Find a Service Center
Boston Gear
RF718-20-B5-J
700 Series 20:1 Ratio J Assembly Single Reduction Worm Gear Reducer Without Base
Item #101835845
- 1 Input Motor hp
- 700 Series
- 1.75 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
- Mounting of speed reducers in overhead positions may be hazardous
- Use of external guides or supports is strongly recommended for overhead mounting.
| Reduction Type | Single |
| Fan Cooled | No |
| Box Width | 5 1/32 in |
| Keyway Size | 3/16 x 3/32 |
| Output Torque | 590 lb-in |
| Output Speed | 87.5 rpm |
| Motor Application | General Purpose |
| Output Torque Rating Range [Max] | 749 lb-in, 84 Nm |
| Input Motor HP | 1 |
| Max. Input HP @ 100 rpm | 0.08 hp |
| Bolt Centers w/ Vertical Base Kits (in) | 7.38 x 4.00 |
| Bolt Center | 4 3/16 in x 2 3/4 in |
| Use With | 718 |
| Input (Shaft or Bore) Size | 5/8 in |
| Output Shaft | Solid |
| Max. Overhung Load @ 1750 rpm | 500 lb/in |
| Max. Thrust Load @ RPM | 500 lb/in @ 1150 rpm, 500 lb/in @ 1750 rpm |
| Output Torque Rating Range [Min] | 500 lb-in, 60 Nm |
| Motor HP | 3/4 hp |
| Housing Material | Cast Iron |
| Material | Cast Iron, Standard Paint |
| Base to Shaft Center Height w/Vert. "J" Base Kit | 3.5 in |
| Washdown Duty | No |
| Output RPM @ Input RPM | 88 rpm @ 1750 rpm |
| Media Mapping Style | RF |
| Lubrication | None |
| Center Distance Code | 718 |
| Torque Out @ 1750 rpm | 590 in lb |
| Worm Position | Universal |
| Thermal Input Horsepower @ 1750 RPM | N/A |
| Output RPM @ 1750 rpm Input | 87.5 rpm |
| Ratio | 20:1 |
| Style | Right Angle |
| Output Bore Shaft Dia. | 0.875 in |
| Max. Thrust Load @ 1150 rpm | 500 lb/in |
| Base Mounting Attachment | No Base |
| Standard | AGMA Service Class I |
| Base to Centerline of Input Shaft | 3 13/16 in |
| Input HP @ RPM | 0.58 hp @ 1150 rpm, 0.97 hp @ 1750 rpm |
| Bolt Centers w/ Std. Base Kit (in) | 5 3/4 x 4 1/2 |
| Center Distance | 1.75 in |
| Family Name | RF |
| Base to Shaft Center Height w/Low Vert. Base Kit | 3 in |
| Max. Overhung Load @ RPM | 500 lb/in @ 1150 rpm, 500 lb/in @ 1750 rpm |
| HP @ RPM | 0.75 hp @ 1800 rpm |
| Box Height | 5 3/4 in |
| Media Mapping Output | J |
| Output (Shaft or Bore) Size | 7/8 in |
| Base to Centerline of Output Shaft | 2 1/16 in |
| Motor Frame Size | B556C |
| Input Configuration | C-Face Coupled |
| Series | 700 |
| Box Length | 5 1/2 in |
| Base to Shaft Center Height w/Std. Base Kit | 4.38 in |
| Output Configuration | Right Output |
| Base to Shaft Center Height w/High Vert. Base Kit | 4.38 in |
| Output Torque @ RPM | 525 in lb @ 1150 rpm, 590 in lb @ 1750 rpm |
| Bolt Center Length x Bolt Center Width | 4 3/16 in x 2 3/4 in |
| Frame Size | 56C |
| Shaft Assembly Code | J |
| Input Power Rating | 0.97 hp, 0.723 kW |
| Bolt Centers w/ Vertical "J" Base Kit (in) | 7.63 x 2.50 |
| Torque Out @ 1150 rpm | 525 in lb |
| Bore Code | B5 |
| Frame | 56C |
| Rated Efficiency | 84% |
| Weight | 27.1 LB |
| EAN or UPC | 781711526798 |
