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| The screw jack makes it possible to transform the rotary motion provided by a hand wheel, into linear motion that allows push or pull vertical lifting and horizontal positioning. Hand wheels must not be mounted on the drive shaft when not operating the screw jack. | |||||||||
JTW-5T
JACTON
5 tons hand operated screw jack feature: 5 tons static capacity, translating screw configuration, upright mount, gear ratios 1/6, 40mm diameter lifting screw and 7mm screw leads(pitch) as standard, stroke 150mm, clevis end fitting, two input shafts, attached handwheels 300mm diameter, protect tube and bellows boots.
The screw jack makes it possible to transform the rotary motion provided by a hand wheel, into linear motion that allows push or pull vertical lifting and horizontal positioning. Hand wheels must not be mounted on the drive shaft when not operating the screw jack.
Hand wheels are available for Linear Power Jack so that it can be easily used for manual operation. Hand wheels are used for self-lock equipped Linear Power Jacks (Machine Screw Type) only. Because Linear Power Jacks (Ball Screw Type) and Linear Power Jacks (High Lead Screw Type) are not equipped with a self-lock, the input shaft may be reversed by a load, therefore, it is dangerous to use the hand wheel. Hand wheel efficiency is determined by the required torque for a specified load and the diameter of the hand wheel. Also, vibration and shock may cause self-lock failure, in which case a brake unit is recommended.
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
Note: 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 5 tons hand operated screw jack for lifting 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 / Travelling Nut / Safety Nut: 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.
* Motor Flange Adapter: High-strength Casting Motor Adapter, Ductile Iron. Custom Stainless Steel 304 or 316.
* 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
