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The MHI HASEG Worm Gear Reducer SEUH Seriesis a compact, two‑stage vertical‑shaft worm‑gear reducer designed for light‑duty applications where space is at a premium but high reduction ratios and reliable self‑locking are required. Featuring MHI HASEG’s precision Niemann tooth profile, the SEUH Series delivers smooth, quiet torque transmission, inherent back‑drive prevention, and simplified maintenance for vertical drives in automation and lifting equipment.

Key Features
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Two‑Stage Vertical Shaft Design
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Dual worm stages yield high reduction ratios (iₙ = 63 – 250) in a minimal footprint, perfect for compact vertical installations.
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Each stage’s oil chamber and lubrication points are isolated to ensure proper gear protection under all operating conditions.
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Advanced Niemann Tooth Profile
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Built‑In Self‑Locking
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Low lead‑angle worm gears in both stages prevent back‑driving, providing mechanical holding power without external brakes—ideal for vertical load‑holding, indexing, and safety‑critical applications.
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Compact & Lightweight
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The vertical arrangement minimizes overall height and footprint, making it suitable for small mixers, lift modules, rotary tables, and other space‑constrained systems.
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Quiet, Vibration‑Free Operation
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Maintenance‑Friendly Lubrication
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Splash lubrication using Klüber SYNTHESO HT or GH6 oil ensures continuous gear protection.
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Oil‑level sight glasses, filler and drain plugs, and grease nipples are easily accessible, reducing downtime for routine service.
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JIS‑Standard Compliance
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Housing dimensions, shaft fits, and tolerances adhere to JIS B1301‑1976, ensuring interchangeability and straightforward integration with existing equipment.
Typical Specifications
Specification
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SEUH Series
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| Shaft Orientation |
Vertical (input or 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) |
180 – 750 Nm (size‑dependent) |
| Max Input Speed (n₁, min⁻¹) |
Up to 1 800 |
| Efficiency (η) |
Up to 80–85 % (two‑stage) |
| Lubrication |
Splash (Klüber SYNTHESO HT/GH6) |
| Housing Material |
Cast iron |
| Operating Temperature |
–10 °C to +40 °C |
| Protection Class |
IP54 (standard) |
Applications
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Vertical Lifts & Hoists: Secure, self‑locking torque for load‑holding.
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Rotary Tables & Indexers: Precise positioning and back‑drive protection.
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Compact Automation: High‑reduction drive in minimal space.
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Laboratory & Medical Devices: Low‑noise, vibration‑free operation.
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Small Mixers & Agitators: Direct vertical drive with reliable self‑locking.
Why Choose the SEUH Series?
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High‑Ratio in Small Footprint: Up to 250:1 reduction in a compact vertical layout.
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Durable & Efficient: Niemann profile and quality materials ensure long service life.
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Safety‑Built: Inherent self‑locking eliminates unintended reverse motion.
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Ease of Service: Accessible lubrication points and JIS‑compliant design simplify maintenance.
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Expert Support: Backed by Melink Automation’s local service and MHI HASEG’s global engineering expertise.
For torque charts, dimensional drawings, or selection assistance, contact Melink Automation, your trusted distributor of the MHI HASEG Worm Gear Reducer SEUH Series.
MHI HASEG Worm Gear Reducer SEUH Series Size:100~250(Output Shaft Arrangement:Left)
| SEUH |
Gear Ratio: 63~250 |
MHI HASEG Worm Gear Reducer SEUH Series Size |
| 100 |
125 |
160 |
200 |
225 |
250 |
| Output Shaft Arrangement:Left |
63 |
SEUH100L-63 |
SEUH125L-63 |
SEUH160L-63 |
SEUH200L-63 |
SEUH225L-63 |
SEUH250L-63 |
| 80 |
SEUH100L-80 |
SEUH125L-80 |
SEUH160L-80 |
SEUH200L-80 |
SEUH225L-80 |
SEUH250L-80 |
| 100 |
SEUH100L-100 |
SEUH125L-100 |
SEUH160L-100 |
SEUH200L-100 |
SEUH225L-100 |
SEUH250L-100 |
| 125 |
SEUH100L-125 |
SEUH125L-125 |
SEUH160L-125 |
SEUH200L-125 |
SEUH225L-125 |
SEUH250L-125 |
| 160 |
SEUH100L-160 |
SEUH125L-160 |
SEUH160L-160 |
SEUH200L-160 |
SEUH225L-160 |
SEUH250L-160 |
| 200 |
SEUH100L-200 |
SEUH125L-200 |
SEUH160L-200 |
SEUH200L-200 |
SEUH225L-200 |
SEUH250L-200 |
| 250 |
SEUH100L-250 |
SEUH125L-250 |
SEUH160L-250 |
SEUH200L-250 |
SEUH225L-250 |
SEUH250L-250 |
MHI HASEG Worm Gear Reducer SEUH Series Size:100~250(Output Shaft Arrangement:Right)
| SEUH |
Gear Ratio: 63~250 |
MHI HASEG Worm Gear Reducer SEUH Series Size |
| 100 |
125 |
160 |
200 |
225 |
250 |
| Output Shaft Arrangement:Right |
63 |
SEUH100R-63 |
SEUH125R-63 |
SEUH160R-63 |
SEUH200R-63 |
SEUH225R-63 |
SEUH250R-63 |
| 80 |
SEUH100R-80 |
SEUH125R-80 |
SEUH160R-80 |
SEUH200R-80 |
SEUH225R-80 |
SEUH250R-80 |
| 100 |
SEUH100R-100 |
SEUH125R-100 |
SEUH160R-100 |
SEUH200R-100 |
SEUH225R-100 |
SEUH250R-100 |
| 125 |
SEUH100R-125 |
SEUH125R-125 |
SEUH160R-125 |
SEUH200R-125 |
SEUH225R-125 |
SEUH250R-125 |
| 160 |
SEUH100R-160 |
SEUH125R-160 |
SEUH160R-160 |
SEUH200R-160 |
SEUH225R-160 |
SEUH250R-160 |
| 200 |
SEUH100R-200 |
SEUH125R-200 |
SEUH160R-200 |
SEUH200R-200 |
SEUH225R-200 |
SEUH250R-200 |
| 250 |
SEUH100R-250 |
SEUH125R-250 |
SEUH160R-250 |
SEUH200R-250 |
SEUH225R-250 |
SEUH250R-250 |
| SEUH |
Gear Ratio: 63~250 |
MHI HASEG Worm Gear Reducer SEUH Series Size |
| 100 |
125 |
160 |
200 |
225 |
250 |
| |
63 |
SEUH100B-63 |
SEUH125B-63 |
SEUH160B-63 |
SEUH200B-63 |
SEUH225B-63 |
SEUH250B-63 |
| 80 |
SEUH100B-80 |
SEUH125B-80 |
SEUH160B-80 |
SEUH200B-80 |
SEUH225B-80 |
SEUH250B-80 |
| 100 |
SEUH100B-100 |
SEUH125B-100 |
SEUH160B-100 |
SEUH200B-100 |
SEUH225B-100 |
SEUH250B-100 |
| 125 |
SEUH100B-125 |
SEUH125B-125 |
SEUH160B-125 |
SEUH200B-125 |
SEUH225B-125 |
SEUH250B-125 |
| 160 |
SEUH100B-160 |
SEUH125B-160 |
SEUH160B-160 |
SEUH200B-160 |
SEUH225B-160 |
SEUH250B-160 |
| 200 |
SEUH100B-200 |
SEUH125B-200 |
SEUH160B-200 |
SEUH200B-200 |
SEUH225B-200 |
SEUH250B-200 |
| 250 |
SEUH100B-250 |
SEUH125B-250 |
SEUH160B-250 |
SEUH200B-250 |
SEUH225B-250 |
SEUH250B-250 |
MHI HASEG Worm Gear Reducer SEUH Series Size:280~500(Output Shaft Arrangement:Left)
| SEUH |
Gear Ratio: 63~250 |
MHI HASEG Worm Gear Reducer SEUH Series Size |
| 280 |
320 |
360 |
400 |
450 |
500 |
| Output Shaft Arrangement:Left |
63 |
SEUH280L-63 |
SEUH320L-63 |
SEUH360L-63 |
SEUH400L-63 |
SEUH450L-63 |
SEUH500L-63 |
| 80 |
SEUH280L-80 |
SEUH320L-80 |
SEUH360L-80 |
SEUH400L-80 |
SEUH450L-80 |
SEUH500L-80 |
| 100 |
SEUH280L-100 |
SEUH320L-100 |
SEUH360L-100 |
SEUH400L-100 |
SEUH450L-100 |
SEUH500L-100 |
| 125 |
SEUH280L-125 |
SEUH320L-125 |
SEUH360L-125 |
SEUH400L-125 |
SEUH450L-125 |
SEUH500L-125 |
| 160 |
SEUH280L-160 |
SEUH320L-160 |
SEUH360L-160 |
SEUH400L-160 |
SEUH450L-160 |
SEUH500L-160 |
| 200 |
SEUH280L-200 |
SEUH320L-200 |
SEUH360L-200 |
SEUH400L-200 |
SEUH450L-200 |
SEUH500L-200 |
| 250 |
SEUH280L-250 |
SEUH320L-250 |
SEUH360L-250 |
SEUH400L-250 |
SEUH450L-250 |
SEUH500L-250 |
MHI HASEG Worm Gear Reducer SEUH Series Size:280~500(Output Shaft Arrangement:Right)
| SEUH |
Gear Ratio: 63~250 |
MHI HASEG Worm Gear Reducer SEUH Series Size |
| 280 |
320 |
360 |
400 |
450 |
500 |
| Output Shaft Arrangement:Right |
63 |
SEUH280R-63 |
SEUH320R-63 |
SEUH360R-63 |
SEUH400R-63 |
SEUH450R-63 |
SEUH500R-63 |
| 80 |
SEUH280R-80 |
SEUH320R-80 |
SEUH360R-80 |
SEUH400R-80 |
SEUH450R-80 |
SEUH500R-80 |
| 100 |
SEUH280R-100 |
SEUH320R-100 |
SEUH360R-100 |
SEUH400R-100 |
SEUH450R-100 |
SEUH500R-100 |
| 125 |
SEUH280R-125 |
SEUH320R-125 |
SEUH360R-125 |
SEUH400R-125 |
SEUH450R-125 |
SEUH500R-125 |
| 160 |
SEUH280R-160 |
SEUH320R-160 |
SEUH360R-160 |
SEUH400R-160 |
SEUH450R-160 |
SEUH500R-160 |
| 200 |
SEUH280R-200 |
SEUH320R-200 |
SEUH360R-200 |
SEUH400R-200 |
SEUH450R-200 |
SEUH500R-200 |
| 250 |
SEUH280R-250 |
SEUH320R-250 |
SEUH360R-250 |
SEUH400R-250 |
SEUH450R-250 |
SEUH500R-250 |
| SEUH |
Gear Ratio: 63~250 |
MHI HASEG Worm Gear Reducer SEUH Series Size |
| 280 |
320 |
360 |
400 |
450 |
500 |
| |
63 |
SEUH280B-63 |
SEUH320B-63 |
SEUH360B-63 |
SEUH400B-63 |
SEUH450B-63 |
SEUH500B-63 |
| 80 |
SEUH280B-80 |
SEUH320B-80 |
SEUH360B-80 |
SEUH400B-80 |
SEUH450B-80 |
SEUH500B-80 |
| 100 |
SEUH280B-100 |
SEUH320B-100 |
SEUH360B-100 |
SEUH400B-100 |
SEUH450B-100 |
SEUH500B-100 |
| 125 |
SEUH280B-125 |
SEUH320B-125 |
SEUH360B-125 |
SEUH400B-125 |
SEUH450B-125 |
SEUH500B-125 |
| 160 |
SEUH280B-160 |
SEUH320B-160 |
SEUH360B-160 |
SEUH400B-160 |
SEUH450B-160 |
SEUH500B-160 |
| 200 |
SEUH280B-200 |
SEUH320B-200 |
SEUH360B-200 |
SEUH400B-200 |
SEUH450B-200 |
SEUH500B-200 |
| 250 |
SEUH280B-250 |
SEUH320B-250 |
SEUH360B-250 |
SEUH400B-250 |
SEUH450B-250 |
SEUH500B-250 |
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