Skip to content Skip to navigation menu
Boston GearHF721-20-B5-H-P23

HF721-20-B5-H-P23

700 Series Bostmount C-Face Quilled Reducer
Item #101793754
  • 2 1/16" Center Distance
  • 20:1 Ratio
  • 56C Frame
  • C-Face Quilled Input
  • Hollow Output
  • Universal Worm Position
  • No Lubricant
  • Cast Iron
+ Show More + Show Less
Boston GearHF721-20-B5-H-P23
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 Quilled Input
  • Hollow 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
Bolt Center Length x Bolt Center Width 5 in x 2 7/8 in
Base to Shaft Center Height w/Std. Base Kit 4.81 in
Max. Overhung Load @ 1750 rpm 700 lb/in
Use With 721
Frame 56C
Box Length 6 in
Base to Shaft Center Height w/Low Vert. Base Kit 3.13 in
Output Configuration Hollow Output
Box Width 4 45/64 in
Lubrication None
Output (Shaft or Bore) Size 1 7/16 in
Shaft Assembly Code H
Worm Position Universal
Output RPM @ Input RPM 88 rpm @ 1750 rpm
Washdown Duty No
Base to Shaft Center Height w/High Vert. Base Kit 4.88 in
Keyway Size 3/16 x 3/32
Base to Shaft Center Height w/Vert. "J" Base Kit 3.94 in
Housing Material Cast Iron
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Family Name HF
Bolt Center 5 in x 2 7/8 in
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Bore Code B5
Torque Out @ 1750 rpm 892 in lb
Bolt Centers w/ Std. Base Kit (in) 6 3/8 x 4 11/16
Fan Cooled No
Input (Shaft or Bore) Size 5/8 in
Input Configuration C-Face Quilled
Reduction Type Single Reduction
Torque Out @ 1150 rpm 782 in lb
Max. Input HP @ 100 rpm 0.11 hp
Motor HP 1 hp
Frame Size 56C
Thermal Input Horsepower @ 1750 RPM N/A
Box Height 6 3/8 in
Base to Centerline of Output Shaft 2 9/32 in
Ratio 20:1
Output Torque @ RPM 782 in lb @ 1150 rpm, 892 in lb @ 1750 rpm
Output RPM @ 1750 rpm Input 87.5 rpm
Base to Centerline of Input Shaft 4 11/32 in
Center Distance 2.0625 in
Bolt Centers w/ Vertical "J" Base Kit (in) 8.63 x 2.63
Bolt Centers w/ Vertical Base Kits (in) 8 3/8 x 4 7/8
Motor Application General Purpose
Max. Thrust Load @ 1150 rpm 700 lb/in
Input HP @ RPM 0.86 hp @ 1150 rpm, 1.4 hp @ 1750 rpm
HP @ RPM 1 hp @ 1800 rpm
Weight 26.1 LB
EAN or UPC 781711630389
We're here for you
with Service Centers across the country -
We have your back
Close Compare List Open Compare List Toggle

Product Comparison