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Boston GearSRF721-50-B5-G

SRF721-50-B5-G

700 Series C-Face Coupled, Hollow Output Reducer
Item #102858292
  • 2 1/16" Center Distance
  • 50:1 Ratio
  • 56C Frame
  • C-Face Coupled Input
  • Hollow Output
  • Universal Worm Position
  • No Lubricant
  • Cast Iron
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Boston GearSRF721-50-B5-G
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    Shipment Options
  • 2 1/16" Center Distance
  • 50:1 Ratio
  • 56C Frame
  • C-Face Coupled Input
  • Hollow Output

features

  • Rugged housing fabricated of fine-grained cast iron for maximum strength and greater precision during worm and gear alignment
  • Internal baffles ensure positive, leak-free venting
  • Super finished oil seal diameters on both input and output shafts extend seal life
  • 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
  • Large oil reservoir provides efficient heat dissipation and lubrication for longer life
  • Housing is straddle milled top and bottom for precise alignment

caution

  • Must be filled to the proper level with the recommended lubricant for your application before operation
Ratio 50:1
Base to Shaft Center Height w/Vert. "J" Base Kit 3.94 in
Fan Cooled No
Reduction Type Single Reduction
Torque Out @ 1750 rpm 857 in lb
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Max. Thrust Load @ 1150 rpm 700 lb/in
Bolt Center 5 in x 2 7/8 in
Output (Shaft or Bore) Size 1 1/8 in
Box Width 4 1/8 in
Torque Out @ 1150 rpm 750 in lb
Motor HP 1/2 hp
HP @ RPM 0.3333333 hp @ 1200 rpm, 0.5 hp @ 1800 rpm
Frame 56C
Lubrication None
Base to Shaft Center Height w/High Vert. Base Kit 4.88 in
Keyway Size 3/16 x 3/32
Motor Application General Purpose
Bolt Center Length x Bolt Center Width 5 in x 2 7/8 in
Thermal Input Horsepower @ 1750 RPM N/A
Output Configuration Hollow Output
Box Height 6 3/8 in
Bolt Centers w/ Std. Base Kit (in) 6 3/8 x 4 11/16
Input HP @ RPM 0.38 hp @ 1150 rpm, 0.66 hp @ 1750 rpm
Base to Shaft Center Height w/Std. Base Kit 4.81 in
Output RPM @ 1750 rpm Input 35 rpm
Bolt Centers w/ Vertical Base Kits (in) 8 3/8 x 4 7/8
Housing Material Cast Iron
Washdown Duty No
Frame Size 56C
Max. Input HP @ 100 rpm 0.057 hp
Use With 721
Output Torque @ RPM 750 in lb @ 1150 rpm, 857 in lb @ 1750 rpm
Family Name SRF
Max. Overhung Load @ 1750 rpm 700 lb/in
Input Configuration C-Face Coupled
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Bolt Centers w/ Vertical "J" Base Kit (in) 8.63 x 2.63
Input (Shaft or Bore) Size 5/8 in
Base to Shaft Center Height w/Low Vert. Base Kit 3.13 in
Center Distance 2 1/16 in
Bore Code B5
Base to Centerline of Output Shaft 2 9/32 in
Shaft Assembly Code G
Worm Position Universal
Box Length 6 in
Base to Centerline of Input Shaft 4 11/32 in
Weight 38.1 LB
EAN or UPC 889208928244
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