Trepanning

Many applications for Dura-Bar end up having a hole machined through the center. Often this is one of the longer machining steps. To help speed up the machining process, Dura-Bar offers trepanned tubes from a variety of round bar stock sizes to meet a wide range of customer tubing applications.

The 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.

Dura-Bar Trepanning Equipment

Capabilities

Minimum Dimensions

Nominal O.D. Minimum Wall Thickness Total Minimum Wall Thickness
0.000" - 3.000" 0.562" 1.125"
3.001" - 6.000" 0.625" 1.250"
6.001" - 12.000" 0.687" 1.375"
12.001" - 16.000" 0.750" 1.500"

Example

Wall thickness minimums are based on actual O.D. and I.D. 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.
Overall wall thickness 3.110" - 1.750" = 1.360"
Single wall thickness 1.360" / 2 = 0.680"

Dura-Bar®
1800 West Lake Shore Drive
Woodstock, IL 60098

815-338-7800

800-BAR-MILL (227-6455)

Fax: 815-338-1549 Sales

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