Puller
The puller is a tool for loosening strained connections from components in mechanical engineering .
It is required to loosen pressed, shrunk or drawn in components that are held in their position by their own frictional force . The pulling force is generated by a screw or a hydraulic press .
- The best known are two- or three-legged universal pullers for loosening pressed-on parts from axes or from bores, such as. B. bushings, ball bearings and. Ä. The width and depth of attack can be varied with these pullers.
- For loosening parts that are drawn into a tapered bore, such as B. Ball joint pins in steering axles of automobiles , pullers in the form of short massive inverted pliers are used. One side is pushed apart with a screw, the other pushes the bolt out of the tapered bore.
- Component-specific extractors mostly have a special receiving element (mostly a thread ) and a concentric release or extraction screw. But they can also have very special shapes.
- Many bicycles have a conical square on the pedal axis. To loosen a crank , a crank puller is screwed into it. In some cranks, the pull-off function is already integrated through a screwed-in socket : The crank fastening screw (hexagon socket) is loosened, then screwed up further. In doing so, it presses from the inside on the bushing that presses the crank off the axle.
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Wiktionary: puller - explanations of meanings, word origins, synonyms, translations
