ActionJac 50AB-MSJ-U 10 2/3:1

Inch Worm Gear Machine Screw Jack, Upright Anti-Backlash, 50 Ton Capacity, 10 2/3:1 Gear Ratio

Anti-backlash Machine Screw Jacks are used wherever reversible load conditions require precision positioning control. Adjustable backlash Machine Screw Jack models are available to reduce backlash to approximately 0.003".

An Anti-backlash Machine Screw Jack allows the lash between the drive sleeve thread and the lifting screw thread to be controlled by adjusting the top cover of the jack. The anti-backlash jack design has an upper drive sleeve and a lower drive sleeve. Adjustment of the cover changes the relative distance between the drive sleeves. This change in distance compensates for any lash. Because the drive sleeve is split, the life of an Anti-backlash Machine Screw Jack will be less.

Anti-backlash Machine Screw Jacks minimize backlash, but should not be used to completely eliminate backlash. While it may be desirable to totally eliminate backlash, the result would be a lock-up of lifting shaft and drive sleeve.

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 50AB-MSJ-U 10 2/3:1
Capacity [Ton] 50
Gear Ratio 10 2/3:1
Turns of Worm per Inch Travel 16
Torque to Raise 1 lb. [in-lb] 0.0555
Lifting Screw Diameter [in] 4.50
Screw Lead [in] 0.667
Root Diameter [in] 3.782
Tare Drag Torque [in-lb] 100
Performance Specifications
Maximum Allowable Input [hp] 16.00
Maximum Input Torque [in-lb] 5555
Maximum Worm Speed at Rated Load [rpm] 181
Maximum Load at 1750 RPM [lb] 10382
Starting Torque 2 x Running Torque
Base 0 Travel [lb] 280
Per Inch of Travel [lb] 5.00
Grease [lb] 5.8

To continue, please configure your item below.

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