Asbestos is not used in the current products. Until May 1987, we used friction plates containing asbestos. From June 1987 to September 1990, we sold both products containing asbestos and non-asbestos products. Since 1990, we have used only non-asbestos products.

The friction plate is made of inorganic/organic fiber and resin as a base, added with friction stabilizer and reinforcement material, and formed by die molding.

Use a shaft snap ring or an end plate.

By changing the sprocket to one with a high-frequency hardened tooth tip, models TL200 to TL700 can be used up to 1800 r/min, and the larger models can be used up to about 800 r/min.

You cannot use standard products. When water or oil splashes onto the friction plate, the friction coefficient changes, resulting in a change in the slip torque. Water and oil also cause rust. Contact us as we may be able to make special arrangements.

Up to 15000 N･m can be supported. Contact us if you need a higher slip torque.

From 1987 to 1990, we sold both products contains asbestos and non-asbestos products. NA indicates that the friction plate is made of non-asbestos material, in order to allow differentiation from the old products containing asbestos. Since 1990, all products shipped from Tsubaki have been non-asbestos products. Consequently, NA has not been used in the model number since that time.

The number at the end indicates the number of disk springs. The TL250-2 has two disk springs of the same type as the TL250-1 in succession in the same orientation. The set torque is doubled when the tightening amount is the same. All the other parts are in common.

A bush receives a radial load on the hub which is applied when the Torque Limiter slips.

Select the longest (thickest) bush from the bushes which are shorter than the thickness of the center member (sprocket) to be used. For example, select B6.5 (6.5 mm) for the RS50.

You need to machine the inner diameter according to the outer diameter of the bush. Finish the friction faces (both sides) to 3S to 6S. Refer to the catalog for the dimensions and tolerance.

We have products machined with the shaft bore diameter tolerance of H7 and a keyway conforming to new JIS in stock. Contact us to order special shaft bore machining.

The 0 point is the state of no looseness when the adjusting nut (bolt) is tightened manually.

After the 0 point is determined, tighten the adjusting nut (bolt) gradually from the loose tightening to greater tightening while checking the operation with the actual machine, and find the optimum tightening position.

Specify the set torque in your order and we will ship the product after setting the torque. You need to order a shaft bore machined product with a center member.

Indicate the set torque value in N･m at the end of the model number.

ex. ：TL250-1-04022-TH18JD1-N9.8(to set the torque to 9.8N･m )

When the torque setting is not specified, the adjusting nut (bolt) is tightened at 120° for all models.

No, it isn't possible. The allowable minimum number of sprocket teeth for the TL350 is 21T when the RS50 is used. With 20T, the outer diameter is so small that the roller chain will interfere with the hub. Refer to the catalog for the list of minimum number of sprocket teeth for each model.

You can use a proximity switch and digital tachometer to detect the decrease in the rotation speed when the Torque Limiter slips. Refer to the catalog for an example.

There is no specific direction on the driven side or drive side. For your reference, the maximum shaft bore diameter is larger on the coupling side.

No, a bush will not be included because the length of the bush is not specified. If you need a bush, specify the size, for example TL200-1-B6.0.

Yes, it is possible. Specify TL250A for the friction plate and TL250S for the disk spring.

It is a part held between the parts of the Torque Limiter. A sprocket is most commonly used as a center member. We also offer Torque Limiters with sprockets included.

Most of the Torque Limiters have been changed to RoHS compliant. For some models, however, the changeover has not yet been completed because of inventory levels. If you need RoHS-compliant products, specify "RoHS-compliant" in your order.