Flender H2SH07 Industrial Helical Gearbox
The Flender H2SH07 is a benchmark 2-stage parallel shaft helical industrial gearbox engineered for global heavy-duty power transmission[cite: 22]. Featuring a universal modular housing design, optimized gear tooth geometry, high thermal capacity, and low noise operation[cite: 22], the Flender H series is available in 1, 2, 3, and 4-stage reductions (H1, H2, H3, H4) covering sizes 03 through 26 with nominal torques up to 1,400,000 Nm[cite: 22]. It is widely applied in heavy conveyorship, mining equipment, cement production lines, water treatment agitators, cranes, paper mills, and sugar processing drives[cite: 22].
Technical Specifications
| Model / Part Number | H2SH07 (2-Stage Parallel Shaft Helical, Size 07 Frame)[cite: 22] |
|---|---|
| Brand / Manufacturer | Flender GmbH (Siemens AG)[cite: 22] |
| Gear Unit Architecture | 1-Stage (H1), 2-Stage (H2), 3-Stage (H3), 4-Stage (H4) Parallel Shaft Helical[cite: 22] |
| Nominal Torque Output | Up to 1,400,000 Nm (Full Series Range Size 03 to 26)[cite: 22] |
| Gear Ratio Range (i) | 1.25 to 450 (Standard Catalog Ratios)[cite: 22] |
| Output Shaft Execution | Solid Shaft with Parallel Key (S/H), Hollow Shaft with Shrink Disc (D), Hollow Shaft with Keyway (H/A), Splined Hollow Shaft (K)[cite: 22] |
| Housing Construction | Heavy Cast Iron (Horizontal or Vertical Mounting)[cite: 22] |
Documentation & Resources
Flender H Series Modular Architecture Matrix
Full-range structural configuration guide for Flender H series parallel shaft helical industrial gearboxes[cite: 22]. Review supported reduction stages, shaft executions, mounting layouts, and cooling packages:
| Gear Unit Layout & Stage Designation | Frame Sizes Covered | Nominal Torque Output (Nm) | Standard Factory Accessories & Cooling |
|---|---|---|---|
| H1SH / H1HH (1-Stage Parallel Helical)[cite: 22] | Size 03 to Size 26 (24 Sizes)[cite: 22] | Up to 1,400,000 Nm[cite: 22] | /Fan (Axial Cooling Fan) |
| H2SH / H2HH / H2DH (2-Stage Parallel Helical)[cite: 22] | Size 04 to Size 26 (23 Sizes)[cite: 22] | Up to 1,400,000 Nm[cite: 22] | /Cool-W (Water/Oil Heat Exchanger) |
| H3SH / H3HH / H3DH (3-Stage Parallel Helical)[cite: 22] | Size 05 to Size 26 (22 Sizes)[cite: 22] | Up to 1,400,000 Nm[cite: 22] | /Backstop (Mechanical Non-Return) |
| H4SH / H4HH / H4DH (4-Stage Parallel Helical)[cite: 22] | Size 07 to Size 26 (20 Sizes)[cite: 22] | Up to 1,400,000 Nm[cite: 22] | /Pump (Forced Pressure Oil Lubrication) |
| Hollow Shaft Splines (K Series)[cite: 22] | Size 05 to Size 16[cite: 22] | Up to 220,000 Nm[cite: 22] | /Heater (Oil Sump Heating Element) |
Legacy Flender Gearbox Replacement & H Series Upgrade Guide
Obsolete Flender or Siemens gear units installed on industrial drivetrains can be directly replaced with current H Series parallel shaft gearboxes[cite: 22]. Refer to the cross-reference mapping below for 1-to-1 retrofitting:
| Legacy Flender Gearbox Model | Original Gear Unit Type | Current H Series Equivalent | Frame Size & Torque Capacity | Mechanical Fit & Retrofit Engineering Notes |
|---|---|---|---|---|
| Flender H2SH04 / H2SH05[cite: 22] | 2-Stage Parallel Helical[cite: 22] | H2SH04 / H2SH05 Current Standard[cite: 22] | Size 04/05 / High Torque Density[cite: 22] | Direct 1-to-1 shaft centerline & footprint match[cite: 22]. |
| Flender H2SH07 / H2SH08[cite: 22] | 2-Stage Parallel Helical[cite: 22] | H2SH07 / H2SH08 Current Standard[cite: 22] | Size 07/08 / Benchmark Mining Drive[cite: 22] | Identical mounting dimensions & output shaft specs[cite: 22]. |
| Flender H3SH10 / H3SH12[cite: 22] | 3-Stage Parallel Helical[cite: 22] | H3SH10 / H3SH12 Current Standard[cite: 22] | Size 10/12 / Heavy Conveyor Reducer[cite: 22] | Preserves base bolt pattern & input motor flange[cite: 22]. |
| Flender H4SH14 / H4SH16[cite: 22] | 4-Stage Parallel Helical[cite: 22] | H4SH14 / H4SH16 Current Standard[cite: 22] | Size 14/16 / High Ratio Industrial Unit[cite: 22] | Drop-in replacement for high-reduction drives[cite: 22]. |
| Legacy Hollow Shaft Units (H..H)[cite: 22] | Hollow Shaft Keyway[cite: 22] | H2DH / H3DH Shrink Disc Modern Clamp[cite: 22] | Size 04 to Size 18[cite: 22] | Shrink disc execution provides 100% fretting-free connection[cite: 22]. |
Expert Selection & Retrofit Engineering Notes
When retrofitting an existing drivetrain featuring older H1SH03, H2SH07, H3SH10, or Siemens Flender gearboxes[cite: 22], choosing original H Series units ensures complete 1-to-1 mechanical interchangeability without modifying foundation steelwork or drive shafts[cite: 22]. Simply supply us with your existing Flender serial number or nameplate data, and our engineering team will deliver a 100% compliant replacement specification and proposal[cite: 22].
Core Benchmark Model Standard Configurations
- H1SH03[cite: 22]
- H1SH05[cite: 22]
- H2SH04[cite: 22]
- H2SH05[cite: 22]
- H2SH07[cite: 22]
- H2SH08[cite: 22]
- H2SH10[cite: 22]
- H2SH12[cite: 22]
- H3SH08[cite: 22]
- H3SH10[cite: 22]
- H3SH12[cite: 22]
- H3SH14[cite: 22]
- H4SH12[cite: 22]
- H4SH16[cite: 22]
- H2DH07 (Shrink Disc)[cite: 22]
- H3DH08 (Shrink Disc)[cite: 22]
- H2HH07 (Keyway Hollow)[cite: 22]
- H3HH10 (Keyway Hollow)[cite: 22]
- H2KH08 (Splined Shaft)[cite: 22]
- H3KH12 (Splined Shaft)[cite: 22]
