Stop Worrying About Downtime and Noise in Your Factory
Imagine this. Your conveyor belt stops in the middle of a busy shift. Or your mixer makes a loud, grinding noise that scares your workers. You check the gearbox, and the shaft is worn out. The oil is leaking. You need a replacement fast, but you are scared of buying a cheap copy that will break in a month. You need a machine that works hard and lasts long.This is why we bring you the real Japanese Tsubakimoto worm gear reducer. It is not just a gearbox. It is a heavy-duty power transmission tool built for real work. We have the specific model you are looking for. It is the SW80B20LF, also known as the TB35 series. It has a 1:20 gear ratio. The input shaft is 10mm. The output shaft is 12mm. These exact sizes solve your mounting problems. You do not need to change your coupler or re-drill holes. It fits right in. This unit is famous for its quiet operation and high torque. It will keep your production line moving without the headache of constant repairs.
Exact Technical Specs for Your Engineer
We know you need the real numbers. No guesses. This reducer is made in Japan. It follows the strict JIS standards. Here is the data you need to check if it fits your motor and machine.Basic Model Info:
- Brand: Tsubakimoto Chain Co. (TSUBAKI)
- Series: SW / TB35 Series
- Model Number: SW80B20LF
- Gear Ratio: 1:20 (Single reduction)
- Center Distance: 80mm (3.15 inches)
- Structure: Worm gear input, Integral output shaft with worm wheel
Shaft Details (Very Important):
- Input Shaft (Worm): 10mm diameter. This connects to your motor.
- Output Shaft: 12mm diameter. This connects to your driven equipment.
- Keyway: Finished to New JIS standards. We can supply the key if you need it.
Performance Data:
- Rated Power: This unit handles motors from 1.5kW to 3.7kW.
- Output Torque: Depending on your motor speed, you get strong torque.
- At 1500 rpm input: Approx 22.3 N·m
- At 1000 rpm input: Approx 33.8 N·m
- Allowable Radial Load: 1604 N (at the center of the output shaft). This means it can handle heavy loads without bending the shaft.
- Efficiency: Worm gears have sliding contact. Efficiency is around 40% to 70%. But the benefit is high reduction in one step and self-locking.
Physical Dimensions:
- Output Shaft Length (A): 148mm
- Recommended Driven Shaft Length (L): 122mm
- Housing: Cast iron or strong alloy. It resists impact and heat.
- Weight: Approx 12-14kg (Solid build, not hollow or light).
Why This Japanese Worm Gearbox is Different
You might see cheaper reducers from other markets. But they cut corners. Tsubakimoto does not. Here is what makes this 1:20 ratio unit special for your application.1. The “Self-Locking” Safety FeatureThis is a big deal. Because the gear ratio is 1:20 (which is higher than 1:60 threshold for some designs, but worm gears generally have this trait), it has a self-locking function. What does this mean? If your machine is a hoist, a lift, or an inclined conveyor, it will not slide back when the power is off. The worm gear locks the output shaft. This keeps your workers safe and prevents load drop. You do not need an expensive external brake for holding position.2. Super Quiet OperationWorm gears are known for being loud. Not this one. Tsubaki uses a special “Globoidal” (throat) shape for the worm wheel. This creates more contact surface. The gears mesh smoothly. It runs very quiet. You can stand next to the machine and talk without shouting. This is great for indoor factories or places with noise limits.3. Sealed and Maintenance-FreeThe input shaft uses an acrylic rubber oil seal. It is designed to keep grease in and dust out. The manual says you should not disassemble it unless you are replacing the seal. The bearings are pre-adjusted at the factory. If you take it apart, you might ruin the alignment. We sell it as a sealed unit. You just add oil and run it. The oil filter is inside. When you change the oil, you change the filter. Simple.4. Precision KeywaysThe keyway on the 10mm input shaft and 12mm output shaft is cut to JIS normal grade. It is precise. When you put the key in, there is no “slop” or play. This means no vibration. Vibration kills bearings. By using precise keys, this reducer runs smooth for years.
Where to Use This 1:20 Ratio Reducer
This specific model (SW80B with 1:20 ratio) is a “workhorse” size. It is not too small, not too big. It is perfect for medium-duty machines. Here are the best scenes to use it:
- Conveyor Systems: If you have a small package sorting line or a food processing belt. The 1:20 ratio gives you the right speed to move boxes without jerking them.
- Agitators and Mixers: For chemical tanks or dough mixers. The high torque at low speed is perfect to turn thick liquids. The self-locking stops the mix from spinning backward when the motor stops.
- Packaging Machines: Like wrapping machines or labeling machines. You need precise slow movement. The 12mm output shaft fits standard cams and linkages.
- Gate Operators: For heavy automatic gates. The safety lock feature keeps the gate closed during a power outage.
- Solar Trackers: If you are building a small solar panel tracker, this gearbox handles the wind load well because of the high radial load rating (1604N).
Installation Tip:When you install it, make sure you use a torque arm. The housing has holes for it. If you do not use a torque arm, the housing might spin when you start the motor. Also, do not use a line shaft to connect two reducers. Bolt the motor flange directly or use a coupler.
Get the Real Deal for Your Factory
Do not risk your production with fake or low-quality copies. You need a reducer that matches the nameplate specs. You need a Tsubakimoto SW80B20LF that delivers 1:20 ratio reliably.We have this item in stock or available from the Tsubaki representative network. It comes with the nameplate, the manual, and the bolts for the torque arm.Ready to fix your machine?Send us an inquiry today. Tell us your motor kW and your required output speed. We will confirm if this 10mm input / 12mm output model is the perfect fit for you. Or we will find the exact size you need from the Tsubaki catalog.Click “Contact Us” or “Request Quote” now. Let’s get your conveyor belt turning again with Japanese quality.