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