Sumitomo HSM Shaft Mounted Helical Speed Reducers
The Sumitomo HSM Shaft Mounted Helical Speed Reducer Series (featured model: HSM207-25 25:1 Ratio Shaft Mount) is Sumitomo's heavy-duty shaft-mounted drive platform, engineered specifically for direct mounting onto driven equipment shafts in severe bulk material handling, aggregate processing, grain elevators, and mining belt conveyors. By eliminating foundation bedplates, couplings, and complex alignment procedures, HSM reducers deliver compact, high-torque power transmission directly at the head pulley shaft. Built with case-hardened, precision ground helical gearing and rugged cast-iron housings, HSM reducers offer standard nominal reduction ratios of **5:1, 14:1, 20:1, and 25:1**. Output shaft connection features Sumitomo's patented **Taper-Grip® keyless bushing system**—allowing easy installation and removal without fretting corrosion—as well as standard keyed hollow shafts. Equipped with integrated backstop options to prevent conveyor reversal, heavy-duty double-lip seals, and high overhung load capabilities, Sumitomo HSM reducers deliver a 100% direct mechanical replacement for legacy shaft-mounted gearboxes across global processing plants.
Technical Specifications
| Featured Model | HSM207-25 (Frame Size 207, Nominal Gear Ratio 25:1, Taper-Grip® Keyless Bushing Output, Backstop Ready) |
|---|---|
| Brand / Manufacturer | Sumitomo Drive Technologies (Sumitomo Heavy Industries) |
| Product Series | HSM Series Shaft Mounted Helical Speed Reducers |
| Frame Sizes Covered | HSM 107, HSM 115, HSM 203, HSM 207, HSM 215, HSM 303, HSM 307, HSM 315, HSM 407, HSM 415, HSM 507, HSM 515 |
| Output Torque Range | 1,000 Nm to 42,000 Nm (8,850 lb-in to 371,700 lb-in Continuous Output Torque) |
| Standard Gear Ratios | 5:1 (Single Reduction), 14:1, 20:1, 25:1 (Double Reduction Helical Gearing) |
| Shaft Connection Options | Patented Taper-Grip® Keyless Bushing System (Hollow Bore) & Standard Straight Keyed Hollow Bore |
| Accessories & Sealing | Integrated Internal Mechanical Backstop (Anti-Runback); Heavy-Duty Double-Lip Seals & Torque Arm Kit |
Documentation & Resources
Sumitomo HSM Frame Size, Ratio & Shaft Bore Matrix
Complete selection matrix for Sumitomo HSM shaft-mounted helical speed reducers. Review frame sizes, available ratios, max output torques, and standard hollow bore dimensions:
| HSM Frame Size | Nominal Ratios | Max Output Torque (Nm) | Max Taper-Grip® Bore | Max Keyed Hollow Bore | Sumitomo Model Code Example |
|---|---|---|---|---|---|
| HSM 107 | 5:1, 14:1, 20:1, 25:1 | 1,200 Nm | 45 mm / 1-15/16" | 50 mm / 2-3/16" | HSM107-25 |
| HSM 115 | 5:1, 14:1, 20:1, 25:1 | 2,200 Nm | 55 mm / 2-3/16" | 60 mm / 2-7/16" | HSM115-25 |
| HSM 203 | 5:1, 14:1, 20:1, 25:1 | 3,800 Nm | 65 mm / 2-7/16" | 70 mm / 2-11/16" | HSM203-25 |
| HSM 207 | 5:1, 14:1, 20:1, 25:1 | 6,500 Nm | 75 mm / 2-15/16" | 85 mm / 3-7/16" | HSM207-25 |
| HSM 215 | 5:1, 14:1, 20:1, 25:1 | 11,000 Nm | 90 mm / 3-7/16" | 100 mm / 3-15/16" | HSM215-25 |
| HSM 307 | 14:1, 20:1, 25:1 | 18,000 Nm | 105 mm / 3-15/16" | 115 mm / 4-7/16" | HSM307-25 |
| HSM 315 - 515 | 14:1, 20:1, 25:1 | 28,000 - 42,000 Nm | 125 mm / 4-15/16" | 140 mm / 5-7/16" | HSM315-25 |
Standard Shaft-Mounted Reducer Replacement & Upgrade Guide
Upgrade paths for conventional keyed shaft-mounted reducers to Sumitomo HSM series with Taper-Grip® keyless bushing system:
| Conventional Shaft Mount Reducer | Common Failure Points | Current Sumitomo HSM Replacement | Key Advantages & Reliability Upgrades |
|---|---|---|---|
| Keyed Bore Shaft Mounted Reducer (Size 2/3) | Fretting corrosion locks hub to shaft, keyway wallowing | Sumitomo HSM107 / HSM115 100% Drop-In Upgrade | Taper-Grip® keyless bushing eliminates fretting corrosion for fast removal. |
| Keyed Bore Shaft Mounted Reducer (Size 4/5) | Oil seal failure from shaft runout, backstop slippage | Sumitomo HSM203 / HSM207 100% Drop-In Upgrade | Case-hardened ground helical gears reduce thermal heat generation and vibration. |
| Keyed Bore Shaft Mounted Reducer (Size 6/7) | Housing cracking under heavy belt conveyor startup shocks | Sumitomo HSM215 / HSM307 100% Drop-In Upgrade | Heavy cast-iron housing reinforced for high overhung loads and torque arm stress. |
Expert Technical Sourcing & Shaft Mount System Integration Notes
When replacing conventional shaft-mounted reducers that suffer from seized shafts due to fretting corrosion or gear wear on heavy belt conveyors, bucket elevators, or aggregate crushers, switching to Sumitomo HSM series reducers delivers immediate advantages: complete elimination of shaft keys and fretting locks via Taper-Grip® bushings, easy installation and removal without pullers, integrated backstop runback protection, case-hardened ground helical quiet gearing, and complete mechanical interchangeability. Simply provide us with your existing reducer nameplate frame size or complete model designation (e.g., HSM207-25 or HSM115-20), and our technical engineering team will deliver a 100% compliant replacement specification and proposal.
Core Benchmark Model Standard Configurations
- HSM107-14 (Frame 107 14:1 Ratio)
- HSM107-25 (Frame 107 25:1 Ratio)
- HSM115-20 (Frame 115 20:1 Ratio)
- HSM115-25 (Frame 115 25:1 Ratio)
- HSM203-14 (Frame 203 14:1 Ratio)
- HSM203-25 (Frame 203 25:1 Ratio)
- HSM207-20 (Frame 207 20:1 Ratio)
- HSM207-25 (Frame 207 25:1 Ratio)
- HSM215-25 (Frame 215 25:1 Ratio)
- HSM307-25 (Frame 307 25:1 Ratio)
- Sumitomo HSM Taper-Grip® Bushing Kit
- Sumitomo HSM Internal Backstop Assembly
- Sumitomo HSM Screw Conveyor Adapter
- Sumitomo HSM Torque Arm Assembly
- Sumitomo Shaft Mounted Helical Reducer
- Sumitomo Belt Conveyor Head Drive
- Sumitomo Aggregate Crusher Shaft Mount
- Sumitomo Grain Elevator Shaft Mount
- Sumitomo Keyless Shaft Speed Reducer
- Sumitomo Heavy Duty Helical Gearbox
