Roll Form Tap Drill Size Chart

Hole sizes shown may not suit unj and mj hole requirements.

Roll form tap drill size chart.

Calculations are done according to roll form tap drill charts which are given in the machinery s handbook. Roll tapping is a process which forms a thread in the hole by displacement of the material into the desired size and pitch. Desired thread size and of full thread are input parameters for the calculator. Technical support threading tapping drill size for thread forming.

For dryseal straight pipe threads suggested drill sizes are as shown expect. Sizes given permit direct tapping without reaming the hole but only give a full thread for the first two or three threads. Tap size cut tap drill roll tap drill minor ø major ø. To establish tap drill sizes for inch size roll forming taps tap driil size basic tap 0 0.

Buying american made products benefits us all and makes the usa a stronger country. We are proudly american made for 119 years. Practical formula metric sizes to establish tap drill sizes for metric size roll forming taps tap driil size basic tap 0 0. 3 14 2009 7 03 16 pm.

Check with tap manufacturer for required drill size. Printable chart downloads at the bottom of the page. Sti roll tap drill sizes sti tap drill sizes and pipe tap drill sizes. We support the made in the usa movement.

20 practical formula metric sizes to establish tap drill sizes for metric size roll forming taps tap drill size basic tap o d. Form tap not available or not standard. Posted in decimal equivalent charts tool tips. We encourage all to build and buy american made.

0068 x of thread desired threads per inch example 1 4 20 tap with 65 thread 250 0068 x 65 228 dia. Buy american for a better america. To establish tap drill sizes for inch size roll forming taps tap drill size basic tap o d. Example 1 4 20 tap with 65 thread.

0068 x of thread desired threads per inch 068 x 250 228 dia. Tap size cutting taps forming taps and pitch drill size dec.