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