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