Modified Stock Gearing - Boston Gear

Mounted Ball Bearings
F/T Series
Flanged Units – Standard Duty; Eccentric Locking Collar
F
F
A
SQUARE
B
SQUARE
STANDARD TOLERANCES
F
Dimensions
Tolerance
Bore All +.0012 to –.0000
K
B
A
J
R
P
S
E
D
L
C
ENVELOPE AND BOLT SPACING DIMENSIONS IN INCHES
Bore
4-BOLT
2-BOLT
A B A B K
1/2
5/8
2-7/8 2-1/8 3-3/4 3 2-9/32
3/4 3-3/8 2-1/2 4-13/32 3-17/32 2-37/64
7/8
15/16 3-3/4 2-3/4 4-57/64 3-57/64 2-53/64
1
1-1/8
1-3/16 4-1/4 3-1/4 5-19/32 4-19/32 3-19/64
1-1/4S
1-1/4
1-5/16
1-3/8
4-5/8 3-5/8 6-1/8 5-1/8 3-11/64
1-7/16
1-1/2 5-1/8 4 — — —
1-5/8
1-11/16 5-3/8 4-1/8 — — —
1-3/4
1-15/16 5-5/8 4-3/8 7-7/16 6-3/16 4-9/16
2
2-3/16
6-3/8 5-1/8 — — —
2-1/4
2-7/16
6-7/8 5-5/8 — — —
Bore C D E
ALL DIMENSIONS IN INCHES
P R* Approx.
F
J L F Setscrew S Weight (Lbs.)
Bolt
T UNF F T
1/2
5/8
7/16 1-1/16 1-37/64 3/8 2 1/4 1-9/64 1/4-28 7/8 .9 .9
3/4 1/2 1-7/32 1-13/16 3/8 2-1/4 19/64 1-19/64 1/4-28 59/64 1.7 1.2
7/8
15/16 9/16 1-1/4 1-27/32 7/16 2-1/2 19/64 1-1/2 1/4-28 59/64 2.0 1.6
1
1-1/8
1-3/16 9/16 1-11/32 2 7/16 2-15/16 23/64 1-3/4 5/16-24 1-3/64 2.7 2.1
1-1/4S
1-1/4
1-5/16
1-3/8
5/8 1-3/8 2-1/8 1/2 3-1/4 47/64 2-3/16 3/8-24 1-17/64 3.7 2.8
1-7/16
1-1/2 11/16 1-37/64 2-11/32 1/2 3-3/4 27/32 2-23/64 3/8-24 1-3/8 5.0 —
1-5/8
1-11/16 11/16 1-39/64 2-11/32 9/16 3-7/8 27/32 2-1/2 3/8-24 1-3/8 5.4 —
1-3/4
1-15/16 11/16 1-51/64 2-19/32 9/16 4-1/8 31/32 2-3/4 3/8-24 1-1/2 6.0 4.8
2
2-3/16
3/4 1-31/32 2-15/16 5/8 4-1/2 1-3/32 3 7/16-20 1-23/32 8.4 —
2-1/4
2-7/16
3/4 2-1/8 3-3/16 5/8 4-7/8 1-7/32 3-5/16 7/16-20 1-27/32 10.0 —
*2 at 120°.
For Load Ratings, See Engineering Section, Page 237.
226 Boston Gear 800-825-6544 P-1930-BG 04/10