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Pullers made primarily for Type I [bolt type] cranksets usually have a rotating collar on the end of the "bolt." This collar is the part that actually pushes against the end of the spindle to pull the crank off. If you use this type of tool on a Type II [nut type] spindle, it will work, but the threaded end of the spindle may damage the pivot of the tool's collar. Also, some Type I pullers simply don't fit on Type II cranksets: the puller's "nut" may interfere with the threaded boss on the spindle, or it may not be possible to unscrew the puller's "bolt" far enough to allow the puller to be threaded into the crank | Pullers made primarily for Type I [bolt type] cranksets usually have a rotating collar on the end of the "bolt." This collar is the part that actually pushes against the end of the spindle to pull the crank off. If you use this type of tool on a Type II [nut type] spindle, it will work, but the threaded end of the spindle may damage the pivot of the tool's collar. Also, some Type I pullers simply don't fit on Type II cranksets: the puller's "nut" may interfere with the threaded boss on the spindle, or it may not be possible to unscrew the puller's "bolt" far enough to allow the puller to be threaded into the crank | ||
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''Kurbelabziher, der nur bei Wellen mit Schraubenbefsteigung funktioniert,<br>weil er sich nicht weiter zurückfahren lasst.'' | |||
[[Datei:ExtractorIMG 5225sm.JPG|center|Kurbelabziher, der nur bei Wellen mit Schraubenbefsteigung funktioniert]] | |||
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When a tool made for a nut-type spindle is used with a bolt-type (female threaded) spindle, the sides of the "bolt" of the puller rub against the edges of the spindle threads that the crank bolts screw into. There is a slight possibility that the spindle threads could be damaged by this, but bottom bracket spindles are made of such very hard steel that the risk is small. You can solve this problem easily by inserting an undersized bolt into the end of the spindle -- the bolt's head should fit inside the square opening in the crank, but protrude beyond it, so the puller bears on the head of this bolt. | When a tool made for a nut-type spindle is used with a bolt-type (female threaded) spindle, the sides of the "bolt" of the puller rub against the edges of the spindle threads that the crank bolts screw into. There is a slight possibility that the spindle threads could be damaged by this, but bottom bracket spindles are made of such very hard steel that the risk is small. You can solve this problem easily by inserting an undersized bolt into the end of the spindle -- the bolt's head should fit inside the square opening in the crank, but protrude beyond it, so the puller bears on the head of this bolt. |