Fastening element (1), in particular mounting bolt, comprising a fixing portion (10), an intermediate portion (20) and a fitting portion (30), wherein the fastening element (1) extends along a longitudinal axis (L), wherein the fixing portion (10) comprises fixing structures, in particular a thread, wherein the intermediate portion (20) is arranged in the direction of the longitudinal axis (L) between the fixing portion (10) and the fitting portion (30), wherein the fitting portion (30) is substantially rotationally symmetrical about the longitudinal axis (L), wherein the fitting portion (30) has an outer support surface (34), wherein the support surface (34) has a clearance fit, and wherein at least in the fitting portion (30) a lubrication groove (32) is provided.

An electrically contacting fastening device has a threaded bolt and a nut, between which an electric contact element can be arranged. The threaded bolt has a contacting portion for creating planar contact with the contact element, and a threaded portion. The nut can be secured on the threaded bolt by way of the threaded portion and at an end face has a contacting area for creating planar contact with the contact element. The threaded portion of the threaded bolt is provided with a lubricant coating and the contacting portion of the threaded bolt, the contact element and the end-face contacting area of the nut are permanently free of lubricant.

An ease of drive coating for a fastener is formulated from a resin having at least two different friction reducing components, such as silicone and graphite. A fastener and fastener strip include a resin formulation with at last two different friction reducing components.

A joint bushing that accommodates the dithering and sliding in multi segment wind turbines. The joint bushing includes a self-lubricating liner that is a composite system incorporating woven Polytetrafluoroethylene fibers intermixed with structural reinforcement fibers in a composite matrix. The composite system provides sufficient life without requiring re-lubrication.

The presently disclosed quick adjust slide knob addresses the ‘Backing-Off’ problem present with various conventional nuts. The quick adjust slide knobs can be quickly positioned along a threaded rod by applying pressure to an exposed surface of a partially threaded nut. When the knob is placed against a work surface and the user releases pressure from the partially threaded nut, the thread pattern on the partially threaded nut meshes with the matching thread pattern on the threaded rod. The device can then be twisted, which will translate the device along the threaded rod, to apply a larger load to the work surface. The threaded rod may include one or more key-ways shaped to allow a locking tab housed within the knob to stop the device from freely disengaging the threaded rod to protect a user from potential injury caused by the fastener unexpectedly backing off and disengaging.

A joint bushing that accommodates the dithering and sliding in multi segment wind turbines. The joint bushing includes a self-lubricating liner that is a composite system incorporating woven Polytetrafluoroethylene fibers intermixed with structural reinforcement fibers in a composite matrix. The composite system provides sufficient life without requiring re-lubrication.

A joint bushing that accommodates the dithering and sliding in multi segment wind turbines. The joint bushing includes a self-lubricating liner that is a composite system incorporating woven Polytetrafluoroethylene fibers intermixed with structural reinforcement fibers in a composite matrix. The composite system provides sufficient life without requiring relubrication.

An airfoil for a gas turbine engine according to an example of the present disclosure includes, among other things, an airfoil section that extends from a root section. The airfoil section extends between a leading edge and a trailing edge in a chordwise direction and extends between a tip portion and the root section in a radial direction, and the airfoil section defines a pressure side and a suction side separated in a thickness direction. The airfoil section includes a metallic sheath that receives a composite core, and the core includes first and second ligaments received in respective internal channels defined by the sheath such that the first and second ligaments are spaced apart along the root section with respect to the chordwise direction. The first and second ligaments define respective sets of bores, and the respective sets of bores are aligned to receive a common set of retention pins.

In one example, a magnet-driven connector may Include a module housing and a core module disposed In the module housing. The core module may include a protruding screw and a rotary magnetizer in contact with the protruding screw to magnetically drive the protruding screw to engage or disengage with a threaded hole of a nut portion. Further, the magnet-driven connector may include an elastic member between the core module and a bottom cover of the module housing. Furthermore, the magnet-driven connector may include a low-friction film disposed between the core module and the module housing.

A bolted joint for coupling two components that undergo thermal expansion and contraction includes a bolt having a head and a stem, the bolt configured to provide a clamping force between the two components. A first washer having a thermal resistant, low friction coating is configured to be disposed between one of the two components and the bolt head to enable the one component to slide relative to the bolt during the thermal expansion and contraction, while maintaining the clamping force, to facilitate preventing bending or shearing of the bolt.