Jet Drilling

[skatermike24]

Does anyone have a drill bit size chart for rejetting, thanks

[captcarb]

A set of 60 through 80 drills is pretty reasonable and they have the decimal sizes listed on them.

jim

[captcarb]

Drill Bit Conversion Table

<table cellspacing="25"> <tbody> <tr> <td> <table cellspacing="3"> <tbody> <tr align="center"> <td>gauge</td> <td>inches</td> <td>mm</td></tr> <tr align="center"> <td>80</td> <td>0.014</td> <td>0.343</td></tr> <tr align="center"> <td>79</td> <td>0.015</td> <td>0.368</td></tr> <tr align="center"> <td>78</td> <td>0.016</td> <td>0.406</td></tr> <tr align="center"> <td>77</td> <td>0.018</td> <td>0.457</td></tr> <tr align="center"> <td>76</td> <td>0.020</td> <td>0.508</td></tr> <tr align="center"> <td>75</td> <td>0.021</td> <td>0.533</td></tr> <tr align="center"> <td>74</td> <td>0.023</td> <td>0.572</td></tr> <tr align="center"> <td>73</td> <td>0.024</td> <td>0.610</td></tr> <tr align="center"> <td>72</td> <td>0.025</td> <td>0.635</td></tr> <tr align="center"> <td>71</td> <td>0.026</td> <td>0.660</td></tr> <tr align="center"> <td>70</td> <td>0.028</td> <td>0.711</td></tr> <tr align="center"> <td>69</td> <td>0.029</td> <td>0.742</td></tr> <tr align="center"> <td>68</td> <td>0.031</td> <td>0.787</td></tr> <tr align="center"> <td>67</td> <td>0.032</td> <td>0.813</td></tr> <tr align="center"> <td>66</td> <td>0.033</td> <td>0.838</td></tr> <tr align="center"> <td>65</td> <td>0.035</td> <td>0.889</td></tr> <tr align="center"> <td>64</td> <td>0.036</td> <td>0.914</td></tr> <tr align="center"> <td>63</td> <td>0.037</td> <td>0.940</td></tr> <tr align="center"> <td>62</td> <td>0.038</td> <td>0.965</td></tr> <tr align="center"> <td>61</td> <td>0.039</td> <td>0.991</td></tr> <tr align="center"> <td>60</td> <td>0.040</td> <td>1.016</td></tr> <tr align="center"> <td>59</td> <td>0.041</td> <td>1.041</td></tr> <tr align="center"> <td>58</td> <td>0.042</td> <td>1.067</td></tr> <tr align="center"> <td>57</td> <td>0.043</td> <td>1.092</td></tr> <tr align="center"> <td>56</td> <td>0.046</td> <td>1.181</td></tr> <tr align="center"> <td>55</td> <td>0.052</td> <td>1.321</td></tr> <tr align="center"> <td>54</td> <td>0.055</td> <td>1.397</td></tr></tbody></table></td> <td> <table cellspacing="3"> <tbody> <tr align="center"> <td>gauge</td> <td>inches</td> <td>mm</td></tr> <tr align="center"> <td>53</td> <td>0.059</td> <td>1.511</td></tr> <tr align="center"> <td>52</td> <td>0.064</td> <td>1.613</td></tr> <tr align="center"> <td>51</td> <td>0.067</td> <td>1.702</td></tr> <tr align="center"> <td>50</td> <td>0.070</td> <td>1.778</td></tr> <tr align="center"> <td>49</td> <td>0.073</td> <td>1.854</td></tr> <tr align="center"> <td>48</td> <td>0.076</td> <td>1.930</td></tr> <tr align="center"> <td>47</td> <td>0.079</td> <td>1.994</td></tr> <tr align="center"> <td>46</td> <td>0.081</td> <td>2.057</td></tr> <tr align="center"> <td>45</td> <td>0.082</td> <td>2.083</td></tr> <tr align="center"> <td>44</td> <td>0.086</td> <td>2.184</td></tr> <tr align="center"> <td>43</td> <td>0.089</td> <td>2.261</td></tr> <tr align="center"> <td>42</td> <td>0.094</td> <td>2.375</td></tr> <tr align="center"> <td>41</td> <td>0.096</td> <td>2.438</td></tr> <tr align="center"> <td>40</td> <td>0.098</td> <td>2.489</td></tr> <tr align="center"> <td>39</td> <td>0.099</td> <td>2.527</td></tr> <tr align="center"> <td>38</td> <td>0.101</td> <td>2.578</td></tr> <tr align="center"> <td>37</td> <td>0.104</td> <td>2.642</td></tr> <tr align="center"> <td>36</td> <td>0.106</td> <td>2.705</td></tr> <tr align="center"> <td>35</td> <td>0.110</td> <td>2.794</td></tr> <tr align="center"> <td>34</td> <td>0.111</td> <td>2.819</td></tr> <tr align="center"> <td>33</td> <td>0.113</td> <td>2.870</td></tr> <tr align="center"> <td>32</td> <td>0.116</td> <td>2.946</td></tr> <tr align="center"> <td>31</td> <td>0.120</td> <td>3.048</td></tr> <tr align="center"> <td>30</td> <td>0.129</td> <td>3.264</td></tr> <tr align="center"> <td>29</td> <td>0.136</td> <td>3.454</td></tr> <tr align="center"> <td>28</td> <td>0.141</td> <td>3.569</td></tr> <tr align="center"> <td>27</td> <td>0.144</td> <td>3.658</td></tr></tbody></table></td> <td> <table cellspacing="3"> <tbody> <tr align="center"> <td>gauge</td> <td>inches</td> <td>mm</td></tr> <tr align="center"> <td>26</td> <td>0.147</td> <td>3.734</td></tr> <tr align="center"> <td>25</td> <td>0.149</td> <td>3.797</td></tr> <tr align="center"> <td>24</td> <td>0.152</td> <td>3.861</td></tr> <tr align="center"> <td>23</td> <td>0.154</td> <td>3.912</td></tr> <tr align="center"> <td>22</td> <td>0.157</td> <td>3.988</td></tr> <tr align="center"> <td>21</td> <td>0.159</td> <td>4.039</td></tr> <tr align="center"> <td>20</td> <td>0.161</td> <td>4.089</td></tr> <tr align="center"> <td>19</td> <td>0.166</td> <td>4.216</td></tr> <tr align="center"> <td>18</td> <td>0.169</td> <td>4.305</td></tr> <tr align="center"> <td>17</td> <td>0.173</td> <td>4.394</td></tr> <tr align="center"> <td>16</td> <td>0.177</td> <td>4.496</td></tr> <tr align="center"> <td>15</td> <td>0.180</td> <td>4.572</td></tr> <tr align="center"> <td>14</td> <td>0.182</td> <td>4.623</td></tr> <tr align="center"> <td>13</td> <td>0.185</td> <td>4.699</td></tr> <tr align="center"> <td>12</td> <td>0.189</td> <td>4.801</td></tr> <tr align="center"> <td>11</td> <td>0.191</td> <td>4.851</td></tr> <tr align="center"> <td>10</td> <td>0.194</td> <td>4.915</td></tr> <tr align="center"> <td>9</td> <td>0.196</td> <td>4.978</td></tr> <tr align="center"> <td>8</td> <td>0.199</td> <td>5.055</td></tr> <tr align="center"> <td>7</td> <td>0.201</td> <td>5.105</td></tr> <tr align="center"> <td>6</td> <td>0.204</td> <td>5.182</td></tr> <tr align="center"> <td>5</td> <td>0.206</td> <td>5.220</td></tr> <tr align="center"> <td>4</td> <td>0.209</td> <td>5.309</td></tr> <tr align="center"> <td>3</td> <td>0.213</td> <td>5.410</td></tr> <tr align="center"> <td>2</td> <td>0.221</td> <td>5.613</td></tr> <tr align="center"> <td>1</td> <td>0.228</td> <td>5.791</td></tr> <tr align="center"> <td>-</td> <td>-</td> <td>-</td></tr></tbody></table></td> <td> <table cellspacing="3"> <tbody> <tr align="center"> <td>gauge</td> <td>inches</td> <td>mm</td></tr> <tr align="center"> <td>A</td> <td>0.234</td> <td>5.944</td></tr> <tr align="center"> <td>B</td> <td>0.238</td> <td>6.045</td></tr> <tr align="center"> <td>C</td> <td>0.242</td> <td>6.147</td></tr> <tr align="center"> <td>D</td> <td>0.246</td> <td>6.248</td></tr> <tr align="center"> <td>E</td> <td>0.250</td> <td>6.350</td></tr> <tr align="center"> <td>F</td> <td>0.257</td> <td>6.528</td></tr> <tr align="center"> <td>G</td> <td>0.261</td> <td>6.629</td></tr> <tr align="center"> <td>H</td> <td>0.266</td> <td>6.756</td></tr> <tr align="center"> <td>I</td> <td>0.272</td> <td>6.909</td></tr> <tr align="center"> <td>J</td> <td>0.277</td> <td>7.036</td></tr> <tr align="center"> <td>K</td> <td>0.281</td> <td>7.137</td></tr> <tr align="center"> <td>L</td> <td>0.290</td> <td>7.366</td></tr> <tr align="center"> <td>M</td> <td>0.295</td> <td>7.493</td></tr> <tr align="center"> <td>N</td> <td>0.302</td> <td>7.671</td></tr> <tr align="center"> <td>O</td> <td>0.316</td> <td>8.026</td></tr> <tr align="center"> <td>P</td> <td>0.323</td> <td>8.204</td></tr> <tr align="center"> <td>Q</td> <td>0.332</td> <td>8.433</td></tr> <tr align="center"> <td>R</td> <td>0.339</td> <td>8.611</td></tr> <tr align="center"> <td>S</td> <td>0.348</td> <td>8.839</td></tr> <tr align="center"> <td>T</td> <td>0.358</td> <td>9.093</td></tr> <tr align="center"> <td>U</td> <td>0.368</td> <td>9.347</td></tr> <tr align="center"> <td>V</td> <td>0.377</td> <td>9.576</td></tr> <tr align="center"> <td>W</td> <td>0.386</td> <td>9.804</td></tr> <tr align="center"> <td>X</td> <td>0.397</td> <td>10.08</td></tr> <tr align="center"> <td>Y</td> <td>0.404</td> <td>10.26</td></tr> <tr align="center"> <td>Z</td> <td>0.413</td> <td>10.49</td></tr> <tr align="center"> <td>-</td> <td>-</td> <td>-</td></tr></tbody></table></td></tr></tbody></table>

[mackeral5]

a pair of digital calipers is a nice addition to your jet drilling kit. once you mix up a couple of bits it's virtually impossible to tell them apart without measuring them.

[T-REX]

yEA, AND IT'Z EVEN HARDER KEEP'IN UP WIT DEM DAMM DRILL'D JETZ......NO MATTA HOW CLOSE YA KEEP AN EYE ON THEM!!....I drill'em all tha time, and keep them on a board thats mark'd, but always seems like I'm second guess'in myself whether I have them in tha rite place.....U have no ideer howmany times I have check'd and recheck'd them damm jets.......U kan bet yo sweet azz one thang, if'in I had tha money ta buy new jets, this ole fart would NEVER drill anuther one!!:D :D

[jphii]

You ain't kiddin Rex. If you don't put them in a zip lock baggie they get all mixed up. Learned that lesson the hard way!

[mackeral5]

even with zip locks I can't keep up with them......I guess I just ain't smart enough to putt em in the right baggie. never seems to work for me. my mig welder tip cleaner gets a lot of use in checking jet sizes, then checking again, and again.....

[jphii]

Yea, me too. I've tried them little pill holders, tackle cases with all the little compartments, all kinds of stuff. I can keep up with the mains pretty good, but them damn air bleeds drive me crazy.

[T-REX]

but them damn air bleeds drive me crazy.


YEA RITE!!!....Blame dat on tha jet'z....:eek: :D .........It'z alabama womenz:D

[Zonkercraft]

You ain't kiddin Rex. If you don't put them in a zip lock baggie they get all mixed up. Learned that lesson the hard way!

Yeah...and make sure you wear your glasses when you try to read 'em. If you don't....well...you end up with BIG HOLES!

Zonkercraft

[RONNIE]

it's not the glasses it's all that shine makin him blind!!

[steve]

Since its VERY difficult to get the flow exactly the same when you drill jets, you might want to check into these reamer sets when they get them back in stock. They also have Go/ No Go gauges.

http://www.cbperformance.com/catalog.asp?ProductID=525

[moparbarn]

i will either files notches on the outside to identify drilled jets, or use a tool marker/etcher to write the new size on them (if room allows). you can also solder them back up & redrill, if that last mod was TOO MUCH. i say redrill, i drill small, and use the reamers mentioned to finish with. drilling does not make matched sets. reaming is better, imho.

[skatermike24]

Thanks guys