| 摘要 |
An apparatus (101) for tightening a threaded fastener (102) of the kind having: a shank (110) with an axial bore (112), a gauge pin (120) positioned in the bore and connected to the shank, and an indicating member (122) rotatably supported on the gauge pin, the indicating member being arranged such that it is free to rotate when the fastener is unstressed but when the fastener is subjected to a predetermined tensile load the indicating member is held against rotation; the apparatus including: a receiving member (134), rotatably supported in the apparatus, for receiving the head (111) connected to or for receiving a nut engageable with the shank; a device (132) for effecting rotation of the receiving member; an engaging member (140) > rotatably supported in the apparatus, and being configured such that, in use, it is fixed rotationally relative to the indicating member,- wherein the apparatus includes a device (170) for sensing a predetermined resistance to rotation of the en a in member.
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