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| In case of power failure, a screw jack can be moved manually operated via a handwheel or crank handle. You can install digital position indicators on the worm shaft of cubic screw jack if you need more precise position display. | |||||||||
JTC50
JACTON
Manual hand crank screw jack 5 ton details such as 5 ton capacity, anti-rotation keyed screw configuration, upright mount, gear ratios 1/7, 40mm diameter lifting screw and 7mm screw leads(pitch) as standard, stroke 350mm, thread end screwed into rod end(set screws fix), right shaft and left shaft, attached handwheels 300mm diameter, rod end bearings, protective pipe and digital counters.
In case of power failure, a screw jack can be moved manually operated via a handwheel or crank handle. You can install digital position indicators on the worm shaft of cubic screw jack if you need more precise position display. It can measure the rotations of the input shaft and display the corresponding position in the digital counter window. The display value per input shaft revolution is variable and is achieved through a series of gear reductions configured to accommodate different worm gear screw jack ratios, screw pitch, and travel length. Easy installation to existing actuators. All hand wheels are bored, keyed, and set-screw drilled to the proper dimensions.
So when to use hand wheel screw jack?
1. In case of power failure, screw jacks can be moved manually via a handwheel. To do this, one input shaft shall be available on the screw jack for connection of the handwheel. If a brake motor is used, the brake shall be un-clamped firstly, so to allow for movement.
2. Light load, low duty cycle, low-speed application.
3. Intermittent positioning applications
4. Acme screw jack since ball screw jack is not self-locking and hand wheels do not include a brake.
Product Material
We use the best materials to guarantee the performance and lifetime of the Manual hand crank screw jack 5 ton you purchased.
* Housing: High-strength Casting Housing, Ductile Iron.
* Lifting Screw: C45 Steel as Standard. Custom Stainless Steel 304 or 316.
* Input Shaft (Worm): C45 Steel in high frequency heat treatment process. Custom Stainless Steel 304 or 316.
* Worm Gear: ZQAl9-4 (Casting aluminum bronze) as Standard. Custom ZCuSn10Pb1(Casting tin bronze).
* Bearing: Anti-friction Ball Thrust Bearings for Worm Gear. Anti-friction Ball Bearings for Input Shaft(worm). Custom Stainless Steel 304.
* Lubricants: Synthetic Grease, Extreme Pressure EP2 Lithium Grease.
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Speficications | Dimensional Drawings | Selection Guide | Catalog
Packaging and Shipping
* 100% standard exporting plywood cases (international exporting standard wooden material with free fumigation).
* Express(Air): Factory to customers' company by FEDEX, DHL, UPS, TNT. Incoterms: EXW, DDU.
* Sea Freight: Factory to destination seaport by Vessel. Incoterms: CIF, FOB, EXW, CFR.
* Air Freight: Factory to destination airport by Airplane. Incoterms: CFR, EXW, FCA, CPT, CIP.
* Additional Options (Door to Door): Train Transportation, Truck Transportation, Ocean Shipping
