FAQ-Keeist Machinery & Electricity Co.,Ltd.

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	Frequently Asked Questions
KEEIST MACHINERY & ELECTRICITY CO.,LTD.

	1.What are the main area of your linear actuator used? The linear actuators we manufacture are widely used in Medical bed,nurse care bed,sofa and table. 2. What Type of material do the linear Actuators Use ? The material of our linear actuators main have two types: stainless steel and aluminium alloy. Stainless steel is our first choise,it is more stable , safe and long life, aluminium alloy is more cheap.

	3. What is the Duty Cycle Capability of a Linear Actuator ? Duty cycle rating for a linear actuator is generally expressed as a percentage of "on time" (the ratio of on time to total time) or as distance travelled over a period of time. may also be expressed as a percentage, The duty cycle rating is 10% in our linear actuators.Duty cycle and continuous duty ratings of the actuator should not be exceeded. To do so could cause damage to the unit thus voiding any warranty on the motor. When considering the duty cycle of the unit the life of the actuator should also be considered.

	4. What are the Common Factors in the Failure of a Linear Actuator ? Improper loading, failure to set limit switches excessive duty and extreme environments may contribute to premature actuator failure.

5. Are the linear Actuators Have Limit Switches ?
Our linear actuators can be supplied with limit switches.Limit switches are not pre-set on actuators. Limit switches allow you the flexibility to set the limits of travel on your actuator to fit your particular application. Easy to follow instructions are included in the installation manual, consult Power Jacks if further assistance is required. The customer is responsible for properly setting the limit switch in the unit. If the limit switches are not set, or are improperly set, the unit may be damaged during operation. In addition, limit switches may require resetting if the translating tube of your actuator is rotated manually, as this will change the limit switch setting.

6. Are Clutches Available on the Linear Actuators ?
Clutches / torque limiters are available on Keeist linear actuators whether as a standard option or a custom design.
The friction clutch in these actuators is set to slip when the rated load limit of the actuator is exceeded. This is to prevent damage to the actuator due to jamming or over-heating resulting from an excessive load. The load will be held securely should the clutch slip. The clutch also allows end of travel protection, but is not designed to be slipped repeatedly.

Any question please contact us: Email: keeist@gmail.com , ningbo55@gmail.com

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