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ASME B29.400
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ASME B29.400 2001 Edition, 2001 Combination, "H" Type Mill Chains, and Sprockets
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Description / Abstract:
This Standard is a consolidation of two ASME standards, ASME
B29.11M-1994 (Combination Chains,
Attachments, and Sprocket Teeth) and ASME B29.14M-1996 ("H" Type Mill
Chains, Attachments, and
Sprocket Teeth). These two standards were combined into one because of
the similarity of
construction and the unusual applications for the two types of chains.
B29.11M - Combination Chains, Attachments, and Sprocket Teeth
In 1886 a patent was granted for a chain comprised of cast metal block links, fitted with bronze bushings, and connected with wrought steel sidebars and removable pins. This chain was the forerunner of the present combination chain (B29.11M), later placed on the market around 1900. Many sizes and types of combination chains were developed and marketed in the next several years.
During World War I, the War Industries Board insisted that chain manufacture be confined to the necessary sizes. This caused elimination of several types and sizes, and planted the seed for future standardization. Following World War I, the Malleable Chain Manufacturers Institute was formed, and this group did considerable work on standardization of chain and sprocket dimensions for combination chains of the more popular sizes. There were still dimensional variations that would not permit universal intercoupling of chains of different manufacture, necessitating repairs made with chains of the original manufacturer.
The ASCMA (now the American Chain Association), recognizing the need for a complete standard providing intercoupling and direct replacement of chains of different manufacture, established this Standard utilizing the minimum number of chains to meet requirements of industry for the chains widely used in conveyor and elevator applications.
To facilitate the use of this Standard in the international market, the metric equivalents of all dimensions are given.
This Standard was presented to the USASI (now the American National Standards Institute) B29 Committee in December 1963 and, upon approval by the USASI on May 24, 1968, was adopted and published.
The 1974 revision included minor changes in metric units and change from ultimate strengths to proof test loads with the corresponding explanatory and caution notes.
The American National Standards Institute approved the previous revision in 1984.
The 1994 revision defines the proof test loads as "minimum" in Table 1 and adds minimum attachment hole diameters to Tables 4 through 9. The information in Fig. 4 was modified to strengthen the recommendation for undersized root diameters and pocket radii.
B29.14M - "H" Type Mill Chains, Attachments, and Sprocket Teeth
The "H" type mill chains (B29.14M) are a derivative of the malleable detachable chains and were developed to meet the demands of heavier duty service.
These chains were developed principally for the lumber and pulp and paper industries for drives, transfer, and drag conveyors. They are also well adapted to elevator service of moderate speeds and loads.
Interchangeability between chains of various manufacturers is important with the widespread usage of these chains.
In September 1967, a subcommittee of American National Standards Committee B29 was appointed with members from the malleable chain industry to develop a standard for the "H" type mill chains, attachments, and sprocket teeth.
The standard developed by this committee restricts only those dimensions that affect interchangeability.
To promote the use of this Standard in the International Market, the metric equivalent of all dimensions is given.
The document was approved as an American National Standard on December 17, 1971.
The revision was approved by the American National Standards Institute on July 16, 1996.
Added to the 1996 revision is the minimum bolt hole diameter required for bolt diameter given for the particular attachments.
The 2001 revisions of both ASME B29.11M and ASME B29.14M have been incorporated to form the ASME B29.400-2001 standard. This Standard was approved as an American National Standard on November 27, 2001.
B29.11M - Combination Chains, Attachments, and Sprocket Teeth
In 1886 a patent was granted for a chain comprised of cast metal block links, fitted with bronze bushings, and connected with wrought steel sidebars and removable pins. This chain was the forerunner of the present combination chain (B29.11M), later placed on the market around 1900. Many sizes and types of combination chains were developed and marketed in the next several years.
During World War I, the War Industries Board insisted that chain manufacture be confined to the necessary sizes. This caused elimination of several types and sizes, and planted the seed for future standardization. Following World War I, the Malleable Chain Manufacturers Institute was formed, and this group did considerable work on standardization of chain and sprocket dimensions for combination chains of the more popular sizes. There were still dimensional variations that would not permit universal intercoupling of chains of different manufacture, necessitating repairs made with chains of the original manufacturer.
The ASCMA (now the American Chain Association), recognizing the need for a complete standard providing intercoupling and direct replacement of chains of different manufacture, established this Standard utilizing the minimum number of chains to meet requirements of industry for the chains widely used in conveyor and elevator applications.
To facilitate the use of this Standard in the international market, the metric equivalents of all dimensions are given.
This Standard was presented to the USASI (now the American National Standards Institute) B29 Committee in December 1963 and, upon approval by the USASI on May 24, 1968, was adopted and published.
The 1974 revision included minor changes in metric units and change from ultimate strengths to proof test loads with the corresponding explanatory and caution notes.
The American National Standards Institute approved the previous revision in 1984.
The 1994 revision defines the proof test loads as "minimum" in Table 1 and adds minimum attachment hole diameters to Tables 4 through 9. The information in Fig. 4 was modified to strengthen the recommendation for undersized root diameters and pocket radii.
B29.14M - "H" Type Mill Chains, Attachments, and Sprocket Teeth
The "H" type mill chains (B29.14M) are a derivative of the malleable detachable chains and were developed to meet the demands of heavier duty service.
These chains were developed principally for the lumber and pulp and paper industries for drives, transfer, and drag conveyors. They are also well adapted to elevator service of moderate speeds and loads.
Interchangeability between chains of various manufacturers is important with the widespread usage of these chains.
In September 1967, a subcommittee of American National Standards Committee B29 was appointed with members from the malleable chain industry to develop a standard for the "H" type mill chains, attachments, and sprocket teeth.
The standard developed by this committee restricts only those dimensions that affect interchangeability.
To promote the use of this Standard in the International Market, the metric equivalent of all dimensions is given.
The document was approved as an American National Standard on December 17, 1971.
The revision was approved by the American National Standards Institute on July 16, 1996.
Added to the 1996 revision is the minimum bolt hole diameter required for bolt diameter given for the particular attachments.
The 2001 revisions of both ASME B29.11M and ASME B29.14M have been incorporated to form the ASME B29.400-2001 standard. This Standard was approved as an American National Standard on November 27, 2001.