5/16
3/8
5/8
3/4
14-1/2° PRESSURE ANGLE
MATERIAL: Steel (Hardened)
RIGHT- AND LEFT-HAND
45° HELIX
Helical Gears - 20 Pitch
F
Face
Width
B
Bore
Catalog Number D
• 28.28 NORMAL DIAMETRAL PITCH
–––––
–––––
A 1C 7-N20025R
A 1C 7-N20050R
10
12
25
50
9/16
3/8
*A 1C 7-N20010L
*A 1C 7-N20012L
–––––
–––––
.500
.600
1.250
2.500
* Face key slot cut on end of gear.
NOTE: For 25 to 50 teeth, only O.D. hardened.
D
All parts will be discontinued when present stock is depleted.
Gears other than standard stock sizes are available on special order.
.571
.671
1.321
2.571
3/32 x 3/32
3/32 x 3/32
1/8 x 1/16
3/16 x 3/32
Keyway
width x depth
No. of
Teeth
P.D.
O.D.
Left-Hand
Right-Hand
REGULAR KEY SLOT
* FACE KEY SLOT
P.D. O.D.
B
F
P.D. O.D.
B
F
1-183 REV 7-29-05 JC
