Jaw type couplings have a specific use, it is a coupling that if it fails will keep running, without damage to equipment until it can be replaced it also can only run at up to 2 degrees out of alignment.

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Jaw type couplings have a specific use, it is a coupling that if it fails will keep running, without damage to equipment until it can be replaced it also can only run at up to 2 degrees out of alignment. It is mainly used as its components dont need maintenance and keeps working if its internal insert fails. The “jaws” then clamp together to keep the coupling in motion but that leads to an immediate increase of vibration due to having no insert to absorb that vibration. Made up of 2 hubs (input and output connectors) and internal “spider” to absorb shock and misalignment, which means the more the misalignment the quicker it wears. These elastomeric couplings are used in high speed low torque applications, motors pumps are the main markets.

BOSTON GEAR FC-15-1/2 SHAFT COUPLING

Boston Gear FC15 1/2
Steel FC Coupling, Size 15, 1/2 in. Bore
MFR #FC15 1/2

Boston Gear FC20-1

Boston Gear FC20-1/2 Jaw coupling hub

RPM [MAX] 1800 rpm
LENGTH THROUGH BORE 1.57 in
OUTSIDE DIA. 2 in
KEYWAY SIZE 1/8 x 1/16
LOCK TYPE Setscrew
COUPLING SIZE FC20
MATERIAL Steel
HUB DIA. 1 3/4 in
WEIGHT 1.181 LB
EAN OR UPC 781711082584

Boston Gear FC20-15/16

Boston Gear FC20-3/4 Shaft Coupler Body

Size - Jaw Couplings FC20
Bore Dia. 3/4 in
Keyway Size Type 3/16 in x 3/32 in
Material - Hubs Steel
Outside Dia. 2 in
Assembled Coupling Length 3.69 in
Overall Length 3.69 in
UNSPSC 31163003
Product Description
Steel Jaw Coupling Hubs connect to drive shafts to provide dependable power transfer in high-temperature applications. A complete assembly requires two hubs and one jaw coupling spider, available separately.

5/8″1 1/8″1 7/16″2″3 11/16″1 3/4″1 1/8″4 13/16″

Boston Gear FC20-7/8 Jaw coupling hub

Series      : FC Series
Coupling Size      : FC20
Bore Diameter      : 7/8 in
Hub Diameter      : 1-3/4 in
Hub Length      : 1-1/8 in
Keyway Size      : 3/16 x 3/32 in
Maximum Speed      : 1750 rpm
Length Through Bore      : 1-4/16 in
Screw Size      : 5/16-18
Material      : Steel

Boston Gear FC20-9/16 Jaw coupling hub

  • Size - Jaw Couplings: FC20
  • Keyway Size Type: 1/8 in x 1/16 in
  • Material - Hubs: Steel
  • Outside Dia.: 2 in
  • Assembled Coupling Length: 3.69 in
  • Keyway Size: 1/8" x 1/16"
  • Overall Length: 3.69 in

Boston Gear FC45 2 Steel FC Coupling

PRODUCT DETAILS
  • Size FC45 Coupling Hub
  • 2" Bore
FEATURES
  • No lubricant required
  • Complete with keyway and setscrew
  • Precision machined
MFR # FC45 2 HALF HUB 08310

BOSTON GEAR SSFC12 Jaw Coupling Hub

  • Size - Jaw Couplings: SSFC12
  • Keyway Size Type: 1/8 in x 1/16 in
  • Material - Hubs: Stainless Steel
  • Outside Dia.: 1.25 in
  • Assembled Coupling Length: 2.31 in
  • Overall Length: 2.31 in
  • Size: SSFC12

BOSTON GEAR SSFC20 7/8 Jaw Coupling Hub w KW

Size - Jaw Couplings SSFC20
Bore Dia. 7/8 in
Keyway Size Type 3/16 in x 3/32 in
Material - Hubs Stainless Steel
Outside Dia. 2 in
Assembled Coupling Length 3.69 in
Overall Length 3.69 in
Manufacturer UPC Number 884107384238

Boston Gear SSFC20 SOLID Jaw Coupling Hub

Key Features
  • Item - Jaw Coupling Hubs: Jaw Coupling Hub
  • Size - Jaw Couplings: SSFC20
  • Keyway Size Type: None
  • Material - Hubs: Stainless Steel
  • Outside Dia.: 2 in
  • Assembled Coupling Length: 3.69 in
  • Material: Stainless Steel
  • Overall Length: 3.69 in