Machine Design slide 12

Machine Design slide 12 - Week8,Lecture1 Screws,...

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ENGR 3220 – Machine Design ENGR 3220 – Machine Design Week 8, Lecture 1 Week 8, Lecture 1 Screws, Fasteners and Nonpermanent  Screws, Fasteners and Nonpermanent  Joints Design Joints Design
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Bolts and Nuts
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Bolts and Nuts + < + + = + + = 200 25 2 200 125 12 2 48 125 6 2 6 2 / 1 2 6 4 / 1 2 L D L D D L D L in L in D in L in D L T T For inch-series bolts For metric bolts The thread lengths of the bolts are given by:
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Cap Screws Typical cap-screw heads are shown on the left: (a) fillister head; (b) flat head; (c) hexagonal socket head
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Joints-Fastener Stiffness The purpose of the bolt is to clamp two or more parts together. Twisting the nut stretches the bolt to produce the clamping force. This force is called the pretension or bolt preload. It exists in the connection after the nut has been properly tightened no matter whether the external tensile load P is exerted or not
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A cap-screw are used fasten the cover part to the body. (shown in the left). Here
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This note was uploaded on 04/16/2011 for the course ENGR 3220 taught by Professor Turro during the Spring '11 term at UOIT.

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Machine Design slide 12 - Week8,Lecture1 Screws,...

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