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