ISO 9633:2001
Cycle chains — Characteristics and test methods
This International Standard specifies the dimensions and mechanical properties of cycle chains, as well as test
methods for determining these mechanical properties (i.e. twist, lateral deviation, stiff link and side bow).
NOTE The dimensions of sprockets for cycle chains are specified in ISO 606.
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Cycle chains— Characteristics and test methods
Contents Page
Foreword
Cycle chains— Characteristics and test methods
1 Scope
2 Normative reference
3 Terms and definitions
4 Cycle chains
4.1 Designation
4.2 Dimensions
4.3 Tensile testing
4.4 Push-out force
4.4.1 Select a pin link from a finished chain.
4.4.2 Place the pin link, consisting of an outer plate and two riveted pins, on the test appar...
4.4.3 Apply the load slowly to the pusher until the pin is pushed out of the outer plate.
4.4.4 The minimum load for pushing out a pin from an outer plate of 082C chain shall be as sp...
4.4.5 When taking a sample from a chain, care shall be taken to ensure that there is no extra ...
4.5 Pre-loading
4.6 Length accuracy
4.7 Marking
5 Determination of twist
5.1 Visual detection of twist
5.2 Method of measuring twist
5.2.1 Apparatus
5.2.2 Test sample
5.2.3 Test sample installation
5.2.4 Test procedure
5.2.4.1 Apply a tensile force of
5.2.4.2 Apply a torque of
5.2.4.3 Measure the angular displacement at both sides of the apparatus zero (see Figure
5.2.5 Acceptance criteria
6 Determination of lateral deviation
6.1 Visual detection of lateral deviation
6.2 Method of determining lateral deviation
6.2.1 Apparatus
6.2.2 Test procedure
6.2.2.1 Place a sample chain comprising a minimum of 49links in a horizontal plane with its a...
6.2.2.2 From the fixing point of the chain, slide the measuring straightedge inside the inner ...
6.2.2.3 Increase the tensile force to
6.2.3 Acceptance criteria
7 Detection of a stiff link
7.1 Test procedure
7.1.1 Lay a length of chain on a surface plate with the connecting pins parallel to the surfac...
7.1.2 Turn the chain over and repeat
7.1.3 Any link in either test which does not fall back flat onto the surface shall be declared...
7.2 Acceptance criteria
8 Determination of side bow
8.1 Method of measuring side bow
8.1.1 Lay a degreased chain length of 49 links, each end of which consists of an inner link, o...
8.1.2 Gradually release the force and measure the arc height
8.1.3 Turn the chain over and repeat
8.1.4 The smallest of these two measurements is considered as the side bow value
8.2 Acceptance criteria
Examples of calculation of twist value
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Cycle chains— Characteristics and test methods
Contents Page
Foreword
Cycle chains— Characteristics and test methods
1 Scope
2 Normative reference
3 Terms and definitions
4 Cycle chains
4.1 Designation
4.2 Dimensions
4.3 Tensile testing
4.4 Push-out force
4.4.1 Select a pin link from a finished chain.
4.4.2 Place the pin link, consisting of an outer plate and two riveted pins, on the test appar...
4.4.3 Apply the load slowly to the pusher until the pin is pushed out of the outer plate.
4.4.4 The minimum load for pushing out a pin from an outer plate of 082C chain shall be as sp...
4.4.5 When taking a sample from a chain, care shall be taken to ensure that there is no extra ...
4.5 Pre-loading
4.6 Length accuracy
4.7 Marking
5 Determination of twist
5.1 Visual detection of twist
5.2 Method of measuring twist
5.2.1 Apparatus
5.2.2 Test sample
5.2.3 Test sample installation
5.2.4 Test procedure
5.2.4.1 Apply a tensile force of
5.2.4.2 Apply a torque of
5.2.4.3 Measure the angular displacement at both sides of the apparatus zero (see Figure
5.2.5 Acceptance criteria
6 Determination of lateral deviation
6.1 Visual detection of lateral deviation
6.2 Method of determining lateral deviation
6.2.1 Apparatus
6.2.2 Test procedure
6.2.2.1 Place a sample chain comprising a minimum of 49links in a horizontal plane with its a...
6.2.2.2 From the fixing point of the chain, slide the measuring straightedge inside the inner ...
6.2.2.3 Increase the tensile force to
6.2.3 Acceptance criteria
7 Detection of a stiff link
7.1 Test procedure
7.1.1 Lay a length of chain on a surface plate with the connecting pins parallel to the surfac...
7.1.2 Turn the chain over and repeat
7.1.3 Any link in either test which does not fall back flat onto the surface shall be declared...
7.2 Acceptance criteria
8 Determination of side bow
8.1 Method of measuring side bow
8.1.1 Lay a degreased chain length of 49 links, each end of which consists of an inner link, o...
8.1.2 Gradually release the force and measure the arc height
8.1.3 Turn the chain over and repeat
8.1.4 The smallest of these two measurements is considered as the side bow value
8.2 Acceptance criteria
Examples of calculation of twist value