Общий каталог Widia 2017 - страница 608

Предыдущая страница Следующая страница

Навигация

TopThread

Insert Identifi cation System

NDC38RDR75

NDC38RDR75
TypeInsertAdditionalInsertIndustry ThreadHandDefi nitionAdditional
of InsertInformationSizeIdentifi cationof Insertof InsertInformation
N — TopThread™ B— ButtressIndicates API orR— Right Hand
drilling industry
form designation
F— Fine pitch(e.g., 10RD,L— Left Hand
8RD, .038)
S— Stub Acmeor
controlled root
radius threading
C— Crestinginserts indicate the

root radius in 0,025 increments (NJ, P — Positive rake NJF, NJP, NJK)

or

K — Fine pitch, positive M indicates metric

ISO thread

A — Acme

D — API or NPT

J — UNJ thread

T — 60° V thread

W — 55° V Whitworth

T

TopThread insert dimensions

A T

insert sizemmmm
12,542,54
25,563,81
38,744,95
411,516,48
517,489,65
611,519,73
87,9311,13

NJF NDC-V-M NTC

  • Threads per inch or pitch (for metric)
  • “A” or “B” type Buttress insert
  • Taper per foot — API threads

I — Internal thread

E — External thread (used only if internal and external thread forms are different) M — Multiple tooth

K — Standard chip control

C — Coarse pitch

D — Dryseal

NA NT NT-K