Machine Drawing

Production Drawings 391

dharm
d:\N-Design\Des20-1.pm5

Fig. 20.2 Gear

(^1234)
(^234)

A B C D E F

A

B

E

F

f0.06 A

2.5

1.25

2.5

1.25

A

f50 H7

f^75

53.8

+0.1

2 × 45°

3 CHAMFERS

0.1 A

12.5

12.5

1.6 × 45°

2 CHAMFERS

0.25 A^30

50

Number of teeth Z 50

Module m 3

Helix angle 16°

RH

b

D rectioni

14 Js9

±0.02

f50 H7+0.000

+0.025

Hardness BHN 240–280

NAME DATE MATL.

STEEL

45 C

TOLERANCE

± 0.5

FNSHII

25

12.5

SCALE

TITLE

HELICAL

GEAR

DRG No.

PD. 24–2

f161.82

–0.00–0.08

+0.0

14Js9