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Dayton L190 jaw coupling hub steel 1-3/8 inch bore

Dayton

Dayton 29HY63 L190 jaw coupling hub steel 1-3/8" bore

SKU CH-GQ54-J4ZHH

Connects two shafts with a 1-3/8 inch bore, carbon steel hub and set-screw locking for up to 5,000 RPM

  • L190 jaw coupling hub fits 1-3/8" shafts with keyway
  • Carbon steel construction rated for 5,000 RPM maximum speed
  • Transmits 2.7 hp at 100 RPM with Buna-N spider element
  • Set-screw locking provides secure shaft attachment without additional hardware
  • Compatible with L190H, L190N and L190U center elements for flexible replacement

L190 steel hub for inch shafts

The Dayton 29HY63 is a carbon-steel jaw coupling hub sized L190 with a 1-3/8 inch round bore and standard keyway. It accepts a set screw for shaft locking and mates with L190 Buna-N, urethane or Hytrel center elements. The hub is rated to 5,000 RPM and suits general power-transmission duties.

Fits L190 elements and standard keyed shafts

The straight-jaw profile aligns with L190H, L190N and L190U spiders, so the same hub works with three spider materials. A 5/16 inch keyway width and 5/32 inch depth match common inch-series key stock, letting the hub slide onto prepared shafts without machining. Set-screw locking avoids the need for clamp collars or shrink fits.

Torque capacity varies by spider choice

At 100 RPM the hub transmits 2.7 hp with a Buna-N spider, 4.1 hp with urethane and 7.4 hp with Hytrel, giving a clear upgrade path for higher torque. The 5,000 RPM ceiling limits high-speed applications, and the fixed 1-3/8 inch bore means a different hub is required for other shaft diameters.

Highlights

  • L190 jaw coupling hub fits 1-3/8" shafts with keyway
  • Carbon steel construction rated for 5,000 RPM maximum speed
  • Transmits 2.7 hp at 100 RPM with Buna-N spider element
  • Set-screw locking provides secure shaft attachment without additional hardware
  • Compatible with L190H, L190N and L190U center elements for flexible replacement

Specifications

No published specifications for this item yet.

Questions about this item

What is the maximum speed the L190 hub can handle before it becomes a limit?

The hub is rated for 5,000 RPM, which is the highest speed it should run at continuously.

How much heat or power loss should I expect when the coupling runs all day at 100 RPM with a Buna-N spider?

At 100 RPM the Buna-N spider transmits 2.7 hp; any power above that turns into heat inside the element.

Which centre element part numbers must I already have to make this hub work?

You need a compatible L190H, L190N or L190U spider; the hub alone cannot transmit torque.

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