Method of removing the pulley often depends on the type of planting and the type of mechanical mates. In most cases it is enough to tap with a hammer at the diametrically opposite ends of the pulley for it vanishing from the seat, but time and corrosion can play havoc. In this case, can not do without appropriate methods and tools.
A low-power motors often have a spline fit of the pulley without overmolding. In these cases, the pulley is held against displacement by a snap ring or a washer or a threaded connection. In these cases, it is sufficient to untwist the retaining nut and remove the snap ring. You can also use reusable ring with a serrated edge, which will either have to rubyvale or long to level at the installation site the awl and a screwdriver.
Sometimes for removing the pulley it quite mild to warm. With increasing temperature the metal expands, which decreases the degree of pressing. If the pulley was stuck on a shaft the method of pre-heating, without a specified procedure of withdrawal just will not do: the diameter of the shaft at a fraction of a millimeter larger than the hole in the pulley, from which the degree of tightness is too high.
The pulley is heated from the edges, gradually obstuctive it from different sides in the direction of shaft end. In this situation it is impossible to prevent indirect heating of the shaft, otherwise it will also be prone to linear expansion and further is clamped pulley. If overheating happens, the connection must allow to cool, then repeat the procedure again. With a significant width, the seats can take a few tries before heating.
It often happens that the pulley can lift using a simple puller. It is a thick metal plate in the center of which there is a hole. Coaxially to the hole to one of the surfaces of the plate are welded a large nut. On the same line passing through the Central hole in the plate make the slot of a small thickness. To use the puller you will also need a bolt the size of the nut that is welded to the puller and two bolts of smaller size with large washers.
In the pulley it is necessary to drill two holes, located on lines passing through its center. In these holes a single pass with a tap cut thread, the diameter of which pick up the bolts for the puller. In the shafts of the motor has a centering groove in which you must use the grease to fix a bearing ball of desired size. The center bolt of the puller will also have to handle: in the end you need to make a hole of spherical shape.
The puller is attached to the pulley by bolts passing through the slots and screwed into threaded holes. The center bolt rests on the ball, mounted in the locating groove of the shaft. In the process of screwing the bolt will release the puller from the shaft, so the pulley will be shifted from the seat. If the stroke of the bolt is not enough to fully offset pulley, under the side bolts you need to put a few large nuts.
The removal of pulleys with mechanical fastening
A low-power motors often have a spline fit of the pulley without overmolding. In these cases, the pulley is held against displacement by a snap ring or a washer or a threaded connection. In these cases, it is sufficient to untwist the retaining nut and remove the snap ring. You can also use reusable ring with a serrated edge, which will either have to rubyvale or long to level at the installation site the awl and a screwdriver.
Heat the pulley is removed
Sometimes for removing the pulley it quite mild to warm. With increasing temperature the metal expands, which decreases the degree of pressing. If the pulley was stuck on a shaft the method of pre-heating, without a specified procedure of withdrawal just will not do: the diameter of the shaft at a fraction of a millimeter larger than the hole in the pulley, from which the degree of tightness is too high.
The pulley is heated from the edges, gradually obstuctive it from different sides in the direction of shaft end. In this situation it is impossible to prevent indirect heating of the shaft, otherwise it will also be prone to linear expansion and further is clamped pulley. If overheating happens, the connection must allow to cool, then repeat the procedure again. With a significant width, the seats can take a few tries before heating.
The pulley is removed using a suitable puller
It often happens that the pulley can lift using a simple puller. It is a thick metal plate in the center of which there is a hole. Coaxially to the hole to one of the surfaces of the plate are welded a large nut. On the same line passing through the Central hole in the plate make the slot of a small thickness. To use the puller you will also need a bolt the size of the nut that is welded to the puller and two bolts of smaller size with large washers.
In the pulley it is necessary to drill two holes, located on lines passing through its center. In these holes a single pass with a tap cut thread, the diameter of which pick up the bolts for the puller. In the shafts of the motor has a centering groove in which you must use the grease to fix a bearing ball of desired size. The center bolt of the puller will also have to handle: in the end you need to make a hole of spherical shape.
The puller is attached to the pulley by bolts passing through the slots and screwed into threaded holes. The center bolt rests on the ball, mounted in the locating groove of the shaft. In the process of screwing the bolt will release the puller from the shaft, so the pulley will be shifted from the seat. If the stroke of the bolt is not enough to fully offset pulley, under the side bolts you need to put a few large nuts.
