Bauer BK Series Helical Bevel Geared Motors
The Bauer BK Series (featured model: BK30-34/D09SA4 0.75 kW IE3) is the flagship right-angle helical bevel geared motor from Bauer Gear Motor, setting the global benchmark for high transmission efficiency, wear-free bevel gear operation, and compact right-angle drive layouts. Featuring standard IP65 total enclosure protection (IP66, IP67, and IP68 submersed protection optional), BK series gearmotors are completely dust-tight and resistant to high-pressure water jets. Engineered with proprietary compact right-angle dimensions, hollow output shaft bore options, and specialized rubber-buffered torque arm assemblies, Bauer BK units offer unmatched irreplaceability in overhead cranes, hoists, roller conveyors, and packaging equipment. Covering motor power ratings from 0.03 kW to 45 kW across 10 frame sizes (BK06 to BK90), the BK series seamlessly integrates with modern **IE3 Premium Efficiency motors** (D09 to D18) to replace legacy Bauer D series and older IE1/IE2 motors in severe industrial environments.
Technical Specifications
| Featured Model | BK30-34/D09SA4 (Size BK30, 2/3-Stage Helical Bevel, 0.75 kW IE3 Premium Efficiency Motor) |
|---|---|
| Brand / Manufacturer | Bauer Gear Motor (Altra Industrial Motion / Regal Rexnord) |
| Product Series | BK Series Helical Bevel Right-Angle Geared Motors |
| Frame Sizes Covered | BK06, BK10, BK20, BK30, BK40, BK50, BK60, BK70, BK80, BK90 (10 Sizes) |
| Enclosure Protection Class | IP65 Standard (IP66, IP67 & IP68 Submersed Protection Optional) |
| Nominal Torque Output | 80 Nm to 18,500 Nm (Full Series Transmissible Torque Capacity) |
| Motor Power Ratings | 0.03 kW to 45.0 kW (IE3 Premium Efficiency D.. Series Motors) |
| Shaft & Mounting Options | Hollow Shaft with Keyway, Hollow Shaft with Shrink Disc, Solid Shaft, Torque Arm, Flange B5/B14 |
Documentation & Resources
Bauer BK Series Frame Size & Motor Power Matching Matrix
Full selection matrix for Bauer BK series helical bevel right-angle geared motors. Review torque capacity, allowable overhung loads, and matched motor power across 10 frame sizes:
| Bauer Frame Size | Max Output Torque (Nm) | Matched Motor Power (kW) | Matched Bauer Motor Frame (IE3) | Standard Hollow Shaft Bore (mm) |
|---|---|---|---|---|
| BK06 | 80 Nm | 0.03 kW - 0.55 kW | D04, D05, D06, D07, D08 | 20 mm / 25 mm hollow shaft |
| BK10 | 170 Nm | 0.09 kW - 1.1 kW | D05, D06, D07, D08, D09S | 25 mm / 30 mm hollow shaft |
| BK20 | 330 Nm | 0.12 kW - 2.2 kW | D06, D07, D08, D09, D10 | 30 mm / 35 mm hollow shaft |
| BK30 | 630 Nm | 0.25 kW - 5.5 kW | D07, D08, D09SA4 (IE3), D11 | 35 mm / 40 mm hollow shaft |
| BK40 | 1,120 Nm | 0.55 kW - 9.2 kW | D08, D09LA4 (IE3), D11, D13 | 40 mm / 50 mm hollow shaft |
| BK50 | 2,050 Nm | 1.1 kW - 15.0 kW | D09, D11SA4 (IE3), D13, D16 | 50 mm / 60 mm hollow shaft |
| BK60 | 3,500 Nm | 1.5 kW - 22.0 kW | D11MA4 (IE3), D13, D16, D18 | 60 mm / 70 mm hollow shaft |
| BK70 to BK90 | 6,400 Nm - 18,500 Nm | 4.0 kW - 45.0 kW | D13, D16, D18, D22 Heavy Duty | 70 mm to 100 mm hollow shaft |
Legacy Bauer D Series to BK Series IE3 Premium Efficiency Upgrade Guide
Obsolete Bauer D Series right-angle bevel gearmotors (D06, D08, D10, D20, D30) can be upgraded to modern BK 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 BK IE3 Equivalent Model | Current IE3 Motor Frame | Mechanical Compatibility & Retrofit Notes |
|---|---|---|---|---|
| Bauer D06-34 / D08-34 | D04 / D05 Motor | Bauer BK06-34/D05LA4 100% Drop-In | D05LA4 (IE3) | Direct 1:1 drop-in replacement. Fits 25mm hollow shaft & IP65 enclosure. |
| Bauer D10-34 / D12-34 | D06 / D07 Motor | Bauer BK10-34/D08MA4 100% Drop-In | D08MA4 (IE3) | Identical torque arm rubber buffer mounting and 30mm hollow shaft bore. |
| Bauer D20-34 / D22-34 | D08 Motor | Bauer BK20-34/D08MA4 100% Drop-In | D08MA4 (IE3) | Matches 35mm hollow shaft. IE3 motor reduces power consumption up to 12%. |
| Bauer D30-34 / D32-34 | D09 Motor | Bauer BK30-34/D09SA4 IE3 Upgrade | D09SA4 (IE3 Premium) | Direct replacement for 0.75 kW crane drives. 40mm hollow shaft bore. |
| Bauer D40-34 / D42-34 | D09 / D11 Motor | Bauer BK40-34/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 D Series right-angle gearmotors on existing production lines, switching to current BK 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., BK30-34/D09SA4/IP65), and our technical team will deliver a 100% compliant replacement specification and proposal.
Core Benchmark Model Standard Configurations
- BK06-34/D04LA4 (0.09 kW)
- BK06-34/D05LA4 (0.18 kW)
- BK10-34/D06LA4 (0.25 kW)
- BK10-34/D08MA4 (0.55 kW)
- BK20-34/D08MA4 (0.55 kW)
- BK20-34/D09SA4 (0.75 kW IE3)
- BK30-34/D09SA4 (0.75 kW IE3)
- BK30-34/D09LA4 (1.5 kW IE3)
- BK40-34/D09LA4 (1.5 kW IE3)
- BK40-34/D11SA4 (2.2 kW IE3)
- BK50-34/D11SA4 (2.2 kW IE3)
- BK50-34/D11MA4 (4.0 kW IE3)
- BK60-34/D11MA4 (4.0 kW IE3)
- BK60-34/D13MA4 (5.5 kW IE3)
- BKF30-34/D09SA4 (B5 Flange)
- BKF40-34/D09LA4 (B5 Flange)
- Bauer D06-34 Replacement
- Bauer D10-34 Replacement
- Bauer D20-34 Replacement
- Bauer D30-34 Replacement
