Micro Miniature Screw Jacks

Up to 1,000 lbs. capacity. Micro-miniature Screw Jacks have a small footprint, making them suitable for applications where space is limited.

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Anti-backlash Nuts Installed
These small screw jacks are equipped with anti-backlash nuts to minimize vertical backlash between the screw and worm gear nut.
Manual Operation
Accomplished with an easy-to-use hand knob.
Plastic Cover Safeguards Surface
The dial indicator is protected by a removable clear plastic cover.
Precision and Accuracy
Allows for extremely fine and precise adjustment.
Corrosion-Resistant
Available in stainless steel for protection against corrosion, making them ideal for harsh environments like marine or chemical settings.
Standard Models
Equipped with anodized aluminum shell cap and housing with stainless steel worm and lifting screws.
Optional Models
Available with sealed 316 stainless steel shell cap, housing, worm and lifting screw.

Specifications - Micro-Miniature Actuator
Model Number	Rated Capacity	Screw Diameter	Turns of Worm for 1/2 Inch Raise	No Load Torque	Lifting Torque at Full Load	Worm Gear Ratio	Weight	Shell Cap and Housing
B9225MM-xxx	1000 lbs.	.625	500	2 inch - lbs.	18 inch - lbs	20:1	2 lbs	Aluminum
B9225MMS-xxx	1000 lbs.	.625	500	2 inch - lbs.	18 inch - lbs	20:1	3 lbs	Stainless Steel
Note: The load bearings inside stainless steel actuators are not stainless steel. Dimensions are subject to change without notice Part No. SK-3554-46 -Balanced dial reading 0-50-0 in .001" graduations with revolution counter. Part No. SK-3554-83 -Continuous dial reading 0-100 in .001" graduations with revolution counter. (Type of dial must be specified as above when ordering actuator.)

[Brochure] Duff-Norton Product Capabilities Brochure [Catalogs] Mechanical Actuator (Screw Jacks) Design Guide

[Technical Bulletin] Screw Jack Application Analysis Form

[Product Sheet] Micro-minature Actuator Product Sheet