BS ISO 4347:2015 pdf free.Leaf chains, clevises and sheaves一Dimensions, measuring forces, tensile strengths and dynamic strengths.
BS ISO 4347 specifies the characteristics of chains used for general lifting purposes, together with the rim profiles of sheaves and the chain attachment ends of devises. It gives dimensions, limits for interchangeability, length measurement, preloading, minimum tensile strengths and minimum dynamic strengths.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 606, Short-pitch transmission precision roller and bush chains, attachments and associated chain sprockets
ISO 156541), Fatigue test methods for transmission precision roller chains and leaf chains ASM E2) B29.8, Leaf chains, devises and sheaves
3 Chains
3.1 Nomenclature
The nomenclature of chains is shown in Figure 1 (which does not necessarily define the actual form of the chain plates) and as given in Table 1 and Table 2.
3.2 Chain designation
Leaf chain shall be designated by the prefix “LH”[“BL”] for chains derived from the ISO 606 A [ASME B29.8] series, or by the prefix“LL”for chains derived from ISO 606 B series, followed by a number of which the first two digits indicate the pitch expressed in sixteenths of an inch and the last two digits indicate the lacing (number of plates in the outer plate pitch and inner plate pitch).
To obtain the ASME“BL” reference, the same principle is used, except that the pitch is expressed in eighths of an inch using only one or two digits, dependent on pitch.
3.3 Dimensions
The dimensions given in Table 1 and Table 2 provide minimum and maximum limits, ensuring interchangeability and connection to standard design clevises.
Manufacturers are responsible for the actual dimensional features of their products.
Chains from different manufacturers shall never be placed together within the same application.BS ISO 4347 pdf download.
Tags: clevises and sheaves, Leaf chains
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