Thread Height
Compute tooth height H and minor dia. d1 of a 60° metric thread from pitch P.
Inputs
Formula
H = 0.866·P; d1 = d − 1.0825·P
Thread height affects joint strength and stress concentration.
Fundamentals
Compute tooth height H and minor dia. d1 of a 60° metric thread from pitch P.
This tool computes Thread Height from the formula: H = 0.866·P; d1 = d − 1.0825·P
History
Manufacturing evolved with machine tools and CNC; cutting-parameter calculation is central to process planning.
Engineering applications
Used for cutting parameters, tooling and forming process design.
Glossary
| Pitch P | Input parameter |
| Nominal d | Input parameter |
| Thread height H | Output result |
| Minor dia. d1 | Output result |
How to use
- Fill in Pitch P, Nominal d in the Inputs section (watch the unit on each field).
- Click Calculate; the tool evaluates the formula shown above.
- Read Thread height H, Minor dia. d1 in the results area.
Formula · Worked Example · Knowledge
Formula
核心计算关系：H = 0.866·P; d1 = d − 1.0825·P
输入变量：
- Pitch P
P— mm - Nominal d
d— mm
输出结果：
- Thread height H
H— mm - Minor dia. d1
d1— mm
假设/适用：Cutting params (v, f, a_p) must stay within tool/workpiece recommended windows.
Worked Example
根据公式 H = 0.866·P; d1 = d − 1.0825·P，取 Pitch P = 2 mm；Nominal d = 10 mm。
代入计算得：Thread height H = 1.732 mm；Minor dia. d1 = 7.835 mm。
Key Points
- Cutting params (v, f, a_p) must stay within tool/workpiece recommended windows.
- MRR scales with feed speed, depth and width; sets required spindle power.
- Feed f = f_z·z·n; match per-tooth feed with spindle speed.
Parameters
Inputs
| Parameter | Symbol | Unit | Default |
|---|---|---|---|
| Pitch P (mm) | P | mm | 2 |
| Nominal d (mm) | d | mm | 10 |
Outputs
| Result | Symbol | Unit |
|---|---|---|
| Thread height H | H | mm |
| Minor dia. d1 | d1 | mm |
Applications
- Cutting parameters and speed
- Gear measurement (3-wire/base tangent)
- Blanking and deep-drawing process
FAQ
What formula does this tool use?
This tool computes per ISO / AGMA / ASME standard formulas: H = 0.866·P; d1 = d − 1.0825·P
How accurate are the results?
Results match input precision, based on SI units and common engineering approximations; for critical duty re-check with a safety factor.
Where is it used?
Cutting parameters and speed