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Part Number 69790492093, Drop-In Center Industrial Coupling Jumbo Hub w/ Rough Stock Bore

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    The DI Type coupling has a “Drop-In” spacer assembly that is assembled at the factory. The coupling consists of two hubs and a spacer assembly comprising of the spacer, two unitized disc packs, and two guard rings. The disc packs are bolted to the spacer and guard rings at the factory using the torque values recommended by Lovejoy for the disc pack bolts. With the hubs mounted on the shafts, the entire disc pack assembly can be “Dropped In” place between the two hubs. The hubs are piloted to ensure proper centering of the spacer assembly. This piloting serves as an anti-flail feature and aids in the coupling’s ability to meet the balance standards mandated by API. This style coupling is designed to meet the balance and anti-flail requirements specified in API-610.

    Oversized, or Jumbo, hubs are available for use with the DI Type coupling to allow for larger bore sizes on most DI coupling sizes. This allows for the use of smaller DI couplings in applications where a smaller size coupling can still accommodate the application torque.





Specifications  · Dimensional Data  · Performance Data  · Features

Specifications

Description 
DI255-6-HUB JUMBO-RSB

Hub Style
Jumbo

Type
Disc Coupling Hubs

Hub Material
AISI 1045

Style
Unbored

Color
Metallic

Bore Type 
Rough Stock Bore

Coupling Series
DI-6

Coupling Type
Disc

Weight
24.00 lb

Weight (Complete Coupling w/ Max. Bores)
159.00 lb


Dimensional Data

Size
255-6

Set Screw Style Coupling Size (Dimension T)
No Setscrew

Length thru Bore
4.530 in
115.06 mm

Overall Length
18.940 in
481.00 mm

Max. Bore (Dimensions ID1/ID2)
6.630 in
170.00 mm

Dimension FD
10.350 in
263.00 mm

Dimension S
5.510 in
140.00 mm

Distance between Shaft Ends (Dimension BSE)
9.880 in
251.00 mm

Cubic inches
485.26493 in³


Performance Data

Nominal Torque
90300.00 in·lb

Max. Torque
180600.00 in·lb

Max. Speed (Unbalanced)
3080.00 rpm

Max. Speed (Balanced)
7700.00 rpm

Axial Misalignment (∆ Ka)
0.185 in

Max. Angular Misalignment
1.00 º

Torsional Stiffness x 106
41.00 in·lb/rad

Rated Power at 100 rpm
143.20 hp
106.80 kW


Features

Features 
  • Designed to meet the API 610 Standard
  • Support for additional API requirements available on request
  • Unitized disc pack
  • Infinite life if properly aligned
  • Torsionally rigid without any back lash
  • No need for lubrication or maintenance
  • No wearing parts and high resistance to harsh environmental conditions


 DOWNLOADS 

Disc Coupling Catalog
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DI Type Disc Coupling Installation Instructions
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