Chain technique

Chain length adjustment – Shortening

If the installation does not involve adjusting the shaft center of the slack section, chain adjustment should be carried out either at the beginning, or after normal wear has occured. Leaf chains and conveyor chains do not contain offset link. Read directly «chains with an even number of pitches».

Chains with an even number of pitches

Shortening by one pitch

Chain up to and including 25,4 mm pitch.
first remo- ve four pitches of chain from one end, that is two inners and two outers by extracting outer link A (Fig.a). Then fit a double offset link N°221, a spring clip connecting link N° 206 or a riveting outer link N°205 (Fig.b).

chain lengthadjustment drawing1
Chain with a pitch of 31,75 mm or above.
first remove two pitches of chain from one end, that is one inner and one outer link by extracting the outer link A (Fig.c). Then fit a single offset link (Fig.d).
chain lengthadjustment drawing2

Shortening by two pitches

Remove two pitches from one end, that is an inner and outer link by extracting the outer link A.

chain lengthadjustment drawing3

Chains with an odd number of pitches

Shortening by one pitch

Chain of pitch up to and including 25,4mm:
The chain ends with an offset link. Remove the cranked link.

chain lengthadjustment drawing4

Chain with pitch of 31,75mm or above:
The chain ends with a single offset link which also serves as a connecting link. Extract the the outer link A and replace it with a connecting link N° 209 to reassemble the chain.

chain lengthadjustment drawing5

Shortening by two pitches

For all chains.
Extract one inner link removing the outer link at the opposite end of the offset link.
NOTE: Leaf chains and conveyor chains don’t have any crank links, as a consequence they are only concerned by the shortening of 2 pitches.

chain lengthadjustment drawing6
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