ActionJac 2R-MSJ-DC 12:1

Inch Worm Gear Machine Screw Jack, Double Clevis, Reverse Base, 2 Ton Capacity, 12:1 Gear Ratio

Double Clevis Jacks are used when it is necessary to move a load through an arc, such as tracking antennas, hinged doors or air dampers. One clevis is mounted on the end of the lift shaft and the other clevis is welded to a heavy duty stem cover, which is welded to the housing. Depending on size, Double clevis designs are available with optional accessories such as boots, motor mounts, right-angle reducers, motors, encoders and rotary limit switches.


Mounting hardware for double clevis jacks should be specified as heat treated alloy steel clevis pins with at least 100,000 psi ultimate tensile strength.

Double clevis jacks used horizontally will have reduced column strength and life. For most horizontal applications, Nook recommends the use of an Electric Cylinder (contact Nook Engineering for more information).

To configure a part number, download 2D/3D models, or request a quote, please select the "Quote or Download" tab and click the "Configure" button. (Step 4 of 4)

Product ActionJac 2R-MSJ-DC 12:1
Capacity [Ton] 2
Gear Ratio 12:1
Turns of Worm per Inch Travel 48
Torque to Raise 1 lb. [in-lb] 0.0154
Torque to Raise 1 lb. Keyed [in-lb] 0.0177
Lifting Screw Diameter [in] 1.00
Screw Lead [in] 0.250
Root Diameter [in] 0.698
Tare Drag Torque [in-lb] 4
Performance Specifications
Maximum Allowable Input [hp] 1.50
Maximum Input Torque [in-lb] 62
Maximum Worm Speed at Rated Load Non-keyed [rpm] 1525
Maximum Worm Speed at Rated Load Keyed [rpm] 1326
Maximum Load at 1750 RPM Non-keyed [lb] 3486
Maximum Load at 1750 RPM Keyed [lb] 3031
Starting Torque 2 x Running Torque
Base 0 Travel [lb] 15
Per Inch of Travel [lb] 0.45
Grease [lb] 0.5

To continue, please configure your item below.

Jack Accessories - Miter Gearbox

Jack Accessories - Flexible Coupling

Jack Accessories - Line Shafting

Jack Accessories - Handwheel

Jack Accessories - Control Panel