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Boston GearHF721-20-B5-H-P12

HF721-20-B5-H-P12

700 Series Bostmount C-Face Quilled Reducer
Item #101795354
  • 2 1/16" Center Distance
  • 20:1 Ratio
  • 56C Frame
  • C-Face Quilled Input
  • Hollow Output
  • Universal Worm Position
  • No Lubricant
  • Cast Iron
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Boston GearHF721-20-B5-H-P12
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    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

  • Sudden, slam-type stalling should be avoided. Applications of this kind, which are beyond the expected normal performance of pneumatic power motors, will damage the power train due to the dynamic shock loads imposed.
Ratio 20:1
Bore Code B5
Torque Out @ 1750 rpm 892 in lb
Box Height 6 3/8 in
HP @ RPM 1 hp @ 1800 rpm
Torque Out @ 1150 rpm 782 in lb
Output RPM @ Input RPM 88 rpm @ 1750 rpm
Box Length 6 in
Output (Shaft or Bore) Size 3/4 in
Reduction Type Single Reduction
Keyway Size 3/16 x 3/32
Center Distance 2.0625 in
Family Name HF
Input Configuration C-Face Quilled
Base to Centerline of Input Shaft 4 11/32 in
Base to Shaft Center Height w/Std. Base Kit 4.81 in
Max. Overhung Load @ 1750 rpm 700 lb/in
Frame Size 56C
Thermal Input Horsepower @ 1750 RPM N/A
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Base to Centerline of Output Shaft 2 9/32 in
Base to Shaft Center Height w/High Vert. Base Kit 4.88 in
Bolt Center 5 in x 2 7/8 in
Output RPM @ 1750 rpm Input 87.5 rpm
Base to Shaft Center Height w/Vert. "J" Base Kit 3.94 in
Box Width 4 45/64 in
Input (Shaft or Bore) Size 5/8 in
Output Torque @ RPM 782 in lb @ 1150 rpm, 892 in lb @ 1750 rpm
Fan Cooled No
Motor HP 1 hp
Output Configuration Hollow Output
Washdown Duty No
Bolt Center Length x Bolt Center Width 5 in x 2 7/8 in
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Housing Material Cast Iron
Shaft Assembly Code H
Bolt Centers w/ Vertical "J" Base Kit (in) 8.63 x 2.63
Frame 56C
Max. Input HP @ 100 rpm 0.11 hp
Input HP @ RPM 0.86 hp @ 1150 rpm, 1.4 hp @ 1750 rpm
Base to Shaft Center Height w/Low Vert. Base Kit 3.13 in
Motor Application General Purpose
Bolt Centers w/ Vertical Base Kits (in) 8 3/8 x 4 7/8
Max. Thrust Load @ 1150 rpm 700 lb/in
Lubrication None
Bolt Centers w/ Std. Base Kit (in) 6 3/8 x 4 11/16
Use With 721
Worm Position Universal
Weight 26.1 LB
EAN or UPC 781711630334
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