67

0.250 0.250

0.225 0.200

0.280 0.250

24

0.330 0.300
0.385 0.340

0.440 0.400
21% 0.490 0.455

0.555 0.515
0.605 0.560

0.670 0.625
18 0.715 0.675
0.780 0.730
0.825 0.770
0.860 0.830

0.925 0.860
0.980 0.920

1.050 0.985
1.080

3

1.050

1.265 11

1.475 1.390 116
1.600 1.475 1
1.600

1.700
1.810

1.710

0101100101010
2 2 2 2 2 2 2 2 33333333 ++++44

HHHHHHH 1 2 2 2 2 2 2 2 2

TS400 100

222

32804

20

18

18

16

16

14

14

51% 2.400 2.290

51% 2.485 2.425

IO

3101

2.600 2.480 1

++3

312

32

4

1212

NOTE.

-

-Tapper taps differ from machine taps in not having a

the shank and when

square on the end of the shank. They are used in nut tapping machines, the nuts being run over the tap on to full the tap is removed and the nuts slid off. placed for another lot of nuts.

The tap is then re

NOTE. These have no fixed standard form of thread, being sually something like an Acme thread in general appearance.

NOTE.

2 114

2 2 2 2 2 2 2 2

No_koooko

I

222
20

22

Jokoooko

41 0.170 0.150
0.225 0.200
0.280 0.250

51 0.330 0.300
50.385 0.340
0.440 0.400

6 0.490 0.455
7 0.555 0.515
70.605 0.560
0.670 0.625
8 0.715 0.675
0.780

0.730 I
0.770 1

ooko ook ooko.

16

0.860 110

233333

ΙΟ

31% 91 0.825

ΙΟ

9 0.925

16

16 IO 15

16 IO

1.375

I 2

I 2

0.985 11 10 1.070 1

4 12 1.475 23434 12 1.600 25

5 13 1.700

1.265 11 1

1.390111 1.475 11 12 1.600 1 1 12

6 I

-The Sellers hob is designed to be run on centers, the

work, such as hand or die chasers, being held against it and fed

along by the lathe carriage.