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Home > Products > Niemann Worm Gear Sets > MHI HASEG Worm Gear Set SROR Series

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MHI HASEG Worm Gear Set SROR Series

The MHI HASEG Worm Gear Set SROR Series is a precision-engineered, modular worm-and-worm-wheel kit designed for OEMs and machine builders who require a matched gear set for custom gearbox housings or retrofit applications. Featuring MHI HASEG’s proprietary Niemann concave–convex tooth profile, the SROR Series delivers exceptional torque capacity, smooth meshing, and reliable self-locking performance in a compact, versatile format.

 

SRMR-SROR.png

 

Key Features

  1. Matched Worm & Wheel Set

    Each SROR Series kit includes a hardened alloy-steel worm shaft and a complementary high-strength bronze worm wheel, pre-selected for ideal tooth engagement and minimal backlash.

  2. Advanced Niemann Tooth Profile

    The concave–convex geometry maximizes load-bearing surface, improves oil-film retention, and minimizes surface stress—ensuring up to 90 % transmission efficiency and whisper-quiet operation.

  3. Wide Range of Ratios & Sizes

    Available for center distances from 125 mm to 500 mm and standard reduction ratios from 5:1 to 50:1, the SROR Series adapts to diverse torque and speed requirements.

  4. Built-In Self-Locking

    Low lead-angle configurations provide inherent back-drive prevention, offering mechanical holding power for lifting, indexing, or safety-critical functions without external brakes.

  5. OEM-Friendly Integration

    Modular design lets engineers install the SROR Series into custom housings, specifying module size, bore diameters, and mounting features to match exact application needs.

  6. High-Precision Manufacturing

    All components undergo strict quality control, with finish-machined tooth surfaces to tight tolerances, ensuring smooth engagement under load and long service life.

Typical Specifications

Specification

 SROR Series
Center Distance (mm) 125, 160, 200, 225, 250, 280, 320, 360, 400, 450, 500
Reduction Ratios (iₙ) 5, 6.3, 8, 10, 12.5, 16, 20, 25, 31.5, 40, 50
Rated Torque (T₂N, Nm) 180 – 20 000 Nm (size-dependent)
Max Input Speed (n₁, min⁻¹) Up to 1 800
Efficiency (η) Up to 90 % (single-stage)
Materials Alloy steel (worm) / Bronze (wheel)
Operating Temperature –10 °C to +40 °C
Self-Locking Lead Angle ≤ 5° (application-dependent)
 

Applications

  • Custom Gearboxes: Core gearing for bespoke reducer designs.

  • Robotics & Automation: Smooth, backlash-minimized motion control.

  • Lifting & Positioning: Self-locking for secure load holding.

  • Rotary Tables & Indexers: Quiet, precise indexing drives.

  • Machine Tools: Durable drive sets for intermittent or continuous duty.

Why Choose the SROR Series?

  • Design Versatility: Configure center distance, ratio, and bore to your exact needs.

  • Proven Performance: Niemann profile ensures durability, efficiency, and low noise.

  • Space-Efficient: Matched set fits compact housings without compromise.

  • Safety-Built: Inherent self-locking reduces reliance on external brakes.

  • Global Support: Backed by Melink Automation’s technical expertise and MHI HASEG’s legendary quality.

For CAD models, detailed dimensions, and engineering support on the MHI HASEG Worm Gear Set SROR Series, please contact your Melink Automation representative.

 

 

MHI HASEG Worm Gear Set: SROR

 

Size MHI HASEG Worm Gear Set: Gear Ratio: 5~50
5 6.3 8 10 12.5 16 20 25 31.5 40 50
65 - - - - - - - - - - -
80 - - - - - - - - - - -
100 - - - - - - - - - - -
125 SROR SROR SROR SROR SROR SROR SROR SROR SROR SROR SROR
160 SROR SROR SROR SROR SROR SROR SROR SROR SROR SROR SROR
200 SROR SROR SROR SROR SROR SROR SROR SROR SROR SROR SROR
225 - SROR SROR SROR SROR SROR SROR SROR SROR SROR SROR
250 SROR SROR SROR SROR SROR SROR SROR SROR SROR SROR SROR
280 - - - SROR SROR SROR SROR SROR SROR SROR SROR
320 - - - SROR SROR SROR SROR SROR SROR SROR SROR
360 - - - SROR SROR SROR SROR SROR SROR SROR SROR
400 - - - SROR SROR SROR SROR SROR SROR SROR SROR
450 - - - SROR SROR SROR SROR SROR SROR SROR SROR
500 - - - SROR SROR SROR SROR SROR SROR SROR SROR

 

MHI HASEG Worm Gear Set: SROR Series Size：125~250

 

SROR Gear Ratio: 5~50 MHI HASEG Worm Gear Set: SROR Series Size
100 125 160 200 225 250
5 - SROR125-5 SROR160-5 SROR200-5 - SROR250-5
6.3 - SROR125-6.3 SROR160-6.3 SROR200-6.3 SROR225-6.3 SROR250-6.3
8 - SROR125-8 SROR160-8 SROR200-8 SROR225-8 SROR250-8
10 - SROR125-10 SROR160-10 SROR200-10 SROR225-10 SROR250-10
12.5 - SROR125-12.5 SROR160-12.5 SROR200-12.5 SROR225-12.5 SROR250-12.5
16 - SROR125-16 SROR160-16 SROR200-16 SROR225-16 SROR250-16
20 - SROR125-20 SROR160-20 SROR200-20 SROR225-20 SROR250-20
25 - SROR125-25 SROR160-25 SROR200-25 SROR225-25 SROR250-25
31.5 - SROR125-31.5 SROR160-31.5 SROR200-31.5 SROR225-31.5 SROR250-31.5
40 - SROR125-40 SROR160-40 SROR200-40 SROR225-40 SROR250-40
50 - SROR125-50 SROR160-50 SROR200-50 SROR225-50 SROR250-50

 

MHI HASEG Worm Gear Set: SROR Series Size：280~500

 

SROR Gear Ratio: 5~50 MHI HASEG Worm Gear Set: SROR Series Size
280 320 360 400 450 500
5 - - - - - -
6.3 - - - - - -
8 - - - - - -
10 SROR280-10 SROR320-10 SROR360-10 SROR400-10 SROR450-10 SROR500-10
12.5 SROR280-12.5 SROR320-12.5 SROR360-12.5 SROR400-12.5 SROR450-12.5 SROR500-12.5
16 SROR280-16 SROR320-16 SROR360-16 SROR400-16 SROR450-16 SROR500-16
20 SROR280-20 SROR320-20 SROR360-20 SROR400-20 SROR450-20 SROR500-20
25 SROR280-25 SROR320-25 SROR360-25 SROR400-25 SROR450-25 SROR500-25
31.5 SROR280-31.5 SROR320-31.5 SROR360-31.5 SROR400-31.5 SROR450-31.5 SROR500-31.5
40 SROR280-40 SROR320-40 SROR360-40 SROR400-40 SROR450-40 SROR500-40
50 SROR280-50 SROR320-50 SROR360-50 SROR400-50 SROR450-50 SROR500-50

 
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