Q&A   Linear Actuators

The following is the list of answers for frequently asked questions from our customers. Click the question and see the answer.

Power Cylinder

Q1 Is the Power Cylinder environmentally friendly?
Q2 Are the products compliant with the RoHS directive?
Q3 What is the greasing interval for the Power Cylinder?
Q4 Does the grease in the reducer need to be replaced?
Q5 Can I add grease from a different manufacturer? Can I specify the initial grease?
Q6 Why is the grease consistency different between the reducer and actuator of the Power Cylinder?
Q7 How long is the life of the machine screws and ball screws?
Q8 What is the life of the brake in motors with a brake? Can the brake torque be adjusted?
Q9 For outdoor use, is the unit designed for use in the rain?
Q10 Can the Power Cylinder be used in a corrosive atmosphere?
Q11 Can we use the product in a clean room?
Q12 What is the operating temperature range for the Power Cylinder?
Q13 Can the Power Cylinder be used at an altitude of 1,000 m and higher?
Q14 Can I adjust the stroke of the Power Cylinder manually?
Q15 If the Power Cylinder was used beyond the allowable start frequency provided in the catalog, what would happen?
Q16 Is the Power Cylinder's thrust different when pushing and pulling?
Q17 Does the Power Cylinder support special types of motors?
Q18 How can I improve the stopping accuracy of the Power Cylinder?
Q19 Does the machine screw type Power Cylinder need a brake?
Q20 What is the torque setting for the Power Cylinder with a Torque Limiter? Can the set torque become lower?
Q21 Is there any problem when we use internal contact stopping at the stroke end?
Q22 When two Power Cylinders are used in conjunction, why do both require limit switches for stroke adjustment?
Q23 Up to how many external limit switches for stroke adjustment can I use?
Q24 What is the output type of the rotary encoder for the Power Cylinder? Do you accept special orders?
Q25 What should I do when the paint peels off?
Q26 Is it necessary to have a rod rotation prevention for the Power Cylinder? Can the LS rod (optional external limit switch unit) be used for rotation prevention?
Q27 Is there backlash within the Power Cylinder?
Q28 The trunnion bracket has become stuck. What should I do?
 Answers
Q1 Is the Power Cylinder environmentally friendly?
A1

使用条件や計算基準により異なりますが、一般的に電力消費量は油圧シリンダの1/3、
エアシリンダの1/10程度と考えられています。
これはパワーシリンダはロッド伸縮時のみにモータが作動(電力消費)しますが、
油圧やエアはロッドが伸縮していない間も負荷保持する為にオイルや空気を送り続
けなければならないからです。
つまり、油圧ポンプやコンプレッサを稼働し続けるので、電力消費量が多くなるのです。
パワーシリンダの負荷保持は無励磁作動形ブレーキで行いますので、
作動音も静かで、シール劣化によるオイルやエアの噴出しもありません。

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Q2 Are the products compliant with the RoHS directive?
A2

After the re-evaluation of all components, most models are compliant with RoHS directive as standard. Some models are not yet compliant as standard, however, they can be made to be compliant. Contact us for details.

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Q3 What is the greasing interval for the Power Cylinder?
A3

Some types do not have a grease inlet, which means that the Power Cylinder cannot be replenished. The replenishable types should be replenished as per the chart below.

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Q4 Does the grease in the reducer need to be replaced?
A4

The Power Cylinder is filled and sealed with high quality grease and is ready to be used as is for a certain period of time. If the Power Cylinder is used in an application that runs high-frequency operations over many years, or if the Power Cylinder has

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Q5 Can I add grease from a different manufacturer? Can I specify the initial grease?
A5

If the greases used are the recommended greases listed in the catalog, the mixing of different greases does not cause a major problem because the base oil is the same. We can accommodate your request to use a different manufacturer's grease for the initi

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Q6 Why is the grease consistency different between the reducer and actuator of the Power Cylinder?
A6

The reducer uses a grease bath for lubrication. To reduce the agitation resistance for the gear, a rather soft grease of consistency degree 1 is used. As for the actuator, a grease of degree 2 is applied to the screw. If the grease scatters, the life wil

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Q7 How long is the life of the machine screws and ball screws?
A7

Machine Screw :

The service life cannot be determined by a calculation, however, it is possible to predict approximate life from our past experience. Contact us with information such as the usage conditions.

Ball Screw :

It is possible to calculate the expected traveling life based on the B10 life. For the approximate life, refer to the Load - Life Chart. When you need to know the precise life, contact us with information such as the usage conditions. (The B10 life is th


[ Click to enlarge ]

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Q8 What is the life of the brake in motors with a brake? Can the brake torque be adjusted?
A8

The usable life of a brake depends on the load torque, load inertia, brake wiring, and maintenance, but in general, a brake can operate 1 to 2 million times. Some models in our Power Cylinder lineup allow for brake torque adjustment, but it can significa

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Q9 For outdoor use, is the unit designed for use in the rain?
A9

Our outdoor-use products are not completely watertight. The Power Cylinder may draw in water while it is operating. Entry of water in slight amounts is not a problem, but if a large amount of water enters the inside of the Power Cylinder, the functionali

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Q10 Can the Power Cylinder be used in a corrosive atmosphere?
A10

Our products can be supplied with a coating, surface treatment, and/or alternative material to support use in different corrosive atmospheres, including acidic, alkali, or saline conditions. Make an inquiry with us and provide the information on the type

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Q11 Can we use the product in a clean room?
A11

Although there is no guaranteed clean degree, we have delivered many products for this purpose. Since the Power Cylinder has a fully closed structure, it seldom releases brake abrasion powder or grease.

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Q12 What is the operating temperature range for the Power Cylinder?
A12

A standard Power Cylinder can be used in temperatures ranging from 0 to 40°C. The low temperature limit depends on the series. Refer to the catalog for the specifications of the specific model. If you wish to use the Power Cylinder in an environment with

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Q13 Can the Power Cylinder be used at an altitude of 1,000 m and higher?
A13

If the motor is used at an altitude of 1,000 m or higher, the cooling effect is reduced due to thinner air. You need to check for a temperature increase at each operating cycle, so contact us with the information on your operating cycle.

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Q14 Can I adjust the stroke of the Power Cylinder manually?
A14

Yes, you can. Most models have a shaft for manual operation to adjust the stroke. Be sure to remove the load on the Power Cylinder before adjusting the stroke manually.

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Q15 If the Power Cylinder was used beyond the allowable start frequency provided in the catalog, what would happen?
A15

The allowable start frequency is a regulation put into place which takes into consideration the heat generation of the motor, brake, and screws. If the thrust used in your application is smaller than the Power Cylinder's rated thrust, the given allowable

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Q16 Is the Power Cylinder's thrust different when pushing and pulling?
A16

With hydraulic cylinders and air cylinders, the thrust is different between the pressing side and pulling side due to the oil/air intake and release. In the case of the Power Cylinder, the thrust is basically the same with pushing and pulling. However, w

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Q17 Does the Power Cylinder support special types of motors?
A17

International standards-compliant motors  :  Supports motors compliant with UL, CE, CCC, and other international standards.

Variable frequency motors  :  Supports variable frequency motors with constant torque or constant horsepower.

Servo Motor  :  Supports servo motors from any electrical appliance manufacturer. Make sure to use an input speed of 2000 r/min or below. The frame size 70 model of the Eco Series Servo type supports an input speed of up to 3000 r/min.

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Q18 How can I improve the stopping accuracy of the Power Cylinder?
A18

The brake and motor are connected using the same wire. To improve the stopping accuracy, use different wires for the brake and motor. To improve the stopping accuracy further, you can use the inverter control to reduce the speed before stopping. Also in


[ Click to enlarge ]

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Q19 Does the machine screw type Power Cylinder need a brake?
A19

The self-locking properties of the trapezoidal screw enables the cylinder to maintain load, but when vibration or shock occurs, the stop position may change. Particularly in cases of vertical installation, the object being lifted/lowered may fall when th

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Q20 What is the torque setting for the Power Cylinder with a Torque Limiter? Can the set torque become lower?
A20

Torque is set to 150 to 200% for the rated thrust of the Power Cylinder. Our Torque Limiter is a friction-type clutch. Several occasions of slipping within a short time period should not cause reduced torque, which allows for continued use. However, in t

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Q21 Is there any problem when we use internal contact stopping at the stroke end?
A21

Contact stopping can only be used for the Eco series, CDS type, and F series (100 to 400N types. The overload detection unit is required.). If you want to use contact stopping for other series, use a type with a thrust detection mechanism and set a limit

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Q22 When two Power Cylinders are used in conjunction, why do both require limit switches for stroke adjustment?
A22

When multiple Power Cylinders are used in conjunction, each cylinder is driven by dedicated motors. Even when the same type of motors are started and stopped at the same timing, there are individual differences in the slip among motors and such differenc

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Q23 Up to how many external limit switches for stroke adjustment can I use?
A23

When mounting horizontally with the T series, external limit switches can be installed at 150 mm intervals, considering wiring. In the case of a vertical installation, they can be installed at 50 mm intervals. Contact us for relevant information on other

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Q24 What is the output type of the rotary encoder for the Power Cylinder? Do you accept special orders?
A24

The output type of the standard encoder is voltage output. Open collector and line driver output types are also available. Contact us for details.

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Q25 What should I do when the paint peels off?
A25

Peeling off of the paint does not affect the performance of the Power Cylinder. However, to prevent rust, coat the peeled part with paint. Contact us if you need Tsubaki E&M's standard colors. We offer spray cans of our standard paints.

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Q26 Is it necessary to have a rod rotation prevention for the Power Cylinder? Can the LS rod (optional external limit switch unit) be used for rotation prevention?
A26

Due to the structure of the Power Cylinder, rotational force occurs at the rod. Link mechanisms can tolerate the rotational force, but when the application pulls a rope or chain, the rope or chain cannot tolerate the rotational force and twists. Therefor

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Q27 Is there backlash within the Power Cylinder?
A27

As clearance of the end fitting and mounting bracket, backlash occurs at the hole portion H10 and pin portion d9. The ball screw of the Power Cylinder is of C10 accuracy grade and also has backlash. Mechanical backlash is a combination of the above.

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Q28 The trunnion bracket has become stuck. What should I do?
A28

If the trunnion bracket has become stuck, you will need to fuse that portion to remove it. In order to prevent sticking, apply stick-proofing grease to the trunnion pin. The same grease used for the main unit can be used. Another type in which a bushing

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