Full definition
A bearing puller, also known as an extractor, is a specialized mechanical or hydraulic tool employed to remove bearings from shafts or housings without inflicting damage on adjacent components. The design and functionality of bearing pullers are crucial in various industrial applications, as improper removal can lead to significant equipment failure and increased maintenance costs. Bearing pullers come in various types, including external jaw pullers, internal jaw pullers, hydraulic push-pullers, and bearing splitters, each suited for specific bearing configurations and sizes.
External jaw pullers typically feature either two or three legs and are designed to grip the outer race of the bearing, making them ideal for extracting bearings with shaft diameters ranging from 15 mm to 300 mm. Internal jaw pullers, on the other hand, are designed for removal from the bore of components, allowing technicians to extract bearings seated deeply within housings. Hydraulic push-pullers are particularly useful for larger bearings, as they provide the necessary force without the manual effort required by mechanical pullers. Bearing splitters, which are used to extract bearings via their inner race face, are valuable for applications where space is limited or accessibility is challenging.
When using a bearing puller, it is imperative that the force is applied correctly to the ring with the interference fit. This ensures that the bearing is removed smoothly while minimizing the risk of damage to the bearing itself and the surrounding equipment. The ISO 15 standard provides guidelines for the dimensions and tolerances of bearing pullers, ensuring compatibility and performance. Proper selection and use of bearing pullers can significantly enhance maintenance efficiency and equipment longevity.