. Railway age gazette . is known as a beveled wheel in connectionwith flanges of a corresponding bevel. Beveling a wheel causesit to present a wedge shape and the theory is that should thewheel break, the pieces will be retained by the flanges, due to thewheel being thicker at the center than at the point where theouter edges of the flanges bear against the wheel. The largeusers of grinding wheels were recently consulted with the objectin view of finding out which type of protection was being good many replies showed a preference for the protection flangemethod. This was probably due to
. Railway age gazette . is known as a beveled wheel in connectionwith flanges of a corresponding bevel. Beveling a wheel causesit to present a wedge shape and the theory is that should thewheel break, the pieces will be retained by the flanges, due to thewheel being thicker at the center than at the point where theouter edges of the flanges bear against the wheel. The largeusers of grinding wheels were recently consulted with the objectin view of finding out which type of protection was being good many replies showed a preference for the protection flangemethod. This was probably due to the fact that such experienceas had been had with protection hoods was with designs whichwere not heavy enough or were made of weak materials. Unfor-tunately, there are hoods in use today which would not proveadequate in case of accident. In order to determine the relative value of an approved typeof protection hood and approved beveled steel flanges, breakagetests were conducted under actual working speeds. It was ob-. Norton Model D Protection and Dust Hood served that in none of the hood tests did a piece of the wheelleave the hood in a way that could have caused damage. Thetests show conclusively that a well designed protection hood,made of the right material, and properly adjusted, affords ampleprotection for straight-side wheels even when they are mountedbetween standard straight relieved flanges one-half the diameterof the wheel. It is possible to break pieces from a wheel by asevere blow when there is only 2 in. of the wheel projecting beyondthe flanges. With protection flanges, no matter how little thewheel projects beyond the flanges, an operator has no protectionfrom injury in case a piece of the wheel breaks off outside of theflanges, whereas with a hood protection is almost absolute. Protection flanges cannot offer complete protection, but in in- stances where a hood would interfere with the proper use of thewheel, flanges offer the next best method of protection.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1913
