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
Input Configuration C-Face Quilled
Base to Centerline of Input Shaft 4 11/32 in
Reduction Type Single Reduction
Use With 721
Input HP @ RPM 0.86 hp @ 1150 rpm, 1.4 hp @ 1750 rpm
Bolt Centers w/ Vertical Base Kits (in) 8 3/8 x 4 7/8
Output RPM @ 1750 rpm Input 87.5 rpm
Box Width 4 45/64 in
Max. Thrust Load @ 1150 rpm 700 lb/in
Base to Centerline of Output Shaft 2 9/32 in
Output RPM @ Input RPM 88 rpm @ 1750 rpm
Motor HP 1 hp
Box Length 6 in
Torque Out @ 1750 rpm 892 in lb
Shaft Assembly Code H
Thermal Input Horsepower @ 1750 RPM N/A
Bolt Centers w/ Vertical "J" Base Kit (in) 8.63 x 2.63
Torque Out @ 1150 rpm 782 in lb
Output Configuration Hollow Output
Center Distance 2.0625 in
Lubrication None
Keyway Size 3/16 x 3/32
Frame 56C
HP @ RPM 1 hp @ 1800 rpm
Box Height 6 3/8 in
Washdown Duty No
Motor Application General Purpose
Output (Shaft or Bore) Size 1 7/16 in
Output Torque @ RPM 782 in lb @ 1150 rpm, 892 in lb @ 1750 rpm
Base to Shaft Center Height w/Std. Base Kit 4.81 in
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
Base to Shaft Center Height w/Low Vert. Base Kit 3.13 in
Ratio 20:1
Bore Code B5
Fan Cooled No
Input (Shaft or Bore) Size 5/8 in
Base to Shaft Center Height w/Vert. "J" Base Kit 3.94 in
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Housing Material Cast Iron
Max. Overhung Load @ 1750 rpm 700 lb/in
Frame Size 56C
Max. Input HP @ 100 rpm 0.11 hp
Bolt Center Length x Bolt Center Width 5 in x 2 7/8 in
Bolt Center 5 in x 2 7/8 in
Bolt Centers w/ Std. Base Kit (in) 6 3/8 x 4 11/16
Worm Position Universal
Family Name HF
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