Trolley Bracket
A custom bracket was required to adapt industry standard Webb trolly bracket running on S4 I-beam rails to the W8 I-beam being used on our in-house design/built crane. After iterating the design and achieving a factor of safety greater than 5.0 at ultimate strength, the design was released for machining. Beginning with a 2.5” thick A36 plate steel rough cut to a +.25” condition the part went through four setups before being sent out for black oxide. Spherical bearings were pressed in to accommodate minor misalignment in the rails as the gantry moves through the shop.
Some unique challenges this part gave were significant material removal (stock @ 109.5lbs - final @ 26.5 lbs = 83 lbs removed) along with precision bored holes for bearing press fit. Web thickness was within +/- .003” of the design and the bearing bores were within 0.0004” diametrically.
