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RD Series Worm Gear Speed Reducer

The RD Series is a versatile right-angle cast-iron worm-gear speed reducer designed for competitor-replacement applications. It drops into the footprints you already use.

The RD Series is a versatile right-angle cast-iron worm-gear speed reducer designed for competitor-replacement applications. It drops into the footprints you already use.

RD Series Advantages

WinGuard™ 316 Stainless Epoxy Coating

  • Stainless flake creates a tough corrosion barrier
  • Exceeds 1,000 hours of salt spray testing
  • Standard on every RD
  • Stands up to wet, harsh, and outdoor conditions

Washdown Ready Design

  • Smoother exterior profile of housing supports easier washdown with fewer areas where dirt, debris, or moisture can accumulate
  • H1 food-grade Mobil Glygoyle 460 synthetic lubricant
  • Strong fit for food processing and sanitary applications

Universal Lubricant Level

  • One lubricant level for all mounting positions, including motor down
  • Simplifies installation by being ready for install out of the box
  • Helps reduce setup errors

Industry-Standard Interchange Dimensions

  • Dimensionally interchangeable with industry-standard right-angle reducers
  • Drops into existing footprints with confidence
  • Supports fast replacement without redesign

Modular Design

  • Thousands of configurations available without custom work
  • Broad coverage for a wide range of applications
  • Helps speed specification and replacement

5-Day Lead Time

  • Standard configurations ship within 5 days of ordering
  • Helps reduce the risk of downtime
  • Keeps availability aligned with production needs

Premium Robust Gearing

  • Tough, durable gearing for harsh environments
  • Engineered for reliable performance
  • Up to 97% efficiency

RD Max Speed Reducer – Upgrade Option

Need more corrosion protection? The RD Max adds stainless-steel output shafts to the entire RD Line for improved corrosion resistance in wet, aggressive washdown environments. It also includes x-ray and magnetically detectable food-safety blue plugs, IP66 certification, and a stainless-steel nameplate.

Technical Specifications
Use the specs below to match the RD to your load, speed, and motors requirements. Dimensions are shown in inches (in) with metric conversions provided for reference.
Specifications Rating
Center Distances 1.33 to 3.00 in (34 to 76 mm)
Standard Ratios 5:1 to 100:1
Input Power Rating 0.11 to 10.87 HP (0.08 to 8.10 kW)
Output Torque Rating Up to 4,573 lbf-in (517 N·m)
Gearing Efficiency Up to 97%
Lubrication H1 food-grade Mobil Glygoyle 460 synthetic
Coating WinGuard 316 Stainless Epoxy <1,000+ hr salt spray tested)
Warranty 24 months
Other ratios available upon request.
Other ratios available upon request. Note: Metric values are conversions and are provided for reference. For full torque, ratio, and dimensional data by size, download the SE Encore catalog below.
Download the RD Catalog

How to Read Your Nameplate

Replacing an existing unit? Your nameplate tells you what you have and tells our team exactly what you need. The part number identifies the unit size, shaft arrangement, ratio, and input configuration of your RD. Read the tag carefully to confirm the right replacement before you order.
What the code tells you:

  • Unit size – Identifies the physical size of the unit.
  • Ratio- Indicates the ratio of reduction of the unit
  • Shaft Arrangement – Indicates whether the output shaft is hollow or solid.
  • Input Configuration – Identifies the input style and motor connection arrangement

For output torque, refer to the catalog; the part number alone does not specify torque.
Not sure what you’re looking at? Send us a photo of the nameplate and we’ll confirm the correct interchange.

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Frequently Asked Questions

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