Zero-max Schmidt Offset Shaft Couplings L253C User Manual download pdf

Form S0234_09/12/11

MOTION CONTROL PRODUCTS

13200 Sixth Avenue North Minneapolis, MN 55441-5509 PHONE (763) 546-4300 FAX (763) 546-8260

TOLL FREE 1-800-533-1731 www.zero-max.com

Mounting and Lubrication Instructions for Schmidt Offset Couplings

For Coupling Models: L234C / L239C / L246C / L253C

The Schmidt Offset Coupling will function properly if these mounting, maintenance and lubrication instructions are

followed. Failure to observe these instructions may result in reduced coupling life.

Mounting Instructions

It is important that the following assembly

dimensions and tolerances are maintained

before and

during coupling operation.

Lubrication Instructions

The Schmidt Offset Coupling should be

lubricated after the first 200 hours of

operation, and again as specified by the

lubrication schedule below.

RPM Under 500 to Over

500 1000 1000

Lube Every Every Every

Cycle 1000 500 200

Hours Hours Hours

Note: Always make certain that the lubrication fittings are

clean before adding lubricant to prevent the introduction of

foreign matter into the bearings. Use standard Alemite

flush-type fitting Z-737. Recommended Lubricant:

Darina

No. 2 (EP) Oil based grease

Position shafts and hubs according to the following values:

1. Hub faces to be parallel within:--------------------------------------------------------Æ

Speeds above 1000 rpm should be .015 inch or less.

Minimizing angular misalignment will allow the coupling bearings to achieve their maximum lifetime.

2. Distance between the hub faces:-----------------------------------------------------Æ

3. Minimum shaft displacement not less than:----------------------------------------Æ

Maximum shaft displacement not to exceed:--------------------------------------Æ

The Schmidt Offset Coupling cannot operate properly outside these limits.

4. Mount coupling between hubs. After installation of the coupling, check that the center disc is free to move laterally a small

amount (approximately .015”-.025”).

5. Tighten hub bolts to the end discs of the coupling.

6. Tighten setscrews in hub. If shock loads are expected, use two set screws per hub.

3.81 +/-.032 inch

0.500 inch

1.800 inch

.025 inch

1 2

Summary of Contents

Page 1

Form S0234_09/12/11 MOTION CONTROL PRODUCTS 13200 Sixth

Page 2

Form S0234_09/12/11 MOTION CONTROL PRODUCTS 13200 Sixth

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