Product Overview
Nachi 7314B Single-Row Angular Contact Ball Bearing - 40° Contact Angle, 70mm Bore, Open Steel Cage
Condition
Unused NOS. Sourced from a government research facility. Outer race face stamped NACHI and 7314B; outer ring also stamped JAPAN. Surface patina and light staining visible on outer race exterior. Box marked NACHI-FUJIKOSHI CORP. MADE IN JAPAN with a handwritten reference label; minor crush damage on front lower-left corner edge of box. Races and ball complement show no pitting, scoring, corrosion, or wear.
Carefully packed and shipped same or next business day from our Idaho warehouse. Honest equipment and straightforward service.
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Product Overview
Nachi Fujikoshi 7314B is a single-row angular contact ball bearing designed to carry combined radial and unidirectional axial loads. The "B" suffix designates a 40° contact angle - optimized for applications where axial thrust is the dominant load vector. Bore: 70mm. Outer diameter: 150mm. Width: 35mm. Open configuration; no seals or shields. Pressed steel cage. Manufactured in Japan by Nachi Fujikoshi.
Key Features
- Bore: 70mm | Outer diameter: 150mm | Width: 35mm
- 40° contact angle ("B" suffix) - high unidirectional axial thrust capacity
- Single-row design; open configuration - no seals or shields
- Pressed steel cage construction
- Compatible with DB, DF, and DT paired mounting arrangements and triplex/quadraplex sets
- Universally flush ground rings - pairs without shims or spacers to achieve specified preload or clearance
- Open design supports continuous oil bath or grease lubrication paths
- Limiting speed: 4,300 RPM under continuous oil bath lubrication
- Dynamic load capacity: 118,000 N | Static load capacity: 88,500 N
- Maximum continuous operating temperature: 120°C (248°F)
Applications
- Replacing a failed bearing in a vertical pump motor - removing the worn unit with a press, seating the 7314B, and restoring the shaft to smooth operation before the next production shift
- Rebuilding a gearbox where combined radial and high axial thrust loads eliminated deep-groove bearings as an option - the 40° contact angle handles what a standard ball bearing cannot
- Specifying and procuring bearings for a new machine tool design where paired DB or DF mounting achieves the required spindle preload and rigidity without shims
- Building a spare-parts inventory for manufactured equipment that calls out the 7314B as the OEM bearing specification
- Overhauling industrial rotating equipment in processing facilities where shaft dimensions (70mm bore, 150mm housing) match this bearing's envelope
Frequently Asked Questions
Can this bearing be used alone in an application with axial loads in both directions?
A single 7314B supports axial loads in one direction only. For bidirectional axial thrust, mount two bearings in a DB (back-to-back) or DF (face-to-face) paired arrangement. The universally flush ground rings allow pairing without shims or spacers.
Does this bearing include seals or shields?
No. The 7314B is open on both faces. External lubrication (oil bath or grease) and environmental sealing at the housing level are required.
What shaft and housing dimensions does this bearing require?
70mm shaft bore and 150mm housing inner diameter. Width is 35mm.
Is the "B" suffix significant for sourcing a replacement?
Yes. The "B" suffix specifies the 40° contact angle. Bearings in the 7314 family with different suffixes carry different contact angles and differ in axial load capacity. Confirm the "B" suffix matches your equipment's requirement before ordering.
What is the cage material on this specific bearing?
Pressed steel cage, confirmed by visible markings and research notes.
A bearing that spent years in storage at a government research facility before anyone put a load on it - the races are clean, the balls are unmarked, and the 40° contact angle is ready to do exactly what a vertical pump or a paired spindle set needs. Your machine's next chapter starts here.
