Koyo (JTEKT) J128 — Drawn Cup Needle Roller Bearing (Open Ends), Caged (J Series)

Specifications

• Brand: Koyo (JTEKT)
• Item Number / MPN: J128 (J-128)
• Also Known As: BA128ZOH, SCE128
• EAN / UPC: 605790216879
• Country of Origin: United States
• Category: Needle Roller and Cage Assembly (Drawn Cup Needle Roller Bearing, Open Ends)
• Seal / Closure: Open (No Seal)

Dimensions & Weight

• Bore / Inner Diameter (d): 0.750 in (19.05 mm)
• Outside Diameter (D): 1.000 in (25.40 mm)
• Overall Width (B): 0.500 in (12.70 mm)
• Weight: 0.03 lb (≈ 0.0135 kg)

Design / Construction

• Type: Drawn cup needle roller bearing, open ends
• Series: J Series (caged complement of needle rollers)
• Cage Material: Steel (caged design for accurate roller guidance and high-speed capability)
• Lubrication Hole: No hole
• Precision Rating: Not rated
• Operating Temperature Range: Up to +250°F
• Max RPM: 18,000 rpm
• Standards Met: ANSI/ABMA 18.2, ASTM F2162
• Compatible Inner Ring: IR-88

Overview

Koyo (JTEKT) J128 is a caged drawn cup needle roller bearing with open ends. The steel cage provides strong roller retention and accurate guidance, supporting high-speed operation while maintaining the high load capacity typical of needle roller bearings. The bearing is unsealed/open and is commonly used where compact design and dependable high-speed performance are required.

Typical Applications

Commonly used in compact automotive and industrial assemblies such as:

• Transmissions and gearboxes
• Small power equipment and drives
• General machinery where space is limited and higher RPM capability is needed

   PACKAGE INCLUDES: ONE (1) KOYO Bearing J128 PB L125