Changes

<table class="twocolortable" border="1" cellspacing="0" style="border-collapse:collapse"><tr><td><p class="s13">Characteristics</p></td><td><p class="s13">Form A Form B Form C</p><p class="s13">Rounded headf Trapeziodal Trapeziodal head, radiused head,flat</p></td><td><p class="s13">Suggested test equipment</p></td></tr><tr><td><p class="s13">a) Head diameter d₁ [mm]</p></td><td><p class="s13">d<span class="s14">₁</span><u>&lt;</u> 4 + 0,06 During optical measurement</p><p class="s13">d<span class="s14">₁</span>&gt; 4 - 0,06 disregard corner</p><p class="s13">radius R<span class="s14">₃</span></p></td><td><p class="s13">Comparator,</p><p class="s13">Measuring microscope</p></td></tr><tr><td><p class="s13">b) Head thickness</p><p class="s13">k [mm]</p></td><td><p class="s13">d<span class="s14">₁</span><u>&lt;</u> 4 + 0,03</p><p class="s13">d<span class="s14">₁</span>&gt; 4 + 0,08</p></td><td><p class="s13">Micrometer, Dial indicator</p></td></tr><tr><td><p class="s13">c) Shank diameter d<span class="s14">₂</span> [mm]</p></td><td><p class="s13">d<span class="s14">₂</span><u>&lt;</u> 2 - 0,06</p><p class="s13">d<span class="s14">₂</span>&gt; 2 - 0,08</p></td><td><p class="s13">Micrometer</p></td></tr><tr><td><p class="s13">d) Shank length [mm]</p></td><td><p class="s13">+ 0,15</p></td><td><p class="s13">Micrometer, Dial</p><p class="s13">indicator, Comparator</p></td></tr><tr><td><p class="s13">e) Radius at center</p><p class="s13">of contact surface</p><p class="s13">R<span class="s14">₁</span> [mm]</p></td><td><p class="s13">Form A und B: Within the head thickness</p><p class="s13">tolerance</p><p class="s13">Form C: Allowable deviation from flatness: convex: within head thickness tolerance</p><p class="s13">concave: 0.005 d<span class="s14">₁</span></p></td><td><p class="s13">Comparator,</p><p class="s13">Comparator template, Radius gage</p></td></tr><tr><td><p class="s13">f) Radius at edge of contact surface R<span class="s14">₂</span> [mm]</p></td><td><p class="s13">Form A: Smooth transition to R<span class="s14">₁</span></p><p class="s13">Form B: 1.5 R<span class="s14">₂</span> allowed</p><p class="s13">Form C: <u>&lt;</u>0,1d<span class="s14">₁</span></p></td><td><p class="s13">Profile template,</p><p class="s13">Comparator, Radius gage</p></td></tr><tr><td><p class="s13">g) Radii</p><p class="s13">R<span class="s14">₃</span>and R<span class="s14">₅</span> [mm]</p></td><td><p class="s13">Sligth rounding allowed</p></td><td><p class="s13">Comparator</p></td></tr><tr><td><p class="s13">h) Transition radius head underside to shank R<span class="s14">₄</span> [mm]</p></td><td><p class="s13">d<span class="s14">₂ </span><u>&lt;</u> 2 R<span class="s14">₄ </span><u>&lt;</u> 0,08 if covered by DIN 46240 pg.1 d<span class="s14">₂ </span>&gt; 2 R<span class="s14">₄ </span><u>&lt;</u> 0,1</p><p class="s13">d<span class="s14">₂ </span>&gt; 3 R<span class="s14">₄ </span><u>&lt;</u> 0,2</p></td><td><p class="s13">Comparator if in doubt: microsection</p></td></tr><tr><td><p class="s13">i) Allowed deviation</p><p class="s13">from cylindrical shape</p></td><td><p class="s13">max. 7° 30’: or d<span class="s14">₂ </span> <u>&lt;</u> l, l <u>&gt;</u> 0,7 mm and k <u>&lt;</u> 0,6 d<span class="s14">₁</span>.</p><p class="s13">max. 15°: for all other rivets</p></td><td><p class="s13">Comparator</p></td></tr><tr><td><p class="s13">k) Concentricity between head and shank center line [mm]</p></td><td><p class="s13">d<span class="s14">₁ </span><u>&lt;</u> 4 0,15</p><p class="s13">d<span class="s14">₁ </span>&gt; 4 0,2</p><p class="s13">in general: approx. 70% of allowable deviation</p><p class="s13">per DIN 46240</p></td><td><p class="s13">Comparator, Special</p><p class="s13">turn fixture</p></td></tr></table>