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Cutting Tools
2
Name and formulas
External Threading Toolholders
Internal Threading Bars
Threading – Technical Information
Radial feed
Along the edge
Reciprocal feed
Order No.
Type
Description
Catalogue page
2969 0115 – 2969 00005
SER/SEL
Clamping holder
2/250
2969 0206 – 2969 0324
TN 16 ER/EL
60° metric, solid profile
2/250
2969 0500 – 2969 0530
TN 16 ER
55° WW, solid profile
2/251
Order No.
Type
Description
Catalogue page
2969 0730 – 2969 0858
SIR/SIL
Boring bar
2/252
2969 0900 – 2969 0939
TN 11–16 NR/L 60° metric, solid profile
2/253
2969 2000 – 2969 2027
TN 11–16 NR/L 55° WW, solid profile
2/254
60° ISO metric
solid profile for inner and outer processing
55° Whitworth
solid profile for inner and outer processing
With solid profile turning plates the inner and outer diameters turn together,
so that all parts are concentric. Burr-free profiles are achieved, exactly to standard,
in one operation.
Number of cuts (passes) and delivery methods
Gradient mm
0.50 0.75 1.00 1.25 1.50
1.75
2.00
2.50
3.00
Threads/Inch
48
32
24
20
16
14
12
10
8
Number/passes
4–6 4–7 4–8
5–9 6–10 7–12 7–12 8–14 9–16
Path speed
Conversion
inches to metric
RPM
Cutting speed
Gradient
D = workpiece diameter
(mm)
D
2
= edge diameter
(mm)
(nominal diameter)
n = speed
(min
-1
)
P = pitch
(mm)
P
h
= gradient
(mm)
V
f
= path speed
(m/min)
TPI = turn per inch
Vc = cutting speed
(m/min)
λ
= tilt angle
(°)
Tilt angle
n =
Vc • 1000
(min
-1
)
π • D
Vc =
π
• D • n
(m/min)
1000
V
f
=
n • P
h
(m/min)
1000
P
h
= P • number of turns (min)
TPI =
25.4
P
λ
= arctan
P
h
(°)
D
2
• π
Threading – Overview
502