Jack screw

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Related to jack screws: Thumb screws

Jack screw

A Jack (number 3) with a heavy cast iron base and a large screw that can be turned to raise or lower a load.
References in periodicals archive ?
This modified screw is called a jack screw. It's a good idea to mount these jack screws directly to the mold.
For example, removing parts such as a retainer and jack screws in turn saves weight and space.
This D-Sub shielded hood is designed with an optimum number of pieces: two half-metal covers in zamack (zinc alloy), two jack screws, and a steel fiber-reinforced plastic strain relief for EMI/RFI screening and mechanical cable retention.
The parallel--pardon the pun--in an industrial application is found when leveling jack screws (or similar devices) are used to "level out" the "wave" (and/or the out-of-parallelism) of the "bottom" surface.
Starting out with a pictorial quick-index, the catalog sends readers to the various product groups referenced, including standard and unique clamp styles--pull, swing, side, push, toe, cam, block hook, and strap, and a variety of clamp handles--plus work supports, jack screws, T-slot nuts, spring supports, sliding mounts, quick lock buttons and screws, and many more.
These complement the D-Sub line of standards, mini, and micro tail setbacks with through-hole and surface mount configurations, right-angle and vertical orientations and with a wide variety of mounting options and hardware including ground straps, threaded inserts, jack screws and board locks.
They do this even when the jack screws appear to be screwed down strong-finger tight.
"Securely" does not mean using pliers in an indiscriminate manner, but it might mean using a pair to moderately tighten the jack screws a tad more solidly than possible with fingers.
A variety of mounting options and hardware are available including ground straps, threaded inserts, jack screws and board locks.
No supporting spacers or jack screws are needed as with toe-clamp type devices.
The ports are available via two DB9 male connectors with jack screws to eliminate vibration worries in harsh environments and applications.
These plates feature milled-out 2D cavities, as well as numerous holes for components like jack screws, fastening screws, dowels, and springs.