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