TECHNICAL INFORMATION
420
Ground Ware
TECHNICAL INFO.
Standard Dimensions for Full-length Interchangeable Taper-Ground Joints
Standard Dimensions for Medium-length Interchangeable Taper-Ground Joints
Computed Diameter at Large End of Ground Zone
Computed Diameter at Large End of Ground Zone (Gauging Point)
Standard Joint Size Number
Approximate Approximate
Standard Joint Size Number
Approximate Diameter at
Approximate
Diameter at Small End
Length of
Length of
Ground Zone (Gauging Point)
Small End
Ground Zone
( Designation)
mm
mm
mm
( Designation)
mm
mm
mm
7/25.................. 5 10/30................ 7 12/30............. 9.5 14/35............... 11 19/38............... 15 24/40............... 20 29/42............... 25 34/45............... 30 40/50............... 35 45/50............... 40 50/50............... 45 55/50............... 50 60/50............... 55 71/60............... 65 103/60............... 97
25 30 30 35 38 40 42 45 50 50 50 50 50 60 60
7.5
5/12...................... 3.8 7/15...................... 6.0 10/18...................... 8.2 12/18.................... 10.7 14/20.................... 12.5 19/22.................... 16.6 24/25.................... 21.5 29/26.................... 26.6 34/28.................... 31.7 40/35.................... 36.5
12 15 18 18 20 22 25 26 28 35
5.0 7.5
10.0 12.5 14.5 18.8 24.0 29.2 34.5 40.0 45.0 50.0 55.0 60.0 71.0
10.0 12.5 14.5 18.8 24.0 29.2 34.5 40.0
103.0
Standard Dimensions for Short-length Interchangeable Taper-Ground Joints
Standard Dimensions for Interchangeable Spherical-Ground Joints
Computed Diameter at Large End of Ground Zone
Standard Joint Size Number
Approximate Approximate
Standard Joint Size Number
Nominal
Diameter at Small End
Length of
Nominal Diameter
Tube
Gauging Ball
Ground Zone (Gauging Point)
Diameter
Diameter
( Designation)
mm
mm
mm
( Designation)
mm
I.D. mm
inches
5/8................. 4.2 7/10................ 6.5 10/7................ 9.3 10/10............... 9.0 12/10...............11.5 14/10...............13.5 19/10...............17.8 24/12...............22.8 29/12...............28.0 34/12...............33.3 40/12...............38.8 45/12...............43.8 50/12...............48.8 55/12...............53.8 60/12...............58.8 71/15...............69.5
8
5.0 7.5
7/1....................... 7 12/1................... 12 12/1.5................ 12 12/2................... 12 12/3................... 12 12/5................... 12 18/7................... 18 18/9................... 18 28/12................. 28 28/15................. 28 35/20................. 35 35/25................. 35 40/25................. 40 50/30................. 50 65/40................. 65 75/50................. 75 102/75............... 102
1 1 2 3 5 7 9
.28125 ± .00005 .5000 ± .0001 .5000 ± .0001 .5000 ± .0001 .5000 ± .0001 .5000 ± .0001 .7500 ± .0001 .7500 ± .0001 1.1250 ± .00015 1.1250 ± .00015 1.3750 ± .00015 1.3750 ± .00015 1.6500 ± .00015 2.0000 ± .00015 2.5000 ± .0002 3.0000 ± .00025 4.0000 ± .0003
10
7
10.0 10.0 12.5 14.5 18.8 24.0 29.2 34.5 40.0 45.0 50.0 55.0 60.0 71.0
1.5
10 10 10 10 12 12 12 12 12 12 12 12 15
12 15 20 25 25 30 40 50 75
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