Lovejoy 69790405531 Tapered Grid Standard T-Hub, Size 1100/1100T, 3.9970–3.9985″ Finished Bore (inch), Hub OD 5.59″, Length-Thru-Bore 4.75″, steel grid coupling hub for T-series (use with 1100 grid & cover kit)

Condition: New. Individual hub only (no grid, cover, gasket, hardware, or lubricant included).

Description

This is a Lovejoy Tapered Grid Standard T-Hub for the 1100 / 1100T grid coupling size. It’s a finished-bore inch hub with a precision 3.9970–3.9985 in bore range (nominal 4.000″), engineered for interference/keyed mounting on a standard shaft* in heavy-duty rotating equipment. With a 5.59 in outside diameter and 4.75 in length-thru-bore, it mates to the corresponding 1100 grid element and T-series cover kit to create a lubricated, shock-damping coupling that handles torque spikes and moderate misalignment in pumps, fans, compressors, gearboxes, and conveyors.

*Verify keyway width/depth and fit class against your shaft standard before installation.

Features

• Genuine Lovejoy 1100/1100T hub — matches 1100 grid element and T-series covers
• Finished inch bore: 3.9970–3.9985″ for proper interference on 4.000″ nominal shafts (verify keyway & fit)
• Compact envelope: OD 5.59″, LTB 4.75″ for tight equipment spaces
• Tapered grid interface provides shock absorption and smooth torque transmission
• Steel construction for high strength and durability in industrial duty
• Four-bolt cover system compatibility (typical for T-series) to retain grease and protect the grid
• Field-serviceable: grid and seals can be replaced without moving driver/driver equipment (with proper covers)

Specifications (as provided)

• Brand: Lovejoy
• Part / UPC: 69790405531
• Series: 1100 / 1100T (T-Hub, tapered grid)
• Bore size (inch): 3.9970–3.9985″ (finished)
• Bore type: Finished straight bore, keyed (typical for T-hubs — confirm keyway spec)
• Hub OD: 5.59″
• Length-thru-bore (LTB): 4.75″
• Material: Steel (hub)
• Use with: 1100 grid element, 1100T cover & hardware kit, appropriate grease

Applications / Spheres of Application

• Pumps & compressors (process pumps, chilled water, air compressors)
• Fans & blowers (HVAC supply/return, draft fans)
• Conveyors & mixers (bulk handling, food/process mixers)
• Gearbox & motor connections where shock damping and misalignment tolerance are needed

What This Hub Can Be Part Of (system view)

• Complete Lovejoy T-series grid coupling assembly for size 1100/1100T, comprising:
  • (2) 1100 T-Hubs (this item is one hub)
  • (1) 1100 grid element (spring steel grid)
  • (1) 1100T cover kit with gaskets, hardware, and lube port(s)
  • Approved coupling grease (per Lovejoy recommendations)

Installation Notes (best practice)

• Inspect shaft diameter, keyway, and runout; deburr and clean.
• Heat-mount hub if required for interference fit; align key/keyseat correctly.
• Set spacing between hubs per size-1100 instructions for proper grid seating.
• Pack grid and covers with approved coupling grease; install gaskets/covers evenly.
• Check parallel/angle misalignment and correct to within allowable limits.
• Re-grease and re-inspect per your PM schedule.

Cross-Referenced / Identification

• Lovejoy: 69790405531 (1100 / 1100T T-Hub)
• Often referenced within “1100T” grid coupling kits; confirm your existing grid & cover size before ordering.

Comparable Products (same coupling class — verify size & geometry)

• Rexnord Falk Steelflex® T10/T20 hubs (size-equivalent to 1100; verify interchange)
• TB Wood’s TGS grid hubs (size-equivalent)
• Jaure / SKF, Kop-Flex grid series hubs of equivalent size
  (Form/fit interchange depends on series geometry and cover style; verify before mixing brands.)

Related

lovejoy 1100t hub; tapered grid coupling hub; device to transmit torque with shock damping; 4.000 inch shaft hub; finished bore keyed hub; grid coupling 1100 size; steel hub 5.59 od; 4.75 ltb hub; pump motor coupling hub; fan blower coupling; gearbox coupling component

Common Requests:

1. “Is 69790405531 the correct hub for my existing 1100 grid and T-covers?”
2. “Does this hub include the grid and covers?” (No—hub only.)
3. “What keyway size is supplied with the 3.997–3.9985″ bore?” (Confirm before purchase.)
4. “Can I mix a Lovejoy hub with another brand’s grid/cover?” (Not recommended; verify geometry.)
5. “What grease and fill procedure should I use for the T-series grid coupling?”

Trademarks: Lovejoy® and all other manufacturer names are the property of their respective owners and are used strictly for identification of products and compatibility.

Similar:
Lovejoy 05240 Size 1110 Grid Coupling Hub, Inch, Solid Bore, 10.19″ Overall Coupling Length, 82500 in-lbs Max Torque, with Puller Hole (ad)