| 摘要 |
1. Arrangement for pretensioning a bolt (4) connecting two machine parts (2, 2'), for which purpose a tensioning device (10, 11, 13) is supported on one of the machine parts and engages on a thread part (9) belonging to the bolt (4) to be tensioned and attached coaxially to in the bolt end, the load bearing length of the thread part (9) being equal to or less than the height of the nut (6) screwed on the bolt (4), and a tie bolt (10) provided with an external thread and belonging to the tensioning device (10, 11, 13) being screwable into the said bolt (4), characterized in that the thread part (9) and the corresponding external thread of the tie bolt (10) are made conical. |
