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  • Name that thread
    Four basic steps identify threads on industrial hydraulic fittings. Hydraulic fittings have either tapered or parallel threads. But tapered ones are not always pipe threads, and pipe threads can be parallel. Using a thread-pitch gage is the easiest way to determine pitch. Use calipers measure
  • Coarse Pitch Metric Thread Dimensions per JIS B 0205:1997 (.pdf)
    When designing a mechanism that requires threaded holes, it is suggested that you use a reference table to accurately select the proper thread size for your application.
  • Variable Leak Valves: Precision Leak
    All-metal ULV series precision ultrahigh vacuum leak valves are designed to control gas admission into high and ultrahigh vacuum systems. They are manually actuated via a cantilever arm fitted with extra-fine pitch threads for precise adjustment. They are ideally suited for handling hot
  • Leadscrews roll
    Leadscrews provide finer pitch and faster motion than comparable ball screws. These leadscrews are all less than 80-mm long with both right and left-hand threads and leads as fine as 0.65 mm. Leadscrews can have fast leads up to 100 mm/rev that are both efficient and accurate. This type of thread
  • Backlash Data for Various Leadscrew Options Available from EADmotors
    Backlash is the total amount of free movement between a lead-screw and a nut as measured along the axis of motion. Factors that influence backlash relate to thread geometry and especially include pressure angle and pitch diameter.
  • Back Driving Forces on Linear Actuators
    Back driving force refers to the force value, that when applied to the leadscrew on a linear actuator that is not energized will result in linear travel of the leadscrew. Several factors are considered for determining the back drive force for a specific application. Thread pitch, profile, friction
  • Screw Jacks
    on a precision pitch screw for fast, efficient lifting. They require relatively little drive effort. Machine screw jacks use screws with less pitch, and usually do not have ball bearings. They are somewhat less efficient and require more effort than ball screw jacks; however, they can better resist back
  • Worm Gear Ratio of Model 520 Geodetic Platform Tiltmeter Legs
    To level the X- and Y-axes of the Model 520-W Geodetic Platform Tiltmeter, the user turns a knob that raises or lowers an invar screw by means of a worm gear assembly. One complete 360° turn of the knob turns the screw by 6°, or 1/60 of a revolution. The ½-inch diameter screw has a pitch of 40
  • The Ultimate Tapping Screw for Plastics
    novel, but material, equipment and tooling have evolved to permit pitch, diameter and thread form combinations that generate remarkable results when threading into most thermoplastic alloys. What we are defining is a 30 Degree thread form called Type FT. By comparison, a standard Type B thread
  • About Ball Screws
    the trailing end of the nut, they are deflected or guided from this "pitch" contact by means of a return tube and returned to the leading end of the circuit. There, the cycle resumes and the balls recirculate continuously. (Land Diameter) The outside diameter of the screw thread. (Root Diameter

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  • Machinery's Handbook 29 - Threads and Threading
    16-Thread Series: The 16-thread series (16-UN) is a uniform pitch series for large diameters requiring fine- pitch threads .
  • Machinery's Handbook 29 - Fasteners
    Length of Thread.—Machine screws of sizes No. 5 and smaller with nominal lengths equal to 3 diameters and shorter have full form threads extending to within 1 pitch ( thread ) of the bearing surface of the head, or closer, if practicable.