Modified Stock Gearing - Boston Gear

Mounted Ball Bearings
MBF Series
Flanged Units – Medium Duty; Extended Inner Race – Setscrew Locking
Features —
One-piece high grade cast iron housing.
Deep groove ball bearings for high radial and thrust loads.
Precision machined housing bore and spherical outer race for full self-alignment.
Synthetic lip type seal with steel flinger.
Positive locking by setscrews through extended inner race.
1/4-28 threaded grease fitting and channel through outer race allow relubrication.
F
ORDER BY CATALOG NUMBER OR ITEM CODE
Bore
Catalog
Item
Number
Code
1-7/16 MBF-1-7/16 64590
1-1/2 MBF-1-1/2 64591
1-11/16 MBF-1-11/16 64592
1-3/4 MBF-1-3/4 64593
1-15/16 MBF-1-15/16 64594
2 MBF-2 64595
2-3/16 MBF-2-3/16 64596
2-1/4 MBF-2-1/4 64597
2-7/16 MBF-2-7/16 64598
2-1/2 MBF-2-1/2 64599
2-11/16 MBF-2-11/16 64600
2-15/16 MBF-2-15/16 64601
3 MBF-3 64602
3-3/16 MBF-3-3/16 64603
3-1/4 MBF-3-1/4 64604
3-7/16 MBF-3-7/16 64605
3-1/2 MBF-3-1/2 64606
A
SQUARE
B
SQUARE
Bore
F
R
J
STANDARD TOLERANCES
Dimensions
P
S
E
L
C
D
Tolerance
1-7/16-1-3/4 +.0010 to –.0000
1-15/16-3-1/2 +.0012 to –.0000
ALL DIMENSIONS IN INCHES
Bore A B C D E
F
R* Approx.
Bolt
J L P Setscrew S Weight
UNF
(Lbs.)
1-7/16 5-1/8 4 11/16 1-37/64 2-5/32 1/2 3-3/4 3/4 1-27/32 5/16-24 1-9/64 5.5
1-1/2 5-3/8 4-1/8 11/16 1-39/64 2-5/32 9/16 3-7/8 3/4 2-3/32 5/16-24 1-3/16 6.0
1-11/16
1-3/4
5-5/8 4-3/8 11/16 1-51/64 2-3/8 9/16 4-1/8 3/4 2-17/64 5/16-24 1-9/32 6.8
1-15/16
2
6-3/8 5-1/8 3/4 1-31/32 2-17/32 5/8 4-1/2 7/8 2-23/32 5/16-24 1-5/16 10.5
2-3/16
2-1/4
6-7/8 5-5/8 3/4 2-1/8 2-29/32 5/8 4-7/8 1 3-1/32 3/8-24 1-9/16 12.1
2-7/16
2-1/2
7-1/8 5-7/8 3/4 2-5/32 3-1/16 5/8 5-3/4 1-3/16 3-27/64 3/8-24 1-3/4 16.4
2-11/16 7-5/8 6 3/4 2-5/16 3-3/16 3/4 5-3/4 1-5/16 3-43/64 3/8-24 1-3/4 20.6
2-15/16
3
7-5/8 6 13/16 2-7/16 3-1/2 3/4 6-1/4 1-5/16 3-7/8 1/2-20 1-15/16 21.4
3-3/16
3-1/4
8-3/8 6-3/4 15/16 2-13/32 3-17/32 3/4 6-7/8 1-11/32 4-3/16 1/2-20 2-1/32 26.7
3-7/16
3-1/2
8-3/8 6-3/4 15/16 2-11/16 3-31/32 3/4 7 1-9/16 4-25/64 1/2-20 2-7/32 20.0
*2 AT 120°
For Load Ratings, See Engineering Section, Page 237.
Replacement Bearings are shown on Page 214.
P-1930-BG 04/10 Boston Gear 800-825-6544 229