4" Anti Runaway Chain Device, Part # 101878Details Designed for 4 I beam systems, this anti runaway device is installed on the decline portion of a vertical curve. Increased chain speed from chain failure causes the trolley to impact the stop arm with sufficient force to rotate the shank 180 into the actuated position, thus stopping the next trolley. Ships in: 10 days Click here for part dimensions and more information. Can't find a part? All of Webb's parts are not available online. Please

These 4" full ball bearing complement type trolley wheels have triple labyrinth seals with deep case hardened races and case hardened ball bearings

6” FBC type trolley wheels have triple labyrinth seals with deep case hardened races and case hardened ball bearings

This chain is used on systems with high chain pull

standard triple labyrinth seals

this indexing swivel has a 125-pound capacity rating

a standard "I" attachment and necessary sets of bolts and nuts

It can also be used on 10" up to 15" I beams with a special adapter kit

and shock loads

This caterpillar drive chain is designed for X-348 rivetless chain systems

All chain parts are hardened to increase resistance to wear

and wheels are bolted for easy replacement

These curves are made from 3” I-beam and are used to make the upper and lower parts of reverse and compound vertical curve