Dalton Gear Company
Dalton Gear Company
Address: 212 Colfax Ave. N
Minneapolis, MN 55405
Toll-Free: 800-328-7485
Phone: 612-374-2150
Fax: 612-374-2467
E-mail: timw@daltongear.com
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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.

For maximum bore on OSD225, OSD225D, a shallow keyway Is used of 1/2 standard depth. Use the next larger size "OSD" unit when a standard keyway is desired.
Unit of Measure

Specifications

Maximum Torque

 N/A 35 lbs5 mkp

No. of Springs

 N/A 1

OSD Half

 N/A 1/2 Inch12.7 mm

Coupling Half

 N/A 1/2 Inch12.7 mm

Coupling Half No.

 N/A 4020A

OSD Sprocket No.

 N/A 40A20GC

Coupling Chain No.

 N/A D40

For Bore Sizes Not Shown, Add Charge to List Price per Half

 N/A $16.00

A - Diameter

 N/A 3.656 Inch93 mm

B - Length

 N/A 1 1/8 Inch29 mm

C - Length

 N/A 2 Inch51 mm

D - Overall Length

 N/A 2 29/32 Inch74 mm

E - Diameter

 N/A 2 11/16 Inch68 mm

Weight

 N/A 4 lbs1.80 kg