AC Adjustable Countersinks

64 products available - Order by EDP Number

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About AC Adjustable Countersinks

Severance AC countersinks are made of high speed steel as an economical means of combining drilling and countersinking into a continuous operation. Each one is used with a standard twist drill of the listed size, so it need not be discarded if the drill breaks or is used up, and it can be positioned at any point along the fluted section (it works best set to start countersinking when the drilling is complete). For wood and light metals such as mild steel, magnesium, brass and die cast, and some plastics. Drill not included.

Made in High-Speed Steel. Special diameters, drill sizes, flute configurations and angles are available, including a version for aluminum and magnesium.

Ordering Tip

All tools are ordered by their EDP Number (Electronic Data Processing). Find your tool in the table below and use the EDP number when placing orders with your distributor.

Adjustable Countersinks

Quick Facts

  • 64 products in this group
  • Made in Saginaw, Michigan
  • Precision ground to exacting tolerances
  • Available through authorized distributors
  • Resharpenable for extended life
Download Full Catalog (PDF)

Available Products

All EDP numbers listed below. Request a quote for any EDP, or find a stocking distributor.

Adjustable Countersinks

Body Dia. Drill Size OAL Tool Name 82° EDP 90° EDP
6-AC Series (3/8" Body)
3/8"1/8" (.1250)1"6-AC-20357203622
3/8"#29 (.1360)1"6-AC-290357303623
3/8"#28 (.1405)1"6-AC-280357403624
3/8"#25 (.1495)1"6-AC-250357503625
3/8"#21 (.1590)1"6-AC-210357603626
3/8"#19 (.1660)1"6-AC-190357703627
8-AC Series (1/2" Body)
1/2"3/16" (.1875)1-1/8"8-AC-3/160357803628
1/2"#16 (.1770)1-1/8"8-AC-160357903629
1/2"#14 (.1820)1-1/8"8-AC-140358003630
1/2"7/32" (.2188)1-1/8"8-AC-7/320358103631
1/2"#10 (.1935)1-1/8"8-AC-100358203632
1/2"#7 (.2010)1-1/8"8-AC-70358303633
10-AC Series (5/8" Body)
5/8"7/32" (.2188)1-1/8"10-AC-7/320358403634
5/8"1/4" (.2500)1-1/8"10-AC-40358503635
5/8"#3 (.2130)1-1/8"10-AC-30358603636
5/8"#2 (.2210)1-1/8"10-AC-20358703637
5/8"9/32" (.2813)1-1/8"10-AC-9/320358803638
5/8"5/16" (.3125)1-1/8"10-AC-5/160358903639
5/8"D (.2460)1-1/8"10-AC-D0359003640
5/8"I (.2720)1-1/8"10-AC-I0359103641
5/8"F (.2570)1-1/8"10-AC-F0360303604
14-AC Series (7/8" Body)
7/8"Q (.3320)1-1/2"14-AC-Q0359203642
7/8"R (.3390)1-1/2"14-AC-R0359303643
7/8"S (.3480)1-1/2"14-AC-S0359403644
7/8"3/8" (.3750)1-1/2"14-AC-3/80359503645
7/8"U (.3680)1-1/2"14-AC-U0359603646
7/8"25/64" (.3906)1-1/2"14-AC-25/640359703647
18-AC Series (1-1/8" Body)
1-1/8"27/64" (.4219)1-3/4"18-AC-27/640359803648
1-1/8"7/16" (.4375)1-3/4"18-AC-7/160359903649
1-1/8"29/64" (.4531)1-3/4"18-AC-29/640360003650
1-1/8"1/2" (.5000)1-3/4"18-AC-1/20360103651
1-1/8"31/64" (.4844)1-3/4"18-AC-31/640360203652

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