Skip to content Skip to navigation menu
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
+ Show More + Show Less
Boston GearRF721-50-B5-G
Price Unavailable
Price Unavailable
Pricing is unavailable at this time. Please contact Customer Service for assistance.
Online Ordering Restricted
Please contact Customer Service for assistance.
Contact Customer Service
    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
Washdown Duty No
Base to Shaft Center Height w/High Vert. Base Kit 4.88 in
Bolt Center 5 in x 2 7/8 in
Output RPM @ Input RPM 35 rpm @ 1750 rpm
HP @ RPM 0.3333333 hp @ 1200 rpm, 0.5 hp @ 1800 rpm
Lubrication None
Reduction Type Single Reduction
Worm Position Universal
Torque Out @ 1150 rpm 750 in lb
Housing Material Cast Iron
Output (Shaft or Bore) Size 1 in
Center Distance 2 1/16 in
Box Length 6 in
Max. Thrust Load @ 1150 rpm 700 lb/in
Input (Shaft or Bore) Size 5/8 in
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Use With 721
Keyway Size 3/16 x 3/32
Output Torque @ RPM 750 in lb @ 1150 rpm, 857 in lb @ 1750 rpm
Box Width 5 3/16 in
Base to Shaft Center Height w/Vert. "J" Base Kit 3.94 in
Output Configuration Left Output
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Box Height 6 3/8 in
Bolt Centers w/ Vertical "J" Base Kit (in) 8.63 x 2.63
Output RPM @ 1750 rpm Input 35 rpm
Frame 56C
Bore Code B5
Torque Out @ 1750 rpm 857 in lb
Max. Overhung Load @ 1750 rpm 700 lb/in
Frame Size 56C
Ratio 50:1
Input HP @ RPM 0.38 hp @ 1150 rpm, 0.66 hp @ 1750 rpm
Fan Cooled No
Base to Shaft Center Height w/Std. Base Kit 4.81 in
Base to Shaft Center Height w/Low Vert. Base Kit 3.13 in
Base to Centerline of Output Shaft 2.28125 in
Thermal Input Horsepower @ 1750 RPM N/A
Bolt Centers w/ Vertical Base Kits (in) 8 3/8 x 4 7/8
Max. Input HP @ 100 rpm 0.057 hp
Motor HP 1/2 hp
Base to Centerline of Input Shaft 4.34375 in
Bolt Centers w/ Std. Base Kit (in) 6 3/8 x 4 11/16
Motor Application General Purpose
Input Configuration C-Face Coupled
Family Name RF
Shaft Assembly Code G
Weight 36.1 LB
EAN or UPC 781711527160
We're here for you
with Service Centers across the country -
We have your back
Close Compare List Open Compare List Toggle

Product Comparison