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Home > Products > Niemann Worm Gear Units > MHI HASEG Worm Gear Reducer SOHA Series

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MHI HASEG Worm Gear Reducer SOHA Series

The MHI HASEG Worm Gear Reducer SOHA Series is a high-performance, single-stage worm reducer with a vertical shaft configuration, designed for light-duty applications where compact installation, efficient torque transfer, and self-locking safety are essential. Featuring MHI HASEG’s signature Niemann tooth profile and a vertical input or output shaft layout, the SOHA Series offers quiet, reliable, and maintenance-friendly operation for compact machinery and automation systems.


MHI HASEG Worm Gear Unit-2.png

 

Key Features

 

  1. Vertical Shaft, Compact Design

    The SOHA Series offers a vertical input or output shaft orientation, making it ideal for top-down or bottom-up power transmission in equipment with limited horizontal space. Its compact footprint is perfect for light-duty vertical drive applications.

  2. Niemann Tooth Profile for Smooth Operation

    The specially engineered concave-convex gear flanks ensure uniform contact pressure, enhanced oil film retention, and improved load distribution. This results in lower friction, reduced noise, and longer service life, even at small sizes.

  3. Self-Locking for Position Holding

    With a low lead-angle worm gear design, the SOHA Series provides built-in self-locking capability, preventing back-driving and ensuring safe holding in vertical load-bearing systems.

  4. Efficient and Quiet Performance

    The combination of precision machining and optimized gear geometry ensures whisper-quiet operation and stable torque transmission with minimal vibration, ideal for sensitive environments.

  5. Simple Lubrication and Maintenance

    Splash lubrication using Klüber synthetic oils (SYNTHESO HT or SYNTH GH6) ensures consistent gear protection. Oil-level indicators and grease nipples make inspection and servicing easy without disassembly.

  6. Standardized Dimensions for Easy Integration

    All housing, shaft, and fit tolerances conform to JIS B1301-1976 standards, ensuring compatibility with existing machinery and flexible replacement or upgrade options.

Typical Specifications

Specification

 SOHA Series
Shaft Orientation Vertical (input or output)
Center Distance (mm) 65, 80, 99, 125, 160, 200, 225, 250, 280, 320, 360, 400
Reduction Ratios (iₙ) 5, 6.3, 8, 10, 12.5, 16, 20, 25, 31.5, 40, 50
Rated Output Torque (T₂N, Nm) 180–750 Nm (size-dependent)
Max Input Speed (n₁, min⁻¹) Up to 1,800
Efficiency (η) Up to 90%
Lubrication Splash lubrication (Klüber oil)
Housing Material Cast iron
Operating Temperature –10 °C to +40 °C
Protection Class IP54 (standard)
 

Applications

  • Vertical Mixers & Agitators: Compact, quiet vertical drive with self-locking safety.

  • Light-Duty Lifting Devices: Stable torque delivery with anti-backdrive protection.

  • Automation & Lab Equipment: Quiet, low-vibration drive for compact systems.

  • Conveyors & Rotary Tables: Precise, efficient motion in small vertical layouts.

  • Packaging & Food Equipment: Hygienic and low-noise vertical drive systems.

Why Choose the SOHA Series?

 

  • Compact Vertical Layout: Saves space in vertically oriented machinery.

  • Reliable Self-Locking: Prevents reverse motion for safe load control.

  • Durable & Quiet: Niemann gear design ensures stable, long-lasting performance.

  • Low Maintenance: Simple lubrication system supports easy servicing.

  • Proven Support: Backed by MHI HASEG engineering and Melink Automation expertise.

For technical details, dimensional drawings, or product selection assistance, contact Melink Automation, your trusted distributor of the MHI HASEG Worm Gear Reducer SOHA Series.

 

 

MHI HASEG Worm Gear Reducer SOHA  Series Size：65・80・99（Output Shaft Arrangement：Left）

 

SOHA Gear Ratio: 5~50 MHI HASEG Worm Gear Reducer SOHA  Series Size
65 80 99
Output Shaft Arrangement：Left 5 SOHA65L-5 SOHA80L-5 SOHA99L-5
6.3 SOHA65L-6.3 SOHA80L-6.3 SOHA99L-6.3
8 SOHA65L-8 SOHA80L-8 SOHA99L-8
10 SOHA65L-10 SOHA80L-10 SOHA99L-10
12.5 SOHA65L-12.5 SOHA80L-12.5 SOHA99L-12.5
16 SOHA65L-16 SOHA80L-16 SOHA99L-16
20 SOHA65L-20 SOHA80L-20 SOHA99L-20
25 SOHA65L-25 SOHA80L-25 SOHA99L-25
31.5 SOHA65L-31.5 SOHA80L-31.5 SOHA99L-31.5
40 SOHA65L-40 SOHA80L-40 SOHA99L-40
50 SOHA65L-50 SOHA80L-50 SOHA99L-50

 

MHI HASEG Worm Gear Reducer SOHA  Series Size：65・80・99（Output Shaft Arrangement：Right）

 

SOHA Gear Ratio: 5~50 MHI HASEG Worm Gear Reducer SOHA  Series Size
65 80 99
Output Shaft Arrangement：Right 5 SOHA65R-5 SOHA80R-5 SOHA99R-5
6.3 SOHA65R-6.3 SOHA80R-6.3 SOHA99R-6.3
8 SOHA65R-8 SOHA80R-8 SOHA99R-8
10 SOHA65R-10 SOHA80R-10 SOHA99R-10
12.5 SOHA65R-12.5 SOHA80R-12.5 SOHA99R-12.5
16 SOHA65R-16 SOHA80R-16 SOHA99R-16
20 SOHA65R-20 SOHA80R-20 SOHA99R-20
25 SOHA65R-25 SOHA80R-25 SOHA99R-25
31.5 SOHA65R-31.5 SOHA80R-31.5 SOHA99R-31.5
40 SOHA65R-40 SOHA80R-40 SOHA99R-40
50 SOHA65R-50 SOHA80R-50 SOHA99R-50

 

 

MHI HASEG Worm Gear Reducer SOHA  Series Size：125~250（Output Shaft Arrangement：Left）

 

SOHA Gear Ratio: 5~50 MHI HASEG Worm Gear Reducer SOHA  Series Size
125 160 200 225 250
Output Shaft Arrangement：Left 5 SOHA125L-5 SOHA160L-5 SOHA200L-5 SOHA225L-5 SOHA250L-5
6.3 SOHA125L-6.3 SOHA160L-6.3 SOHA200L-6.3 SOHA225L-6.3 SOHA250L-6.3
8 SOHA125L-8 SOHA160L-8 SOHA200L-8 SOHA225L-8 SOHA250L-8
10 SOHA125L-10 SOHA160L-10 SOHA200L-10 SOHA225L-10 SOHA250L-10
12.5 SOHA125L-12.5 SOHA160L-12.5 SOHA200L-12.5 SOHA225L-12.5 SOHA250L-12.5
16 SOHA125L-16 SOHA160L-16 SOHA200L-16 SOHA225L-16 SOHA250L-16
20 SOHA125L-20 SOHA160L-20 SOHA200L-20 SOHA225L-20 SOHA250L-20
25 SOHA125L-25 SOHA160L-25 SOHA200L-25 SOHA225L-25 SOHA250L-25
31.5 SOHA125L-31.5 SOHA160L-31.5 SOHA200L-31.5 SOHA225L-31.5 SOHA250L-31.5
40 SOHA125L-40 SOHA160L-40 SOHA200L-40 SOHA225L-40 SOHA250L-40
50 SOHA125L-50 SOHA160L-50 SOHA200L-50 SOHA225L-50 SOHA250L-50

 

MHI HASEG Worm Gear Reducer SOHA  Series Size：125~250（Output Shaft Arrangement：Right）

 

SOHA Gear Ratio: 5~50 MHI HASEG Worm Gear Reducer SOHA  Series Size
125 160 200 225 250
Output Shaft Arrangement：Right 5 SOHA125R-5 SOHA160R-5 SOHA200R-5 SOHA225R-5 SOHA250R-5
6.3 SOHA125R-6.3 SOHA160R-6.3 SOHA200R-6.3 SOHA225R-6.3 SOHA250R-6.3
8 SOHA125R-8 SOHA160R-8 SOHA200R-8 SOHA225R-8 SOHA250R-8
10 SOHA125R-10 SOHA160R-10 SOHA200R-10 SOHA225R-10 SOHA250R-10
12.5 SOHA125R-12.5 SOHA160R-12.5 SOHA200R-12.5 SOHA225R-12.5 SOHA250R-12.5
16 SOHA125R-16 SOHA160R-16 SOHA200R-16 SOHA225R-16 SOHA250R-16
20 SOHA125R-20 SOHA160R-20 SOHA200R-20 SOHA225R-20 SOHA250R-20
25 SOHA125R-25 SOHA160R-25 SOHA200R-25 SOHA225R-25 SOHA250R-25
31.5 SOHA125R-31.5 SOHA160R-31.5 SOHA200R-31.5 SOHA225R-31.5 SOHA250R-31.5
40 SOHA125R-40 SOHA160R-40 SOHA200R-40 SOHA225R-40 SOHA250R-40
50 SOHA125R-50 SOHA160R-50 SOHA200R-50 SOHA225R-50 SOHA250R-50

 

 

MHI HASEG Worm Gear Reducer SOHA  Series Size：280~400（Output Shaft Arrangement：Left）

 

SOHA Gear Ratio: 5~50 MHI HASEG Worm Gear Reducer SOHA  Series Size
280 320 360 400
Output Shaft Arrangement：Left 5 SOHA280L-5 SOHA320L-5 SOHA360L-5 SOHA400L-5
6.3 SOHA280L-6.3 SOHA320L-6.3 SOHA360L-6.3 SOHA400L-6.3
8 SOHA280L-8 SOHA320L-8 SOHA360L-8 SOHA400L-8
10 SOHA280L-10 SOHA320L-10 SOHA360L-10 SOHA400L-10
12.5 SOHA280L-12.5 SOHA320L-12.5 SOHA360L-12.5 SOHA400L-12.5
16 SOHA280L-16 SOHA320L-16 SOHA360L-16 SOHA400L-16
20 SOHA280L-20 SOHA320L-20 SOHA360L-20 SOHA400L-20
25 SOHA280L-25 SOHA320L-25 SOHA360L-25 SOHA400L-25
31.5 SOHA280L-31.5 SOHA320L-31.5 SOHA360L-31.5 SOHA400L-31.5
40 SOHA280L-40 SOHA320L-40 SOHA360L-40 SOHA400L-40
50 SOHA280L-50 SOHA320L-50 SOHA360L-50 SOHA400L-50

 

MHI HASEG Worm Gear Reducer SOHA  Series Size：280~400（Output Shaft Arrangement：Right）

 

SOHA Gear Ratio: 5~50 MHI HASEG Worm Gear Reducer SOHA  Series Size
280 320 360 400
Output Shaft Arrangement：Right 5 SOHA280R-5 SOHA320R-5 SOHA360R-5 SOHA400R-5
6.3 SOHA280R-6.3 SOHA320R-6.3 SOHA360R-6.3 SOHA400R-6.3
8 SOHA280R-8 SOHA320R-8 SOHA360R-8 SOHA400R-8
10 SOHA280R-10 SOHA320R-10 SOHA360R-10 SOHA400R-10
12.5 SOHA280R-12.5 SOHA320R-12.5 SOHA360R-12.5 SOHA400R-12.5
16 SOHA280R-16 SOHA320R-16 SOHA360R-16 SOHA400R-16
20 SOHA280R-20 SOHA320R-20 SOHA360R-20 SOHA400R-20
25 SOHA280R-25 SOHA320R-25 SOHA360R-25 SOHA400R-25
31.5 SOHA280R-31.5 SOHA320R-31.5 SOHA360R-31.5 SOHA400R-31.5
40 SOHA280R-40 SOHA320R-40 SOHA360R-40 SOHA400R-40
50 SOHA280R-50 SOHA320R-50 SOHA360R-50 SOHA400R-50

 
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  • The MHI HASEG Worm Gear Reducer SOHA65L-5 is engineered for reliability and efficiency in industrial settings requiring moderate torque and speed reduction. With a reduction ratio of 5:1, this gear reducer effectively manages input speeds up to 1500 RPM, translating to a controlled output speed suitable for various machinery and automation systems.

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  • The MHI HASEG Worm Gear Reducer SOHA65R-5 is designed for high-performance applications, offering efficient power transmission and durability. This gear reducer is built to handle demanding conditions while ensuring reliable operation across a range of industrial uses.

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