Modified Stock Gearing - Boston Gear

Mounted Ball Bearings
SF/ST Series
Flanged Units – Standard Duty; Extended Inner Race – Setscrew Locking
SF Series 4-Bolt
ST Series 2-Bolt
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 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
4-BOLT
2-BOLT
Bore Catalog Item Catalog Item
Number Code Number Code
1/2 SF-1/2 64736 ST-1/2 64723
5/8 SF-5/8 64737 ST-5/8 64724
3/4 SF-3/4 64738 ST-3/4 64725
7/8 SF-7/8 64739 ST-7/8 64726
15/16 SF-15/16 64740 ST-15/16 64727
1 SF-1 64741 ST-1 64728
1-1/8 SF-1-1/8 64742 ST-1-1/8 64729
1-3/16 SF-1-3/16 64743 ST-1-3/16 64730
1-1/4S SF-1-1/4S 64744 ST-1-1/4S 64731
1-1/4 SF-1-1/4 64745 ST-1-1/4 64732
1-5/16 SF-1-5/16 64746 ST-1-5/16 64733
1-3/8 SF-1-3/8 64747 ST-1-3/8 64734
1-7/16 SF-1-7/16 64748 ST-1-7/16 64735
1-1/2 SF-1-1/2 64749 — —
1-5/8 SF-1-5/8 64750 — —
1-11/16 SF-1-11/16 64751 — —
1-3/4 SF-1-3/4 64752 — —
1-15/16 SF-1-15/16 64753 ST-1-15/16 50696
2 SF-2 64754 — —
2-3/16 SF-2-3/16 64755 — —
2-1/4 SF-2-1/4 64756 — —
2-7/16 SF-2-7/16 64757 — —
Replacement Bearings are shown on Page 214.
P-1930-BG 04/10 Boston Gear 800-825-6544 227