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Boston GearRF721-5-B5-J

RF721-5-B5-J

700 Series C-Face Coupled Reducer
Item #102817696
  • 2 1/16" Center Distance
  • 5:1 Ratio
  • 56C Frame
  • C-Face Coupled Input
  • Right Output
  • Universal Worm Position
  • No Lubricant
  • Cast Iron
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Boston GearRF721-5-B5-J
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    Shipment Options
  • 2 1/16" Center Distance
  • 5:1 Ratio
  • 56C Frame
  • C-Face Coupled Input
  • Right Output

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
Washdown Duty No
Fan Cooled No
Motor Application General Purpose
Base to Centerline of Input Shaft 4 11/32 in
Max. Thrust Load @ 1150 rpm 700 lb/in
Base to Centerline of Output Shaft 2 9/32 in
Torque Out @ 1750 rpm 620 in lb
Shaft Assembly Code J
Bolt Center 5 in x 2 7/8 in
Torque Out @ 1150 rpm 575 in lb
Input HP @ RPM 2.33 hp @ 1150 rpm, 3.66 hp @ 1750 rpm
Use With 721
Output RPM @ 1750 rpm Input 350 rpm
Frame Size 56C
Box Height 6 3/8 in
Reduction Type Single Reduction
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
HP @ RPM 3 hp @ 1800 rpm
Output Configuration Right Output
Worm Position Universal
Bore Code B5
Family Name RF
Frame 56C
Max. Overhung Load @ 1750 rpm 700 lb/in
Center Distance 2.0625 in
Housing Material Cast Iron
Bolt Center Length x Bolt Center Width 5 in x 2 7/8 in
Lubrication None
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Thermal Input Horsepower @ 1750 RPM N/A
Output RPM @ Input RPM 350 rpm @ 1750 rpm
Input (Shaft or Bore) Size 5/8 in
Box Width 5 3/16 in
Box Length 6 in
Output Torque @ RPM 575 in lb @ 1150 rpm, 620 in lb @ 1750 rpm
Ratio 5:1
Output (Shaft or Bore) Size 1 in
Input Configuration C-Face Coupled
Weight 36.1 LB
EAN or UPC 781711245248
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