Skip to content Skip to navigation menu
Boston GearHF721-30-B5-H-P20

HF721-30-B5-H-P20

700 Series Bostmount C-Face Quilled Reducer
Item #101795948
  • 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 GearHF721-30-B5-H-P20
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

  • 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
  • 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

caution

  • Drives used in a vertical mounting application may require additional pipe plugs and/or grease fittings for proper lubrication and are considered special.
  • High loads, high ambient or operating temperatures, and unusually contaminated atmospheres will require more frequent relubrication.
Motor Application General Purpose
HP @ RPM 1 hp @ 1800 rpm
Max. Input HP @ 100 rpm 0.11 hp
Bore Code B5
Bolt Center Length x Bolt Center Width 5 in x 2 7/8 in
Bolt Centers w/ Vertical "J" Base Kit (in) 8.63 x 2.63
Base to Shaft Center Height w/Low Vert. Base Kit 3.13 in
Input Configuration C-Face Quilled
Reduction Type Single Reduction
Box Length 6 in
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Box Width 4 45/64 in
Shaft Assembly Code H
Keyway Size 3/16 x 3/32
Base to Shaft Center Height w/Vert. "J" Base Kit 3.94 in
Fan Cooled No
Torque Out @ 1150 rpm 782 in lb
Use With 721
Base to Shaft Center Height w/Std. Base Kit 4.81 in
Center Distance 2.0625 in
Base to Centerline of Output Shaft 2 9/32 in
Base to Centerline of Input Shaft 4 11/32 in
Lubrication None
Output Torque @ RPM 782 in lb @ 1150 rpm, 892 in lb @ 1750 rpm
Frame 56C
Max. Overhung Load @ 1750 rpm 700 lb/in
Worm Position Universal
Output (Shaft or Bore) Size 1 1/4 in
Motor HP 0.75 hp
Bolt Center 5 in x 2 7/8 in
Frame Size 56C
Bolt Centers w/ Std. Base Kit (in) 6 3/8 x 4 11/16
Torque Out @ 1750 rpm 892 in lb
Housing Material Cast Iron
Output RPM @ Input RPM 88 rpm @ 1750 rpm
Input (Shaft or Bore) Size 5/8 in
Thermal Input Horsepower @ 1750 RPM N/A
Input HP @ RPM 0.86 hp @ 1150 rpm, 1.4 hp @ 1750 rpm
Max. Overhung 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
Box Height 6 3/8 in
Bolt Centers w/ Vertical Base Kits (in) 8 3/8 x 4 7/8
Family Name HF
Max. Thrust Load @ 1150 rpm 700 lb/in
Ratio 20:1
Washdown Duty No
Output Configuration Hollow Output
Output RPM @ 1750 rpm Input 87.5 rpm
Weight 26.1 LB
EAN or UPC 781711630433
We're here for you
with Service Centers across the country -
We have your back
Close Compare List Open Compare List Toggle

Product Comparison