The SEW-EURODRIVE MC2RLSF04 is a heavy-duty, bevel-helical industrial gear unit designed for high-torque applications. The model name "MC" stands for Modular Compact, a series specifically engineered to provide high power density in a small footprint, bridging the gap between standard geared motors and massive industrial drives.
1. Decoding the Model: MC2RLSF04
Understanding the specific configuration of this unit is essential for correct procurement:
- MC: Modular Compact series (Industrial Gear Unit).
- 2: Two-stage reduction (primary helical and secondary bevel stages).
- R: Bevel-helical (Right-angle) configuration.
- L: Horizontal mounting position.
- S: Solid shaft output (as opposed to "H" for hollow shaft).
- F: Flange-mounted design (B5 type flange for direct machine integration).
- 04: Frame size (Size 04 typically handles nominal output torques from 6,000 Nm to 12,000 Nm).
2. Pricing and Availability (2026 Guidelines)
SEW-EURODRIVE does not typically publish a standard retail "Price List" for the MC series because these units are Assemble-to-Order (ATO). Prices vary significantly based on the gear ratio, service factor, and optional add-ons.
- Estimated Price Range: For a base MC2RLSF04 unit (excluding the motor), prices generally range from $4,500 to $8,500 USD (€4,200 – €7,800), depending on the internal configuration and regional logistics.
- Motor Integration: When paired with an AC motor (e.g., DRN.. series 15kW–30kW), the total assembly price can increase by $1,500 to $3,500 USD.
- Factors Affecting Cost:Gear Ratio ($i$): Higher ratios requiring more precise tooth geometry can increase costs.Sealing Systems: Special Taconite or Regreaseable seals for dusty environments (mining/cement) add a premium.Cooling Options: Integrated fans or oil-water coolers are additional costs.
3. Technical Specifications & Features
The MC2RLSF04 is favored in the Bulk Material Handling and Chemical industries for its ruggedness.
| Feature | Technical Advantage |
| Monoblock Housing | Extreme structural rigidity prevents gear misalignment under heavy shock loads. |
| High Efficiency | Typical mechanical efficiency of 94%–97% per stage, reducing energy costs. |
| Solid Shaft (S) | Ideal for applications using couplings, sprockets, or heavy-duty chain drives. |
| Right-Angle Design | Allows the motor to be positioned perpendicular to the driven shaft, saving space on conveyor lines. |
4. Motor and Brake Integration
This gearbox is frequently paired with a Brake Motor for safety in hoisting or inclined conveyor applications.
- Brake Rectifiers: To operate the DC brake from the AC motor supply, a rectifier (e.g., BME, BMP, or BMK) is installed in the motor terminal box or control cabinet.
- Control: High-cycle applications often use the BMK (fast-acting) rectifier to ensure the brake releases and engages with millisecond precision, preventing "brake drag" that can overheat the motor.
5. Application Focus
The MC2RLSF04 size is commonly found in:
- Belt Conveyors: Driving primary intake or discharge belts.
- Agitators/Mixers: Often used with the flange (F) mount for overhead mounting.
- Bucket Elevators: Utilizing the high torque capacity for vertical lifting of heavy bulk solids.
Pro-Tip for Procurement: When requesting a quote, always provide the Serial Number (found on the nameplate) if you are looking for a replacement. If it is a new project, specify the required output torque ($M_{a}$) and output speed ($n_{a}$) to ensure the internal gear ratio is optimized for your motor’s $RPM$.
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