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The 52 mm (2-inch) bore dynamically-balanced headstock spindle was beautifully-made from a high-tensile, alloy-steel forging; it was heat-treated, ground over its entire length (including the gear splines) and assembled in a dedicated-for-the-purpose room. It ran in three sets of grease-sealed, attention-free super-precision bearings - double-row cylindrical rollers at each end and a pair of angular-contact type as additional support in the middle.
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