For Frame Rigidity
To provide increased durability, E2 tie rods and tie rod nuts are designed and manufactured to assure an extremely long life even in non-ideal conditions. For example:
• On standard tie rod nuts, more than 90 percent of the preload force is distributed over the first three threads of the nut. The tie rod nuts on the E2 are machined with a groove in the bottom to permit the lower portion of the nut to flex and distribute its load over the entire nut. This allows the nuts to withstand loads that would cause standard nuts to fail.
E2 tie rods are located in the upright's center of gravity to assure that the upright compresses uniformly. High tensile cast iron is used for uprights for presses less than 800 tons to help dampen snap-thru forces. A special grade steel is used for uprights on higher tonnage presses to maintain the best strength-to-weight ratio and provide the required deflection characteristics. All uprights are machined with large upright openings to provide room for material feeding equipment.
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