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