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