Crankmechanism

• Continuous shaft support, obtained with individual sleeve bearings for each plunger, reduced stresses making them intrinsically safe against shaft failure.
• Main and connecting rod sleeve bearings, thin shell bimetallic or trimetallic steel base type.
• Perfect alignment between power end and hydraulic end, assured by machining on a straight through boring of the frame area where the crosshead and the hydraulic cylinder are housed.
• Connection of the plunger to the crankmechanism through spherical joint with subsequent limited loads on the sealing area.
• Forced lubrication of the crankmechanism of balanced type, i.e. with oil inlet from both sides of crankshaft, assuring constant oil feed to all crankmechanism components during each cycle.

The smallest pump of the series, model PTO 160, is available also in a version adopting the traditional shaft support with two roller bearings at the shaft ends, together with all the other characteristics of the series.