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

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MHI HASEG Worm Gear Reducer SEHV Series

The MHI HASEG Worm Gear Reducer SEHV Series is a high-performance, two-stage vertical-shaft hollow-output worm gear reducer designed for applications that demand compact installation, high reduction ratios, and safe, reliable torque transmission. Built with MHI HASEG’s precision Niemann tooth profile and robust materials, the SEHV Series ensures ultra-smooth operation, quiet performance, and exceptional self-locking capability—making it ideal for lifting equipment, rotary systems, and vertical automation drives.

MHI HASEG Worm Gear Unit-2.png

 

Key Features

  1. Two-Stage Vertical Shaft & Hollow Output Design

    The SEHV Series features a vertical input shaft and hollow output configuration, enabling direct shaft mounting and saving space in vertically aligned machinery. The two-stage worm gear system delivers high reduction ratios within a compact, vertically oriented housing.

  2. Niemann Tooth Profile for Enhanced Efficiency

    MHI HASEG’s concave-convex Niemann gear flanks increase contact area and oil retention, reducing friction and wear while improving torque transfer and overall transmission efficiency.

  3. Self-Locking Mechanism for Safety

    With low lead-angle worm gears in both stages, the SEHV Series offers inherent back-drive prevention. This built-in self-locking capability ensures stable positioning and eliminates the need for external braking systems.

  4. Quiet & Vibration-Free Operation

    Precision machining and optimized gear geometry ensure whisper-quiet performance and minimal vibration—ideal for environments requiring stable, smooth motion such as food, packaging, or medical equipment.

  5. Robust & Durable Construction

    Made from hardened alloy steel worm shafts and high-strength bronze worm wheels, the SEHV Series withstands continuous use under demanding conditions. Cast iron housing provides long-term structural reliability.

  6. Easy Maintenance with Splash Lubrication

    Utilizing Klüber SYNTHESO HT or SYNTH GH6 oil, the splash lubrication system offers excellent protection for gears. The design includes accessible filler, drain ports, oil-level indicators, and grease nipples for efficient servicing.

  7. Standardized Dimensions (JIS Compliant)

    Shaft fits, housing tolerances, and mounting configurations conform to JIS B1301-1976, ensuring compatibility with standard equipment and ease of replacement or retrofitting.

Typical Specifications

Specification

 SEHV Series
Shaft Orientation Vertical (input) / Hollow output
Center Distance (mm) 100, 125, 160, 200, 225, 250, 280, 320, 360, 400, 450, 500
Reduction Ratios (iₙ) 63, 80, 100, 125, 160, 200, 250
Rated Output Torque (T₂N, Nm) Size-dependent (consult catalog)
Max Input Speed (n₁, min⁻¹) Up to 1,800
Efficiency (η) Up to 80–85% (two-stage)
Lubrication Splash lubrication (Klüber oil)
Housing Material Cast iron
Operating Temperature –10 °C to +40 °C
Protection Class IP54 (standard)
 

Applications

  • Lifting Equipment & Hoists: Safe vertical torque transmission with self-locking.

  • Rotary Tables & Indexing Units: High-precision motion with high reduction.

  • Vertical Conveyors & Elevators: Space-saving vertical drive with stable load holding.

  • Automation Machinery: Compact, reliable vertical torque control.

  • Food & Packaging Equipment: Quiet, hygienic operation with minimal maintenance.

Why Choose the SEHV Series?

 

  • Compact, High-Ratio Vertical Drive: Up to 250:1 reduction in a vertical footprint.

  • Built-In Safety: Self-locking mechanism prevents reverse rotation.

  • Smooth & Quiet Operation: Niemann profile ensures efficient, low-vibration performance.

  • Easy Installation & Service: JIS-compliant dimensions and accessible maintenance points.

  • Trusted Engineering: Backed by MHI HASEG precision manufacturing and Melink Automation support.

For technical data, torque charts, or assistance with product selection, contact Melink Automation, your trusted distributor of the MHI HASEG Worm Gear Reducer SEHV Series.

 

 

MHI HASEG Worm Gear Reducer SEHV  Series Size：100~250（Output Shaft Arrangement：Left）

 

SEHV Gear Ratio: 63~250 MHI HASEG Worm Gear Reducer SEHV  Series Size
100 125 160 200 225 250
Output Shaft Arrangement：Left 63 SEHV100LO-63 SEHV125LO-63 SEHV160LO-63 SEHV200LO-63 SEHV225LO-63 SEHV250LO-63
80 SEHV100LO-80 SEHV125LO-80 SEHV160LO-80 SEHV200LO-80 SEHV225LO-80 SEHV250LO-80
100 SEHV100LO-100 SEHV125LO-100 SEHV160LO-100 SEHV200LO-100 SEHV225LO-100 SEHV250LO-100
125 SEHV100LO-125 SEHV125LO-125 SEHV160LO-125 SEHV200LO-125 SEHV225LO-125 SEHV250LO-125
160 SEHV100LO-160 SEHV125LO-160 SEHV160LO-160 SEHV200LO-160 SEHV225LO-160 SEHV250LO-160
200 SEHV100LO-200 SEHV125LO-200 SEHV160LO-200 SEHV200LO-200 SEHV225LO-200 SEHV250LO-200
250 SEHV100LO-250 SEHV125LO-250 SEHV160LO-250 SEHV200LO-250 SEHV225LO-250 SEHV250LO-250

 

SEHV Gear Ratio: 63~250 MHI HASEG Worm Gear Reducer SEHV  Series Size
100 125 160 200 225 250
Output Shaft Arrangement：Left 63 SEHV100LU-63 SEHV125LU-63 SEHV160LU-63 SEHV200LU-63 SEHV225LU-63 SEHV250LU-63
80 SEHV100LU-80 SEHV125LU-80 SEHV160LU-80 SEHV200LU-80 SEHV225LU-80 SEHV250LU-80
100 SEHV100LU-100 SEHV125LU-100 SEHV160LU-100 SEHV200LU-100 SEHV225LU-100 SEHV250LU-100
125 SEHV100LU-125 SEHV125LU-125 SEHV160LU-125 SEHV200LU-125 SEHV225LU-125 SEHV250LU-125
160 SEHV100LU-160 SEHV125LU-160 SEHV160LU-160 SEHV200LU-160 SEHV225LU-160 SEHV250LU-160
200 SEHV100LU-200 SEHV125LU-200 SEHV160LU-200 SEHV200LU-200 SEHV225LU-200 SEHV250LU-200
250 SEHV100LU-250 SEHV125LU-250 SEHV160LU-250 SEHV200LU-250 SEHV225LU-250 SEHV250LU-250

 

SEHV Gear Ratio: 63~250 MHI HASEG Worm Gear Reducer SEHV  Series Size
100 125 160 200 225 250
Output Shaft Arrangement：Left 63 SEHV100LB-63 SEHV125LB-63 SEHV160LB-63 SEHV200LB-63 SEHV225LB-63 SEHV250LB-63
80 SEHV100LB-80 SEHV125LB-80 SEHV160LB-80 SEHV200LB-80 SEHV225LB-80 SEHV250LB-80
100 SEHV100LB-100 SEHV125LB-100 SEHV160LB-100 SEHV200LB-100 SEHV225LB-100 SEHV250LB-100
125 SEHV100LB-125 SEHV125LB-125 SEHV160LB-125 SEHV200LB-125 SEHV225LB-125 SEHV250LB-125
160 SEHV100LB-160 SEHV125LB-160 SEHV160LB-160 SEHV200LB-160 SEHV225LB-160 SEHV250LB-160
200 SEHV100LB-200 SEHV125LB-200 SEHV160LB-200 SEHV200LB-200 SEHV225LB-200 SEHV250LB-200
250 SEHV100LB-250 SEHV125LB-250 SEHV160LB-250 SEHV200LB-250 SEHV225LB-250 SEHV250LB-250

 

MHI HASEG Worm Gear Reducer SEHV  Series Size：100~250（Output Shaft Arrangement：Right）

 

SEHV Gear Ratio: 63~250 MHI HASEG Worm Gear Reducer SEHV  Series Size
100 125 160 200 225 250
Output Shaft Arrangement：Right 63 SEHV100RO-63 SEHV125RO-63 SEHV160RO-63 SEHV200RO-63 SEHV225RO-63 SEHV250RO-63
80 SEHV100RO-80 SEHV125RO-80 SEHV160RO-80 SEHV200RO-80 SEHV225RO-80 SEHV250RO-80
100 SEHV100RO-100 SEHV125RO-100 SEHV160RO-100 SEHV200RO-100 SEHV225RO-100 SEHV250RO-100
125 SEHV100RO-125 SEHV125RO-125 SEHV160RO-125 SEHV200RO-125 SEHV225RO-125 SEHV250RO-125
160 SEHV100RO-160 SEHV125RO-160 SEHV160RO-160 SEHV200RO-160 SEHV225RO-160 SEHV250RO-160
200 SEHV100RO-200 SEHV125RO-200 SEHV160RO-200 SEHV200RO-200 SEHV225RO-200 SEHV250RO-200
250 SEHV100RO-250 SEHV125RO-250 SEHV160RO-250 SEHV200RO-250 SEHV225RO-250 SEHV250RO-250

 

SEHV Gear Ratio: 63~250 MHI HASEG Worm Gear Reducer SEHV  Series Size
100 125 160 200 225 250
Output Shaft Arrangement：Right 63 SEHV100RU-63 SEHV125RU-63 SEHV160RU-63 SEHV200RU-63 SEHV225RU-63 SEHV250RU-63
80 SEHV100RU-80 SEHV125RU-80 SEHV160RU-80 SEHV200RU-80 SEHV225RU-80 SEHV250RU-80
100 SEHV100RU-100 SEHV125RU-100 SEHV160RU-100 SEHV200RU-100 SEHV225RU-100 SEHV250RU-100
125 SEHV100RU-125 SEHV125RU-125 SEHV160RU-125 SEHV200RU-125 SEHV225RU-125 SEHV250RU-125
160 SEHV100RU-160 SEHV125RU-160 SEHV160RU-160 SEHV200RU-160 SEHV225RU-160 SEHV250RU-160
200 SEHV100RU-200 SEHV125RU-200 SEHV160RU-200 SEHV200RU-200 SEHV225RU-200 SEHV250RU-200
250 SEHV100RU-250 SEHV125RU-250 SEHV160RU-250 SEHV200RU-250 SEHV225RU-250 SEHV250RU-250

 

SEHV Gear Ratio: 63~250 MHI HASEG Worm Gear Reducer SEHV  Series Size
100 125 160 200 225 250
Output Shaft Arrangement：Right 63 SEHV100RB-63 SEHV125RB-63 SEHV160RB-63 SEHV200RB-63 SEHV225RB-63 SEHV250RB-63
80 SEHV100RB-80 SEHV125RB-80 SEHV160RB-80 SEHV200RB-80 SEHV225RB-80 SEHV250RB-80
100 SEHV100RB-100 SEHV125RB-100 SEHV160RB-100 SEHV200RB-100 SEHV225RB-100 SEHV250RB-100
125 SEHV100RB-125 SEHV125RB-125 SEHV160RB-125 SEHV200RB-125 SEHV225RB-125 SEHV250RB-125
160 SEHV100RB-160 SEHV125RB-160 SEHV160RB-160 SEHV200RB-160 SEHV225RB-160 SEHV250RB-160
200 SEHV100RB-200 SEHV125RB-200 SEHV160RB-200 SEHV200RB-200 SEHV225RB-200 SEHV250RB-200
250 SEHV100RB-250 SEHV125RB-250 SEHV160RB-250 SEHV200RB-250 SEHV225RB-250 SEHV250RB-250

 

 

MHI HASEG Worm Gear Reducer SEHV  Series Size：280~500（Output Shaft Arrangement：Left）

 

SEHV Gear Ratio: 63~250 MHI HASEG Worm Gear Reducer SEHV  Series Size
280 320 360 400 450 500
Output Shaft Arrangement：Left 63 SEHV280LO-63 SEHV320LO-63 SEHV360LO-63 SEHV400LO-63 SEHV450LO-63 SEHV500LO-63
80 SEHV280LO-80 SEHV320LO-80 SEHV360LO-80 SEHV400LO-80 SEHV450LO-80 SEHV500LO-80
100 SEHV280LO-100 SEHV320LO-100 SEHV360LO-100 SEHV400LO-100 SEHV450LO-100 SEHV500LO-100
125 SEHV280LO-125 SEHV320LO-125 SEHV360LO-125 SEHV400LO-125 SEHV450LO-125 SEHV500LO-125
160 SEHV280LO-160 SEHV320LO-160 SEHV360LO-160 SEHV400LO-160 SEHV450LO-160 SEHV500LO-160
200 SEHV280LO-200 SEHV320LO-200 SEHV360LO-200 SEHV400LO-200 SEHV450LO-200 SEHV500LO-200
250 SEHV280LO-250 SEHV320LO-250 SEHV360LO-250 SEHV400LO-250 SEHV450LO-250 SEHV500LO-250

 

SEHV Gear Ratio: 63~250 MHI HASEG Worm Gear Reducer SEHV  Series Size
280 320 360 400 450 500
Output Shaft Arrangement：Left 63 SEHV280LU-63 SEHV320LU-63 SEHV360LU-63 SEHV400LU-63 SEHV450LU-63 SEHV500LU-63
80 SEHV280LU-80 SEHV320LU-80 SEHV360LU-80 SEHV400LU-80 SEHV450LU-80 SEHV500LU-80
100 SEHV280LU-100 SEHV320LU-100 SEHV360LU-100 SEHV400LU-100 SEHV450LU-100 SEHV500LU-100
125 SEHV280LU-125 SEHV320LU-125 SEHV360LU-125 SEHV400LU-125 SEHV450LU-125 SEHV500LU-125
160 SEHV280LU-160 SEHV320LU-160 SEHV360LU-160 SEHV400LU-160 SEHV450LU-160 SEHV500LU-160
200 SEHV280LU-200 SEHV320LU-200 SEHV360LU-200 SEHV400LU-200 SEHV450LU-200 SEHV500LU-200
250 SEHV280LU-250 SEHV320LU-250 SEHV360LU-250 SEHV400LU-250 SEHV450LU-250 SEHV500LU-250

 

SEHV Gear Ratio: 63~250 MHI HASEG Worm Gear Reducer SEHV  Series Size
280 320 360 400 450 500
Output Shaft Arrangement：Left 63 SEHV280LB-63 SEHV320LB-63 SEHV360LB-63 SEHV400LB-63 SEHV450LB-63 SEHV500LB-63
80 SEHV280LB-80 SEHV320LB-80 SEHV360LB-80 SEHV400LB-80 SEHV450LB-80 SEHV500LB-80
100 SEHV280LB-100 SEHV320LB-100 SEHV360LB-100 SEHV400LB-100 SEHV450LB-100 SEHV500LB-100
125 SEHV280LB-125 SEHV320LB-125 SEHV360LB-125 SEHV400LB-125 SEHV450LB-125 SEHV500LB-125
160 SEHV280LB-160 SEHV320LB-160 SEHV360LB-160 SEHV400LB-160 SEHV450LB-160 SEHV500LB-160
200 SEHV280LB-200 SEHV320LB-200 SEHV360LB-200 SEHV400LB-200 SEHV450LB-200 SEHV500LB-200
250 SEHV280LB-250 SEHV320LB-250 SEHV360LB-250 SEHV400LB-250 SEHV450LB-250 SEHV500LB-250

 

MHI HASEG Worm Gear Reducer SEHV  Series Size：280~500（Output Shaft Arrangement：Right）

 

SEHV Gear Ratio: 63~250 MHI HASEG Worm Gear Reducer SEHV  Series Size
280 320 360 400 450 500
Output Shaft Arrangement：Right 63 SEHV280RO-63 SEHV320RO-63 SEHV360RO-63 SEHV400RO-63 SEHV450RO-63 SEHV500RO-63
80 SEHV280RO-80 SEHV320RO-80 SEHV360RO-80 SEHV400RO-80 SEHV450RO-80 SEHV500RO-80
100 SEHV280RO-100 SEHV320RO-100 SEHV360RO-100 SEHV400RO-100 SEHV450RO-100 SEHV500RO-100
125 SEHV280RO-125 SEHV320RO-125 SEHV360RO-125 SEHV400RO-125 SEHV450RO-125 SEHV500RO-125
160 SEHV280RO-160 SEHV320RO-160 SEHV360RO-160 SEHV400RO-160 SEHV450RO-160 SEHV500RO-160
200 SEHV280RO-200 SEHV320RO-200 SEHV360RO-200 SEHV400RO-200 SEHV450RO-200 SEHV500RO-200
250 SEHV280RO-250 SEHV320RO-250 SEHV360RO-250 SEHV400RO-250 SEHV450RO-250 SEHV500RO-250

 

SEHV Gear Ratio: 63~250 MHI HASEG Worm Gear Reducer SEHV  Series Size
280 320 360 400 450 500
Output Shaft Arrangement：Right 63 SEHV280RU-63 SEHV320RU-63 SEHV360RU-63 SEHV400RU-63 SEHV450RU-63 SEHV500RU-63
80 SEHV280RU-80 SEHV320RU-80 SEHV360RU-80 SEHV400RU-80 SEHV450RU-80 SEHV500RU-80
100 SEHV280RU-100 SEHV320RU-100 SEHV360RU-100 SEHV400RU-100 SEHV450RU-100 SEHV500RU-100
125 SEHV280RU-125 SEHV320RU-125 SEHV360RU-125 SEHV400RU-125 SEHV450RU-125 SEHV500RU-125
160 SEHV280RU-160 SEHV320RU-160 SEHV360RU-160 SEHV400RU-160 SEHV450RU-160 SEHV500RU-160
200 SEHV280RU-200 SEHV320RU-200 SEHV360RU-200 SEHV400RU-200 SEHV450RU-200 SEHV500RU-200
250 SEHV280RU-250 SEHV320RU-250 SEHV360RU-250 SEHV400RU-250 SEHV450RU-250 SEHV500RU-250

 

SEHV Gear Ratio: 63~250 MHI HASEG Worm Gear Reducer SEHV  Series Size
280 320 360 400 450 500
Output Shaft Arrangement：Right 63 SEHV280RB-63 SEHV320RB-63 SEHV360RB-63 SEHV400RB-63 SEHV450RB-63 SEHV500RB-63
80 SEHV280RB-80 SEHV320RB-80 SEHV360RB-80 SEHV400RB-80 SEHV450RB-80 SEHV500RB-80
100 SEHV280RB-100 SEHV320RB-100 SEHV360RB-100 SEHV400RB-100 SEHV450RB-100 SEHV500RB-100
125 SEHV280RB-125 SEHV320RB-125 SEHV360RB-125 SEHV400RB-125 SEHV450RB-125 SEHV500RB-125
160 SEHV280RB-160 SEHV320RB-160 SEHV360RB-160 SEHV400RB-160 SEHV450RB-160 SEHV500RB-160
200 SEHV280RB-200 SEHV320RB-200 SEHV360RB-200 SEHV400RB-200 SEHV450RB-200 SEHV500RB-200
250 SEHV280RB-250 SEHV320RB-250 SEHV360RB-250 SEHV400RB-250 SEHV450RB-250 SEHV500RB-250

 
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  • The MHI HASEG Worm Gear Reducer SEHV100L-63 offers high performance with a significant reduction ratio and robust torque capacity. Its durable construction, high efficiency, and reliability make it a valuable component for heavy machinery, material handling systems, and various industrial applications. Supported by MHI HASEG’s expertise, this gear reducer ensures dependable operation and minimal maintenance.

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  • The MHI HASEG Worm Gear Reducer SEHV100R-63 is a reliable and efficient gear reducer designed for a variety of industrial applications. With its high efficiency, durable construction, and easy maintenance, it is well-suited for optimizing mechanical systems in diverse environments. Comprehensive after-sales support from HMI HASEG CO., LTD. and distribution through Melink Automation ensure expert assistance, timely repairs, and ongoing service, guaranteeing the long-term performance and reliability of the gear reducer. Additionally, reliable shipping and delivery options provided by Melink Automation ensure that customers receive their products promptly and in excellent condition, contributing to a seamless purchasing experience.

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