The Dalton OSDC (Overload Safety Device Coupling) provides overload protection through the use of an OSD unit combined with a roller chain coupling half counterbored to fit the OSD flange. Standard double-width roller chain is used to couple the basic OSD unit and the coupling half.

The OSDC can be set with a torque wrench for maximum load desired. The unit functions as a roller chain coupling until an overload occurs, causing the OSDC to disengage. The device is automatically re-engaged when the overload is eliminated.

FORMULA FOR TORQUE-HORSEPOWER (Foot Pounds)

TORQUE (Foot. Pounds) = (HPx5252)/RPM
HORSEPOWER = (Torque x RPM)/525

In furnishing a coupling half to be used in the "OSDC", care must be taken that a standard cut tooth sprocket is not used. The teeth of the "OSDC" coupling half are cut with a special tooth form to compensate for shaft misalignment.

Important Note:
The "OSDC" overload safety device can be made to suit your application. Send us your blueprints or specifications, for recommendations by our engineering department.
Unit of Measure

Item #

Maximum Torque

OSD Half

Coupling Half

D - Overall Length

List Price

OSDC-131-1/4x1/4 N/A 6 lbs1 mkp N/A 1/4 Inch6.4 mm N/A 1/4 Inch6.4 mm N/A 2 3/8 Inch60 mm $146.00
OSDC-131-1/4x5/16 N/A 6 lbs1 mkp N/A 1/4 Inch6.4 mm N/A 5/16 Inch8 mm N/A 2 3/8 Inch60 mm $146.00
OSDC-131-1/4x3/8 N/A 6 lbs1 mkp N/A 1/4 Inch6.4 mm N/A 3/8 Inch9.6 mm N/A 2 3/8 Inch60 mm $146.00
OSDC-131-1/4x1/2 N/A 6 lbs1 mkp N/A 1/4 Inch6.4 mm N/A 1/2 Inch12.7 mm N/A 2 3/8 Inch60 mm $146.00
OSDC-131-1/4x3/4 N/A 6 lbs1 mkp N/A 1/4 Inch6.4 mm N/A 3/4 Inch19.1 mm N/A 2 3/8 Inch60 mm $146.00
OSDC-131-5/16x1/4 N/A 6 lbs1 mkp N/A 5/16 Inch8 mm N/A 1/4 Inch6.4 mm N/A 2 3/8 Inch60 mm $146.00
OSDC-131-5/16x5/16 N/A 6 lbs1 mkp N/A 5/16 Inch8 mm N/A 5/16 Inch8 mm N/A 2 3/8 Inch60 mm $146.00
OSDC-131-5/16x3/8 N/A 6 lbs1 mkp N/A 5/16 Inch8 mm N/A 3/8 Inch9.6 mm N/A 2 3/8 Inch60 mm $146.00
OSDC-131-5/16x1/2 N/A 6 lbs1 mkp N/A 5/16 Inch8 mm N/A 1/2 Inch12.7 mm N/A 2 3/8 Inch60 mm $146.00
OSDC-131-5/16x3/4 N/A 6 lbs1 mkp N/A 5/16 Inch8 mm N/A 3/4 Inch19.1 mm N/A 2 3/8 Inch60 mm $146.00
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