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Small aluminum jaw coupling hub with clamp-on bore

Ruland Manufacturing

Ruland Manufacturing JC16-6-A Jaw Coupling Hub 3/8 in Bore

SKU CH-JB45-3ZNZ9

Aluminium jaw coupling hub with a 3/8 in round bore, clamp-on locking, 1 in outside diameter and 8,000 RPM rating

  • Clamp-on locking secures the hub without a keyway
  • Aluminium hub keeps rotating mass low at 8,000 RPM
  • Curved jaw profile allows angular misalignment while transmitting torque
  • Fail-safe design continues to drive if the elastomer spider fails
  • Bore tolerance +0.002/-0.000 in ensures precise shaft fit

Precision Jaw Coupling Hub for JC16 Systems

This aluminum hub fits JC16 jaw couplings with a 3/8 in round bore and clamp-on shaft locking. It supports speeds up to 8,000 RPM and carries a fail-safe design for reliable power transmission. The bore tolerance is +0.002/-0.000 in for accurate shaft alignment.

Suitable for Light-Duty Inch-Series Drivelines

This hub serves builders assembling or repairing JC16 curve-jaw couplings on 3/8 in shafts where a compact 1 in outside diameter is required. It is not suited for applications needing a keyway connection, metric bores, or coupling sizes other than JC16. Buyers requiring different bore diameters or locking styles must select another hub.

3/8 Inch Round Bore with Clamp-On Locking

The bore diameter and locking method are the critical specifications that determine fit. This hub accepts a 3/8 in round shaft secured by an M3 clamp screw, with a shaft tolerance of +0.0000/-0.0005 in. Verify these dimensions match your shaft exactly before ordering.

How it compares

Measured against everything we stock in Bearings, Belts & Drive Components, at today’s prices. Recalculated every night.

Price $18.99
Cheaper than about 66% of the 693 comparable items (median $35.99).

Specifications

No published specifications for this item yet.

Questions about this item

Which spider insert size matches the JC16 hub for the coupling to work?

Use a JC16 size spider insert; the hub is built for that coupling size and will not mesh with other sizes.

Will the 3/8 in bore clamp onto a shaft held to +0.0000/-0.0005 in tolerance?

Yes, the clamp-on hub is designed for shafts within that tolerance range and the bore tolerance is +0.002/-0.000 in.

How can I confirm the hub is running true after installation?

At up to 8,000 RPM the assembly should run without vibration; check that the clamp screw is tight and the spider seats fully in the curved jaws.

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