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In manufacturing, threading is the process of creating a screw thread.More screw threads are produced each year than any other machine element. [1] There are many methods of generating threads, including subtractive methods (many kinds of thread cutting and grinding, as detailed below); deformative or transformative methods (rolling and forming; molding and casting); additive methods (such as ...
Common sashiko motifs are waves, mountains, bamboo, arrow feathers, shippÅ-tsunagi, pampas grass and interlocking geometric shapes, amongst others. [4] Sashiko embroidery is traditionally applied with the use of specialist needles and thread, though modern day sashiko may use modern embroidery threads and embroidery needles.
Buttonhole stitch – for reinforcing buttonholes and preventing cut fabric from raveling; Chain stitch – hand or machine stitch for seams or decoration; Cross-stitch – usually used for decoration, but may also be used for seams; Catch stitch (also 'flat' and 'blind' -catch stitch) – flat looped stitch used in hemming
Henry Maudslay's early screw-cutting lathes of circa 1797 and 1800.. A screw-cutting lathe is a machine (specifically, a lathe) capable of cutting very accurate screw threads via single-point screw-cutting, which is the process of guiding the linear motion of the tool bit in a precisely known ratio to the rotating motion of the workpiece.
In drawn thread work and cutwork, the foundation fabric is deformed or cut away to create holes that are then embellished with embroidery, often with thread in the same color as the foundation fabric. When created with white thread on white linen or cotton, this work is collectively referred to as whitework. [23]
thread Thread is a fine type of yarn. thimble A thimble is a protective shield worn on the finger or thumb. third hand A third hand is a clamp that holds the fabric to be sewn. toile Toile is the British English term for a test garment. The equivalent American English term is muslin. trim
A diagram of a solid single-form thread cutting tool A solid multiple-form thread milling cutter. Whereas a hob engages the work much as a mating gear would (and cuts the blank progressively until it reaches final shape), a thread milling cutter operates much like an endmill, traveling around the work in a helical interpolation.
Self-tapping screws can be divided into two classes: [3] those that displace material (especially plastic and thin metal sheets) without removing it, known as "thread-forming" self-tapping screws, and self-tappers with sharp cutting surfaces that remove the material as they are inserted, termed "thread-cutting" self-tapping screws.