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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.

How it compares

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

Price $75.99
Pricier than about 74% of the 693 comparable items (median $35.99).

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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