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Technical Data Sheet

RSA1 3/8 — BEARING UNIT,BALL

✓ Government record, cited
Chief · BALL BEARING
PRODUCT OVERVIEW

RSA1 3/8: BEARING UNIT,BALL.

- Compact design is smaller than the RPA by 1/3 and includes the same great features - Independent roll, pitch and yaw for quick and precise projector registration - Quick connect/disconnect with convenient lamp and filter access on most projectors - Disconnecting maintains registration and doesn't affect preset adjustments - All-Points Security steel-into-steel locking hardware at all connection points protects against theft - Multiple installation options including: flush mount to ceiling, use 0.25" threaded rods, or use a 1.5" NPT column This part is cataloged in the U.S. Government catalog under NSN 3130-00-490-5050, indicating validated use in U.S. government and defense logistics supply chains.

WHERE IT FITS
RSA1 3/8
NSN: 3130-00-490-5050
FSC: 3130 — Bearings, Mounted
CAGE: 21335 — TIMKEN CO DIV THE TIMKEN COMPANY (USA)
SPECIFICATIONS
materialIRON CAST HOUSING
seal_typeLABYRINTH
block_typeFIXED
base_length2.250 INCHES NOMINAL IN
bore_diameter1.375 INCHES NOMINAL IN
housing_width8.250 INCHES NOMINAL IN
seal_locationBOTH ENDS
alignment_typeSELF-ALIGNING
base_thickness0.750 INCHES NOMINAL IN
housing_height4.500 INCHES NOMINAL IN
housing_length1.687 INCHES NOMINAL IN
shaft_end_typeOPEN
NSN3130-00-490-5050
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: RSA1 3/8 · Chief ⚠ 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
•
SEAL TYPE: LABYRINTH
•
LUBRICATION MATERIAL: GREASE
•
LUBRICATION FITTING TYPE: HYDRAULIC
•
ASSEMBLY OVERALL LENGTH: 2.250 INCHES NOMINAL IN
•
HOUSING HEIGHT: 4.500 INCHES NOMINAL IN
•
MOUNTING SLOT LENGTH: 1.250 INCHES NOMINAL IN
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
MOUNTING HOLE TYPE: SLOTTED
TECHNICAL CHARACTERISTICS
SEAL TYPELABYRINTH
LUBRICATION MATERIALGREASE
LUBRICATION FITTING TYPEHYDRAULIC
ASSEMBLY OVERALL LENGTH2.250 INCHES NOMINAL IN
HOUSING HEIGHT4.500 INCHES NOMINAL IN
MOUNTING SLOT LENGTH1.250 INCHES NOMINAL IN
INTERNAL FIT-UP DESIGNATIONSTANDARD
MOUNTING HOLE TYPESLOTTED
ROTATING ELEMENT LOCKING METHODDIRECT
SEAL LOCATIONBOTH ENDS
SUBSTITUTES & CROSS-REFERENCES 2
SP22Reference document
Same NSN cross-reference
Reference document — Secondary reference
PH3U222HSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is RSA1 3/8?
RSA1 3/8 is a BEARING UNIT,BALL manufactured by Chief.
What parts can replace RSA1 3/8?
There are 2 known substitutes for RSA1 3/8: SP22, PH3U222H. Substitute compatibility should be verified for your specific system.
What is the NSN for RSA1 3/8?
RSA1 3/8 is cataloged in the U.S. Government catalog under NSN 3130-00-490-5050. This indicates validated use in U.S. government and defense supply chains.
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