Cast Iron Sheave

Cast Iron Sheaves - Light Duty
Bored-to Size- One Groove
AK17 to AK184
for 3L, 4L or A Belts. See pages 44-46.
Ordering part number size + bore
Example: AK20-1/2
AK39-1-1/8
Bored-To-Size Sheaves
Type 1 Type 2 Type 3
Diameters Hub
Part Dimensions Dia Av.
No. O.D. 3L 4L orA Type F L P C Stock Bores in. M Wgt.
AK Sheaves are accurately machined
from gray cast iron, statically
balanced, painted and individually
packaged. They are furnished with
standard keyway & set screw.
All set screws are 5/16-18 knurled.
Recommended tightening torque is
110-130 inch-lbs.
1/2 None
5/8 - 7/8 3/16 x 3/32
15/16 - 1 1/4 1/4 x 1/8
1 5/16 - 1 3/8 5/16 x 5/32
1 7/16 - 1 3/4 3/8 x 3/16
AK
Standard Key Dimensions
Shaft Dia. Keyseat W x D
Pitch Dimensions Pitch
AK66 6.45 5.86 6.20 3 lh 3/4 1 5/32 15/32 1/16 5/8, 3/4, 1.6 3.1
1, 1.7
1 1/8 2.0
AK69 6.75 6.16 6.50 3 lh 3/4 1 15/32 23/32 0 3/4, 1.6 3.5
1, 1.7
1 1/8 2.2
AK71 6.95 6.36 6.70 3 lh 3/4 1 15/32 23/32 0 5/8, 3/4, 7/8 1.6 3.8
1, 1.7
1 1/8, 2.2
1 7/16 2.5
AK74 7.25 6.66 7.00 3 lh 3/4 1 15/32 23/32 0 5/8, 3/4, 1.6 4.2
15/16, 1, 1.7
1 1/8, 1 3/16, 1 1/4 2.2
1/2, 1 7/16 2.5
AK79 7.75 7.16 7.50 3 lh 3/4 1 15/32 23/32 0 3/4, 1.6 4.5
1, 1.7
1 1/8, 2.2
1 7/16 2.5
AK84 8.25 7.66 8.00 3 lh 3/4 1 15/32 23/32 0 5/8, 3/4, 1.6 5.0
15/16, 1, 1.7
1 3/16, 2.2
1/2, 1 7/16 2.5
AK89 8.75 8.16 8.50 3 lh 3/4 1 15/32 23/32 0 3/4, 1.6 5.4
1, 1.7
1 1/8, 2.2
1 7/16 2.5
AK94 9.25 8.66 9.00 3 lh 3/4 1 15/32 23/32 0 5/8, 3/4, 1.6 5.9
15/16, 1, 1.7
1 3/16, 1 1/4, 2.2
1/2, 1 7/16 2.5
AK99 9.75 9.16 9.50 3 sp 3/4 1 15/32 23/32 0 3/4, 1, 1.7 6.1
1 7/16 2.5
AK104 10.25 9.66 10.00 3 sp 3/4 1 15/32 23/32 0 5/8, 3/4, 1, 1.7 6.9
1 3/16, 1 1/4, 2.2
1 3/8, 1 7/16 2.5
AK109 10.75 10.16 10.50 3 sp 3/4 1 15/32 23/32 0 3/4, 1, 1.7

Cast Iron Sheaves - Light Duty
Bored-to Size- One Groove
AK17 to AK184