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A Series Close-coupled Arrangement

Close-coupled Wrap-fit Urethane Element Coupling

John Crane A Series couplings provide a solution to one of the most persistent and troublesome problems facing maintenance personnel: periodic coupling failure and the downtime and expenses that go with it. If a new insert is needed, a placement can be installed in minutes, without moving either the prime mover or the driven equipment.

The A Series is the simplest construction of all our couplings. The arrangement consists of two close-coupled hubs which have six or eight teeth, depending on size. These components are made of quality carbon steel. The split insert, which is made of specially compounded urethane, fits over the hub teeth. The retaining ring is made of steel and is located with two setscrews.

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  • California Residents: PROPOSITION 65 WARNING
  • Easy to install.
  • Urethane insert is resistant to most chemicals and oils.
  • No lubrication or maintenance.
  • Can rotate hubs independently for motor test.
  • No metal-to-metal contact.
  • Large bore and torque capacity.
  • High misalignment capability.
  • Hubs can be supplied either finish machined or with blank bores.
  • Horizontal and vertical operations, in either direction.
  • Excellent power-to-weight ratio.
  • The coupling requires no nuts or bolts.
  • Change-out of coupling insert is faster than any other coupling.


Maximum Shaft


Maximum Torque

21,000Nm (185,300 lbf/in)

Speed Limits

9600 rpm

Temperature Limits

Standard insert: -40°F to 180°F/-40°C to 80°C

High-temperature inserts: 300°F/150°C

Recommended Applications

  • Process pumps
  • Mixer and agitators
  • Electric motors
  • Gearboxes
  • Driven machinery
  • Other rotating equipment
Works With
Type 5610/5610Q/5610L Type 5610/5610Q/5610L
Type 5620/5620P Type 5620/5620P
Similar Products
L Series L Series

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