BS ISO 606:2015 Short-pitch transmission precision roller and bush chains, attachments and associated chain sprockets

BS ISO 606:2015 pdf free.Short-pitch transmission precision roller and bush chains, attachments and associated chain sprockets.
WARNING — The test requirements are not to be taken as working loads. These loads could be selected, indirectly, using Iso 10823. The test results shall be invalid if the chain has previously been in service or stressed in any way (other than by preloading in accordance with 3.4.3).
The tests given in 3.4.2 to 3.4.5 shall only be performed on unused, undamaged chains to determine whether the subject chain complies with the minimum requirements specified in Tables 1 and 2.
3.4.2.1 The minimum tensile strength is that value which shall be exceeded when a tensile force is applied to a sample tested to destruction in accordance with 3.4.2.2
NOTE This minimum tensile strength is not a working load, but is intended primarily as a comparative figure between chains of various constructions.
3.4.2.2 Apply a tensile force slowly to the ends of a chain length containing at least fIve free pitches by means of fixtures permitting free movement on both sides of the chain centreline, in the normal plane of articulation. Annex E (informative) describes methods to consider using in order to avoid an excessive increase in the rate of stress being applied to the chain during the tensile test.
Failure shall be considered to have occurred at the first point where increasing extension is no longer accompanied by increasing force, i.e. the summit of the force/extension diagram. The force at this point shall exceed the minimum tensile strength stated in Tables 1 and 2..
Tests in which failures occur adjacent to the shackles shall be disregarded.
3.4.2.3 The tensile test shall be considered as a destructive test. Even though a chain might not visibly fail when subjected to a force equivalent to the minimum tensile strength, it will have been stressed beyond the yield point and will be unfit for service.
3.4.2.4 These requirements do not apply to cranked links, connecting links or chains with attachments, as their tensile strength could be reduced.
3.4.3 Preloading
Chains manufactured in conformance with this International Standard shall be preloaded by applying a minimum tensile force equivalent to 30 % of the minimum tensile strength given in Tables 1 and 2.
3.4.4 Length validation
Measurement of chains shall take place after preloading but before lubrication. The standard length for measurement shall be a minimum of
a) 610 mm for ISO chain numbers 25 to 12B and 081 to 41 inclusive, or b) 1 220 mm for ISO chain numbers 80 to 72B inclusive.
The chain shall be supported throughout its entire length and the measuring force specified in Tables 1 and 2. shall be applied.
The length accuracy of chains which have to work in parallel can be matched within closer tolerances.
3.4.5 Dynamic testing
Chains in contotmance with this International Standard shall survive a conformance test, as specified in ISO 15654, using the dynamic strength values given in Tables 1 or Z for the particular chain. These requirements do not apply to cranked links, connecting links or chains with attachments, as their dynamic strength could be reduced. The methods used for calculating the minimum dynamic strength are given in Annex C. The method for determining the maximum test force for the conformance test is given in Annex D. The informative Annex F describes two methods used to approximate the minimum dynamic test values for multiplex chains.
3.5 Marking
The chain shall be marked with the manufacturer’s name or trademark. The chain number quoted in
Tables 1 or 2 should be marked on the chain, with the exception of chains in the ANSI extra heavy series
(suffix HE) where the manufacturer can mark the chains with their own designation.
3.6 Cranked links
Cranked links should not be used with the heavy and extra heavy series chains or on chains which are intended for highly stressed applications. Where a cranked link is used a reduction in performance will occur.
4 Attachments
4.1 Nomenclature
The nomenclature for chain attachments is given in Figures 4, 5, 6 and z, and in Tables 1, 3, 4 and 5.
4.2 General
Except when otherwise stated, the characteristics, dimensions and tests for the chain with attachments
shall be in accordance with Clause 3.
4.3 Designation
Three types of attachment are given, with the common dimensional basis as given in Tables 3.4 and . Their designation and distinguishing features are as follows:
a) K attachments, as shown in Figure 4:
1) KI, with one attachment hole centrally located in each platform;
2) K2, with two attachment holes longitudinally located;
b) M attachments, as shown in Figure 5:
1) Ml, with one attachment hole centrally located in the plate;
2) M2, with two attachment holes longitudinally located;
c) Extended pin: with the bearing pin extended on one side of the chain as shown in Figures 6 and 7. Alternative pin extensions are shown, one based on the use of the duplex pin (see Figure 6) and the other based on those extended pins commonly used in “ANSI’ series chains (see Figure 7).
4.4 Dimensions
Attachments shall conform to the dimensions given in Tables 3.4 and .
4.5 Manufacture
The actual form of the attachment plates is left to the discretion of the manufacturer. K attachment plates are normally bent from M attachment plates.
The length of the attachment plate is also left to the discretion of the manufacturer, but should be sufficient to accommodate the two attachment holes longitudinally in the case of Type K2 and not interfere with the working of the adjoining links. A common length could be adopted for both Type Ki and K2.
4.6 Marking
It is not a requirement that K and M attachment plates be marked.
The marking of the extended pin chain shall be the same as that which would be shown on a chain with no attachments (see j).
5 Chain sprockets
5.1 General
This clause gives specifications for chain sprockets for use with short-pitch transmission precision roller and bush chains conforming to Clause 3 and specifies general criteria for ensuring correct meshing, operation and transmission of load wheti used under normal operating conditions.
5.2 Nomenclature
The nomenclature for chain sprockets is shown in Figures 8. 9 and 1.
The measurement over pins of sprockets with an even number of teeth shall be carried out over pins inserted in opposite tooth gaps.
The measurement over pins of sprockets with an odd number of teeth shall be carried out over pins in the tooth gaps most nearly opposite
The limits of tolerance for measurement over pins are identical to those for the corresponding root diameters.
5.4 Sprocket tooth gap forms
5.4.1 Nomenclature See Figure 9.
5.4.2 Dimensions
5.4.2.1 General
The limits of the tooth gap form are determined by the minimum and maximum tooth gap forms. The actual tooth gap form, which is provided by cutting or an equivalent method, shall have tooth flanks of a form lying between the minimum and maximum flank radii and blending smoothly with the roller seating curve subtending the respective angles.BS ISO 606 pdf free download.BS ISO 606:2015 Short-pitch transmission precision roller and bush chains, attachments and associated chain sprockets