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