Drilling Time
Estimate single-hole drilling time t from depth L, approach a, feed f and speed n.
Inputs
Formula
t = (L + a)/(f·n)
Deep holes need chip-clearing/coolant pauses.
Fundamentals
Estimate single-hole drilling time t from depth L, approach a, feed f and speed n.
This tool computes Drilling Time from the formula: t = (L + a)/(f·n)
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
| Hole depth L | Input parameter |
| Approach a | Input parameter |
| Feed/rev f | Input parameter |
| Drilling time t | Output result |
How to use
- Fill in Hole depth L, Approach a, Feed/rev f, Speed n in the Inputs section (watch the unit on each field).
- Click Calculate; the tool evaluates the formula shown above.
- Read Drilling time t in the results area.
Formula · Worked Example · Knowledge
Formula
核心计算关系：t = (L + a)/(f·n)
输入变量：
- Hole depth L
L— mm - Approach a
a— mm - Feed/rev f
f— mm/rev - Speed n
n— rpm
输出结果：
- Drilling time t
t— s
假设/适用：Cutting params (v, f, a_p) must stay within tool/workpiece recommended windows.
Worked Example
根据公式 t = (L + a)/(f·n)，取 Hole depth L = 30 mm；Approach a = 5 mm；Feed/rev f = 0.2 mm/rev；Speed n = 1,000 rpm。
代入计算得：Drilling time t = 10.5 s。
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 |
|---|---|---|---|
| Hole depth L (mm) | L | mm | 30 |
| Approach a (mm) | a | mm | 5 |
| Feed/rev f (mm/rev) | f | mm/rev | 0.2 |
| Speed n (rpm) | n | rpm | 1000 |
Outputs
| Result | Symbol | Unit |
|---|---|---|
| Drilling time t | t | s |
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: t = (L + a)/(f·n)
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