You can run these in a standard holder and these will improve tap life. This is available in Spiral Flute and Spiral Point Cut Taps as well as Form Taps with more Lobes to reduce Tool Pressure. A Powerdered Metal Substrate for better wear resistance and toughness.Better Chip Control (won't wrap around the tap).More Back Relief to Lower Tool Pressure.

A H7 Shank for better Runout compared to a H9 Shank of other taps.

For Example on a 1/4-20 Tap in 304 Stainless a Cut Tap is Listed at 25 SFM, you want to run a Form Tap at 37-50 SFM:Īre you tapping a lot of holes and looking to cut Cycle Time or Improve Tap Life a Synchro Tap is the way to go! A Synchro Tap has: For a Form Tap you want to run it at 50% to 100% Faster SFM than a Cut Tap. Here are Starting Speeds and Feeds for a Cut Tap. To figure out IPM use the Formula RPM*IPR=IPM The Feed Rate is the Tap Pitch so for 1/4-20 it is. To figure out RPM use the Formula:įor Example on a 1/4'-20 Tap in 304 Stainless at 25 SFM: 225' Tap Drill DiameterĦmm Tap Diameter - 0.5mm (1mm Tap Pitch / 2 = 0.5mm) = 5.5mm (.2165') Tap Drill DiameterĬlick Here for Tap Drill Sizes for All Inch/Metric Cut & Form Taps Based on % of ThreadĬlick here for a Standard Tap Drill Size Chart (UN, Metric, Pipe & STI)īelow are starting speeds for a Cut Taps in SFM as well as a conversion table for UN Taps. Tap Diameter - (Tap Pitch Divided by 2) = Tap Drill Size 200' Tap Drill DiameterĦmm Tap Diameter - 1mm Tap Pitch = 5mm (.1969') Tap Drill Diameter Tap Diameter - Tap Pitch = Tap Drill Size

Below is everything you need to know technically when tapping! Below is Tap Drill Size Recommendations, Tapping Speeds and Feeds, Synchro Tapping Info as well as ANSI & DIN Tap Dimensions.īelow is a link to our tap drill sizes recommended for each tap but there is an easy way to figure it out on your own using the Formulas Below:

Form drill tap chart