RIGHT HAND RIGHT HAND LAYDOWN THREADING SYSTEM EXTERNAL THREADING SELECTION OF DESIRED ANVIL For AL and AVR Toolholders only LEFT HAND LEFT HAND The anvil in a standard VARDEX toolholder is normally a parallel one (c=0°), and the 1.5° helix is built in the toolholder. With VARDEX system a wide choice of helix angles can be obtained without changing the toolholder, this is accomplished by simply changing the anvil with another one containing the correct angle. The following table shows the different helix angles that can be obtained by using standard anvils. DIAGRAM OF THREAD HELIX ANGLES To calculate the helix angle of a given thread, use this formula: P π De B = Thread Helix Angle De = effective diameter of thread where P = Pitch of thread See chart for approximate helix angles. c c c c c c c c c c c c c c A A B B POSITION TOOLHOLDER INSERT ANVIL (PART# 2-806) TURNING 1-1a R.H. R.H. YE (3, 4, 4U, 5, 5U) 1N to 3P R.H. TOWARDS CHUCK 2-2a R.H. R.H. YE (3, 4, 4U, 5, 5U) 1N to 3P L.H. FROM CHUCK 3-3a L.H. L.H. YI (3, 4, 4U, 5, 5U) 2N to 3N L.H. FROM CHUCK 4-4a L.H. L.H. YI (3, 4, 4U, 5, 5U) 1N to 3P R.H. FROM CHUCK 5-5a R.H. R.H. YE (3, 4, 4U, 5, 5U) 1N to 3P R.H. FROM CHUCK 6-6a L.H. L.H. YI (3, 4, 4U, 5, 5U) 1N to 3P L.H. TOWARDS CHUCK POSITION TOOLHOLDER INSERT ANVIL (PART#2-806) TURNING 7-7b R.H. R.H. YI(3, 4, 4U, 5, 5U) 1N to 3P R.H. TOWARDS CHUCK 8-8b L.H. L.H. YE(3, 4, 4U, 5, 5U) 2N to 3N L.H. FROM CHUCK 9-9b L.H. L.H. YE(3, 4, 4U, 5, 5U) 1N to 3P L.H. TOWARDS CHUCK 10-10b R.H. R.H. YI(3, 4, 4U, 5, 5U) 2N to 3N R.H. FROM CHUCK EX R.H. AND IN L.H. ANVIL SEC. A-A EX L.H. AND IN R.H. ANVIL SEC. B-B ANVIL ANGLE-C +3° +2° +1° 0° -1° -1.5° -2° -3° STD. TOOLHOLDER HELIX ANGLE +1.5° +1.5° +1.5° +1.5° +1.5° +1.5° +1.5° +1.5° RESULTANT HELIX ANGLE 4.5° 3.5° 2.5° 1.5° 0.5° 0° -0.5° -1.5° INSERT SIZE (I.C.) TOOLHOLDER A N V I L P A R T # 2 - 8 0 6 3/8 EX RH/IN LH YE3-3P YE3-2P YE3-1P YE3 YE3-1N YE3-1.5N YE3-2N YE3-3N EX LH/IN RH YI3-3P YI3-2P YI3-1P YI3 YI3-1N YI3-1.5N YI3-2N YI3-3N 1/2 EX RH/IN LH YE4-3P YE4-2P YE4-1P YE4 YE4-1N YE4-1.5N YE4-2N YE4-3N EX LH/IN RH YI4-3P YI4-2P YI4-1P YI4 YI4-1N YI4-1.5N YI4-2N YI4-3N 1/2U EX RH/IN LH YE4U-3P YE4U-2P YE4U-1P YE4U YE4U-1N YE4U-1.5N YE4U-2N YE4U-3N EX LH/IN RH YI4U-3P YI4U-2P YI4U-1P YI4U YI4U-1N YI4U-1.5N YI4U-2N YI4U-3N 5/8 EX RH/IN LH YE5-3P YE5-2P YE5-1P YE5 YE5-1N YE5-1.5N YE5-2N YE5-2N EX LH/IN RH YI5-3P YI5-2P YI5-1P YI5 YI5-1N YI5-1.5N YI5-2N YI5-3N 5/8U EX RH/IN LH YE5U-3P YE5U-2P YE5U-1P YE5U YE5U-1N YE5U-1.5N YE5U-2N YE5U-3N EX LH/IN RH YI5U-3P YI5U-2P YI5U-1P YI5U YI5U-1N YI5U-1.5N YI5U-2N YI5U-3N - 866 - Bass Tool & Supply, Inc. Houston Email Fax Toll Free www.basstool.com (713) 682-1889 [email protected] (713) 681-4931 800-442-0042
