Dodge Build Elm. Extension
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EXTENSIONS to the Kew factory of I—, Dodge Brothers (Britain), Ltd., at a cost of ilm., provide for the production of the Dodge siwcylindered petrol engine in this country. Previously, these units were imported from Canada.
Although peak production has not yet been reached at Kew, the yearly output is already at the rate of 12,000 engines. Some idea of the degree of mechanization that has been reached in the new factory can be deduced from the cylinder-block line, on which 60 different machines are employed.
The oil gallery in the Dodge engine is 27 in. long, and the machine which forms the gallery has two drills travelling towards each other from each side. Just before the drills would meet, one retracts and the other breaks through.
Perfection of finish is aimed at in the cylinder bores, which are first rough and semi-finish bored and then finish bored; semi-finish and finish honing machines complete the operations. Permissible limits on the bore are plus or minus 0.0005 in.
Each cylinder head, after machining, is specially checked to ensure that the volume of each combustion chamber is the same within a margin of 3 c.c. of the nominal. The main-bearing caps are broached in a 10-ton surfacebroaching machine.
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