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Chain determination

Normally the customer knows his personal requirements and asks for an offer indicating:

P = Pitch
Hi = Inside width
Dr = Roller diameter
hp = Sidebar height
S = Thickness
Q = Quantity

Other usefull indications can be the pin and bush diameter and the minimum breaking load requested.

However, Rosa Catene Spa and their technicians are ready to help you choose the most suitable chain for your specific application.

To be enabled to do so, the information given must be very precise:

Therefore, we are asking you to please fill out the following outline:

  • Type of Input Power Source
  • Type of conveyor
  • Type of drive (regular- moderate shock - strong shock)
  • Distance between center,wheels and number of teeth
  • Horsepower (hp)
  • Number of chains in parallel
  • Conditions of use, handling, weight/meter conveyed and total length of the conveyor.
  • Requested speed
  • Type of attachment, distance between attachments
  • Working surroundings (presence of water, chemicals, high or low temperature, abrasives, etc.)
  • Type of lubrication requested or supplied
  • Chain previously utilized

The UNI 7484 Standards regulate some of the characteristics fundamental for the fabbrication of roller chains " European series" (ISO), such as:

DIMENSIONS: the dimensions of the chain must be in conformity with the values indicated in the catalogues. The max. and min. dimensions indicated guarantee the interchangeability of the chains produced by different manufacturers.

BREAKING LOADS: the test sample must have at least 5 pitches free from the locking system of the testing device. The two ends of the sample must be connected to the vices of the testing device by a pin passing through the plate bores or through the bush , or connected to the vices by a common roller to an inner and outer link. The choice of the method utilized depends on the manufacturer.
The anchoring device must permit the movement of the sample on all planes.
If the link right near the connection link breaks , the test cannot be considered valid.

PROOF LOADS: We suggest to try all the chains at a load equal to a third of the minimum breaking load of the chain.

LENGTH PRECISION: the finished chains must be measured after having been subject to a proof load.
The length of the sample chain to be measured must be the minor between 49 times the chain pitch or 1,524mm and must finish on both ends with an inner link. The chain must be supported on the entire length and then a fair measure load must be applied to it.
The length must result equal to the nominal length with limits of +0,15-0 .
The length of the chains that must work in parallel must remain within these limits of tolerance and the chains must be coupled according to the agreements made with the manufacturer.