|
|
Line 42: |
Line 42: |
| *When threading a blind hole, the best way to clean out the chips is to use a ball inflater needle in a blow gun. You can make an adapter using a 1/8-NPT fitting (which is a close thread to a blow gun nozzle) to adapt the inflater to it. | | *When threading a blind hole, the best way to clean out the chips is to use a ball inflater needle in a blow gun. You can make an adapter using a 1/8-NPT fitting (which is a close thread to a blow gun nozzle) to adapt the inflater to it. |
| *To keep chips from falling into an engine when rethreading a spark plug hole, put axle/bearing grease on the tap. This will collect most if not all the metal chips from falling into the engine. | | *To keep chips from falling into an engine when rethreading a spark plug hole, put axle/bearing grease on the tap. This will collect most if not all the metal chips from falling into the engine. |
− |
| |
− | ===Tap drill size===
| |
− | <table border="0" cellpadding="0" cellspacing="0" width="640"><table border="0" cellpadding="3" cellspacing="1" width="100%">
| |
− |
| |
− |
| |
− | <tr align="center" bgcolor="ccccbb">
| |
− | <td colspan="5" valign="bottom"><b> </b></td>
| |
− | <td colspan="4" valign="bottom"><b>Clearance Hole Drills</b></td>
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="cccc99">
| |
− | <td colspan="2" valign="bottom"><b>Size of Screw</b></td>
| |
− | <td valign="bottom"><b> </b></td>
| |
− | <td colspan="2" valign="bottom"><b>Tap Drill</b></td>
| |
− |
| |
− | <td colspan="2" valign="bottom"><b>Close Fit</b></td>
| |
− | <td colspan="2" valign="bottom"><b>Free Fit</b></td>
| |
− |
| |
− | </tr><tr align="center" bgcolor="cccc66">
| |
− | <td valign="bottom"><b>No. or Dia.</b></td>
| |
− | <td valign="bottom"><b>Decimal (inch)</b></td>
| |
− | <td valign="bottom"><b>Threads Per Inch</b></td>
| |
− | <td valign="bottom"><b>Drill Size</b></td>
| |
− | <td valign="bottom"><b>Decimal (inch)</b></td>
| |
− | <td valign="bottom"><b>Drill Size</b></td>
| |
− | <td valign="bottom"><b>Decimal (inch)</b></td>
| |
− | <td valign="bottom"><b>Drill Size</b></td>
| |
− | <td valign="bottom"><b>Decimal (inch)</b></td>
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >#0</td>
| |
− | <td >0.06</td>
| |
− | <td >80</td>
| |
− | <td >3/64</td>
| |
− | <td >0.0469</td>
| |
− | <td >52</td>
| |
− | <td >0.0635</td>
| |
− | <td >50</td>
| |
− | <td >0.07</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >#1</td>
| |
− | <td >0.073</td>
| |
− | <td >64</td>
| |
− | <td >53</td>
| |
− | <td >0.0595</td>
| |
− | <td >48</td>
| |
− | <td >0.076</td>
| |
− | <td >46</td>
| |
− | <td >0.081</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >#1</td>
| |
− | <td >0.073</td>
| |
− | <td >72</td>
| |
− | <td >53</td>
| |
− | <td >0.0595</td>
| |
− | <td >48</td>
| |
− | <td >0.076</td>
| |
− | <td >46</td>
| |
− | <td >0.081</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >#2</td>
| |
− | <td >0.086</td>
| |
− | <td >56</td>
| |
− | <td >50</td>
| |
− | <td >0.07</td>
| |
− | <td >43</td>
| |
− | <td >0.089</td>
| |
− | <td >41</td>
| |
− | <td >0.096</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >#2</td>
| |
− | <td >0.086</td>
| |
− | <td >64</td>
| |
− | <td >50</td>
| |
− | <td >0.07</td>
| |
− | <td >43</td>
| |
− | <td >0.089</td>
| |
− | <td >41</td>
| |
− | <td >0.096</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >#3</td>
| |
− | <td >0.099</td>
| |
− | <td >48</td>
| |
− | <td >47</td>
| |
− | <td >0.0785</td>
| |
− | <td >37</td>
| |
− | <td >0.104</td>
| |
− | <td >35</td>
| |
− | <td >0.11</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >#3</td>
| |
− | <td >0.099</td>
| |
− | <td >56</td>
| |
− | <td >45</td>
| |
− | <td >0.082</td>
| |
− | <td >37</td>
| |
− | <td >0.104</td>
| |
− | <td >35</td>
| |
− | <td >0.11</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >#4</td>
| |
− | <td >0.112</td>
| |
− | <td >36</td>
| |
− | <td >44</td>
| |
− | <td >0.086</td>
| |
− | <td >32</td>
| |
− | <td >0.116</td>
| |
− | <td >30</td>
| |
− | <td >0.1285</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >#4</td>
| |
− | <td >0.112</td>
| |
− | <td >40</td>
| |
− | <td >43</td>
| |
− | <td >0.089</td>
| |
− | <td >32</td>
| |
− | <td >0.116</td>
| |
− | <td >30</td>
| |
− | <td >0.1285</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >#4</td>
| |
− | <td >0.112</td>
| |
− | <td >48</td>
| |
− | <td >42</td>
| |
− | <td >0.0935</td>
| |
− | <td >32</td>
| |
− | <td >0.116</td>
| |
− | <td >30</td>
| |
− | <td >0.1285</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >#5</td>
| |
− | <td >0.125</td>
| |
− | <td >40</td>
| |
− | <td >38</td>
| |
− | <td >0.1015</td>
| |
− | <td >30</td>
| |
− | <td >0.1285</td>
| |
− | <td >29</td>
| |
− | <td >0.136</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >#5</td>
| |
− | <td >0.125</td>
| |
− | <td >44</td>
| |
− | <td >37</td>
| |
− | <td >0.104</td>
| |
− | <td >30</td>
| |
− | <td >0.1285</td>
| |
− | <td >29</td>
| |
− | <td >0.136</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >#6</td>
| |
− | <td >0.138</td>
| |
− | <td >32</td>
| |
− | <td >36</td>
| |
− | <td >0.1065</td>
| |
− | <td >27</td>
| |
− | <td >0.144</td>
| |
− | <td >25</td>
| |
− | <td >0.1495</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >#6</td>
| |
− | <td >0.138</td>
| |
− | <td >40</td>
| |
− | <td >33</td>
| |
− | <td >0.113</td>
| |
− | <td >27</td>
| |
− | <td >0.144</td>
| |
− | <td >25</td>
| |
− | <td >0.1495</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >#8</td>
| |
− | <td >0.164</td>
| |
− | <td >32</td>
| |
− | <td >29</td>
| |
− | <td >0.136</td>
| |
− | <td >18</td>
| |
− | <td >0.1695</td>
| |
− | <td >16</td>
| |
− | <td >0.177</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >#8</td>
| |
− | <td >0.164</td>
| |
− | <td >36</td>
| |
− | <td >29</td>
| |
− | <td >0.136</td>
| |
− | <td >18</td>
| |
− | <td >0.1695</td>
| |
− | <td >16</td>
| |
− | <td >0.177</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >#10</td>
| |
− | <td >0.19</td>
| |
− | <td >24</td>
| |
− | <td >25</td>
| |
− | <td >0.1495</td>
| |
− | <td >9</td>
| |
− | <td >0.196</td>
| |
− | <td >7</td>
| |
− | <td >0.201</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >#10</td>
| |
− | <td >0.19</td>
| |
− | <td >32</td>
| |
− | <td >21</td>
| |
− | <td >0.159</td>
| |
− | <td >9</td>
| |
− | <td >0.196</td>
| |
− | <td >7</td>
| |
− | <td >0.201</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >#12</td>
| |
− | <td >0.216</td>
| |
− | <td >24</td>
| |
− | <td >16</td>
| |
− | <td >0.177</td>
| |
− | <td >2</td>
| |
− | <td >0.221</td>
| |
− | <td >I</td>
| |
− | <td >0.228</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >#12</td>
| |
− | <td >0.216</td>
| |
− | <td >28</td>
| |
− | <td >14</td>
| |
− | <td >0.182</td>
| |
− | <td >2</td>
| |
− | <td >0.221</td>
| |
− | <td >I</td>
| |
− | <td >0.228</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >#14</td>
| |
− | <td >0.242</td>
| |
− | <td >20</td>
| |
− | <td >10</td>
| |
− | <td >0.1935</td>
| |
− | <td >D</td>
| |
− | <td >0.246</td>
| |
− | <td >F</td>
| |
− | <td >0.257</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >#14</td>
| |
− | <td >0.242</td>
| |
− | <td >24</td>
| |
− | <td >7</td>
| |
− | <td >0.201</td>
| |
− | <td >D</td>
| |
− | <td >0.246</td>
| |
− | <td >F</td>
| |
− | <td >0.257</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >1/4</td>
| |
− | <td >0.25</td>
| |
− | <td >20</td>
| |
− | <td >7</td>
| |
− | <td >0.201</td>
| |
− | <td >F</td>
| |
− | <td >0.257</td>
| |
− | <td >H</td>
| |
− | <td >0.266</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >1/4</td>
| |
− | <td >0.25</td>
| |
− | <td >28</td>
| |
− | <td >3</td>
| |
− | <td >0.213</td>
| |
− | <td >F</td>
| |
− | <td >0.257</td>
| |
− | <td >H</td>
| |
− | <td >0.266</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >5/16</td>
| |
− | <td >0.3125</td>
| |
− | <td >18</td>
| |
− | <td >F</td>
| |
− | <td >0.257</td>
| |
− | <td >P</td>
| |
− | <td >0.323</td>
| |
− | <td >Q</td>
| |
− | <td >0.332</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >5/16</td>
| |
− | <td >0.3125</td>
| |
− | <td >24</td>
| |
− | <td >I</td>
| |
− | <td >0.272</td>
| |
− | <td >P</td>
| |
− | <td >0.323</td>
| |
− | <td >Q</td>
| |
− | <td >0.332</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >3/8</td>
| |
− | <td >0.375</td>
| |
− | <td >16</td>
| |
− | <td >5/16</td>
| |
− | <td >0.3125</td>
| |
− | <td >W</td>
| |
− | <td >0.386</td>
| |
− | <td >X</td>
| |
− | <td >0.397</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >3/8</td>
| |
− | <td >0.375</td>
| |
− | <td >24</td>
| |
− | <td >Q</td>
| |
− | <td >0.332</td>
| |
− | <td >W</td>
| |
− | <td >0.386</td>
| |
− | <td >X</td>
| |
− | <td >0.397</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >7/16</td>
| |
− | <td >0.4375</td>
| |
− | <td >14</td>
| |
− | <td >U</td>
| |
− | <td >0.368</td>
| |
− | <td >29/64</td>
| |
− | <td >0.4531</td>
| |
− | <td >15/32</td>
| |
− | <td >0.4687</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >7/16</td>
| |
− | <td >0.4375</td>
| |
− | <td >20</td>
| |
− | <td >25/64</td>
| |
− | <td >0.3906</td>
| |
− | <td >29/64</td>
| |
− | <td >0.4531</td>
| |
− | <td >15/32</td>
| |
− | <td >0.4687</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeee0">
| |
− | <td >1/2</td>
| |
− | <td >0.5</td>
| |
− | <td >13</td>
| |
− | <td >27/64</td>
| |
− | <td >0.4219</td>
| |
− | <td >33/64</td>
| |
− | <td >0.5156</td>
| |
− | <td >17/32</td>
| |
− | <td >0.5312</td>
| |
− |
| |
− | </tr>
| |
− |
| |
− | <tr align="center" bgcolor="eeeeee">
| |
− | <td >1/2</td>
| |
− | <td >0.5</td>
| |
− | <td >20</td>
| |
− | <td >29/64</td>
| |
− | <td >0.4531</td>
| |
− | <td >33/64</td>
| |
− | <td >0.5156</td>
| |
− | <td >17/32</td>
| |
− | <td >0.5312</td>
| |
− | </tr> </table>
| |
− |
| |
− |
| |
− | To determine the ideal drill size for approximately 75% thread on inch-sized (imperial) special pitch taps, use the following formula:
| |
− |
| |
− | '''Drill size''' = (Major Diameter of the tap) minus (.975 divided by the number of Threads Per Inch)
| |
− |
| |
− | For example, to find the ideal drill size needed for a 1/4-32 tap:
| |
− |
| |
− | Drill size = (1/4") - (.975 / 32 tpi)
| |
− | Drill size = 0.250" - (.975 / 32)
| |
− | Drill size = 0.250" - 0.0305"
| |
− | Drill size = 0.2195"
| |
− |
| |
− | Using a decimal chart to find the closest available drill sizes to our calculated ideal drill size of 0.2195", we'd select either a 7/32" or #2 drill size.
| |
− |
| |
− | To determine the proper drill size for a '''metric''' tap, subtract the tap pitch from the tap diameter. For example: a 42mm x 1.5 tap uses a 40.5mm drill (42 minus 1.5 = 40.5).
| |
| | | |
| ==Torquing fasteners== | | ==Torquing fasteners== |
Line 2,500: |
Line 2,040: |
| <br> | | <br> |
| | | |
| + | {{develop1}} |
| [[Category:Fasteners]] | | [[Category:Fasteners]] |
| [[Category:Engine]] | | [[Category:Engine]] |
| [[Category:General hotrodding]] | | [[Category:General hotrodding]] |
| [[Category:Garage and shop]] | | [[Category:Garage and shop]] |