Timken
Timken 4-Bolt Flange Bearing 1" Bore SCJ 1
Cast-iron square flange bearing with 1" cylindrical bore, double-sealed radial ball insert, and four-hole mounting for fixed-position shafts
- Double-sealed protection keeps contaminants out
- Cast iron housing delivers rigid four-bolt mounting
- Alloy steel insert handles 520 RPM operation
- NLGI #2 grease works from -65 to 200 °F
- 1-inch cylindrical bore fits standard shafts
4-Bolt Flange Bearing with 1" Bore
This Timken bearing unit combines a cast-iron square housing with a radial ball insert for fixed-position shaft support. The 1-inch cylindrical bore fits standard shafts directly, while the double-sealed design retains lubricant and excludes contaminants in industrial machinery applications.
Thermals and Speed Range
Factory-filled with NLGI #2 equivalent grease, the bearing operates continuously from minus 65 degrees F to 200 degrees F. The fixed expansion type handles radial loads at speeds up to 5,520 RPM without external cooling, keeping friction low in normal service.
Cast-Iron Housing and Mounting
Four bolt holes on a 2 3/4-inch center-to-center pattern secure the square flange to flat surfaces, and the 0.409-inch back-side width allows close spacing. The GYA100RRB insert is included, so installation requires only a shaft and fasteners.
Highlights
- Double-sealed protection keeps contaminants out
- Cast iron housing delivers rigid four-bolt mounting
- Alloy steel insert handles 520 RPM operation
- NLGI #2 grease works from -65 to 200 °F
- 1-inch cylindrical bore fits standard shafts
Specifications
| Brand | Timken |
|---|
Questions about this item
How do I mount the 4-bolt flange bearing and what is the common alignment error?
Bolt the square cast-iron housing using the four holes on a 2 3/4 in center-to-center pattern; the step most installers miss is shimming the mounting surface so the 1 in cylindrical bore stays perfectly perpendicular to the shaft.
What maintenance will the double-sealed radial ball insert need and when should I plan replacement?
The GYA100RRB insert is factory-filled with NLGI #2 equivalent grease and double-sealed, so no re-lubrication is required; replace the unit if seal damage, abnormal noise or excess radial play appears during inspection.
Which limit — speed or temperature — will I reach first during continuous operation?
The 5,520 RPM maximum speed is typically reached before the 200 °F temperature ceiling in sustained use, so monitor shaft speed as the primary constraint.
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