Bauer BG Series Coaxial Helical Geared Motors
The Bauer BG Series (featured model: BG30-34/D09SA4 0.75 kW IE3) is the flagship coaxial inline helical geared motor from Bauer Gear Motor, setting the global standard for mechanical durability, energy efficiency, and extreme environmental sealing. Featuring standard IP65 total enclosure protection (IP66, IP67, and IP68 submersed protection optional), BG series gearmotors are completely dust-tight and resistant to high-pressure water jets. Engineered with proprietary compact axial dimensions and specialized foot/flange bolt patterns, Bauer BG units offer unmatched irreplaceability in legacy OEM equipment. Covering motor power ratings from 0.03 kW to 75 kW across 11 frame sizes (BG06 to BG100), the BG series seamlessly integrates with modern **IE3 Premium Efficiency motors** (D09 to D18) to replace legacy Bauer G series and older IE1/IE2 motors in cranes, wastewater clarifiers, roller conveyors, and food washdown facilities.
Technical Specifications
| Featured Model | BG30-34/D09SA4 (Size BG30, Ratio 1:34, 0.75 kW IE3 Premium Efficiency Motor) |
|---|---|
| Brand / Manufacturer | Bauer Gear Motor (Altra Industrial Motion / Regal Rexnord) |
| Product Series | BG Series Coaxial Helical Inline Geared Motors |
| Frame Sizes Covered | BG06, BG10, BG20, BG30, BG40, BG50, BG60, BG70, BG80, BG90, BG100 (11 Sizes) |
| Enclosure Protection Class | IP65 Standard (IP66, IP67 & IP68 Submersed Protection Optional) |
| Nominal Torque Output | 20 Nm to 18,500 Nm (Full Series Transmissible Torque Capacity) |
| Motor Power Ratings | 0.03 kW to 75.0 kW (IE3 Premium Efficiency D.. Series Motors) |
| Mounting & Shaft Options | Foot-mounted (B3), Flange-mounted (B5/B14), Solid Shaft with Keyway, Foot-Flange Combined |
Documentation & Resources
Bauer BG Series Frame Size & Motor Power Matching Matrix
Full selection matrix for Bauer BG series coaxial helical geared motors. Review torque capacity, allowable overhung loads, and matched motor power across 11 frame sizes:
| Bauer Frame Size | Max Output Torque (Nm) | Matched Motor Power (kW) | Matched Bauer Motor Frame (IE3) | Standard Shaft Diameter (mm) |
|---|---|---|---|---|
| BG06 | 60 Nm | 0.03 kW - 0.55 kW | D04, D05, D06, D07, D08 | 20 mm solid shaft |
| BG10 | 120 Nm | 0.09 kW - 1.1 kW | D05, D06, D07, D08, D09S | 25 mm solid shaft |
| BG20 | 230 Nm | 0.12 kW - 2.2 kW | D06, D07, D08, D09, D10 | 30 mm solid shaft |
| BG30 | 430 Nm | 0.25 kW - 5.5 kW | D07, D08, D09SA4 (IE3), D11 | 35 mm solid shaft |
| BG40 | 810 Nm | 0.55 kW - 9.2 kW | D08, D09LA4 (IE3), D11, D13 | 40 mm solid shaft |
| BG50 | 1,450 Nm | 1.1 kW - 15.0 kW | D09, D11SA4 (IE3), D13, D16 | 50 mm solid shaft |
| BG60 | 2,500 Nm | 1.5 kW - 22.0 kW | D11MA4 (IE3), D13, D16, D18 | 60 mm solid shaft |
| BG70 to BG100 | 4,800 Nm - 18,500 Nm | 4.0 kW - 75.0 kW | D13, D16, D18, D22 Heavy Duty | 70 mm to 110 mm solid shaft |
Legacy Bauer G Series to BG Series IE3 Premium Efficiency Upgrade Guide
Obsolete Bauer G Series gearmotors (G02, G03, G12, G22, G32) can be upgraded to modern BG Series gearmotors equipped with IE3 Premium Efficiency motors while preserving 100% exact mounting bolt centers:
| Legacy Bauer Model (Obsolete) | Legacy Motor Frame | Current BG IE3 Equivalent Model | Current IE3 Motor Frame | Mechanical Compatibility & Retrofit Notes |
|---|---|---|---|---|
| Bauer G02-20 / G02-31 | D04 / D05 Motor | Bauer BG06-31/D05LA4 100% Drop-In | D05LA4 (IE3) | Direct 1:1 drop-in replacement. Fits 20mm output shaft & IP65 enclosure. |
| Bauer G03-31 / G12-31 | D06 / D07 Motor | Bauer BG10-37/D08MA4 100% Drop-In | D08MA4 (IE3) | Identical foot bolt center-to-center distance and 25mm shaft height. |
| Bauer G22-31 / G22-37 | D08 Motor | Bauer BG20-31/D08MA4 100% Drop-In | D08MA4 (IE3) | Matches 30mm output shaft. IE3 motor reduces power consumption up to 12%. |
| Bauer G32-31 / G32-34 | D09 Motor | Bauer BG30-34/D09SA4 IE3 Upgrade | D09SA4 (IE3 Premium) | Direct replacement for 0.75 kW conveyor drives. 35mm solid shaft. |
| Bauer G42-31 / G42-34 | D09 / D11 Motor | Bauer BG40-34/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 G Series gearmotors on existing production lines, switching to current BG series models with IE3 Premium Efficiency motors guarantees 100% exact physical mounting alignment without modifying foundation plates or output shaft couplings. Simply supply us with your existing Bauer nameplate serial number (e.g., BG30-34/D09SA4/IP65), and our technical team will deliver a 100% compliant replacement specification and proposal.
Core Benchmark Model Standard Configurations
- BG06-31/D04LA4 (0.09 kW)
- BG06-31/D05LA4 (0.18 kW)
- BG10-37/D06LA4 (0.25 kW)
- BG10-37/D08MA4 (0.55 kW)
- BG20-31/D08MA4 (0.55 kW)
- BG20-31/D09SA4 (0.75 kW IE3)
- BG30-34/D09SA4 (0.75 kW IE3)
- BG30-34/D09LA4 (1.5 kW IE3)
- BG40-34/D09LA4 (1.5 kW IE3)
- BG40-34/D11SA4 (2.2 kW IE3)
- BG50-11/D11SA4 (2.2 kW IE3)
- BG50-11/D11MA4 (4.0 kW IE3)
- BG60-11/D11MA4 (4.0 kW IE3)
- BG60-11/D13MA4 (5.5 kW IE3)
- BGF30-34/D09SA4 (B5 Flange)
- BGF40-34/D09LA4 (B5 Flange)
- Bauer G02-31 Replacement
- Bauer G12-31 Replacement
- Bauer G22-31 Replacement
- Bauer G32-34 Replacement
