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MILLING BERYLLIUM COPPER
Milling operations are performed with ease on all forms and tempers of beryllium copper. High speed steel milling cutters are recommended for all general milling operations. However, benefit can be derived from using carbide milling cutters if the production lots are large and the machining tolerances tight. If carbide is used, the same
tool geometry as that recommended for steel tools will be satisfactory While satisfactory results can be achieved without the use of a cutting fluid, tool life, surface finish and chip removal will be improved ifa cutting fluid is used.
Speeds, feeds and cutter configuration are shown in Table 5 and Figure 6.

MILLING CUTTER CONFIGURATIONS - FIGURE 6

       

Recommended milling parameters - Table 5
ALLOY TEMPER CUTTING SPEED
(ft./min.)		 FEED (in./tooth)** DEPTH OF CUT (in.) WIDTH OF CUT (in.) HELIX ANGLE END MILLS CIRCULAR MILLS
RADIAL RAKE END CUTTING ANGLE PERIPHERAL RELIEF ANGLE END RELIEF ANGLE RADIAL RAKE ANGLE SIDE RELIEF ANGLE PRIMARY CLEARANCE ANGLE
25, M25, 165 A 200-250 .001-.003 .060-.200 .500 26°-30° 10° 1° 6° 3° 10° 10° 6°
H 200-250 .001-.003 .125-.200 .500 26°-30° 10° 1° 6° 3° 10° 10° 6°
AT, HT* 150-200 .001-.003 .060-.125 .500 26°-30° 10° 1° 6° 3° 10° 10° 6°
3, 10 A 500-800 .005-.008 .060-.200 .500 26°-30° 10° 1° 6° 3° 10° 10° 8°
H 600-800 .006-.010 .125-.200 .500 26°-30° 10° 1° 6° 3° 10° 10° 8°
AT, HT* 400-800 .005-.008 .060-.125 .500 26°-30° 10° 1° 6° 3° 10° 10° 8°
275C, 245C, 20C, 21C, 165C C, A 50-150 .001-.002 .050-.125 .500 26°-30° 10° 1° 6° 3° 10° 10° 8°
CT, AT* 25-50 .001-.002 .050-.125 .500 26°-30° 10° 1° 6° 3° 10° 10° 8°
3C, 10C C, A 100-200 .001-.002 .050-.125 .500 26°-30° 10° 1° 6° 3° 10° 10° 8°
CT, AT 75-150 .001-.002 .050-.125 .500 26°-30° 10° 1° 6° 3° 10° 10° 8°
* Speed and feed should be reduced when using milling cutters of smaller than approximately 3/16" dia.
** All speeds and feeds are for high speed steel tools.  If carbide milling cutters are used the recommended speeds should be increased by a factor of 2 to 3; however, the feed rate/tooth should not be increased.


Toll-Free: 1-800-552-8729 | Tel: (631) 434-3400 | Fax: (631) 434-3409
Busby Metals, Inc | 55 Davids Drive | Hauppauge, NY 11788

Busby Metals, Inc. is a stocking distributor of brass, bronze, copper, beryllium copper & aluminum bus conductors. Inventory includes rod, bar, sheet, strip, plate, tube, pipe, wire, castings & forgings. specialty alloys available from stock include: aluminum, naval, tobin, commercial, manganese, phosphor & silicon bronzes; beryllium, tellurium, leaded, zirconium, chromium, ETP & oxygen free coppers; free cutting brass; nickel silver; copper nickel. International specifications. Custom shapes. Metric sizes. Metal processing performed. Accredited ISO 9000 and MIL-I-45208A quality system. Chemical & physical test reports available. Technical support provided.