Uniflex Coupling

The Uniflex coupling is an all steel, single piece coupling that solves a variety of application concerns including: high misalignment, space limitations, high temperature, and exceptionally low backlash/windup. The unique flexing center of the Uniflex consists of three opposingly wound square wire springs for forward or reverse operation. Two steel hubs are then brazed to the steel spring pack to create a durable one-piece flexible coupling.

  • Flexible triple wound spring design coupling
  • Addresses high misalignment, space limits, high temps, & has low backlash/windup
  • Smaller and lighter than most couplings of comparable torque ratings
  • Applications include: textile equipment, printing and binding registration, robotics/positioning, conveyors, carton folding and gluing equipment, machine tools, centrifugal pumps, agricultural machinery, blowers, winding machines, and steering mechanisms
Uniflex Coupling

Uniflex Coupling Additional Resources

Features

  • Compensates for high degrees of misalignment (up to 4.5° angular, up to .045 inches parallel)
  • One piece, simple to install – nothing to replace, no wearing parts, & no lubrication
  • Well suited for applications with inaccessible mounting locations
  • All metal design – can be used in applications with severe environmental concerns
  • Standard couplings withstand temperatures to 250°F (due to soldering); special designs to 600° F (stainless steel w/electron beam weld)
  • Unaffected by oil, grease, dirt and most industrial chemicals

U Type

This is a durable one-piece flexible coupling for general purpose shaft-to-shaft applications. It is the basis for all Uniflex coupling types.

RRU Type

This design offers “quick disconnect” for drop out requirements. It can also accommodate a slightly larger shaft diameter than the standard U Type.

UF Type

This flange-to-flange type is designed to connect flange mounted equipment to another flange while compensating for misalignment. It is also the center drop out section of the RRU Type.

UFH Type

A flange-to-shaft configuration, this couples flange mounted equipment to a shaft with all the benefits of Uniflex versatility. The stock flange plate is the same as used on the UF Type.

Wind
Up

Misalignment Capability

 

at Max

Max
Angular

Max Parallel
Offset

Max Rec
End Play

Max
Torque

HP/100

Max
Speed

Size

Torque*

Offset

in

mm

in

mm

in-lb

Nm

RPM

RPM

18 Reg

1.80°

3.0°

0.008

0.20

0.010

0.25

18

2.0

0.03

30,000

25 Reg

1.80°

4.5°

0.011

0.28

0.020

0.51

34

3.8

0.05

30,000

37 Reg

1.78°

4.5°

0.014

0.36

0.020

0.51

39

4.4

0.06

30,000

50 Reg

1.82°

4.5°

0.021

0.53

0.035

0.89

82

9.3

0.13

30,000

62 Reg

0.85°

3.0°

0.019

0.48

0.035

0.89

126

14.2

0.20

20,000

75 Reg

1.82°

4.5°

0.028

0.71

0.040

1.02

175

19.8

0.28

20,000

87 Reg

1.68°

4.5°

0.035

0.89

0.040

1.02

346

39.1

0.55

10,000

100 Reg

1.03°

3.0°

0.030

0.76

0.040

1.02

565

63.8

0.90

6,000

125 Reg

1.85°

4.5°

0.044

1.12

0.040

1.02

755

85.3

1.21

6,000

137 Reg

1.85°

3.0°

0.035

0.89

0.040

1.02

1,260

142.4

2.02

6,000

150 Reg

0.85°

3.0°

0.041

1.04

0.040

1.02

1,890

213.5

3.02

3,000

25 Short

1.07°

3.0°

0.007

0.18

0.015

0.38

34

3.8

0.05

30,000

37 Short

1.09°

3.0°

0.009

0.23

0.015

0.38

39

4.4

0.06

30,000

50 Short

1.05°

3.0°

0.014

0.36

0.010

0.25

82

9.3

0.13

30,000

62 Short

0.85°

3.0°

0.019

0.48

0.020

0.51

126

14.2

0.20

20,000

75 Short

1.12°

3.0°

0.019

0.48

0.020

0.51

175

19.8

0.28

20,000

87 Short

1.17°

3.0°

0.024

0.61

0.020

0.51

346

39.1

0.55

10,000

100 Short

1.03°

3.0°

0.030

0.76

0.020

0.51

565

63.8

0.90

6,000

125 Short

1.22°

3.0°

0.030

0.76

0.020

0.51

755

85.3

1.21

6,000

137 Short

1.35°

3.0°

0.350

0.89

0.020

0.51

1,260

142.4

2.02

6,000

150 Short

0.85°

3.0°

0.041

1.04

0.020

0.51

1,890

213.5

3.03

3,000

Note: * Total backlash is approximately 1/3 of windup at max torque – consult Lovejoy Engineering for more information.

Please see downloadable Specialty Products catalog for dimensional data.

For other coupling types: see Coupling Preselection Guide