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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
| Bolt Center | 5 in x 2 7/8 in |
| Series | 700 |
| Bore Code | B5 |
| Torque Out @ 1150 rpm | 782 in lb |
| Output RPM @ 1750 rpm Input | 87.5 rpm |
| Box Height | 6 3/8 in |
| Output Torque Rating Range [Min] | 750 lb-in, 85 Nm |
| Housing Material | Cast Iron |
| Output Speed | 87.5 rpm |
| Input Power Rating | 1.4 hp, 1.044 kW |
| Worm Position | Universal |
| Output Torque Rating Range [Max] | 999 lb-in, 109 Nm |
| Bolt Centers w/ Std. Base Kit (in) | 6 3/8 x 4 11/16 |
| Box Length | 6 in |
| Base to Shaft Center Height w/Vert. "J" Base Kit | 3.94 in |
| Use With | 721 |
| Input Motor HP | 1 |
| Ratio | 20:1 |
| Shaft Assembly Code | H |
| Washdown Duty | No |
| Media Mapping Hollow Bore | P23 |
| HP @ RPM | 1 hp @ 1800 rpm |
| Material | Cast Iron, Standard Paint |
| Bolt Centers w/ Vertical "J" Base Kit (in) | 8.63 x 2.63 |
| Frame | 56C |
| Motor HP | 1 hp |
| Output Configuration | Hollow Output |
| Output Torque | 892 lb-in |
| Max. Thrust Load @ 1150 rpm | 700 lb/in |
| Center Distance Code | 721 |
| Input HP @ RPM | 0.86 hp @ 1150 rpm, 1.4 hp @ 1750 rpm |
| Torque Out @ 1750 rpm | 892 in lb |
| Max. Overhung Load @ RPM | 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm |
| Bolt Center Length x Bolt Center Width | 5 in x 2 7/8 in |
| Base to Shaft Center Height w/Std. Base Kit | 4.81 in |
| Max. Overhung Load @ 1750 rpm | 700 lb/in |
| Output (Shaft or Bore) Size | 1 7/16 in |
| Center Distance | 2.0625 in |
| Rated Efficiency | 88% |
| Style | Right Angle |
| Input (Shaft or Bore) Size | 5/8 in |
| Box Width | 4 45/64 in |
| Base to Centerline of Input Shaft | 4 11/32 in |
| Media Mapping Style | HF |
| Base Mounting Attachment | No Base |
| Bolt Centers w/ Vertical Base Kits (in) | 8 3/8 x 4 7/8 |
| Reduction Type | Single |
| Standard | AGMA Service Class II |
| Fan Cooled | No |
| Motor Application | General Purpose |
| Keyway Size | 3/16 x 3/32 |
| Input Configuration | C-Face Quilled |
| Output Torque @ RPM | 782 in lb @ 1150 rpm, 892 in lb @ 1750 rpm |
| Output RPM @ Input RPM | 88 rpm @ 1750 rpm |
| Lubrication | None |
| Base to Shaft Center Height w/High Vert. Base Kit | 4.88 in |
| Output Shaft Projection | Hollow Output |
| Motor Frame Size | B556C |
| Family Name | HF |
| Frame Size | 56C |
| Thermal Input Horsepower @ 1750 RPM | N/A |
| Media Mapping Output | H |
| Base to Centerline of Output Shaft | 2 9/32 in |
| Base to Shaft Center Height w/Low Vert. Base Kit | 3.13 in |
| Max. Input HP @ 100 rpm | 0.11 hp |
| Max. Thrust Load @ RPM | 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm |
| Output Shaft | Hollow |
| Output Bore Shaft Dia. | 1.438 in |
| Weight | 26.1 LB |
| EAN or UPC | 781711630389 |
