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Advantages of chain

The main advantages of chain transmission are the possibility to convey either small or important powers with high security and in a positive way, with limited obstruction e good output which, if the chain is chosen correctly and suitably lubricated , can reach 98% .

Then there is the high grade of elasticity of the links e therefore the attitude to neutralize most of the discontinuity of the transmission e to moderate " tearing".

The shafts and the supports are only subject to the "draught" in correspondance to the twisting moment , by conveying, practically without supplementary forces due to preloads and stress (which occurs instead with belts) therefore, their dimensions can be reduced to the minimum; with chain transmission the stress operating on the supports doesn’t usually exceed 1,5/4 times the peripheral stress trasmitted by the same chain.

The chain can work without difficulty at relatively high temperatures, up to 180°C, with the only presupposition of a suitable lubrication, completely impossible with belts. Further advantages of chains comparing to belts:

  • No sliding between the chain and the gear teeth
  • Negligible settlement which permits the chain to convey heavy loads
  • Long working life is expected owing to contact between deflection and friction between the support -surfaces, treated and separated by a layer of grease.
  • They can work in hostile surroundings as for example, high temperature, high humidity, greasy, dusty, dirty areas, corrosive zones, etc. especially if alloy metal or other special material are used.
  • Long life in stock: with a certain oil protection , they last for a long time without problems of deterioration.
  • Easily replaced on the plant without touching other components mounted on the same system.

The life of a chain is often object of criticism because the general opinion is that it’s rarely too long: it really depends on numerous factors which quite often are not taken into consideration and to which very scarce attention is paid and therefore, the chains frequently work in impossible conditions causing poor performance.

However if a chain is properly chosen , suitable type, good manufacturing, if the transmission is studied and mounted correctly, the life of the chain is always considerable.