A radial fit bolt assembly includes a bolt having first and second sections with increasing diameter along a first direction, and an intermediate section axially interposed between the first and second sections. A sleeve radially surrounds the bolt and includes first and second sections with increasing inner diameter along the first direction, and an intermediate section axially interposed between the sleeve first and second sections. The first and second sections of the bolt are in radial contact respectively with the first and second sections of the sleeve, an annular gap is defined radially between the outer surface of the intermediate section of the bolt and the inner surface of the intermediate section of the sleeve, and an annular groove is provided on the outer surface of the intermediate section of the sleeve.

A method for preloading a bearing includes releasably, threadably, and directly attaching an attaching member to a circumferential outside surface of an exposed end of a threaded shaft of an axle or spindle. A plurality of extensions extends from a frame and is moved axially toward a wheel hub assembly to apply the preload to the bearing in a distal direction past the attaching member toward the wheel hub assembly. The extensions are configured to contact at least one of a wheel hub or a bearing of the wheel hub assembly when the attaching member is directly attached to the threaded shaft. An automated adjustment mechanism is configured to move the frame and the plurality of extensions axially towards the wheel hub assembly to apply a preload to the bearing within the wheel hub assembly.

A tensioner, typically hydraulic, for threaded members, the tensioner comprising: a base (4) and a piston (6) defining a pressure space (13) therebetween, the base (4) and piston (6) being arranged to be urged apart along an axis (17) upon introduction of a fluid into the pressure space (13); and a thread-engaging member (7), comprising a body portion (8) of the form of a sleeve and having a threaded interior (30) for engagement with a threaded member (2) and a piston engaging portion (9) carrying a protrusion; in which the piston (6) bears against the protrusion such that the piston (6) exerts a force on the protrusion when urged apart from the base (4) by the introduction of fluid into the pressure space (13); the tensioner further comprising a displacement sensor arranged to determining the relative position of the body portion of the thread-engaging member and the base, the displacement sensor comprising a first part (12) carried on the base (4) and a second part (11) carried on the body portion (8); typically the displacement sensor is a magnetic encoder.

A bolt tensioning assembly includes a bolt having a through-hole extending longitudinally through the bolt. A ram is inserted into the through-hole. A top cap is configured to be attached to a first end portion of the bolt. A load distributing member is configured to engage the ram at a location adjacent a second end portion of the bolt to distribute a force exerted thereon by the ram, and an actuator is connected to the top cap to exert a force on the ram to cause the ram to engage the load distributing member such that the bolt is placed under tensile stress.

Methods and apparatus for preloading a bearing are provided. These methods and apparatus include preload monitoring devices whereby the mechanic can accurately monitor and regulate the preload on a bearing or bearing assembly. Aspects of the invention may also be used to adjust the endplay on a bearing or a bearing assembly. In one aspect, the preload on the bearing is transmitted through a housing having a fluid pressure that can be detected and monitored. An apparatus for precisely rotating a nut and a tool for precisely rotating a nut are also provided. A bearing retaining nut arrangement that permits the loading or evaluating of a bearing inner race is also provided. The bearing retaining nut arrangement includes a first load-setting nut, a lock washer, and a second jam nut that secures the arrangement to a shaft.

A pressing device for a machine tool for processing or machining workpieces made of wood or plastics is provided with at least one support with a counter wedge surface. At least one pressing element is fastened to the at least one support. At least one wedge clamping device is provided that has at least one wedge pressure member with a first wedge surface that is resting on the counter wedge surface of the at least one support. The at least one wedge clamping device also has at least one adjusting element acting on the at least one wedge pressure member. The at least one wedge clamping device clamps the at least one pressing element on the at least one support. A machine tool with such a pressing device is provided.

Methods and apparatus for preloading a bearing are provided. These methods and apparatus include preload monitoring devices whereby the mechanic can accurately monitor and regulate the preload on a bearing or bearing assembly. Aspects of the invention may also be used to adjust the endplay on a bearing or a bearing assembly. In one aspect, the preload on the bearing is transmitted through a housing having a fluid pressure that can be detected and monitored. An apparatus for precisely rotating a nut and a tool for precisely rotating a nut are also provided. A bearing retaining nut arrangement that permits the loading or evaluating of a bearing inner race is also provided. The bearing retaining nut arrangement includes a first load-setting nut, a lock washer, and a second jam nut that secures the arrangement to a shaft.

An apparatus for preloading a bearing includes an attaching member, a frame, a plurality of extensions, and an adjustment mechanism. The attaching member is releasably attachable to a threaded shaft of an axle or spindle of a wheel hub assembly. The frame is axially separated from, and coupled to, the attaching member to allow the frame to move relative to the attaching member in an axial direction along the longitudinal axis. The plurality of extensions is configured to contact at least one of a wheel hub or a bearing of the wheel hub assembly when the attaching member is attached to the threaded shaft. The adjustment mechanism is configured to move the frame and the plurality of extensions axially towards the wheel hub assembly to apply a preload to a bearing within the wheel hub assembly.

In a method for extending a threaded bolt by tensioning a threaded end section thereof with a tensioning device, an exchange socket of the tensioning device is screwed onto the threaded end section and a first pin end of a pin slidable in the exchange socket is supported against an end of the threaded end section so that the pin moves in longitudinal direction as the exchange socket is screwed on. A sensor senses a longitudinal position of the pin relative to the exchange socket. An evaluation and control unit compares whether the detected longitudinal position of the pin relative to the exchange socket corresponds to a predefined minimum position value indicating sufficient thread engagement length. When the detected longitudinal position corresponds to the predefined minimum position value, the evaluation and control unit acts on the hydraulic supply to tension the threaded end section of the threaded bolt.

A hold down system for a building wall comprises a first rigid member and a second rigid member, the second rigid member being vertically spaced apart from the first rigid member, the first rigid member is supported on a horizontal member of a stud wall, the first and second rigid members including first and second openings, respectively; a tie-rod with a lower end portion for being anchored to an anchorage, the tie-rod extending transversely through the first and second openings, the tie-rod dividing the first and second rigid members into a first lateral section on one side of the tie-rod and a second lateral section on a diametrically opposite side of the tie-rod; first support and second support disposed between the first and second rigid members, the first support being disposed in the first lateral section, the second support being disposed in the second lateral section, the tie-rod extending through the first and second rigid members outside of the first support or the second support; and a nut threaded to the tie-rod, the nut exerting pressure on the second rigid member to place the tie rod under tension loading, the tension loading is transferred by the second rigid member to the first and second supports to subject the first and second supports to compression loading, thereby causing the first rigid member to press on the horizontal member of the stud wall via the first and second lateral sections of the first rigid member, thus distributing the compression loading.