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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
Box Length 6 in
Motor HP 1/2 hp
Torque Out @ 1150 rpm 750 in lb
Thermal Input Horsepower @ 1750 RPM N/A
Output Torque @ RPM 750 in lb @ 1150 rpm, 857 in lb @ 1750 rpm
Keyway Size 3/16 x 3/32
Bolt Centers w/ Vertical Base Kits (in) 8 3/8 x 4 7/8
Bolt Centers w/ Std. Base Kit (in) 6 3/8 x 4 11/16
Center Distance 2 1/16 in
Frame Size 56C
Output RPM @ Input RPM 35 rpm @ 1750 rpm
Ratio 50:1
Use With 721
Family Name RF
Motor Application General Purpose
Shaft Assembly Code G
Bore Code B5
Torque Out @ 1750 rpm 857 in lb
Box Width 5 3/16 in
Output RPM @ 1750 rpm Input 35 rpm
Base to Shaft Center Height w/Std. Base Kit 4.81 in
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Output (Shaft or Bore) Size 1 in
Input Configuration C-Face Coupled
Input HP @ RPM 0.38 hp @ 1150 rpm, 0.66 hp @ 1750 rpm
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Input (Shaft or Bore) Size 5/8 in
Base to Shaft Center Height w/Vert. "J" Base Kit 3.94 in
Reduction Type Single Reduction
Bolt Centers w/ Vertical "J" Base Kit (in) 8.63 x 2.63
Housing Material Cast Iron
Output Configuration Left Output
Worm Position Universal
Max. Thrust Load @ 1150 rpm 700 lb/in
Lubrication None
Base to Shaft Center Height w/Low Vert. Base Kit 3.13 in
Max. Overhung Load @ 1750 rpm 700 lb/in
Frame 56C
Box Height 6 3/8 in
Base to Centerline of Output Shaft 2.28125 in
Washdown Duty No
HP @ RPM 0.3333333 hp @ 1200 rpm, 0.5 hp @ 1800 rpm
Base to Centerline of Input Shaft 4.34375 in
Max. Input HP @ 100 rpm 0.057 hp
Fan Cooled No
Base to Shaft Center Height w/High Vert. Base Kit 4.88 in
Bolt Center 5 in x 2 7/8 in
Weight 36.1 LB
EAN or UPC 781711527160
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