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