Skip to content Skip to navigation menu
Boston GearRF721-20-B5-H

RF721-20-B5-H

700 Series C-Face Coupled Reducer
Item #101870739
  • 2 1/16" Center Distance
  • 20:1 Ratio
  • 56C Frame
  • C-Face Coupled Input
  • Left & Right Output
  • Universal Worm Position
  • No Lubricant
  • Cast Iron
+ Show More + Show Less
Boston GearRF721-20-B5-H
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
  • 20:1 Ratio
  • 56C Frame
  • C-Face Coupled Input
  • Left & Right 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

  • Must be filled to the proper level with the recommended lubricant for your application before operation
Reduction Type Single Reduction
Use With 721
Washdown Duty No
Input (Shaft or Bore) Size 5/8 in
Center Distance 2 1/16 in
Keyway Size 3/16 x 3/32
Shaft Assembly Code H
Input HP @ RPM 0.86 hp @ 1150 rpm, 1.4 hp @ 1750 rpm
Box Length 6 in
Motor Application General Purpose
Frame Size 56C
Max. Input HP @ 100 rpm 0.11 hp
Output RPM @ 1750 rpm Input 87.5 rpm
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Bore Code B5
Thermal Input Horsepower @ 1750 RPM N/A
Family Name RF
Output RPM @ Input RPM 88 rpm @ 1750 rpm
Lubrication None
Torque Out @ 1150 rpm 782 in lb
Bolt Center 5 in x 2 7/8 in
Base to Centerline of Input Shaft 4 11/32 in
Base to Shaft Center Height w/High Vert. Base Kit 4.88 in
Ratio 20:1
Output Torque @ RPM 782 in lb @ 1150 rpm, 892 in lb @ 1750 rpm
Box Height 6 3/8 in
Output Configuration Left & Right Output
Housing Material Cast Iron
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
Fan Cooled No
Bolt Centers w/ Vertical Base Kits (in) 8 3/8 x 4 7/8
Motor HP 1 hp
Base to Centerline of Output Shaft 2 9/32 in
Max. Thrust Load @ 1150 rpm 700 lb/in
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Worm Position Universal
Bolt Center Length x Bolt Center Width 5 in x 2 7/8 in
Base to Shaft Center Height w/Vert. "J" Base Kit 3.94 in
Box Width 5 3/16 in
Frame 56C
Output (Shaft or Bore) Size 1 in
Input Configuration C-Face Coupled
Bolt Centers w/ Vertical "J" Base Kit (in) 8.63 x 2.63
Max. Overhung Load @ 1750 rpm 700 lb/in
HP @ RPM 1 hp @ 1800 rpm
Bolt Centers w/ Std. Base Kit (in) 6 3/8 x 4 11/16
Torque Out @ 1750 rpm 892 in lb
Weight 36.1 LB
EAN or UPC 781711527054
We're here for you
with Service Centers across the country -
We have your back
Close Compare List Open Compare List Toggle

Product Comparison