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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.
| Worm Position | Universal |
| Lubrication | None |
| Series | 700 |
| Housing Material | Cast Iron |
| Standard | AGMA Service Class II |
| Washdown Duty | No |
| Torque Out @ 1750 rpm | 892 in lb |
| Output Configuration | Hollow Output |
| Center Distance | 2.0625 in |
| Base to Centerline of Input Shaft | 4 11/32 in |
| Bolt Centers w/ Vertical Base Kits (in) | 8 3/8 x 4 7/8 |
| Rated Efficiency | 88% |
| Media Mapping Hollow Bore | P20 |
| Material | Cast Iron, Standard Paint |
| Reduction Type | Single |
| Shaft Assembly Code | H |
| Ratio | 20:1 |
| Motor HP | 1 hp |
| Style | Right Angle |
| Base Mounting Attachment | No Base |
| Bolt Centers w/ Std. Base Kit (in) | 6 3/8 x 4 11/16 |
| Input (Shaft or Bore) Size | 5/8 in |
| Max. Overhung Load @ RPM | 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm |
| Output Shaft Projection | Hollow Output |
| Base to Shaft Center Height w/Std. Base Kit | 4.81 in |
| Max. Overhung Load @ 1750 rpm | 700 lb/in |
| Input Configuration | C-Face Quilled |
| Box Height | 6 3/8 in |
| Input Motor HP | 1 |
| HP @ RPM | 1 hp @ 1800 rpm |
| Bolt Center | 5 in x 2 7/8 in |
| Keyway Size | 3/16 x 3/32 |
| Media Mapping Style | HF |
| Output Speed | 87.5 rpm |
| Center Distance Code | 721 |
| Box Width | 4 45/64 in |
| Max. Thrust Load @ 1150 rpm | 700 lb/in |
| Torque Out @ 1150 rpm | 782 in lb |
| Fan Cooled | No |
| Output (Shaft or Bore) Size | 1 1/4 in |
| Frame | 56C |
| Motor Application | General Purpose |
| Input HP @ RPM | 0.86 hp @ 1150 rpm, 1.4 hp @ 1750 rpm |
| Bolt Center Length x Bolt Center Width | 5 in x 2 7/8 in |
| Bolt Centers w/ Vertical "J" Base Kit (in) | 8.63 x 2.63 |
| Family Name | HF |
| Max. Thrust Load @ RPM | 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm |
| Use With | 721 |
| Output Torque Rating Range [Min] | 750 lb-in, 85 Nm |
| Motor Frame Size | B556C |
| Output Torque | 892 lb-in |
| Base to Shaft Center Height w/Low Vert. Base Kit | 3.13 in |
| Output Torque Rating Range [Max] | 999 lb-in, 109 Nm |
| Output Shaft | Hollow |
| Thermal Input Horsepower @ 1750 RPM | N/A |
| Base to Shaft Center Height w/High Vert. Base Kit | 4.88 in |
| Base to Shaft Center Height w/Vert. "J" Base Kit | 3.94 in |
| Output RPM @ Input RPM | 88 rpm @ 1750 rpm |
| Box Length | 6 in |
| Frame Size | 56C |
| Bore Code | B5 |
| Base to Centerline of Output Shaft | 2 9/32 in |
| Input Power Rating | 1.4 hp, 1.044 kW |
| Output Bore Shaft Dia. | 1.25 in |
| Output Torque @ RPM | 782 in lb @ 1150 rpm, 892 in lb @ 1750 rpm |
| Output RPM @ 1750 rpm Input | 87.5 rpm |
| Media Mapping Output | H |
| Max. Input HP @ 100 rpm | 0.11 hp |
| Weight | 26.1 LB |
| EAN or UPC | 781711630372 |
