To convert from millimeters (mm) to inches:
| Factor | Value |
|---|---|
| 1 inch to mm | 25.4 mm |
| 1 mm to inch | 0.03937 inches |
A 138mm drill bit is commonly used in:
| Size (Mm) | Size (Inches) | Use | Page |
|---|---|---|---|
| 136 mm | 5.3543307087 inches | General purpose drilling | View |
| 137 mm | 5.3937007874 inches | General purpose drilling | View |
| 138 mm | 5.4330708661 inches | General purpose drilling | View |
| 139 mm | 5.4724409449 inches | General purpose drilling | View |
| 140 mm | 5.5118110236 inches | General purpose drilling | View |
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