Updated ISO9001 and ISO14001

We would like to inform you that TOK has updated the certificates for ISO9001 and ISO14001. TOK acquired ISO9001 in 1999 and ISO14001 in 2000; respectively, 19 years and 18 years have already passed. We will always undertake to improve quality, and ensure environmental safety.

Written by Mayu

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Magnetic torque limiter

What is a magnetic torque limiter?

It generates torque from magnetic hysteresis resistance.

The magnet does not slide so magnetic torque limiter is more durable.

Advantages of using a magnet torque limiter compared with a coil spring torque limiter:

1.       High durability

2.       High speed revolution

3.       Stable torque

4.       Minimal sliding sound

　　　　TLEU series                                                   TLES series

TOK Newsletter

TOK will provide ONLY subscribers with valuable technical information.

The newsletter will be delivered about once per month, If you would like to receive the newsletter from us, you can subscribe via our contact form.

Written by Mayu

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Coil spring torque limiter

What is structure of coil spring torque limiter?

A coil spring is press-fitted in the sleeve, and when it turns, it slides and generates torque. The more it tightens a coil spring, the more it generates torque, but the more loosen coil springs, the lower it generates torque.

Advantages of using a coil spring torque limiter compared with a magnet torque limiter!

1.       Light Weight

2.       Compact Size

3.       Competitive Price

             TLD4 series                                       　           TLD7 series

　　　　

        
             

TOK Newsletter

TOK will provide ONLY subscribers with valuable technical information.

The newsletter will be delivered about once per month, If you would like to receive the newsletter from us, you can subscribe via our contact form.

                                         
Written by Mayu

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NEW ROTARY DAMPER LAUNCHED

We are proud to present our new rotary damper TD130.
It is the smallest continuous rotation angle damper in TOK, so really convenient and versatile damper. TD130 meets your requirement in miniaturization. The quality of TD130 is guaranteed!

TOK Newsletter

TOK will provide ONLY subscribers with valuable technical information.

The newsletter will be delivered about once per month, If you would like to receive the newsletter from us, you can subscribe via our contact form.

Written by Mayu

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What's torque limiter?

What’s Torque Limiter?

Torque limiter is a device that cuts off torque transmission when overload is applied. It is also called slip clutch. By preventing excessive rotation of the spindle, it prevents overload damage to the driven shaft and related to equipment.

TOK manufactures 2 types of torque limiters :

l  Spring Type using friction / resistance

Ø  Max. torque: 4kgf･cm

Ø  Max. allowable rotation speed: 400min^-1

Ø  Life cycle time: 1 Mio. cycles

TLD4 series                                       TLD7 series

　　　　　

l  Magnet Type using magnetic force

Ø  Max. torque: 0.6kgf･cm

Ø  Max. allowable rotation speed: 2,000min^-1

Ø  Life cycle time: 10 Mio. cycles

TLEU series                       

Application examples:

Sunshade of child seat                   Belt-winch

Printer / Copy machine                     ATM machine

TOK Newsletter

TOK will provide ONLY subscribers with valuable technical information.

The newsletter will be delivered about once per month, If you would like to receive the newsletter from us, you can subscribe via our contact form.

Written by Hiro

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TOK exhibits at Manufacturing World Japan

We are excited to announce that TOK will exhibit at the 29^th Manufacturing World Japan at Tokyo Big Sight from June 20^th to 22^nd.
We will show our standard products like rotary dampers and bearings, and also our new developments SR2 and SRX! We are looking forward to having a discussion with you guys in E75-10!

Please check the following link:

http://d.japan-mfg.jp/en/Exhibitors/4220594/TOK-INC

Written by Mayu

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Temperature characteristics and speed characteristics

Oil dampers have characteristics of temperature and speed dependence.

In general, the viscosity of liquid changes greatly with temperature. Especially the viscosity of oil changes markedly as temperature changes. The viscosity decreases as the temperature rises and the viscosity rises as it goes down. This phenomenon is called temperature dependence. The damper has the property that the torque changes with the difference in temperature. When the temperature is higher, the movement is going to be faster and when the temperature is lower, the movement is going to be slower. In other words, damper not affected by temperature can be said to be easy to use damper.

As an example, here is the graph of temperature characteristics TD14 rotary damper. At 23℃ the closing time is approx. 6.5 seconds, and at 40℃ the closing time is approx. 6 seconds, even at 0℃ it is 7.3 seconds. If the temperature goes up and the viscosity of oil drops, it gets faster but it does not go up much.

Also, as the speed goes up the torque increases and we call it speed dependence. The infinite angle damper takes torque with the shear resistance generated by agitating the oil, and this shear resistance increases in proportion to the speed.
This is a speed dependence graph of TD62. You will see that the torque increases as the speed increases. In other words, since it can not be set to the slow down speed assuming that the torque is not matched. When you choose dampers to work for the toilet seat covers, you should consider the speed dependence of the damper.

TOK Newsletter

TOK will provide ONLY subscribers with valuable technical information.

The newsletter will be delivered about once per month, If you would like to receive the newsletter from us, you can subscribe via our contact form.

Written by Mayu

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