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Technical Data Sheet

RCJ1 1/4 — HOUSING,BEARING UNIT

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

RCJ1 1/4: HOUSING,BEARING UNIT.

The HOUSING,BEARING UNIT is a the manufacturer industrial component. Key specifications include material: IRON CAST OVERALL, bore_diameter: 2.1875 INCHES NOMINAL IN, housing_width: 4.625 INCHES NOMINAL IN, housing_length: 1.469 INCHES NOMINAL IN, flange_thickness: 0.656 INCHES NOMINAL IN, style_designator: FLANGE BLOCK. This part is cataloged in the U.S.

Government catalog under NSN 3130-01-253-5979, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
RCJ1 1/4
NSN: 3130-01-253-5979
FSC: 3130 — Bearings, Mounted
CAGE: 21335 — TIMKEN CO DIV THE TIMKEN COMPANY (USA)
SPECIFICATIONS
materialIRON CAST OVERALL
bore_diameter2.1875 INCHES NOMINAL IN
housing_width4.625 INCHES NOMINAL IN
housing_length1.469 INCHES NOMINAL IN
flange_thickness0.656 INCHES NOMINAL IN
style_designatorFLANGE BLOCK
mounting_hole_typeROUND, UNTHREADED
lubrication_materialGREASE
mounting_hole_diameter0.516 INCHES NOMINAL IN
assembly_overall_length2.125 INCHES NOMINAL IN
lubrication_fitting_typePIPE PLUG
lubrication_fitting_angle_from_horizontal_centerline45.0 DEGREES NOMINAL
NSN3130-01-253-5979
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: RCJ1 1/4 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
LUBRICATION MATERIAL: GREASE
•
LUBRICATION FITTING TYPE: PIPE PLUG
•
ASSEMBLY OVERALL LENGTH: 2.125 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.656 INCHES NOMINAL IN
•
MOUNTING HOLE TYPE: ROUND, UNTHREADED
•
STYLE DESIGNATOR: FLANGE BLOCK
•
MOUNTING HOLE DIAMETER: 0.516 INCHES NOMINAL IN
•
HOUSING WIDTH: 4.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
LUBRICATION MATERIALGREASE
LUBRICATION FITTING TYPEPIPE PLUG
ASSEMBLY OVERALL LENGTH2.125 INCHES NOMINAL IN
FLANGE THICKNESS0.656 INCHES NOMINAL IN
MOUNTING HOLE TYPEROUND, UNTHREADED
STYLE DESIGNATORFLANGE BLOCK
MOUNTING HOLE DIAMETER0.516 INCHES NOMINAL IN
HOUSING WIDTH4.625 INCHES NOMINAL IN
BORE DIAMETER2.1875 INCHES NOMINAL IN
MATERIALIRON CAST OVERALL
OTHER ITEMS IN FSC 3130 — Bearings, Mounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3130-00-001-5118 3130-00-001-5137 3130-00-001-6585 3130-00-003-0422 3130-00-003-0455 3130-00-003-0794 3130-00-003-2802 3130-00-003-9535
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is RCJ1 1/4?
RCJ1 1/4 is a HOUSING,BEARING UNIT.
What is the NSN for RCJ1 1/4?
RCJ1 1/4 is cataloged in the U.S. Government catalog under NSN 3130-01-253-5979. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.