Skip to content Skip to navigation menu
Boston GearRF721-50-B5-J

RF721-50-B5-J

700 Series C-Face Coupled Reducer
Item #101855258
  • 2 1/16" Center Distance
  • 50:1 Ratio
  • 56C Frame
  • C-Face Coupled Input
  • Right Output
  • Universal Worm Position
  • No Lubricant
  • Cast Iron
+ Show More + Show Less
Boston GearRF721-50-B5-J
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
  • Right Output

features

  • Super finished oil seal diameters on both input and output shafts extend seal life
  • Pipe plugs allow easy fill, level and drain in any mounting position
  • 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
  • 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

caution

  • Must be filled to the proper level with the recommended lubricant for your application before operation
Reduction Type Single Reduction
Worm Position Universal
Bore Code B5
Frame 56C
Thermal Input Horsepower @ 1750 RPM N/A
Base to Centerline of Output Shaft 2 9/32 in
Base to Shaft Center Height w/Std. Base Kit 4.81 in
Motor HP 1/2 hp
Max. Overhung Load @ 1750 rpm 700 lb/in
Family Name RF
Input (Shaft or Bore) Size 5/8 in
Input HP @ RPM 0.38 hp @ 1150 rpm, 0.66 hp @ 1750 rpm
Keyway Size 3/16 x 3/32
Frame Size 56C
Base to Shaft Center Height w/Low Vert. Base Kit 3.13 in
Input Configuration C-Face Coupled
HP @ RPM 0.3333333 hp @ 1200 rpm, 0.5 hp @ 1800 rpm
Bolt Center 5 in x 2 7/8 in
Output Torque @ RPM 750 in lb @ 1150 rpm, 857 in lb @ 1750 rpm
Torque Out @ 1150 rpm 750 in lb
Output RPM @ 1750 rpm Input 35 rpm
Output Configuration Right Output
Center Distance 2 1/16 in
Max. Thrust Load @ 1150 rpm 700 lb/in
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Base to Centerline of Input Shaft 4 11/32 in
Box Length 6 in
Ratio 50:1
Bolt Center Length x Bolt Center Width 5 in x 2 7/8 in
Box Width 5 3/16 in
Bolt Centers w/ Std. Base Kit (in) 6 3/8 x 4 11/16
Housing Material Cast Iron
Use With 721
Bolt Centers w/ Vertical "J" Base Kit (in) 8.63 x 2.63
Shaft Assembly Code J
Motor Application General Purpose
Base to Shaft Center Height w/Vert. "J" Base Kit 3.94 in
Output RPM @ Input RPM 35 rpm @ 1750 rpm
Box Height 6 3/8 in
Torque Out @ 1750 rpm 857 in lb
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Fan Cooled No
Output (Shaft or Bore) Size 1 in
Washdown Duty No
Lubrication None
Max. Input HP @ 100 rpm 0.057 hp
Base to Shaft Center Height w/High Vert. Base Kit 4.88 in
Bolt Centers w/ Vertical Base Kits (in) 8 3/8 x 4 7/8
Weight 36.1 LB
EAN or UPC 781711527184
We're here for you
with Service Centers across the country -
We have your back
Close Compare List Open Compare List Toggle

Product Comparison