| 摘要 |
<p>PURPOSE:To eliminate the wrong positioning of a groove and dispense with a drop- off prevention member, by providing the peripheral part of a guide member with grooves which extend almost parallel with each other and by fitting a part of a dust cover in the groove. CONSTITUTION:The peripheral part of the guide member 1 is provided with the groove 5 comprising the grooves 5a, 5b which extend almost parallel with each other and perpendicularly to the axis of the guide member, and an arc-shaped groove 5c continous to the former grooves 5a, 5b. A part of the dust cover 4 is fitted in the groove 5. Since the groove 5 is made by using a core 7, the groove is prevented from being wrongly positioned as in the use of a two-split core. Because the groove is made only by casting, it is not necessary to process the groove afterward and attach a drop-off prevention member.</p> |
