L Type – Standard Jaw Coupling

  • Industry’s standard shaft coupling
  • Accommodates for angular and parallel shaft misalignment
  • Fail-safe (will still perform if elastomeric “spider” fails)
  • No metal to metal contact
  • Resistant to oil, dirt, sand, moisture, and grease
  • Industry’s largest available selection from stock
L-Type Jaw Couplings

Resources

Jaw Type Couplings Digital Catalog & 3D CAD

Jaw Type Couplings Catalog (pdf)

Stainless Steel Jaw Sell Sheet (pdf)

L-LOC Clamp Feature Sheet (pdf)

Jaw Coupling Selection Worksheet (pdf)

Installation Instructions & Videos

L-Type Coupling Additional Resources

Click here to access Lovejoy’s Digital Parts Catalog for L line components.

A full L line coupling is comprised of 3 parts:

  • 2 hubs (sintered iron for L035-L150 & cast iron for L190-276)
  • 1 elastomeric spider (SOX/NBR, Urethane, Hytrel®, or Bronze)

Max
Bore

Spider Material
     

SOX (NBR)
Torque

Urethane
Torque

Hytrel®
Torque

Bronze
Torque

Size

in

mm

in-lbs

Nm

in-lbs

Nm

in-lbs

Nm

in-lbs

Nm

L035

0.375

9

3.5

0.4

—

—

—

—

—

—

L050

0.625

16

26.3

3

39

4.5

50

5.6

50

5.6

L070

0.75

19

43.2

4.9

65

7.3

114

12.9

114

12.9

L075

0.875

22

90

10.2

135

15.3

227

25.6

227

25.6

L090

1

25

144

16.3

216

24.4

401

45.3

401

45.3

L095

1.125

28

194

21.9

291

32.9

561

63.4

561

63.4

L099

1.188

30

318

35.9

477

53.9

792

89.5

792

89.5

L100

1.375

35

417

47.1

626

70.7

1,134

128

1,134

128

L110

1.625

42

792

89.5

1,188

134

2,268

256

2,268

256

L150

1.875

48

1,240

140

1,860

210

3,708

419

3,706

419

L190

2.125

55

1,728

195

2,592

293

4,680

529

4,680

529

L225

2.625

65

2,340

264

3,510

397

6,228

704

6,228

704

L276

2.875

73

4,716

533

—

—

—

—

12,500

1412

Note: Bronze has a maximum RPM capability of 250 RPM.

SOX (NBR) Rubber (Standard Insert) – Nitrile Butadiene (Buna N) Rubber is a flexible elastomer material that is oil resistant, resembles natural rubber in resilience and elasticity.

Urethane – Greater torque capability than NBR (1.5 times), provides less dampening effect, and operates in a smaller temperature range. Good resistance to oil and chemicals. Not recommended for cyclic or start/stop applications.

Hytrel® – Flexible elastomer designed for high torque and high temperature operations. Excellent resistance to oil and chemicals. Not recommended for cyclic or start/stop applications.

Bronze – Rigid, porous oil-impregnated metal insert exclusively for low speed (max 250 RPM) applications requiring high torque capabilities. Not affected by extreme temperatures, water, oil, or dirt.

Material

Temperature
Range

Misalignment

Shore
Hardness

Dampening
Capacity

Chemical
Resistance

Color

 

 

Angular

Parallel

      
SOX (NBR) Rubber

-40°F to 212°F
(-40°C to 100°C)

1°

0.015

80A or 60A*

High

Good

Black
Urethane

-30°F to 160°F
(-34°C to 71°C)

1°

0.015

55D or 90-95A**

Low

Very Good

Blue
Hytrel®

-60°F to 250°F
(-51°C to 121°C)

1/2°

0.015

55D

Low

Excellent

Tan
Bronze

-40°F to 450°F
(-40°C to 232°C)

1/2°

0.01

–

None

Excellent

Bronze

* All Sizes (except L035) shore hardness = 80A, Size L035 shore hardness = 60A

** Sizes L050 to L110 shore hardness = 55D, Sizes L150 to L225 shore hardness = 90-95A

Note: In addition to solid center spiders (most common), open center spiders are also available (to allow shafts of the driver and driven to be positioned within a short distance). Open center spiders offer shaft positioning flexibility but have a lower RPM capacity (1,750 RPM maximum for NBR, 3,600 maximum for Urethane and Hytrel®).

Please Note: CAD Files are located in the digital catalog.

For additional documentation (in PDF form), please download the Jaw Coupling catalog (pdf) or contact Lovejoy customer service.