Threading Solutions - Vargus

Y
Threading
Technical Data
Step by Step Thread Turning - Example 1
1 1 /2 x 10UN
Application:
Thread: External Right Hand
1 1 /2 x 10UN
Material: 4140 (25 HRc)
1
Choose the Thread Turning Method
(see page 121)
Feed direction towards the chuck was chosen.
Therefore an external right hand insert and an external right hand holder will be used.
2
Choose the Insert Size (see page 26)
X
L
IC
Chosen insert: 3ER10UN...
Insert Size Pitch Ordering Code
IC L Inch tpi
RH
Anvil
RH
Toolholder
3/8” .63 103ER10UN... YE3 AL..-3(LH)
3
Choose the Toolholder (see page 96)
2°
H1
H
F
L 2
L1
B
Chosen toolholder: AL 100-3
Insert Size
IC
Ordering Code
RH
3/8” AL100-3
Dimensions inch
H=H1=B F L1 L2
1.00 1.00
6.00 1.20
4
Determine the Helix Angle (see page 122)
Pitch P*
[mm]
12
11
10
9
8
7
6
5
4
3
2
1
0
Special
Toolholders
Pitch P*
5° 4° 3° b=2°
[tpi]
b=1°
2 4
2.25
2.5
3
3.5
4
4.5
5
6
7
9
11
14
18
24
D b =0°
6 8
Pitch diameter [inch]
From the table, using a pitch of
10 tpi and a workpiece diameter
of 1 1/2”,
we find the helix angle to be 1.5°.
137