1937 n 17th ave - MariTool
Speeds for Form Taps. Spiral plug and bottoming.
High Speed Steel Bright Finish or TiN Coated. Taps are made is the USA.
Material Bhn SFM
|Aluminum 2011,2024,6061,7075 |-- |70-100 |
|Aluminum cast 208,213,360,A380.0,705.70 |-- |40-100 |
|Low Carbon Steels |120-250 |30-70 |
|Medium Carbon Steel 4140, 8620 |250-325 |10-50 |
|Tool Steel, H.S.S A2,D2,M2,M42 |* |* |
|Cast Iron |* |* |
|Stainless Steel 300 Series |100-260 |6-30 |
|Stainless Steel 400 Series |150-310 |4-20 |
|Stainless Steel 15-5, 17-4 |100-300 |6-30 |
|Titanium 6AL-4V |110-180 |6-35 |
|Inconel 625, 718 |* |* |
|Copper, Bronze |120-160 |30-50 |
|Brass (360 half hard) |-- |50-60 |
* use a different style tap
Speeds are based on bright finish. Increase speeds by 20-40% for Tin coated taps.
Your machine's ability to synchronize rpms and required feedrate must be considered first before using recommended speeds in this chart.
NOTICE.. hole size for form taps are considerably different than for normal cutting taps. Also any variation on hole size will vary tap thread size much more than compared to cutting taps. Form taps will require 0-50% more torque than conventional tapping.
6 guidelines for best cutting results
|Chamfer hole before tapping |keep tool concentricity low |Use proper drill size |
|Use plenty of coolant |avoid hitting bottom of blind hole |Use floating tap holder |
Note: Cutting speeds, feeds, and lubrication data are given as starting values only. Parameters should be varied to suite your particular conditions. MariTool is constantly improving products, tolerances, and reliability. As such, these speeds and feeds are subject to change without prior notice. Cutting tools may shatter and or produce dangerous fumes when being used. Appropriate protection is advised. REV A
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