Allow for proper maintenance, when removal or adjustment of the machine location is required.Control and minimize the effects of high torque applications.Minimize thermally-related problems, such as radial or axial thermal growth.If dowel pins are used, engineering should be consulted as to the proper placement of the dowel locations. The grooved half locks pins in position, while the smooth half can act as a pivot. High horsepower machines-typically over 1000 HP. Enter e-mail addresses in the fields below.High torque applications, such as large cooling tower gearboxes.High torque, high vibration machines such as hammer mills and crushers.But there are some circumstances in which dowel pins are recommended, such as: ![]() Internal Threaded Dowel Pins, Packaging Type: Box, Size: Din 7979 / Iso 8735. In most general industrial applications, the use of dowel pins is not necessary. Stainless Steel Internal Threaded Dowel Pins, Packaging Type: Packet, Packaging Size: 250 Piece. I never witnessed any machine failures due to leaving out the dowel pins. Engineers would state that the hold down bolts, if sized properly, were sufficient to overcome any shear forces created by the machine start-up. It was not as well known that the dowel pin holes should be reamed with a tapered drill, and THEN reinstall the dowel in the machine. In almost every instance, driving the tapered pins into the base would misalign the motor. Millwrights would replace a motor, align it with dial indicators, and then drive tapered pins through the motor foot and into the base plate. Some of these machines were small-less than 25 horsepower, yet they were still dowelled. When I started in maintenance in the early 1980’s, tapered dowel pins were placed into almost every motor, gearbox, and pump I worked on. From a machinery alignment standpoint, dowel pins can be a real cause of headaches. dowel - pin made of cylindrical metal rod or wire having at the cylindrical portions, and widened to form fins which project at a portion which is. This is usually due to high torque loads on start-up.ĭowel pins, both tapered and straight, are used in some machinery installations to “pin down” machinery to prevent unintended movement.
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