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