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Boston Gear721 30SJ

721 30SJ

700 Series Standard Reducer
Item #102819552
  • 2 1/16" Center Distance
  • 30:1 Ratio
  • Shaft Input
  • Right Output
  • Universal Worm Position
  • Mobil SHC634 Synthetic Lubricant
  • Cast Iron
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Boston Gear721 30SJ
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    Shipment Options
  • 2 1/16" Center Distance
  • 30:1 Ratio
  • Shaft Input
  • Right 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
Base to Centerline of Input Shaft 4 11/32 in
Use With 721
Input (Shaft or Bore) Size 5/8 in
Ratio 30:1
Output (Shaft or Bore) Size 1 in
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
HP @ RPM 0.75 hp @ 1800 rpm
Housing Material Cast Iron
Family Name Std Unit
Output Configuration Right Output
Frame Size Shaft Input, Not a C-Face
Reduction Type Single Reduction
Shaft Assembly Code J
Input Configuration Shaft Input
Motor Application General Purpose
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Bolt Center 6 3/8 in x 4 11/16 in
Box Length 6 in
Input HP @ RPM 0.62 hp @ 1150 rpm, 0.99 hp @ 1750 rpm
Worm Position Universal
Output RPM @ 1750 rpm Input 58.33 rpm
Center Distance 2 1/16 in
Thermal Input Horsepower @ 1750 RPM N/A
Frame N/A
Washdown Duty No
Max. Overhung Load @ 1750 rpm 700 lb/in
Output RPM @ Input RPM 58 rpm @ 1750 rpm
Box Height 6 3/8 in
Installed Options Mobil SHC634 Synthetic Lubricant
Max. Thrust Load @ 1150 rpm 700 lb/in
Output Torque @ RPM 795 in lb @ 1150 rpm, 871 in lb @ 1750 rpm
Lubrication Mobil SHC634 Synthetic
Fan Cooled No
Box Width 3 13/16 in
Base to Centerline of Output Shaft 2 9/32 in
Torque Out @ 1150 rpm 795 in lb
Torque Out @ 1750 rpm 871 in lb
Weight 27.7 LB
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