Aurora PNB-T & PNB-TG Series Narrow Spherical Bearings, PTFE Lined Self-Lubricating, 5/16″ to 3/4″ Bore, Plain or Grumman Groove

Aurora PNB-T & PNB-TG Narrow Series Spherical Bearings

Genuine Timken Aurora narrow series spherical bearings, PTFE lined and self‑lubricating. The narrow series carries a narrower ball and race than the wide PWB series for the same bore, giving a more compact envelope where installation space is tight — static radial load capacity to 46,400 lb (206.4 kN) on the -12.

Aurora bearings provide the ultimate in strength, durability, and safety. Aurora spherical bearings are unsurpassed in motorsports, aviation, aerospace, marine, or industrial use!

Bulk pricing

Discounts apply automatically in the cart and can be mixed across any combination of sizes and retention types in this listing — plain and grooved, any bore, all count toward the same total.

• 5 – 19 bearings — 5% off
• 20 or more bearings — 10% off

No code needed; the discount is applied at checkout. Building a full car or stocking a shop? Get in touch for volume pricing beyond these tiers.

Construction

• Ball — alloy steel, heat treated, hard chrome plated
• Race — 17-4 PH stainless steel, heat treated, PTFE lined
• PTFE liner — AT 3200, permanently bonded to the race inside diameter and self‑lubricating

Typical uses and applications

Narrow series spherical bearings are specified wherever a joint must carry high static load through articulation in a compact envelope. Common uses include:

• Motorsports — damper (shock) mounts, bellhousing/gearbox linkages, pushrod and pull rod ends, bellcrank pivots, steering and suspension links
  • Chassis‑specific fitments
    • PNB-5T is used in many damper (shock) connections to bellhousing/gearbox, including on Ligier JS F3 cars
    • PNB-10T is used in Citation chassis wishbones
• Experimental aviation and aerospace — control linkages, actuator rod ends and flight control bellcranks
• Robotics and unmanned systems — articulated joints, gimbals and actuator pivots where maintenance access is limited
• Marine and light industrial — steering linkages, hydraulic cylinder ends and pivoting machinery joints

Plain or Grumman groove

The standard bearing (no “G” suffix) is retained with a circlip or snap ring, not supplied. Where the bearing is staked into the housing, choose the Grumman groove version — the G at the end of the part number — which is swaged in place using a narrow series swaging tool. The groove does not reduce the static load rating, and circlip installations can use either version.

Specifications

All dimensions and load ratings from Timken/Aurora published data. Both plain and grooved variants share identical dimensions and load ratings — the Grumman groove does not reduce the static load rating.