TAILIEUCHUNG - Machinery's Handbook 2th Episode 3 Part 8

Tham khảo tài liệu 'machinery's handbook 2th episode 3 part 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Machinery s Handbook 27th Edition Table 1c. Formulas for Caluclating Dimensions of Helical Gears Tooth Form and Pressure Angle Normal Diametral Pitch PN Diametral Pitch P Outside Diameter of Blank O Pitch Diameter D Cosine of Helix Angle A Addendum Dedendum Whole Depth American Standard 1412- and 20-degree full depth N 2 cosA O X cosA or P cosA PNcosA or N 2 cosA O N 2 cosA Pn cosA or N 2 cosA P N Pn cosA or N P o 7 s 1 KJ 1 PN or cos A P PN or cos A P PN or cosA P American Standard 20-degree stub N 1 O X cosA or P cosA Pn cosA or N O N cosA - Pn cosA or N cosA P N Pn cosA or N P P pN or O . PN or cosA P 1 PN or cosA P PN or cosA P Fellows 20-degree stub --- - 2 PN NcosA -PN D N Pn n cosA N . - 2 -1 -Pt 1 PN D Pn d Pn normal diametral pitch normal diametral pitch of cutter or hob used to cut teeth P diametral pitch O outside diameter of blank D pitch diameter A helix angle N number of teeth Pn n normal diametral pitch in numerator of stub-tooth designation which determines thickness of tooth and number of teeth Pd D normal diametral pitch in denominator of stub-tooth designation which determines the addendum dedendum and whole depth REPLACEMENT GEAR CALCULATIONS 2155 Copyright 2004 Industrial Press Inc. New York NY 2156 Machinery s Handbook 27th Edition INVOLUTE SPLINES SPLINES AND SERRATIONS A splined shaft is one having a series of parallel keys formed integrally with the shaft and mating with corresponding grooves cut in a hub or fitting this arrangement is in contrast to a shaft having a series of keys or feathers fitted into slots cut into the shaft. The latter construction weakens the shaft to a considerable degree because of the slots cut into it and consequently reduces its torque-transmitting capacity. Splined shafts are most generally used in three types of applications 1 for coupling shafts when relatively heavy torques are to be transmitted without slippage 2 for .

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