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Boston Gear
HF721-20-B5-H-P23
700 Series 20:1 Ratio Hollow Assembly Single Reduction Worm Gear Reducer Without Base
Item #101793754
- 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
- Must be filled to the proper level with the recommended lubricant for your application before operation
| Motor Frame Size | B556C |
| Material | Cast Iron, Standard Paint |
| Base to Shaft Center Height w/High Vert. Base Kit | 4.88 in |
| Max. Thrust Load @ RPM | 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm |
| Output Configuration | Hollow Output |
| Series | 700 |
| Input Power Rating | 1.4 hp, 1.044 kW |
| Frame | 56C |
| Media Mapping Output | H |
| Output Shaft | Hollow |
| Input Motor HP | 1 |
| Input HP @ RPM | 0.86 hp @ 1150 rpm, 1.4 hp @ 1750 rpm |
| Max. Overhung Load @ 1750 rpm | 700 lb/in |
| Media Mapping Style | HF |
| Max. Thrust Load @ 1150 rpm | 700 lb/in |
| Rated Efficiency | 88% |
| Lubrication | None |
| Input Configuration | C-Face Quilled |
| Base to Centerline of Output Shaft | 2 9/32 in |
| Bolt Centers w/ Vertical "J" Base Kit (in) | 8.63 x 2.63 |
| Max. Overhung Load @ RPM | 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm |
| Output Torque Rating Range [Min] | 750 lb-in, 85 Nm |
| Input (Shaft or Bore) Size | 5/8 in |
| Output Torque Rating Range [Max] | 999 lb-in, 109 Nm |
| Shaft Assembly Code | H |
| Bolt Center Length x Bolt Center Width | 5 in x 2 7/8 in |
| Family Name | HF |
| Use With | 721 |
| Motor HP | 1 hp |
| Output Speed | 87.5 rpm |
| Housing Material | Cast Iron |
| Base to Shaft Center Height w/Vert. "J" Base Kit | 3.94 in |
| Worm Position | Universal |
| Fan Cooled | No |
| Base to Shaft Center Height w/Low Vert. Base Kit | 3.13 in |
| Bolt Centers w/ Std. Base Kit (in) | 6 3/8 x 4 11/16 |
| Ratio | 20:1 |
| Washdown Duty | No |
| Box Width | 4 45/64 in |
| HP @ RPM | 1 hp @ 1800 rpm |
| Standard | AGMA Service Class II |
| Thermal Input Horsepower @ 1750 RPM | N/A |
| Base Mounting Attachment | No Base |
| Output Torque @ RPM | 782 in lb @ 1150 rpm, 892 in lb @ 1750 rpm |
| Base to Centerline of Input Shaft | 4 11/32 in |
| Max. Input HP @ 100 rpm | 0.11 hp |
| Style | Right Angle |
| Base to Shaft Center Height w/Std. Base Kit | 4.81 in |
| Reduction Type | Single |
| Box Height | 6 3/8 in |
| Frame Size | 56C |
| Media Mapping Hollow Bore | P23 |
| Output (Shaft or Bore) Size | 1 7/16 in |
| Center Distance | 2.0625 in |
| Bolt Centers w/ Vertical Base Kits (in) | 8 3/8 x 4 7/8 |
| Output Torque | 892 lb-in |
| Keyway Size | 3/16 x 3/32 |
| Output Shaft Projection | Hollow Output |
| Torque Out @ 1150 rpm | 782 in lb |
| Output RPM @ 1750 rpm Input | 87.5 rpm |
| Bolt Center | 5 in x 2 7/8 in |
| Bore Code | B5 |
| Output RPM @ Input RPM | 88 rpm @ 1750 rpm |
| Motor Application | General Purpose |
| Torque Out @ 1750 rpm | 892 in lb |
| Output Bore Shaft Dia. | 1.438 in |
| Box Length | 6 in |
| Center Distance Code | 721 |
| Weight | 26.1 LB |
| EAN or UPC | 781711630389 |
