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Boston GearS721W50H

S721W50H

700 Series Hollow Output Reducer
Item #102818275
  • 2 1/16" Center Distance
  • 50:1 Ratio
  • Shaft Input
  • Hollow Output
  • Universal Worm Position
  • No Lubricant
  • Cast Iron
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Boston GearS721W50H
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    Shipment Options
  • 2 1/16" Center Distance
  • 50:1 Ratio
  • Shaft Input
  • Hollow Output
  • Universal Worm Position

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

  • Must be filled to the proper level with the recommended lubricant for your application before operation
Torque Out @ 1150 rpm 750 in lb
Input Configuration Shaft Input
Base to Centerline of Input Shaft 3 3/4 in
Ratio 50:1
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Center Distance 2 1/16 in
Fan Cooled No
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Reduction Type Single Reduction
Output RPM @ Input RPM 35 rpm @ 1750 rpm
Washdown Duty No
Worm Position Universal
Bolt Center Length x Bolt Center Width 5 in x 2 7/8 in
Lubrication None
Max. Overhung Load @ 1750 rpm 700 lb/in
Output Torque @ RPM 750 in lb @ 1150 rpm, 857 in lb @ 1750 rpm
Max. Thrust Load @ 1150 rpm 700 lb/in
Bolt Center 5 in x 2 7/8 in
Base to Centerline of Output Shaft N/A
Shaft Assembly Code H
Output RPM @ 1750 rpm Input 35 rpm
HP @ RPM 0.3333333 hp @ 1200 rpm, 0.5 hp @ 1800 rpm
Installed Options Flanged Base
Output (Shaft or Bore) Size 1 1/8 in
Output Configuration Hollow Output
Box Width 4 1/8 in
Housing Material Cast Iron
Input HP @ RPM 0.38 hp @ 1150 rpm, 0.66 hp @ 1750 rpm
Frame N/A
Motor Application General Purpose
Box Length 6 in
Torque Out @ 1750 rpm 857 in lb
Box Height 6 3/8 in
Use With 721
Thermal Input Horsepower @ 1750 RPM N/A
Input (Shaft or Bore) Size 5/8 in
Family Name S
Frame Size Shaft Input, Not a C-Face
Weight 28.0 LB
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