"The customer wanted to put an
oil groove on the bearing cap but we didn't want to permanently modify the pattern," Loerwald said.
We significantly reduced the gas leakage between the piston-cylinder bores with the
oil groove piston.
An inclined
oil groove is made along the shaft's outer surface from the exit of the oil-feeding hole (Figure 2a[2]) to a cavity (Figure 2a[6]) located just beneath the thrust bearing.
Oil groove bushings are used with shafting as bearings.
And they have since each produced 19 million pistons, with a piston coming off the line every 12 seconds and accuracies of three microns maintained in the
oil grooves.
For these new pillars, Hasco developed the S14W self-lubricating guide bushings, which eliminate
oil grooves, and the Z13 linear ball-bearing bushings.
Typical applications include drilling piston ports in a hydraulic motor, drilling bleeder holes in door closers, milling keyways and
oil grooves in bushings, and drilling air holes in vacuum molds.
A fiber optic light source illuminates the part; a wide-angle lens captures a "flattened" image of the inside of the part wall; it provides the processing software with a circular ring pattern showing the inside diameter, end features, and internal features (e.g., end slots, oil holes, internal
oil grooves, and embossing).