- Contact Person : Mr. Kuang Jack
- Company Name : Dongguan Nosen M&E Technology Co., Ltd.
- Tel : 86-769-85644651
- Fax : 86-769-85644652
- Address : Guangdong,Dongguan,Building F,Xinhaoyuan Industrial Park,Xitou Village,Houjie Town
- Country/Region : China
- Zip : 523952
acme screw handwheel
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acme screw handwheel detailed informations:
A hand wheel is a convenient solution for manual operated a screw jack or screw jack systems. When using screw jacks in intermittent positioning applications. Hand wheels are available in a range of diameters from 5 to 12 inches and customized follow clients' need.Hand Wheels do not include a brake. Hand wheels are not recommended for use with ball screw jacks. When using hand wheel with a screw jack that can backdrive an additional locking mechanism may be required to prevent "creep".
For precise position display, a range of digital counters are available for use with screw jacks. These digital counters measure the rotation of the input shaft and display corresponding position in a counter window. The display value per input shaft revolution is variable and is achieved through a series of gear reductions configured to accommodate different jack ratios, lifting screw pitch and travel distances.
Human Force Calculation Formulas:HF=(G*P)/(R1*R2)HF:human force (kgs)G :working load (kgs)P :screw pitch (mm)R1:gear ratio R2:hand wheel radiusExample, working load 50 kgs,the fast speed,manual operated.Check specification table, 50 kgs with manual operated, use the smallest model RN-0.5T(pitch=5mm) enough. Fast speed 1/5.Usually,RN-0.5T jack with 5"(125) diameter hand wheel. How much about human force?HF=(50*5)/(5*62.5)=0.8 kgs.
Every model has three speed ratios.RN-0.5T,RN-1T,RN-2T,RN-3T,RN-5T,RN-10T and RN-15TFast speed: 1 turn 1 mm travelsMid speed: 1 turn 0.5 mm travelsLow speed: 1 turn 0.25 mm travelThe larger models screw jacks are not suitable for manual operated.
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