of 67 large sprocket teeth. For drives with fixed center distances, walking or parallel strings in the smooth functioning of the necessary amount of wear should be limited to 1.5%. Whether it is 40 chain or 420 chain, make sure it is properly lubricated to get the best performance and longest life.

What about the "pre-stretching" or "pre-load" roller chain?

How is it produced, and what is important to understand? After installing the initial network load, the pre-load is applied. This pre-load is approximately the maximum recommended load assignment operation. Then align the individual components of the chain, such as pins, bushings and brackets. The advantage is that it helps find the initial part of the "small" chains.

Can I design new devices and machinery using standard roller chains and sprockets?

Yes! Many people design new industrial devices that use roller chains and sprockets, but you must use roller chains and sprockets that you believe will hold up to the power of your machine. A machine you design produces a certain amount of power, and you must choose chains or sprockets that can withstand that sort of power. The chains and sprockets are rated for certain uses, and you must consider how the items have been designed before you choose to use them.

Your designs should include enough space for the sprockets and chains you use, and the design should take into account vertical and horizontal space for the sprockets. You must look at the sprockets laterally to ensure they do not touch one another. Your designs must factor in the size of the sprocket along with the size of its teeth. You can quickly make changes to your plans when using these parts, and you can purchase anything you like for your design.

The care you put into the installation will result in a better machine, and the care you put into the installation will result in longer life for the machine. You cannot treat these steel parts like they are invincible. The parts will break down easily under poor conditions, and you can avoid poor conditions with a bit of wisdom. Your industrial devices will last much longer when using proper sprockets and chains. The sprockets and chains will make the machines more efficient, and the parts can be serviced every year. You are not without options when you are managing large industrial equipment in your facility.