User-coefficient planning screen
Tapping torque & power
Inputs
Declared major-diameter planning input; no thread form or tolerance is inferred.
User-entered empirical coefficient for the stated material/tool/process; it is not looked up or selected here.
User-entered non-dimensional multiplier for the stated engagement/process context.
Steady rotational speed used only for mechanical power arithmetic.
Results
User-coefficient first-estimate tapping torque
3
Ideal mechanical spindle power
0.15708
Declared diameter cubed
1,000
mm³T = k·d³·e; P = Tω = 2πTn/(60·1000)
A first-pass number, not a code check, certification, or approval. Read the method and its limits below. What this is and is not.
Nearby: Milling removal rate · Drilling speed & time · Turning material removal · Milling cutting parameters
Method
Formula, when it applies, and when it does not
Calculate first-estimate tapping torque and mechanical spindle power from coefficient, diameter, engagement factor, and speed.
T = k·d³·e; P = Tω = 2πTn/(60·1000)
When
- User-entered torque coefficient
- Declared engagement multiplier
- Steady spindle speed
Don’t
- This is a planning-only user-coefficient torque and mechanical-power arithmetic screen. It does not choose a tap, thread form, drill size, material, hardness, lubricant, cutting speed, engagement percentage, feed, tool life, machine capability, process parameters, or approve a tap operation.