. The Street railway journal . ses are made in two parts and milled from thebar, and being made in this way, the bearings areparallel with the outside. The cones and ball cases,after being tempered, are ground to accuracy, therebyinsuring a perfect bearing. Ball cases are apt to loosen, from various causes,and there must be some way of holding them securelyto the rims. Ball cases, whether made in one or twopieces, simply forced into the rims, or even with hotmetal poured around the ball case, are not safe, and atjust the important time and when needed most, are aptto become loose. The holes in
. The Street railway journal . ses are made in two parts and milled from thebar, and being made in this way, the bearings areparallel with the outside. The cones and ball cases,after being tempered, are ground to accuracy, therebyinsuring a perfect bearing. Ball cases are apt to loosen, from various causes,and there must be some way of holding them securelyto the rims. Ball cases, whether made in one or twopieces, simply forced into the rims, or even with hotmetal poured around the ball case, are not safe, and atjust the important time and when needed most, are aptto become loose. The holes in the rims are perfectly true. Conse-quently, when the ball cases are pressed in the rimsthe alignment is perfect. The roll is then finished onits bearings. A key seat cut in the rim and a steel keywith ends bent into a slot in the ball case prevent theball cases from coming out or turning, and the flangeson the outside of the ball cases prevent them from going this mechanism the ball cases are made absolutely
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
