Find a Service Center
Boston Gear
HF7721-20-B5-H-P20
700 Series 20:1 Ratio Hollow Assembly Single Reduction Worm Gear Reducer Without Base
Item #101794611
- 1 Input Motor hp
- 700 Series
- 2.06 in Center Distance
- Single Reduction
description
- Our standard 700 Series - the heart of Boston Gear's speed reducer product line - has been serving many industries reliably for over 40 years. Its proven modular design has set the industry standard for performance and is the most imitated product in today's worm gear speed reducer market.
features
- Large oil reservoir provides efficient heat dissipation and lubrication for longer life
- Housing is straddle milled top and bottom for precise alignment
- Internal baffles ensure positive, leak-free venting
- Rugged housing fabricated of fine-grained cast iron for maximum strength and greater precision during worm and gear alignment
- Bronze worm gear is straddle mounted between heavy-duty tapered roller bearings to increase thrust and load capacities on size 713 to 760
- High strength steel output shaft ensures capacity for high torque
- Pipe plugs allow easy fill, level and drain in any mounting position
- Super finished oil seal diameters on both input and output shafts extend seal life
caution
- High loads, high ambient or operating temperatures, and unusually contaminated atmospheres will require more frequent relubrication.
| Ratio | 20:1 |
| Output Torque Rating Range [Max] | 999 lb-in, 109 Nm |
| Frame | 56C |
| Shaft Assembly Code | H |
| Base to Centerline of Input Shaft | 4 11/32 in |
| Input Configuration | C-Face Quilled |
| Material | Cast Iron, Standard Paint |
| Max. Thrust Load @ 1150 rpm | 700 lb/in |
| Base to Shaft Center Height w/Std. Base Kit | 4.81 in |
| Motor Frame Size | B556C |
| Motor HP | 1 hp |
| Output (Shaft or Bore) Size | 1 1/4 in |
| Output Torque Rating Range [Min] | 750 lb-in, 85 Nm |
| Reduction Type | Single |
| Use With | 721 |
| Base to Shaft Center Height w/Vert. "J" Base Kit | 3.94 in |
| Center Distance | 2.0625 in |
| Output Speed | 87.5 rpm |
| Bolt Centers w/ Vertical Base Kits (in) | 8 3/8 x 4 7/8 |
| Box Length | 6 in |
| Output RPM @ 1750 rpm Input | 87.5 rpm |
| Base to Shaft Center Height w/High Vert. Base Kit | 4.88 in |
| Torque Out @ 1150 rpm | 782 in lb |
| Input Power Rating | 1.4 hp, 1.044 kW |
| Input (Shaft or Bore) Size | 5/8 in |
| Base to Shaft Center Height w/Low Vert. Base Kit | 3.13 in |
| Fan Cooled | No |
| Lubrication | None |
| Rated Efficiency | 88% |
| Thermal Input Horsepower @ 1750 RPM | N/A |
| Media Mapping Hollow Bore | P20 |
| Frame Size | 56C |
| Motor Application | General Purpose |
| Housing Material | Cast Iron |
| Input HP @ RPM | 0.86 hp @ 1150 rpm, 1.4 hp @ 1750 rpm |
| Max. Input HP @ 100 rpm | 0.11 hp |
| Max. Thrust Load @ RPM | 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm |
| Base Mounting Attachment | No Base |
| Washdown Duty | No |
| Output RPM @ Input RPM | 88 rpm @ 1750 rpm |
| Worm Position | Universal |
| Standard | AGMA Service Class II |
| Output Shaft Projection | Hollow Output |
| Bore Code | B5 |
| Family Name | HF |
| Style | Right Angle |
| Keyway Size | 3/16 x 3/32 |
| Bolt Center | 5 in x 2 7/8 in |
| Output Configuration | Hollow Output |
| HP @ RPM | 1 hp @ 1800 rpm |
| Bolt Centers w/ Vertical "J" Base Kit (in) | 8.63 x 2.63 |
| Bolt Center Length x Bolt Center Width | 5 in x 2 7/8 in |
| Output Bore Shaft Dia. | 1.25 in |
| Output Torque @ RPM | 782 in lb @ 1150 rpm, 892 in lb @ 1750 rpm |
| Media Mapping Style | HF |
| Box Width | 4 45/64 in |
| Box Height | 6 3/8 in |
| Input Motor HP | 1 |
| Torque Out @ 1750 rpm | 892 in lb |
| Output Torque | 892 lb-in |
| Media Mapping Output | H |
| Output Shaft | Hollow |
| Max. Overhung Load @ RPM | 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm |
| Base to Centerline of Output Shaft | 2 9/32 in |
| Center Distance Code | 721 |
| Max. Overhung Load @ 1750 rpm | 700 lb/in |
| Series | 700 |
| Bolt Centers w/ Std. Base Kit (in) | 6 3/8 x 4 11/16 |
| Weight | 26.1 LB |
| EAN or UPC | 781711630372 |
