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Boston GearSRF721-5-B7-G

SRF721-5-B7-G

700 Series C-Face Coupled, Hollow Output Reducer
Item #103599452
  • 2 1/16" Center Distance
  • 5:1 Ratio
  • 140TC or 180C Frame
  • C-Face Coupled Input
  • Hollow Output
  • Universal Worm Position
  • No Lubricant
  • Cast Iron
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Boston GearSRF721-5-B7-G
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    Shipment Options
  • 2 1/16" Center Distance
  • 5:1 Ratio
  • 140TC or 180C Frame
  • C-Face Coupled 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

  • May corrode some metals
  • Not for underwater applications
  • May stress-crack some plastics
  • Does not adhere to concrete or masonry
Output RPM @ Input RPM 350 rpm @ 1750 rpm
Input HP @ RPM 2.33 hp @ 1150 rpm, 3.66 hp @ 1750 rpm
Base to Shaft Center Height w/Low Vert. Base Kit 3.13 in
Worm Position Universal
Output Torque @ RPM 575 in lb @ 1150 rpm, 620 in lb @ 1750 rpm
Max. Overhung Load @ 1750 rpm 700 lb/in
Base to Shaft Center Height w/Vert. "J" Base Kit 3.94 in
Thermal Input Horsepower @ 1750 RPM N/A
Torque Out @ 1750 rpm 620 in lb
Shaft Assembly Code G
Frame Size 140TC, 180C
Motor HP 2 hp
Max. Input HP @ 100 rpm 0.3 hp
Bolt Centers w/ Vertical Base Kits (in) 8 3/8 x 4 7/8
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Lubrication None
Max. Thrust Load @ 1150 rpm 700 lb/in
Washdown Duty No
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Fan Cooled No
Bolt Center 5 in x 2 7/8 in
Bolt Centers w/ Std. Base Kit (in) 6 3/8 x 4 11/16
Output RPM @ 1750 rpm Input 350 rpm
Bore Code B7
Bolt Centers w/ Vertical "J" Base Kit (in) 8.63 x 2.63
Family Name SRF
Housing Material Cast Iron
Base to Centerline of Output Shaft 2 9/32 in
Output (Shaft or Bore) Size 1 1/8 in
Base to Shaft Center Height w/High Vert. Base Kit 4.88 in
Frame 140TC, 180C
HP @ RPM 3 hp @ 1800 rpm
Input Configuration C-Face Coupled
Box Height 6 3/8 in
Base to Shaft Center Height w/Std. Base Kit 4.81 in
Input (Shaft or Bore) Size 7/8 in
Center Distance 2 1/16 in
Box Length 6 in
Box Width 4 1/8 in
Ratio 5:1
Torque Out @ 1150 rpm 575 in lb
Keyway Size 3/16 x 3/32
Bolt Center Length x Bolt Center Width 5 in x 2 7/8 in
Base to Centerline of Input Shaft 4 11/32 in
Reduction Type Single Reduction
Output Configuration Hollow Output
Use With 721
Motor Application General Purpose
Weight 38.1 LB
EAN or UPC 191191151890
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