Schmidt In-Line Couplings
(L400 Series)

Schmidt Inline Couplings are a torque-rigid type, designed with two pairs of parallel links installed 90 degrees out of phase with each other. This linkage arrangement allows for:

• Precise transmission of torque
• Constant angular velocity between shafts
• Small to moderate parallel misalignments
• Torque Range 500 - 35,000 in-lbs
• Higher torques on special order
• Needle bearings for minimal backlash (zero backlash available)
• Optional filament wound Teflon bearings
for higher torque and no lubrication

Shown with
Standard Hub Configuration


Typical applications which benefit from the high accuracy provided by Schmidt Inline Couplings are feeders, embossers, compactors, printing presses and many others.

 
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How to Select an In-Line Coupling

If you wish, you can use the Sizing Software
which will take your information and automatically
suggest the correct Schmidt Coupling.

1- Use this formula to calculate your required HP/100

2- Look in the performance/dimensions chart for a coupling size which has an HP/100 RPM rating equal or greater than your calculated requirement.

Service Factor Chart:
No shock Load

1.0
Light Shock Load 1.5
Medium Shock Load 2.0
Heavy Shock Load 2.5
Reversing Shock Load 3.0

3- Then determine whether you need zero backlash needle bearings (LC Series).
The non-lubricated filament wound (LD series) has a 20% higher torque capacity.

(Check the Sideloads vs Misalignment chart for more information about sideloads.)

 

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Dimensions and performance data of Inline Couplings up to 1800 RPM

Coupling Designation

L4xxC or L4xxD Series**

L431
C/D		 L442
C/D		 L436
C/D		 L448
C/D		 L463
C/D		 L485
C/D		 L481
C/D		 L411
C/D

Perfor-
mance
Capacity

HP/100 RPM** 0.88 1.35 3.17 5.08 19.04 29.51 36.49 56.49
Torque (in x lb)** 550 850 2000 3200 12000 18600 23000 35600
Dis-
place-
ment*
 Parallel (in) .06 .06 .06 .06 .06 .06 .06 .06
Angular (‚) ±0.5 ±0.5 ±0.5 ±0.5 ±0.5 ±0.5 ±0.5 ±0.5

Coupling
Dimen-
sions

(in)

Disc Diameter D 3.098 4.190 3.613 4.863 6.286 8.475 8.129 10.943
Coupling Length B 3.156 3.156 3.810 3.810 6.373 6.373 7.623 7.623
Disc Width K 0.500 0.500 0.600 0.600 1.187 1.187 1.437 1.437
Center Bore Diameter Z 1.500 1.812 1.625 2.562 2.875 4.000 3.625 5.500
Bolt Circle G 2.412 2.412 3.000 3.000 5.000 5.000 7.000 7.000
No. of Bolts and Size M 3
1/4"-20		 3
1/4"-20		 6
1/4"-20		 6
1/4"-20		 6
1/2"-13		 6
1/2"-13		 8
5/8"-11		 8
5/8"-11

Net Weight (lb)

3.1 5.1 5.6 7.8 32.0 47.0 64.2 93.2
Inertia Wk2 (lb-in2) 6.7 18.6 10.2 29.7 178.7 534.0 604.0 1783
NOTES:  *Data apply to shaft speed under 1800 RPM.  Greater parallel misalignment is possible at lower RPM.  See graph on previous page.  **LC Series Inline Couplings are equipped with needle bearings.  LD Series Inline Couplings are equipped with filament wound teflon bearings for 20% higher torque capacities than shown above.

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The right to make engineering refinements on all products is reserved.
Dimensions and other details subject to change.
When dimensions are critical, detailed drawings should be obtained from the factory.

Send mail to zero-max@zero-max.com with questions or comments about this web site.
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1-800-533-1731 • 763-546-4300 • Fax:763-546-8260

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