LEAF CHAINS
AL & BL SERIES
Step 1: From the application table listed below, determine the chain type and service factor.
Application Table
Type of Chain
Shock
Applications
Service Factor Chain Speed ft./Min.
AL Series
Suspension of counterweights
1.0
Moderate
AL & BL Series
Fork lift
1.3
Less than 100
Mining machinery
BL Series
Heavy
1.5
Construction equipment
Step 2: Multiply the required working load by the service factor and safety factor below to obtain the design tensile strength.
Safety Factor
Maximum Number of Reciprocations Less than 100 per day
Type of Chain
Safety Factor
Chain Speed Ft./Min.
Service Factor
AL Series
12
Less than 100
1.0
BL Series chains are a heavier version of leaf chain that has, in most cases, replaced the AL series leaf chains. BL chains are manufactured with a larger pin and larger plate to comparable AL series chains. Tsubaki offers both AL and BL series leaf chains.
BL Series
9
Less than 100
1.3
Less than 1,000 per day
Step 3: From the chain list, select a chain having a tensile strength not less than obtained in step 2.
Minimum Tesile Strength
Working
Service Factor
e X
Safety Factor
<
X
Load
*Working Load including weights of attachments, inertia force and impact force.
When ordering, specify your requirements: • For odd numbers of pitches, inner links (male ends) will be provided. • Clevis connector or press fit rivet outer links are both available in popular sizes.
Connection with Clevis:
1: When an inner link (male end) is used, a clevis pin will be supplied by the clevis manufacturer.
Clevis Connector
Press fit and rivet outer link
2: When an outer link (female end) is used, the press fit outer link provides the most integrity.
Clevis Pin
Clevis Connector
Inner Link
Clevis
Inner Link
Clevis
87
88
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