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Threading – Overview 502

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External Threading Toolholders

Order No.

Type

Description

Catalogue page

2969 0115 – 2969 00005

SER/SEL

Clamping holder

2/250

2969 0206 – 2969 0324 2969 0500 – 2969 0530

TN 16 ER/EL

60° metric, solid profile 55° WW, solid profile

2/250 2/251

TN 16 ER

Internal Threading Bars

Cutting Tools 2

Order No.

Type

Description Boring bar

Catalogue page

2969 0730 – 2969 0858

SIR/SIL

2/252

2969 0900 – 2969 0939 2969 2000 – 2969 2027

TN 11–16 NR/L 60° metric, solid profile TN 11–16 NR/L 55° WW, solid profile

2/253 2/254

Threading – Technical Information

60° ISO metric 55° Whitworth

solid profile for inner and outer processing

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

Radial feed

Along the edge

Reciprocal feed

Name and formulas

RPM

Gradient

D = workpiece diameter

(mm) (mm)

= edge diameter

D 2

Vc • 1000

(nominal diameter)

n =

(min -1 )

P h = P • number of turns (min)

π • D

n = speed P = pitch

(min -1 )

(mm) (mm)

= gradient

P h V f

= path speed

(m/min)

Cutting speed

Tilt angle

TPI = turn per inch Vc = cutting speed

π • D • n

(m/min)

P h

Vc =

(m/min)

λ = arctan

(°)

1000

D 2

• π

λ = tilt angle

(°)

Path speed

Conversion inches to metric

25.4 P

n • P h 1000

TPI =

=

(m/min)

V f

2/248