Bauer BS Series Helical Worm Geared Motors
The Bauer BS Series (featured model: BS10-31/D08MA4 0.55 kW IE3) is the benchmark economical right-angle helical worm geared motor from Bauer Gear Motor, setting the global standard for compact right-angle installation, high single-stage reduction ratios, and ultra-quiet acoustic performance. Featuring standard IP65 total enclosure protection (IP66, IP67, and IP68 submersed protection optional), BS series gearmotors are completely dust-tight and resistant to high-pressure water washdown. Engineered with proprietary compact right-angle dimensions, hollow output shaft bore options, and specialized rubber-buffered torque arm assemblies, Bauer BS units offer unmatched irreplaceability in light conveyors, stage machinery, packaging equipment, and food processing lines. Covering motor power ratings from 0.03 kW to 5.5 kW across 8 frame sizes (BS02 to BS40), the BS series seamlessly integrates with modern **IE3 Premium Efficiency motors** (D08 to D11) to replace legacy Bauer S series and older IE1/IE2 motors in severe industrial environments.
Technical Specifications
| Featured Model | BS10-31/D08MA4 (Size BS10, 2-Stage Helical Worm, 0.55 kW IE3 Premium Efficiency Motor) |
|---|---|
| Brand / Manufacturer | Bauer Gear Motor (Altra Industrial Motion / Regal Rexnord) |
| Product Series | BS Series Helical Worm Right-Angle Geared Motors |
| Frame Sizes Covered | BS02, BS03, BS04, BS06, BS10, BS20, BS30, BS40 (8 Sizes) |
| Enclosure Protection Class | IP65 Standard (IP66, IP67 & IP68 Submersed Protection Optional) |
| Nominal Torque Output | 25 Nm to 1,000 Nm (Full Series Transmissible Torque Capacity) |
| Motor Power Ratings | 0.03 kW to 5.5 kW (IE3 Premium Efficiency D.. Series Motors) |
| Shaft & Mounting Options | Hollow Shaft with Keyway, Solid Shaft, Rubber Buffer Torque Arm, Flange B5/B14 |
Documentation & Resources
Bauer BS Series Frame Size & Motor Power Matching Matrix
Full selection matrix for Bauer BS series helical worm right-angle geared motors. Review torque capacity, allowable overhung loads, and matched motor power across 8 frame sizes:
| Bauer Frame Size | Max Output Torque (Nm) | Matched Motor Power (kW) | Matched Bauer Motor Frame (IE3) | Standard Hollow Shaft Bore (mm) |
|---|---|---|---|---|
| BS02 | 25 Nm | 0.03 kW - 0.18 kW | D04, D05 | 15 mm / 20 mm hollow shaft |
| BS03 | 50 Nm | 0.06 kW - 0.25 kW | D04, D05, D06 | 20 mm / 25 mm hollow shaft |
| BS04 | 90 Nm | 0.09 kW - 0.37 kW | D05, D06, D07 | 20 mm / 25 mm hollow shaft |
| BS06 | 180 Nm | 0.12 kW - 0.75 kW | D06, D07, D08, D09S | 25 mm / 30 mm hollow shaft |
| BS10 | 320 Nm | 0.25 kW - 1.5 kW | D07, D08MA4 (IE3), D09LA4 | 30 mm / 35 mm hollow shaft |
| BS20 | 500 Nm | 0.55 kW - 2.2 kW | D08, D09SA4 (IE3), D11SA4 | 35 mm / 40 mm hollow shaft |
| BS30 | 750 Nm | 0.75 kW - 4.0 kW | D09SA4 (IE3), D11MA4 | 40 mm / 45 mm hollow shaft |
| BS40 | 1,000 Nm | 1.5 kW - 5.5 kW | D09LA4 (IE3), D11, D13 | 45 mm / 50 mm hollow shaft |
Legacy Bauer S Series to BS Series IE3 Premium Efficiency Upgrade Guide
Obsolete Bauer S Series right-angle worm gearmotors (S02, S03, S04, S06, S10, S20) can be upgraded to modern BS Series gearmotors equipped with IE3 Premium Efficiency motors while preserving 100% exact shaft centerlines and torque arm reaction points:
| Legacy Bauer Model (Obsolete) | Legacy Motor Frame | Current BS IE3 Equivalent Model | Current IE3 Motor Frame | Mechanical Compatibility & Retrofit Notes |
|---|---|---|---|---|
| Bauer S02-31 / S03-31 | D04 / D05 Motor | Bauer BS02-31/D05LA4 100% Drop-In | D05LA4 (IE3) | Direct 1:1 drop-in replacement. Fits 20mm hollow shaft & IP65 enclosure. |
| Bauer S04-31 / S06-31 | D06 / D07 Motor | Bauer BS06-31/D08MA4 100% Drop-In | D08MA4 (IE3) | Identical torque arm rubber buffer mounting and 25mm hollow shaft bore. |
| Bauer S10-31 / S12-31 | D08 Motor | Bauer BS10-31/D08MA4 100% Drop-In | D08MA4 (IE3) | Matches 30mm hollow shaft. IE3 motor reduces power consumption up to 12%. |
| Bauer S20-31 / S22-31 | D08 / D09 Motor | Bauer BS20-31/D09SA4 IE3 Upgrade | D09SA4 (IE3 Premium) | Direct replacement for 0.75 kW conveyor drives. 35mm hollow shaft bore. |
| Bauer S30-31 / S32-31 | D09 / D11 Motor | Bauer BS30-31/D09LA4 IE3 Upgrade | D09LA4 (IE3 Premium) | Direct replacement for 1.5 kW drives. Maintains IP65 standard enclosure. |
Expert Selection & Retrofit Engineering Notes
When replacing older Bauer S Series right-angle worm gearmotors on existing production lines, switching to current BS series models with IE3 Premium Efficiency motors guarantees 100% exact physical mounting alignment without modifying torque arm brackets or output shafts. Simply supply us with your existing Bauer nameplate serial number (e.g., BS10-31/D08MA4/IP65), and our technical team will deliver a 100% compliant replacement specification and proposal.
Core Benchmark Model Standard Configurations
- BS02-31/D04LA4 (0.06 kW)
- BS02-31/D05LA4 (0.12 kW)
- BS03-31/D05LA4 (0.18 kW)
- BS04-31/D06LA4 (0.25 kW)
- BS06-31/D06LA4 (0.25 kW)
- BS06-31/D08MA4 (0.55 kW)
- BS10-31/D08MA4 (0.55 kW)
- BS10-31/D09SA4 (0.75 kW IE3)
- BS20-31/D09SA4 (0.75 kW IE3)
- BS20-31/D09LA4 (1.5 kW IE3)
- BS30-31/D09LA4 (1.5 kW IE3)
- BS30-31/D11SA4 (2.2 kW IE3)
- BS40-31/D11SA4 (2.2 kW IE3)
- BS40-31/D11MA4 (4.0 kW IE3)
- BSF10-31/D08MA4 (B5 Flange)
- BSF20-31/D09SA4 (B5 Flange)
- Bauer S02-31 Replacement
- Bauer S06-31 Replacement
- Bauer S10-31 Replacement
- Bauer S20-31 Replacement
