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Fangbolt

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  1. The CI railway chair in the picture is a 3 hole DW&WR chair and is therefor quite old. In service railway chair could be broken by severe wheel flats of other impact loads. The two upstands on a railway chair are / were known in CIÉ as the jaw (the part where the rail rested against), and the gub (the part where the key rested against). Keys were usually tapered and made of wood or steel. Keeping keys tight in service was labour intensive. In later years a new type of steel key was introduced called a Panlock which was addressed to problem of loosening or falling out. Panlock ke
  2. Railway chairs were cast in grey iron. In Ireland there were chairs with 2 holes, 3 holes and 4 holes. In plain track there were sometimes two types of chair used, the intermediate or common chair and the joint chair. Sometimes, the joint chairs wre handed e.g., Right hand and left hand. Joint chairs were always heavier than common chairs. Nearly all chairs have a rectangular base with rounded corners except for a CS1 type which was used on BH concrete sleepers and had an elliptical base. Common chairs weigh about 44 lbs and joint chairs are a bit heavier. Each railway had
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