Torrington NA4830A.JS3.C3.S1 Needle Roller Bearing 150x190x40mm Heat Stab NOS

Torrington NA4830A.JS3.C3.S1 — Machined Needle Roller Bearing with Inner Ring

Brand: Torrington (Genuine — USA Made) Part Number: NA4830A.JS3.C3.S1 Condition: NOS — New Old Stock, factory-new and unused

IMPORTANT: This listing is for ONE (1) bearing. The photo may show multiple bearings for reference, but only one bearing will be shipped per purchase. Order the quantity you need.

WHAT IT IS

This is a large machined-ring needle roller bearing with an integrated inner ring, in a heat-stabilized specialty configuration. The "A" design variant features specific internal geometry; the "JS3" suffix denotes a controlled radial internal clearance falling within the C3 (greater than normal) range, manufactured to tighter tolerance; and the "S1" suffix indicates dimensional stabilization for sustained operation at elevated temperatures up to approximately 200°C.

Needle roller bearings deliver exceptionally high radial load capacity in a compact cross-section, making them essential where space is limited but radial loads are heavy. The included inner ring allows installation on shafts that have not been hardened or ground.

This is a specialty bearing, NOT a standard NA4830 — verify the JS3.C3.S1 specification matches your application requirements.

GENUINE TORRINGTON — MADE IN USA

This is original-production Torrington-branded inventory from before The Torrington Company was acquired by Timken in 2003 and the needle bearing division was later sold to JTEKT/Koyo in 2011. Torrington was a 137-year-old American bearing manufacturer based in Torrington, Connecticut — known for precision needle roller bearings used throughout American industry, agriculture, aerospace, and defense applications. Genuine Torrington NOS is the original American-made article, increasingly hard to find as factories have shifted production overseas.

SPECIFICATIONS

• Bore (inner diameter): 150 mm
• Outer diameter: 190 mm
• Width: 40 mm
• Bearing type: Machined needle roller with inner ring (NA series)
• Internal clearance: JS3 (controlled C3-range, tighter tolerance)
• Heat stabilization: S1 (rated to approximately 200°C)
• Cage: Steel, machined
• Outer ring: Lubrication groove and oil hole standard
• Bearing weight: Approximately 7 lbs (3.2 kg)

COMMON APPLICATIONS

This bearing is used in heavy-duty industrial applications where high radial loads, compact cross-sections, and elevated operating temperatures coexist: heavy gearboxes and reducers, paper and steel mill machinery, hot-rolling equipment, automotive and truck transmissions in high-load configurations, agricultural and construction equipment, mining gearboxes, and high-temperature pump and compressor applications.

CROSS-REFERENCES / SUPERSEDES

The JS3.C3.S1 specification crosses between Torrington and FAG under the same designation. Post-acquisition equivalents: Timken NA4830A.JS3.C3.S1, Koyo NA4830A. Related cross-references from other manufacturers: INA NA4830-XL-C3, SKF NA 4830, IKO NA4830, NSK NA4830, NTN NA4830. Note that base NA4830 references without the JS3.S1 suffixes do NOT have the same controlled clearance and heat stabilization — they are not direct equivalents for applications that specifically require this spec.

CONDITION DETAILS

This is genuine Torrington New Old Stock — original American-made production. The bearing is factory-new, unused, and in full working condition. Original packaging may show shelf wear, dust, or minor cosmetic flaws from long-term storage.

RETURNS

30-day return policy. If you're not satisfied for any reason, you may open a return request through eBay within 30 days of purchase.

Please verify this part number, dimensions, and full specification (including JS3 clearance and S1 heat stabilization) match your application before purchasing. If you have questions, message us before buying — we're glad to help!