Page 286 - Industrial Tools Catalog (1)

Thread tools \ Core hole tables, thread cutting, thread forming, thread milling

nominal core hole nominal core hole
(drill) Ø
(drill) Ø
dia. gear DIN 336 core dia. female thread 2B dia. gear DIN 336 core dia. female thread 2B
per inch mm min. mm max. mm per inch mm min. mm max. mm
No. 8-36 3,50 3,404 3,607 1-12 23,25 23,114 23,571
No. 10-32 4,10 3,962 4,166 1 1/8-12 26,50 26,289 26,746
No. 12-28 4,60 4,496 4,724 1 1/4-12 29,50 29,464 29,921
1/4-28 5,50 5,359 5,588 1 3/8-12 32,75 32,639 33,096
5/16-24 6,90 6,782 7,036 1 1/2-12 36,00 35,814 36,271
3/8-24 8,50 8,382 8,636
core hole diameter for thread cutting and thread milling
BSW (Whitworth) thread BS84

core hole
nominal dia. gear (drill) dia. core dia. female thread nominal dia. gear core hole core dia. female thread
(drill) dia.
per inch mm min. mm max. mm per inch mm min. mm max. mm
W 1/16 60 1,20 1,045 1,230 W 5/8 11 13,50 12,918 13,558
W 3/32 48 1,80 1,704 1,912 W 3/4 10 16,25 15,797 16,483
W 1/8 40 2,50 2,362 2,591 W 7/8 9 19,25 18,611 19,353
W 5/32 32 3,20 2,952 3,214 W 1 8 22,00 21,334 22,147
W 3/16 24 3,60 3,407 3,745 W 1 1/8 7 24,50 23,928 24,832
W 7/32 24 4,50 4,201 4,539 W 1 1/4 7 27,75 27,103 28,007
W 1/4 20 5,10 4,724 5,156 W 1 3/8 6 30,50 29,504 30,528
W 5/16 18 6,50 6,130 6,590 W 1 1/2 6 33,50 32,679 33,703
W 3/8 16 7,90 7,492 7,987 W 1 5/8 5 35,50 34,769 35,963
W 7/16 14 9,20 8,789 9,330 W 1 3/4 5 39,00 37,944 39,138
W 1/2 12 10,50 9,989 10,591 W 2 4,5 44,50 43,571 44,877
W 9/16 12 12,00 11,577 12,179
core hole diameter for thread cutting and thread milling
(Whitworth) pipe thread (in accordance with DIN ISO 228-1)

core hole core hole
nominal dia. gear (drill) Ø core dia. female thread nominal dia. gear (drill) Ø core dia. female thread
DIN 336 DIN 336
per inch mm min. mm max. mm per inch mm min. mm max. mm
G 1/16 28 6,80 6,561 6,843 G 7/8 14 28,25 27,877 28,418
G 1/8 28 8,80 8,566 8,848 G 1 11 30,75 30,291 30,931
G 1/4 19 11,80 11,445 11,890 G 1 1/8 11 35,50 34,939 35,579
G 3/8 19 15,25 14,950 15,395 G 1 1/4 11 39,50 38,952 39,592
G 1/2 14 19,00 18,631 19,172 G 1 1/2 11 45,25 44,845 45,485
G 5/8 14 21,00 20,587 21,128 G 1 3/4 11 51,00 50,788 51,428
G 3/4 14 24,50 24,117 24,658 G 2 11 57,00 56,656 57,296
core hole diameter for thread cutting and thread milling
steel-armoured pipe thread according to DIN 40430

core hole
nominal dia. gear (drill) dia. core dia. female thread nominal dia. gear core hole core dia. female thread
(drill) dia.
per inch mm min. mm max. mm per inch mm min. mm max. mm
Pg 7 20 11,40 11,280 11,430 Pg 21 16 26,90 26,780 27,030
Pg 9 18 14,00 13,860 14,010 Pg 29 16 35,50 35,480 35,730
Pg 11 18 17,30 17,260 17,410 Pg 36 16 45,50 45,480 45,730
Pg 13.5 18 19,00 19,060 19,210 Pg 42 16 52,50 52,480 52,730
Pg 16 18 21,30 21,160 21,310 Pg 48 16 57,80 57,780 58,030
core hole diameter for thread cutting and thread milling
EG thread metr./metr. fine (EG M 14 x 1.25) for thread inserts DIN 8140

core hole
nominal dia. pitch P (drill) dia. core dia. female thread nominal dia. pitch P core hole core dia. female thread
(drill) dia.
mm mm min. mm max. mm mm mm min. mm max. mm
EG M 4 0,70 4,20 4,152 4,292 EG M 10 1,50 10,50 10,324 10,560
EG M 5 0,80 5,25 5,174 5,334 EG M 12 1,75 12,50 12,379 12,644
EG M 6 1,00 6,30 6,217 6,407 EG M 14 1,25 14,40 14,271 14,483
EG M 8 1,25 8,40 8,271 8,483 EG M 16 2,00 16,50 16,433 16,733
core hole diameter for thread cutting and thread milling
EG UNC (UNC-STI) thread for threaded wire inserts ASME B18.29.1

Source: Hahn+Kolb Werkzeuge GmbH
286 Technical data subject to change. www.iconridge.com
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