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The MHI HASEG Worm Gear Reducer SCUH Series is a two‑stage, horizontal‑shaft worm‑gear reducer with a hollow‑output design, engineered for applications that demand high reduction ratios, space‑saving installation, and self‑locking safety. Combining MHI HASEG’s precision Niemann tooth profile with robust materials and a compact housing, the SCUH Series delivers smooth, efficient torque transmission and easy integration into conveyor systems, rotary indexing tables, and automated assembly lines.

Key Features
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Two‑Stage Hollow‑Output Design
Dual worm gear stages provide high reduction ratios (iₙ = 63 – 250) in a compact, horizontal footprint. The hollow output shaft allows direct mounting of driven components, eliminating couplings and saving space.
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Precision Niemann Tooth Profile
Concave‑convex gear flanks maximize tooth contact and oil film retention, reducing wear, minimizing friction losses, and ensuring whisper‑quiet operation under load.
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Built‑In Self‑Locking
Low lead‑angle worm gears in both stages prevent back‑driving, providing inherent load‑holding capability without external brakes—ideal for safety‑critical and positioning applications.
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Durable Construction
Hardened alloy‑steel worm shafts and high‑strength bronze worm wheels withstand radial and axial shock loads. Cast‑iron housing maintains alignment and rigidity under heavy duty.
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Efficient Lubrication & Maintenance
Standard splash lubrication using Klüber SYNTHESO HT or GH6 oils protects gears in both stages. Accessible oil‑level sight glasses, filler/drain ports, and external grease nipples simplify routine servicing.
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JIS‑Compliant Dimensions
All mounting faces, shaft fits, and tolerances meet JIS B1301‑1976 standards for straightforward integration and interchangeability.
Typical Specifications
Specification
|
SCUH Series
|
| Center Distance (mm) |
100, 125, 160, 200, 225, 250, 280, 320, 360, 450, 500 |
| Reduction Ratios (iₙ) |
315, 630, 1000, 1250, 1600 |
| Max Input Speed (n₁, min⁻¹) |
Up to 1 800 |
| Rated Output Torque (T₂N) |
Size-dependent (consult catalog) |
| Efficiency (η) |
Up to 80–85 % |
| Lubrication |
Splash (standard); forced optional |
| Housing Material |
Cast iron |
| Operating Temperature |
–10 °C to +40 °C |
| Protection Class |
IP54 (standard) |
Applications
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Rotary Indexing Tables: Precise, back‑drive‑free positioning.
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Conveyor Drives: High‑ratio, space‑efficient speed reduction.
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Automated Assembly: Compact, direct‑drive integration.
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Packaging Machinery: Quiet, durable torque control.
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Material Handling Equipment: Added safety with self‑locking.
For detailed torque curves, dimensional drawings, and selection support, contact Melink Automation, your trusted distributor of the MHI HASEG Worm Gear Reducer SCUH Series.
MHI HASEG Worm Gear Reducer SCUH Series Size:100~250(Output Shaft Arrangement:Left)
| SCUH |
Gear Ratio: 315~1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size |
| 100 |
125 |
160 |
200 |
225 |
250 |
| Output Shaft Arrangement:Left |
315 |
SCUH100LR-315 |
SCUH125LR-315 |
SCUH160LR-315 |
SCUH200LR-315 |
SCUH225LR-315 |
SCUH250LR-315 |
| 630 |
SCUH100LR-630 |
SCUH125LR-630 |
SCUH160LR-630 |
SCUH200LR-630 |
SCUH225LR-630 |
SCUH250LR-630 |
| 1000 |
SCUH100LR-1000 |
SCUH125LR-1000 |
SCUH160LR-1000 |
SCUH200LR-1000 |
SCUH225LR-1000 |
SCUH250LR-1000 |
| 1250 |
SCUH100LR-1250 |
SCUH125LR-1250 |
SCUH160LR-1250 |
SCUH200LR-1250 |
SCUH225LR-1250 |
SCUH250LR-1250 |
| 1600 |
SCUH100LR-1600 |
SCUH125LR-1600 |
SCUH160LR-1600 |
SCUH200LR-1600 |
SCUH225LR-1600 |
SCUH250LR-1600 |
| SCUH |
Gear Ratio: 315~1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size |
| 100 |
125 |
160 |
200 |
225 |
250 |
| Output Shaft Arrangement:Left |
315 |
SCUH100LL-315 |
SCUH125LL-315 |
SCUH160LL-315 |
SCUH200LL-315 |
SCUH225LL-315 |
SCUH250LL-315 |
| 630 |
SCUH100LL-630 |
SCUH125LL-630 |
SCUH160LL-630 |
SCUH200LL-630 |
SCUH225LL-630 |
SCUH250LL-630 |
| 1000 |
SCUH100LL-1000 |
SCUH125LL-1000 |
SCUH160LL-1000 |
SCUH200LL-1000 |
SCUH225LL-1000 |
SCUH250LL-1000 |
| 1250 |
SCUH100LL-1250 |
SCUH125LL-1250 |
SCUH160LL-1250 |
SCUH200LL-1250 |
SCUH225LL-1250 |
SCUH250LL-1250 |
| 1600 |
SCUH100LL-1600 |
SCUH125LL-1600 |
SCUH160LL-1600 |
SCUH200LL-1600 |
SCUH225LL-1600 |
SCUH250LL-1600 |
| SCUH |
Gear Ratio: 315~1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size |
| 100 |
125 |
160 |
200 |
225 |
250 |
| Output Shaft Arrangement:Left |
315 |
SCUH100LB-315 |
SCUH125LB-315 |
SCUH160LB-315 |
SCUH200LB-315 |
SCUH225LB-315 |
SCUH250LB-315 |
| 630 |
SCUH100LB-630 |
SCUH125LB-630 |
SCUH160LB-630 |
SCUH200LB-630 |
SCUH225LB-630 |
SCUH250LB-630 |
| 1000 |
SCUH100LB-1000 |
SCUH125LB-1000 |
SCUH160LB-1000 |
SCUH200LB-1000 |
SCUH225LB-1000 |
SCUH250LB-1000 |
| 1250 |
SCUH100LB-1250 |
SCUH125LB-1250 |
SCUH160LB-1250 |
SCUH200LB-1250 |
SCUH225LB-1250 |
SCUH250LB-1250 |
| 1600 |
SCUH100LB-1600 |
SCUH125LB-1600 |
SCUH160LB-1600 |
SCUH200LB-1600 |
SCUH225LB-1600 |
SCUH250LB-1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size:100~250(Output Shaft Arrangement:Right)
| SCUH |
Gear Ratio: 315~1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size |
| 100 |
125 |
160 |
200 |
225 |
250 |
| Output Shaft Arrangement:Right |
315 |
SCUH100RR-315 |
SCUH125RR-315 |
SCUH160RR-315 |
SCUH200RR-315 |
SCUH225RR-315 |
SCUH250RR-315 |
| 630 |
SCUH100RR-630 |
SCUH125RR-630 |
SCUH160RR-630 |
SCUH200RR-630 |
SCUH225RR-630 |
SCUH250RR-630 |
| 1000 |
SCUH100RR-1000 |
SCUH125RR-1000 |
SCUH160RR-1000 |
SCUH200RR-1000 |
SCUH225RR-1000 |
SCUH250RR-1000 |
| 1250 |
SCUH100RR-1250 |
SCUH125RR-1250 |
SCUH160RR-1250 |
SCUH200RR-1250 |
SCUH225RR-1250 |
SCUH250RR-1250 |
| 1600 |
SCUH100RR-1600 |
SCUH125RR-1600 |
SCUH160RR-1600 |
SCUH200RR-1600 |
SCUH225RR-1600 |
SCUH250RR-1600 |
| SCUH |
Gear Ratio: 315~1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size |
| 100 |
125 |
160 |
200 |
225 |
250 |
| Output Shaft Arrangement:Right |
315 |
SCUH100RL-315 |
SCUH125RL-315 |
SCUH160RL-315 |
SCUH200RL-315 |
SCUH225RL-315 |
SCUH250RL-315 |
| 630 |
SCUH100RL-630 |
SCUH125RL-630 |
SCUH160RL-630 |
SCUH200RL-630 |
SCUH225RL-630 |
SCUH250RL-630 |
| 1000 |
SCUH100RL-1000 |
SCUH125RL-1000 |
SCUH160RL-1000 |
SCUH200RL-1000 |
SCUH225RL-1000 |
SCUH250RL-1000 |
| 1250 |
SCUH100RL-1250 |
SCUH125RL-1250 |
SCUH160RL-1250 |
SCUH200RL-1250 |
SCUH225RL-1250 |
SCUH250RL-1250 |
| 1600 |
SCUH100RL-1600 |
SCUH125RL-1600 |
SCUH160RL-1600 |
SCUH200RL-1600 |
SCUH225RL-1600 |
SCUH250RL-1600 |
| SCUH |
Gear Ratio: 315~1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size |
| 100 |
125 |
160 |
200 |
225 |
250 |
| Output Shaft Arrangement:Right |
315 |
SCUH100RB-315 |
SCUH125RB-315 |
SCUH160RB-315 |
SCUH200RB-315 |
SCUH225RB-315 |
SCUH250RB-315 |
| 630 |
SCUH100RB-630 |
SCUH125RB-630 |
SCUH160RB-630 |
SCUH200RB-630 |
SCUH225RB-630 |
SCUH250RB-630 |
| 1000 |
SCUH100RB-1000 |
SCUH125RB-1000 |
SCUH160RB-1000 |
SCUH200RB-1000 |
SCUH225RB-1000 |
SCUH250RB-1000 |
| 1250 |
SCUH100RB-1250 |
SCUH125RB-1250 |
SCUH160RB-1250 |
SCUH200RB-1250 |
SCUH225RB-1250 |
SCUH250RB-1250 |
| 1600 |
SCUH100RB-1600 |
SCUH125RB-1600 |
SCUH160RB-1600 |
SCUH200RB-1600 |
SCUH225RB-1600 |
SCUH250RB-1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size:280~500(Output Shaft Arrangement:Left)
| SCUH |
Gear Ratio: 315~1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size |
| 280 |
320 |
360 |
400 |
450 |
500 |
| Output Shaft Arrangement:Left |
315 |
SCUH280LR-315 |
SCUH320LR-315 |
SCUH360LR-315 |
SCUH400LR-315 |
SCUH450LR-315 |
SCUH500LR-315 |
| 630 |
SCUH280LR-630 |
SCUH320LR-630 |
SCUH360LR-630 |
SCUH400LR-630 |
SCUH450LR-630 |
SCUH500LR-630 |
| 1000 |
SCUH280LR-1000 |
SCUH320LR-1000 |
SCUH360LR-1000 |
SCUH400LR-1000 |
SCUH450LR-1000 |
SCUH500LR-1000 |
| 1250 |
SCUH280LR-1250 |
SCUH320LR-1250 |
SCUH360LR-1250 |
SCUH400LR-1250 |
SCUH450LR-1250 |
SCUH500LR-1250 |
| 1600 |
SCUH280LR-1600 |
SCUH320LR-1600 |
SCUH360LR-1600 |
SCUH400LR-1600 |
SCUH450LR-1600 |
SCUH500LR-1600 |
| SCUH |
Gear Ratio: 315~1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size |
| 280 |
320 |
360 |
400 |
450 |
500 |
| Output Shaft Arrangement:Left |
315 |
SCUH280LL-315 |
SCUH320LL-315 |
SCUH360LL-315 |
SCUH400LL-315 |
SCUH450LL-315 |
SCUH500LL-315 |
| 630 |
SCUH280LL-630 |
SCUH320LL-630 |
SCUH360LL-630 |
SCUH400LL-630 |
SCUH450LL-630 |
SCUH500LL-630 |
| 1000 |
SCUH280LL-1000 |
SCUH320LL-1000 |
SCUH360LL-1000 |
SCUH400LL-1000 |
SCUH450LL-1000 |
SCUH500LL-1000 |
| 1250 |
SCUH280LL-1250 |
SCUH320LL-1250 |
SCUH360LL-1250 |
SCUH400LL-1250 |
SCUH450LL-1250 |
SCUH500LL-1250 |
| 1600 |
SCUH280LL-1600 |
SCUH320LL-1600 |
SCUH360LL-1600 |
SCUH400LL-1600 |
SCUH450LL-1600 |
SCUH500LL-1600 |
| SCUH |
Gear Ratio: 315~1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size |
| 280 |
320 |
360 |
400 |
450 |
500 |
| Output Shaft Arrangement:Left |
315 |
SCUH280LB-315 |
SCUH320LB-315 |
SCUH360LB-315 |
SCUH400LB-315 |
SCUH450LB-315 |
SCUH500LB-315 |
| 630 |
SCUH280LB-630 |
SCUH320LB-630 |
SCUH360LB-630 |
SCUH400LB-630 |
SCUH450LB-630 |
SCUH500LB-630 |
| 1000 |
SCUH280LB-1000 |
SCUH320LB-1000 |
SCUH360LB-1000 |
SCUH400LB-1000 |
SCUH450LB-1000 |
SCUH500LB-1000 |
| 1250 |
SCUH280LB-1250 |
SCUH320LB-1250 |
SCUH360LB-1250 |
SCUH400LB-1250 |
SCUH450LB-1250 |
SCUH500LB-1250 |
| 1600 |
SCUH280LB-1600 |
SCUH320LB-1600 |
SCUH360LB-1600 |
SCUH400LB-1600 |
SCUH450LB-1600 |
SCUH500LB-1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size:280~500(Output Shaft Arrangement:Right)
| SCUH |
Gear Ratio: 315~1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size |
| 280 |
320 |
360 |
400 |
450 |
500 |
| Output Shaft Arrangement:Right |
315 |
SCUH280RR-315 |
SCUH320RR-315 |
SCUH360RR-315 |
SCUH400RR-315 |
SCUH450RR-315 |
SCUH500RR-315 |
| 630 |
SCUH280RR-630 |
SCUH320RR-630 |
SCUH360RR-630 |
SCUH400RR-630 |
SCUH450RR-630 |
SCUH500RR-630 |
| 1000 |
SCUH280RR-1000 |
SCUH320RR-1000 |
SCUH360RR-1000 |
SCUH400RR-1000 |
SCUH450RR-1000 |
SCUH500RR-1000 |
| 1250 |
SCUH280RR-1250 |
SCUH320RR-1250 |
SCUH360RR-1250 |
SCUH400RR-1250 |
SCUH450RR-1250 |
SCUH500RR-1250 |
| 1600 |
SCUH280RR-1600 |
SCUH320RR-1600 |
SCUH360RR-1600 |
SCUH400RR-1600 |
SCUH450RR-1600 |
SCUH500RR-1600 |
| SCUH |
Gear Ratio: 315~1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size |
| 280 |
320 |
360 |
400 |
450 |
500 |
| Output Shaft Arrangement:Right |
315 |
SCUH280RL-315 |
SCUH320RL-315 |
SCUH360RL-315 |
SCUH400RL-315 |
SCUH450RL-315 |
SCUH500RL-315 |
| 630 |
SCUH280RL-630 |
SCUH320RL-630 |
SCUH360RL-630 |
SCUH400RL-630 |
SCUH450RL-630 |
SCUH500RL-630 |
| 1000 |
SCUH280RL-1000 |
SCUH320RL-1000 |
SCUH360RL-1000 |
SCUH400RL-1000 |
SCUH450RL-1000 |
SCUH500RL-1000 |
| 1250 |
SCUH280RL-1250 |
SCUH320RL-1250 |
SCUH360RL-1250 |
SCUH400RL-1250 |
SCUH450RL-1250 |
SCUH500RL-1250 |
| 1600 |
SCUH280RL-1600 |
SCUH320RL-1600 |
SCUH360RL-1600 |
SCUH400RL-1600 |
SCUH450RL-1600 |
SCUH500RL-1600 |
| SCUH |
Gear Ratio: 315~1600 |
MHI HASEG Worm Gear Reducer SCUH Series Size |
| 280 |
320 |
360 |
400 |
450 |
500 |
| Output Shaft Arrangement:Right |
315 |
SCUH280RB-315 |
SCUH320RB-315 |
SCUH360RB-315 |
SCUH400RB-315 |
SCUH450RB-315 |
SCUH500RB-315 |
| 630 |
SCUH280RB-630 |
SCUH320RB-630 |
SCUH360RB-630 |
SCUH400RB-630 |
SCUH450RB-630 |
SCUH500RB-630 |
| 1000 |
SCUH280RB-1000 |
SCUH320RB-1000 |
SCUH360RB-1000 |
SCUH400RB-1000 |
SCUH450RB-1000 |
SCUH500RB-1000 |
| 1250 |
SCUH280RB-1250 |
SCUH320RB-1250 |
SCUH360RB-1250 |
SCUH400RB-1250 |
SCUH450RB-1250 |
SCUH500RB-1250 |
| 1600 |
SCUH280RB-1600 |
SCUH320RB-1600 |
SCUH360RB-1600 |
SCUH400RB-1600 |
SCUH450RB-1600 |
SCUH500RB-1600 |
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