Ruland Manufacturing
Ruland Manufacturing JC26-12-A Jaw Coupling Hub 3/4 in Bore
Aluminium jaw coupling hub with 3/4 in bore and clamp-on locking for shafts up to 8,000 RPM
- Clamp-on locking secures shaft without keyway
- Curved jaw profile dampens vibration at 8,000 RPM
- Aluminium hub reduces rotating mass for faster response
- Fail-safe design maintains drive if elastomer fails
- Precision bore tolerance +0.002/-0.000 in ensures true running
Jaw Coupling Hub JC26 3/4 in Bore
This aluminium jaw coupling hub accepts a 3/4 inch round shaft and clamps on with an M4 screw. It belongs to the JC26 size class and carries a 1 5/8 inch hub diameter with an overall length of 2 3/32 inches. The curved jaw profile is designed for general power transmission duty.
Replaces worn or undersized hubs in JC26 assemblies
When an existing hub shows bore wear beyond the +0.002/-0.000 inch tolerance or the clamp screw no longer holds the shaft within +0.0000/-0.0005 inch tolerance, this hub restores full bearing support. The upgrade is worth it if the driveline runs up to 8 000 RPM and the application requires the fail-safe curved jaw design.
Suits maintenance teams standardising
It fits shafts machined to 3/4 inch with a clamp-on locking method and does not rely on a keyway. Buyers needing a different bore diameter, a keyed hub, or a metric-series coupling should look at other models in the range.
Highlights
- Clamp-on locking secures shaft without keyway
- Curved jaw profile dampens vibration at 8,000 RPM
- Aluminium hub reduces rotating mass for faster response
- Fail-safe design maintains drive if elastomer fails
- Precision bore tolerance +0.002/-0.000 in ensures true running
Specifications
No published specifications for this item yet.
Questions about this item
What bore diameter and coupling size does the JC26-12-A hub fit?
The hub has a 3/4 in bore diameter and is sized for JC26 couplings, matching shafts within a +0.0000/-0.0005 in tolerance.
How is the hub secured to the shaft and which screw size is used?
It uses a clamp-on locking method with an M4 screw; the screw must be tightened evenly to avoid distorting the bore.
When should the spider insert be inspected or replaced?
Inspect the curved-jaw spider at regular intervals; replace it if the jaws show cracking, deformation or excessive wear to maintain the fail-safe function.
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