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