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Generally, a reduction ratio of 1/60 or 1/50 is expected to provide a self-locking effect. However, this is considered to be a completely stopped state with no vibrations.

Our worm reducers are designed with efficiency in mind, so a reduction ratio of 1/60 can be expected to provide a self-locking effect.

If you require even more emphasis on self-locking, please contact us for information on strengthened self-locking specifications.

For details, please refer to our worm reducer catalog (Tsubaki Troi Drive Worm Power Drive).

All of our standard worm gears are right-hand helix, and the rotational relationship between the input and output shafts is as follows:

It can also be used in both clockwise and counterclockwise directions.

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The output shaft Power-Lock specification combines a hollow shaft with a friction type fastener (Tsubaki Power-Lock SL series).

Power-Lock specifications are suitable for applications where a moment of inertia is applied and where key fastening would cause key wear. Because it is a friction type, it will not wear out like a key.

On the other hand, when using it in an elevator or similar, although this is not usually a problem, there is a risk of it falling if there is a problem with the installation, so we recommend that you install a separate safety device on the driven shaft side.

The applicable models are the hollow shaft type SW, EW, and TD series. Croise Motor are also available, so please contact us for more information.

Low backlash specifications are available for the EW, SW, TD series and TERVO.

The difference from the standard product is that the thrust gap of the worm shaft is reduced to reduce backlash in the gear section.
Specifically, the standard backlash of the EW125T20L is 0.06 to 0.36°, but with the low backlash specification the maximum value can be reduced to 0.06 to 0.14°.

It is possible to further reduce backlash by manufacturing a new reducer case or worm gear, so please contact us.

The reduction ratio of the two-stage worm reducer is a combination of (1st stage) 1/20 x (2nd stage) 1/30.
These reduction ratios are combinations that do not allow for self-locking.

As a special product, it is possible to change the combination of reduction ratios between the first and second stages.
For example, changing the combination to (1st stage) 1/10X (2nd stage) 1/60 will result in a specification that can be expected to self-lock.

These combinations use standard gears and simply change the combination, so there is little impact on price or delivery.

We have a lot of experience with special reduction ratio specifications (e.g. 1/8.0, etc.).
However, since special jigs and tools are required, this method is only used when manufacturing continuous products or large quantities.
We also have a proven track record with left-handed specifications, so please feel free to contact us for more information.

As with other reducers, there are no special requirements for selecting a worm reducer.

The main conditions are: 1) device name, 2) motor capacity and rotation speed, 3) output shaft torque or load torque, 4) output shaft rotation speed or reduction ratio, and 5) output shaft shape and shaft arrangement.
The worm reducer can generally be selected based on the following conditions: ⑥ Output shaft load ⑦ Operating hours (per day) ⑧ Number of starts (per hour) ⑨ Ambient temperature.

However, if the moment of inertia is large, or if it is used in an elevating drive or inverting mechanism, care must be taken. Please contact us for details.

It is possible to use the worm reducer by turning it by hand, but for transmission capacity please refer to the value for 100 r/min in the transmission capacity table in the catalog.

When using it for elevators or inverting machines, we recommend selecting a reduction ratio that will allow for self-locking, and also installing a holding brake to ensure safety.

The transmission capacity of the worm reducer is under continuous operation at 100% load with stable oil temperature.

When using in cold conditions, efficiency will decrease, so please select by deducting the power from kW ratings table. The discount rate will vary depending on the reduction ratio, but it will range from -4% to a maximum of -15%.

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Please make use of the replacement website for equivalent products from other manufacturers.
When making a replacement, be sure to check the product catalog for details on capacity, appearance, dimensions, etc.

We have a website where Search previous model No., so please make use of it.
For model numbers not listed on the replacement part search service, please contact us.

Follow the steps below to clean the inside of the case.

1. Run the engine for a while to raise the temperature of the lubricating oil, then drain it through the drain plug.
2. Add the replaced lubricant and run it for a while.
3. Drain the oil from 2.
4. Check the color of the oil in step 3 and repeat this process (2 or 3 times) until no foreign matter or Wear debris are present.
5. Add an appropriate amount of new lubricant.

*When working at high temperatures, follow the instructions in the Instruction Manuals and be careful not to get burned.

Lubrication is extremely important for the capacity, lifespan, and efficiency of worm reducers, so be sure to use lubricants specified by our company.

Also, avoid mixing oils with other brands as this may reduce performance and lifespan.
If you wish to make any changes, please be sure to consult with us.

It can also be purchased from Tsubakimoto Chain dealers or Idemitsu

Purchases can be made in 4L increments through Tsubakimoto Chain's retailers, but in 20L increments through Idemitsu

It is possible to specify specifications that include food-grade lubricant (H1 grade).
However, the transmission capacity will be slightly lower than the catalog value, so please contact us.

In addition, we will provide an estimate for this product.

There are restrictions on the installation direction depending on the model.
Please use the product in the correct mounting position. Using the product in the wrong mounting position may result in problems such as poor lubrication or oil leaks.

Also, please check the catalog to see if there are any restrictions on the mounting position.

The pressure vent releases pressure inside the reducer.

If it is blocked by a plug or other object, the pressure inside the reducer cannot be released, which may result in oil leaks from the oil seal or other parts.

The pressure vent is attached to the product when it is delivered, so please be sure to install it before operation.