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