Каталог TooTool техническая информация 1 - страница 141

Technical Information for Threading A\ Common Thread Forms Special Features External Thread > External Major Diameter Common Thread Forms A thread on the external Thread The largest diameter of a screw thread surface of a cylinder screw or cone ISO M (Metric) and UN (Unified National) UNJ (controlled root radius) Whitworth (BSW) Pitch Diameter p — 0,1062 p - p - 0,1082 P p — 0,1601 P0,125 P\0.125 PI0,1373 PX1\A0,0722 P|0,8660 P0,6134 P0,8660 P60°r60“screv/0, 25 P^|*0,2706 P^^0,1443 P0,1443 P0,1804 P,0,5774 F0,9605 PTT0,0902 P^0,1373 P0,1804 P55“0,6403 P0,1601 PUse: Fittings and pipe couplings for gas, water,Use: All branches of mechanical industry.Use: Aircraft and space industry.and sewer lines (replaced by ISO).Major ®On a straight thread, the diameter of anuPitch ffiimaginary cylinder, the surface of which cuts the••Minor ®Pitch*Thread—Minor DiameterAAngle_A HelixThe smallest diameter of a screw threadPitch_The distance between the corresponding pointsCrest~on adjacent thread forms measured parallel tothe axis. This distance can be defined inmillimeters or by the tpi (threads per inch), whichis the reciprocal of the pitchfAngleHelix AngleFor a straight thread, where the lead of the threadand the pitch diameter circle circumference forma right angled triangle, the helix angle is the angleopposite of the lead Straight Thread American Buttress NPT (American National Pipe Thread) BSPT (British Standard Pipe Thread) Nominal Diameter Athread formed on a cylinder 1/2 D play. .I, p.0,1632 P| 0,0627 P p0,038 P 0,0328 P p 0,1600 P The diameter of which the diameter limits derived by the application of deviation allowances and tolerances are Athread on the Internal Thread internal surface of a cylinder or cone TaperThreadAthread formed on a cone f0,8906 P I°| l3 P Hi * Sr L rrt 0,8657 P 0,8 Pfiy0,3 P* 0,0826 P7“45“1/2 D, play0,1632 P1/2 D2 play^60“axis of ^screw "taper 1:160,0328 P0,9602 P0,6403 P55“T0,1373 P/axis of screw ^9 "taper 1:160,1600 PLeft handed thread Right handed thread The Helix Angle( j) )Helix angle(!) Lead(L) Use: Fittings and pipe couplings. Use: Fittings and pipe couplings. Use: Pipe thread for steam, gas, and water lines ( j) X Pitch diamiter(D) TR DIN 103 Acme Acme, truncated (Stub) p nut p 77 * *0,6830 P 1 1/2 D play A A 10,7167 p 1/2 D playI1,8660 P0,5 P30“*0,6830 P1,9334 P+AA0,5 P129“,0,7167 PA'11,9334 P29' A thread which, when viewed axially,winds in a counter clockwise andreceding direction. All left handedthreads are designated LHA thread which, when viewed axially, windsin a clockwise and receding directionThreads are always right handedunless they are specifiedFor a straight thread, where the lead of the thread and thepitch diameter circle circumference form a right angledtriangle, the helix angle is the angle opposite of the leadMachining a Multi-start ThreadA thread in which the lead is an integral multiple, greater than one, of the pitch, A multi-start thread permits a more rapid advance without a coarser (larger) thread form V A rP -3 5A 0,25-6 120,51>,102mmmmscrewI /2 D 1 pla> y 1/2 D 2 play c 0,8167 P1/2pla First Start Machined Second Start Machined Third Start Machined (Final, 3 Starts Thread) A = 0,0307 P A = 0,4224 P B = 0,3707 P—x D play B = 0,4224 P—x D play C = 0,3707 P—(D1 play—D2 play) C = 0,4224 P—(D1 play—D2 play) Use: Mechanical industry for motion transmission Use: Acme-General is used in mechanical industry screws. for motion transmission screws. Use: Where normal Acme is too deep. API Rotary Shoulder Connection API Casing and Tubing Round Thread Form API Buttress Insert Profile Style B(NF0 B(ER) Sm Partial Profile Full Profile Full Profile for Fine Pitches Semi Full H rtn F 1