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Boston GearRF721-50-B5-G

RF721-50-B5-G

700 Series C-Face Coupled Reducer
Item #101871834
  • 2 1/16" Center Distance
  • 50:1 Ratio
  • 56C Frame
  • C-Face Coupled Input
  • Left Output
  • Universal Worm Position
  • No Lubricant
  • Cast Iron
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Boston GearRF721-50-B5-G
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    Shipment Options
  • 2 1/16" Center Distance
  • 50:1 Ratio
  • 56C Frame
  • C-Face Coupled Input
  • Left 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

  • Cannot be used in air systems where compressors are lubricated with fire-resistant fluids, such as phosphate ester and di-ester types
  • Polycarbonate bowls, being transparent and tough, are ideal for use with filters and lubricators. They are suitable for use in normal industrial environments, but should not be located in areas where they could be subjected to direct sunlight, an impact
Fan Cooled No
Input Configuration C-Face Coupled
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Bolt Centers w/ Vertical "J" Base Kit (in) 8.63 x 2.63
Base to Centerline of Input Shaft 4.34375 in
Frame 56C
Base to Shaft Center Height w/Vert. "J" Base Kit 3.94 in
Bolt Centers w/ Std. Base Kit (in) 6 3/8 x 4 11/16
Bolt Centers w/ Vertical Base Kits (in) 8 3/8 x 4 7/8
Max. Thrust Load @ 1150 rpm 700 lb/in
Use With 721
HP @ RPM 0.3333333 hp @ 1200 rpm, 0.5 hp @ 1800 rpm
Frame Size 56C
Motor Application General Purpose
Base to Shaft Center Height w/Low Vert. Base Kit 3.13 in
Output Torque @ RPM 750 in lb @ 1150 rpm, 857 in lb @ 1750 rpm
Base to Shaft Center Height w/Std. Base Kit 4.81 in
Input (Shaft or Bore) Size 5/8 in
Housing Material Cast Iron
Max. Overhung Load @ 1750 rpm 700 lb/in
Motor HP 1/2 hp
Family Name RF
Max. Input HP @ 100 rpm 0.057 hp
Bore Code B5
Base to Shaft Center Height w/High Vert. Base Kit 4.88 in
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Lubrication None
Output Configuration Left Output
Reduction Type Single Reduction
Box Height 6 3/8 in
Worm Position Universal
Keyway Size 3/16 x 3/32
Output (Shaft or Bore) Size 1 in
Base to Centerline of Output Shaft 2.28125 in
Torque Out @ 1750 rpm 857 in lb
Box Length 6 in
Shaft Assembly Code G
Output RPM @ 1750 rpm Input 35 rpm
Torque Out @ 1150 rpm 750 in lb
Bolt Center 5 in x 2 7/8 in
Center Distance 2 1/16 in
Output RPM @ Input RPM 35 rpm @ 1750 rpm
Box Width 5 3/16 in
Washdown Duty No
Input HP @ RPM 0.38 hp @ 1150 rpm, 0.66 hp @ 1750 rpm
Ratio 50:1
Thermal Input Horsepower @ 1750 RPM N/A
Weight 36.1 LB
EAN or UPC 781711527160
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