Spiral. "Dream of Red Mansions" third four back: "very hot look when I saw two glass vials, there is a three-inch size, silver screw top lid, light yellow sign that read 'Melilot Qing Lu', then a written 'Roses Qing Lu '. "
Translated by Google
Screw-called
Screw known. Wei Wei, "East" Part III Chapter I: "Back to turn a question, it really is a car, on a screw lose."
Translated by Google
Screws
螺丝
Is a common saying screw fasteners, everyday spoken language. luósī [Screw] screws. See "screw" Screw specification definition and understanding Various types of screw thread A: Triangle thread (60 degrees): binding / locking B: Triangle pipe thread (55 degrees): binding / locking C: trapezoidal thread (30 or 29 degrees): Power Transmission D: Square thread (90): Power Transmission Value of the screw Screw is an integral part of daily life necessities industries: such tiny screws cameras, eyeglasses, watches, electronics and other used; television, electrical goods, musical instruments, furniture and other general screws; As for engineering, construction, bridge using a large screw , nuts; transportation equipment, aircraft, train, automobile, etc., compared with the size of the screw. The screw has an important task in the industry, as long as there is on the earth industry, it is always important to the function of the screw. Screw type, whether a large screw with a small screw glasses or large heavy electrical engineering with its many types, the main purpose of using a fixed height of industrial products consisting of one, if not often occur in the use of secret between teeth and teeth with , tighten the screws too hard head broken off, or bad tooth pattern lock is not tight and so failed to meet the conditions of use are quality precision problems. Screw the "amount of product", not hand-made works of art, in mass production in order to achieve high-precision quality and popular price stable supply to consumers for the purpose. Screws are usually 6g accuracy level (2, American standard "IFI" is 2A teeth), crude spiral construction engineering for 8g level (level 3, "IFI" is 1A teeth). This book is aimed hex head screws, technical focus is generally small screw head type (iron screws, wood screws, machine screws) and other manufacturing processes are provided for reference.
Translated by Google
Common types of screws
常用螺丝种类
A: Machine Screw: Machine Screws B: Tapping Screw: self-tapping screws (points used in metal and plastics used in two kinds) B-1: Sheet Metal Tapping Screw (iron teeth self-tapping screws). B-2: Plastic Tapping Screw (plastics, self-tapping screws). C: Wooden Screw: Wood screws D: Drywall Screw: cement wall screws E: Self Drilling Screws drilling screws (stainless steel self drilling screws, drilling screws composites) for this product A stainless steel plate, metal steel, galvanized steel, engineering and installation. 2 metal curtain wall metal light compartment and other indoor and outdoor installation. (3) Average angle, channel, iron and other metal materials combined installed. 4, car trunks, containers, shipbuilding, refrigeration equipment and other assembly work. This product features: 1, drilling and tapping, locking once, combined with strong. 2, saving construction time, improve work efficiency. E-1: STAINLESS STEEL SELF DRILLING SCREWS stainless steel self drilling screws E-2: Bi-Metal Self Drilling Screws Composite Drilling Screws
Translated by Google
Common screw Material
a.Low Carbon Steel: Carbon steel of low carbon steel, carbon steel, high carbon steel and alloy steel. b SS-304:. Stainless Steel 304, 316 are all stainless steel or the like c SS-302:. Stainless Steel 302: Structure toughness d Aluminum 5052:. Aluminum 5052 d Brass:. brass e Bronze:. Bronze . f UNS C11000 Copper: Copper Antimony
Translated by Google
Common screw specifications and labeling
常见螺丝规格与标示
常见螺丝规格与标示
常见螺丝规格与标示
常见螺丝规格与标示
常见螺丝规格与标示
A: Metric Screw B: U.S. regulatory screws C: inch screws A: Metric Machine Screw: Metric Ex: M3 x 6 - PPB: M3 machine screws, 6mm long, cross, round flat head, chrome black. Finish Code: Appearance handling specifications Head Code: Head Shape Thread Code Screw Type Drive Code: head cross ditch, feature models Length Code: Screw Length (mm) A-1: Thread Code: Screw Type Metric screws directly to the screw diameter marked models, If M3 screw diameter is 3.00mm;. M4 screw diameter is 4.00mm. Metric Thread Size x Pitch: Note: Metric screws on the rear of the screw type, screw thread pitch is sometimes indicated. If M3x0.5, M4x0.70, M5x0.8, M6x1. But because standards often do not mention. A-2: Length Code: screw length: Metric screws, screw length directly marked, in mm. The total length of the screw marked, counting only the length of the head less, excluding head height. But flat head screw exception, the total length of the screw marked with head height. A-3: Drive Code / head cross ditch, features.
Translated by Google
Commonly used specifications
螺丝 一般常用规格
螺丝 一般常用规格
螺丝 一般常用规格
螺丝 一般常用规格
a Slotted:. word (Minus) b Phillips:. Phillips (Plus) c Phil-Slot:. word / Cross . d Hex Scoket: Hexagon e One Way:. unidirectional (may only be locked into non-exit) A-4: Head Code / head shape. a Flat:. flat head (after the lock into the top flush with the work piece) . b Oval: Salad Head . c Round: Round . d Pan: round flat head . e Truss: great circle flat head . f Hex: hex head. A-5: Finish Code / exterior handle. Metric self-tapping screws: in commodity directly behind the label Tapping Type. Ex: M3 x 6-PPB, Tapping Type: M3 self-tapping screws, 6mm long, cross, round flat head, chrome black. Generally by product or labeled, and then determine the use of Sheet Metal or plastic parts. *** Teeth to the number of teeth per inch. ***
Translated by Google
Screw length
螺丝长度
螺丝长度
螺丝长度
螺丝长度
螺丝长度
Screw length is subject to U.S. regulatory translated, is the metric mm size. Conversion formula: (Length Code / 32) x 25.40 = metric length mm B-3, B-4, B-5: Marked same way as the metric.
Translated by Google
Inch screws
英制螺丝
英制螺丝
英制螺丝
C-1: Thread Code: Mark all the denominator is 8, and then directly called designation molecules. Ex: 1/8 x 0.50-PPB: 1 minute Screw x 0.50 "long, PPB Ex: 5/16 x 0.50-PPB = 2.5 / 8 x 0.50-PPB: 2 and a half Screw x 0.50 "long, PPB Ex: 5/32 x 0.50-PPB = 1.25 / 8 x 0.50-PPB: 1 of 2% and a half screw x 0.50 "long, PPB Ex: 1/4 x 0.50-PPB = 2/8 x 0.50-PPB: 2 points Screw x 0.50 "long, PPB Note: sometimes labeled coarse or fine teeth. UNF: fine tooth: more commonly used in the electronics industry. UNC: Coarse: Heavy machinery structure is more commonly used. Ex: 3/8 x 0.50, UNF-PPB: 3 points fine screw x 0.50 "long, PPB. C-2: Length Code: Marked in inches, shall be multiplied by 25.40 converted to mm. Compliance with the deduction amount is consistent with the metric metric thread tooth type, is consistent with the English thread inch thread. You can also use the amount of thread caliper diameter, and pitch. Metric thread diameter is in millimeters, so as 6,8,10,12,18,20 mm pitch but also in millimeters, as 0.5,0.75,1,1.5,2,3, etc. Inch thread diameter in inches as a unit, (equal to 25.4 mm per inch) such as 3/16, 5/8, 1/4, 1/2, and so therefore the amount of outside diameter metric caliper readings often with irregular decimal . Inch Pitch is the number of teeth per inch with representation. The caliper _set_ at 25.4 mm, put a foot aligned threaded cusp tip, the tip of the other foot as the tip is aligned thread inch thread, such as missing the tip should be a thread metric thread. When measuring the thread pitch is best to pour the cusp printed on the white chalk, chalk printed on clear, easy to measure. Metric measuring a length of the pitch should be measured, such as 10,15,20, mm, etc., count the number of teeth containing calculated pitch With inch thread size is defined as the unit for inch thread, such as:. G1 "with metric thread sizes specified in millimeters for metric threads, such as:. M30. Imperial is one inch (24.5 cm) to _set_ the number of teeth, generally 55 degree angle. Metric is the distance between the two is the number of cusps MM to pitch, generally 60 degree angle Anchor bolts: the machinery used to tighten the screws on the ground. Also called anchor bolts. Inch screws distinction made by visual beauty difficult to separate, the British and American-made screws difference is that the imperial screw thread rolling angle is 55 degrees, while the US-made screws thread rolling angle of 60 degrees, which is two standard screws in most it is universal, but 1/2 of screws can not be, because the British standard thread 1/2 is 1/2-12 teeth, while the U.S. system is a 1/2-13 teeth.
Translated by Google
Screw relevant bilingual
Machines (treadmill) car with a screw, the axis Screws And Shafts For Motorcycle Or Bicycle Sewing machine with a screw, the axis Screws And Shafts For Sewing Maching _Set_ Screw Socket _Set_ Screws Stainless steel wide Screw Stainless Steel Coarse Thread Screws Stainless steel height Screws Stainless Steel High-Low Thread Screws Stainless Steel Machine Screw Stainless Steel Machine Screws Stainless steel self drilling screws Stainless Steel Self Drilling Screws Stainless steel self-tapping screws Stainless Steel Self Tapping Screws Stainless steel self-cutting screws Stainless Steel Thread Cutting Screws Stainless Steel Triangle Screw Stainless Steel Tri-Lobular Thread Screws Screw marked Label format thread labeled as follows: Thread code - thread tolerance code (diameter, top diameter) - screwing length l) tolerance code indicates the number of letters (uppercase internal thread, external thread with lowercase letters), as 7H, 6g, etc., should be particularly noted, 7H, 6g and other representatives of thread tolerance, and H7, g6 tolerance on behalf of the cylinder code. 2) is screwed into a predetermined length shorter (represented by S), medium (represented by N), length (indicated by L) three. Under normal circumstances, no labeling is screwed length, the thread tolerance screwed by moderate length (N) is determined. When necessary, the length of the code may be screwed filling or S L, such as "M20-5g6g-L". When special needs, you can specify the length of the spin values together, such as "M20-5g6g-30". Common thread Ordinary coarse thread: Feature Code M + nominal diameter + rotation + thread tolerance code (diameter, top diameter) - screwing length Common fine thread: Feature Code M + pitch + * nominal diameter screw thread tolerance to + code (diameter, top diameter) - screwing length Note omitted right-hand thread, L with "LH" said. M 16-5g6g said coarse thread, nominal diameter 16, right-hand thread pitch diameter tolerance zone 5g, large diameter 6g, screwing length by medium length consideration. M16 × 1 LH-6G said fine tooth common thread, nominal diameter 16, pitch 1, L, thread tolerance in diameter, large diameter are 6G, screwing length by medium length consideration. Labeling pipe thread The format is: Feature Code (G said cylindrical pipe threads, tapered pipe threads expressed NPT) + size code + Code + rotation tolerance level G1A - LH said British non-thread sealing pipe thread, size code 1in, right-handed, tolerance class A level. Rcl / 2 inch thread sealing said taper pipe thread, size code 1/2in, right-handed.
Translated by Google
Screw type in English instructions
P is a finger-type is PAN head; A fingertips Beano, B refers to the iron steel teeth that per head beak Gangya PA, PB per head flat nose steel teeth. Tapping categories: ◆ Round self-tapping screws PA ◆ Round Hirao self-tapping screws PB ◆ Round cut tail self-tapping screws PT ◆ Round-mediated self-tapping screws with PWA ◆ Round with referral Hirao tapping PWB ◆ Round cut tail with referral tapping PWT ◆ countersunk head tapping screws KA ◆ countersunk head self-tapping screws KB Hirao ◆ countersunk head self-tapping screws cut tail KT ◆ countersunk head self tapping screws OA ◆ bulk of the self-tapping screws BA ◆ bulk Hirao BB self-tapping screws ◆ Large flat head self tapping screws TA ◆ Large flat head self-tapping screws TB Hirao ◆ Large flat head self-tapping screws TT tail cut ◆ thin head self tapping screws CA ◆ thin head self-tapping screws CB Hirao ◆ The Hexagon tapping HA Cup ◆ dry wall screws / drywall nail / staple fiber Machine silk ::: ◆ Round Head Machine Screw PM ◆ Round referral machine screw with PWM ◆ Large flat head machine screw TM ◆ countersunk head machine screw KM ◆ countersunk head machine screw OM ◆ Big Head Machine Screw BM ◆ thin head machine screw CM ◆ Cup head machine screws HM teeth
Translated by Google
Screw classification
螺丝分类
螺丝分类
螺丝分类
螺丝分类
螺丝分类
螺丝分类
螺丝分类
Major categories, including ordinary screws, self-tapping screws and expansion screws three. Cap screw cap screws fastening the past limited the whole tooth, but this is not the standard usage. Hex head screws Hex cap screw with hexagon bolts Hex bolt rotation as the name suggests is a hexagonal head of external thread fasteners designed to use a wrench. In accordance with ASME B18.2.1 standards, hex head screws (Hex cap screw) more general large hexagonal bolts (Hex bolt) head height and arm length tolerances, thus ASME B18.2.1 hex screws for installation of all hex bolts can be used in the place, but also contains a large hexagonal bolts are too large to use the place. Hexagon head screws Socket cap screw, also known as corn bread screws or bolts Allen (Allen bolt), is a hexagonal head screw hole, after a six-Square (hex key, Allen wrench or Allen key) is _insert_ed into the hole to tightening or loosening. The most commonly used socket head cap screw is a cylindrical head screws, 1.5 times (1960 series) head diameter approximately the diameter of the main thread, the other head type, including the surface appearance of the button head screw (Bottom head cap screw) and applied to the conical screw holes The flat head screws (Countersunk head cap screw). Sink hole design allows the screw head does not need to be fixed in the exposed surface of the object can also be rotated, so more use of the surface is small, inconvenient to use traditional wrench place. Machine Screw Machine screw diameter generally less than ¼-inch screws (4 # to 12 #), and usually by the screwdriver to turn the whole tooth, such as word slotted, Phillips or hex and so on. Network intention. Screw = LS = upstairs.
