Trepanning
Overview
Many applications for Royal Metals Ltd. Dura-Bar end up having a hole machined through the center. This is usually one of the more time-consuming steps in machining. To help speed up this process, Royal Metals Ltd. offers trepanned tubes from a variety of round bar stock sizes to fulfill a wide range of customer tubing requirements.
The Royal Metals Ltd. Dura-Bar trepanning process and modern equipment assures customers of the most precise and accurate trepanned products to meet exact specifications. All tubes are left with sufficient stock for clean-up in most applications.
Many trepanned sizes are available from stock, and additional sizes can be custom ordered.
Capabilities
Minimum Dimensions
All thickness minimums are based on actual O.D. and I.D.
| Nominal O.D. | Minimum Wall Thickness |
|---|---|
| 0.000" - 3.000" | 0.562" |
| 3.001" - 6.000" | 0.625" |
| 6.001" - 12.000" | 0.687" |
| 12.001" - 16.000" | 0.750" |
Example
A customer requiring a 3.00" O.D. x 2.00" I.D. tube will receive a tube which is 3.110" O.D. x 1.750" I.D.
| Example | 3.000" as-cast x 2.000" I.D. |
|---|---|
| Actual | 3.110" O.D. x 1.750" I.D. |
| Single wall thickness | 1.360" / 2 = 0.680" |