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Steel jaw coupling hub L190 with 1-1/8 inch bore and keyway

Dayton

Dayton 29HY61 Jaw Coupling Hub L190 Steel 1-1/8 in Bore

SKU CH-YTHZ-G2JQT

Steel jaw coupling hub with 1-1/8 in bore, L190 size, rated up to 5,000 RPM and compatible with Buna-N, urethane or Hytrel centre elements

  • Carbon steel hub handles high-torque loads up to 7.4 hp at 100 RPM
  • 5 000 RPM rating keeps drives stable under continuous operation
  • 1-1/8 in bore with 1/4 in keyway fits standard shafts directly
  • Straight jaw profile accepts L190 Buna-N, Urethane or Hytrel spiders
  • Set-screw locking secures hub without extra hardware

Dayton 29HY61 Jaw Coupling Hub

The Dayton 29HY61 is a carbon-steel jaw coupling hub sized L190 with a 1-1/8 inch round bore and keyway. It connects rotating shafts in power-transmission systems using a compatible L190 spider element. The hub is rated for speeds up to 5,000 RPM and transmits 2.7 hp at 100 RPM with a Buna-N spider.

Installation and common issues

The hub uses a set-screw locking method on a straight-jaw profile, so alignment of the keyway and tightening of the screw are the main steps. Misalignment between shafts or an undersized key can cause vibration and premature spider wear. Ensure the set screw seats on the keyway flat to prevent the hub from walking on the shaft.

Compatibility checks before ordering

Verify that your shaft diameter is exactly 1-1/8 inch and that the keyway dimensions match a 1/4 inch width by 1/8 inch depth. Confirm the driven and driving hubs both use the L190 size so the same spider part number L190H, L190N or L190U fits. Check that the 4-1/2 inch outside diameter and 5-1/4 inch overall length clear adjacent components.

Highlights

  • Carbon steel hub handles high-torque loads up to 7.4 hp at 100 RPM
  • 5 000 RPM rating keeps drives stable under continuous operation
  • 1-1/8 in bore with 1/4 in keyway fits standard shafts directly
  • Straight jaw profile accepts L190 Buna-N, Urethane or Hytrel spiders
  • Set-screw locking secures hub without extra hardware

Specifications

No published specifications for this item yet.

Questions about this item

How can I verify the Dayton 29HY61 hub is installed correctly?

After tightening the set screw on the 1-1/8 in bore, confirm the key seats fully in the 1/4 in wide by 1/8 in deep keyway, then rotate the shaft by hand to feel smooth engagement with the L190 spider before applying power.

What comes with the hub and what must I purchase separately?

The package includes the carbon-steel L190 hub with 1-1/8 in bore, keyway and set screw; you must buy a compatible centre element — L190H Buna-N, L190N Urethane or L190U Hytrel — separately.

Which L190 spider should I choose for my application?

Select Buna-N (L190H) for 2.7 hp at 100 RPM general use, Urethane (L190N) for 4.1 hp at 100 RPM better chemical resistance, or Hytrel (L190U) for 7.4 hp at 100 RPM highest torque capacity.

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