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W1978PC5677 — RECEIVER-TRANSMITTER,RADIO

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

W1978PC5677: RECEIVER-TRANSMITTER,RADIO.

The RECEIVER-TRANSMITTER,RADIO is a the manufacturer industrial component. Key specifications include material: STEEL COMP E51100 OR STEEL COMP E52100 OVERALL, alignment_type: RIGID, overall_height: 0.5575 INCHES MINIMUM AND 0.5675 INCHES MAXIMUM IN, surface_finish: GROUND, style_designator: FLAT RACE SURFACE, STAGGERED BALL RETAINER, bore_smallest_diameter: 0.5040 INCHES MINIMUM AND 0.5060 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-155-9143, 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
W1978PC5677
NSN: 3110-00-155-9143
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 55509 — COOPER CAMERON CORP AJAX-SUPERIOR DIV (USA)
SPECIFICATIONS
materialSTEEL COMP E51100 OR STEEL COMP E52100 OVERALL
alignment_typeRIGID
overall_height0.5575 INCHES MINIMUM AND 0.5675 INCHES MAXIMUM IN
surface_finishGROUND
style_designatorFLAT RACE SURFACE, STAGGERED BALL RETAINER
bore_smallest_diameter0.5040 INCHES MINIMUM AND 0.5060 INCHES MAXIMUM IN
overall_outside_diameter1.2168 INCHES MINIMUM AND 1.2188 INCHES MAXIMUM IN
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
thrust_directional_capability_designationSINGLE
NSN3110-00-155-9143
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: W1978PC5677 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: FLAT RACE SURFACE, STAGGERED BALL RETAINER
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
THRUST DIRECTIONAL CAPABILITY DESIGNATION: SINGLE
•
OVERALL OUTSIDE DIAMETER: 1.2168 INCHES MINIMUM AND 1.2188 INCHES MAXIMUM IN
•
BORE SMALLEST DIAMETER: 0.5040 INCHES MINIMUM AND 0.5060 INCHES MAXIMUM IN
•
ALIGNMENT TYPE: RIGID
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.5575 INCHES MINIMUM AND 0.5675 INCHES MAXIMUM IN
SURFACE FINISHGROUND
STYLE DESIGNATORFLAT RACE SURFACE, STAGGERED BALL RETAINER
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
THRUST DIRECTIONAL CAPABILITY DESIGNATIONSINGLE
OVERALL OUTSIDE DIAMETER1.2168 INCHES MINIMUM AND 1.2188 INCHES MAXIMUM IN
BORE SMALLEST DIAMETER0.5040 INCHES MINIMUM AND 0.5060 INCHES MAXIMUM IN
ALIGNMENT TYPERIGID
MATERIALSTEEL COMP E51100 OR STEEL COMP E52100 OVERALL
SUBSTITUTES & CROSS-REFERENCES 9
A2101Reference document
Same NSN cross-reference
Reference document — Secondary reference
2C193PC5677Reference document
Same NSN cross-reference
Reference document — Secondary reference
KAFIRReference document
Same NSN cross-reference
Reference document — Secondary reference
1107RB3Reference document
Same NSN cross-reference
Reference document — Secondary reference
FT1Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS17162-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is W1978PC5677?
W1978PC5677 is a RECEIVER-TRANSMITTER,RADIO.
What parts can replace W1978PC5677?
There are 9 known substitutes for W1978PC5677: A2101, 2C193PC5677, KAFIR and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for W1978PC5677?
W1978PC5677 is cataloged in the U.S. Government catalog under NSN 3110-00-155-9143. This indicates validated use in U.S. government and defense supply chains.
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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.