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Boston GearRF721-5-B7-G

RF721-5-B7-G

700 Series C-Face Coupled Reducer
Item #101870880
  • 2 1/16" Center Distance
  • 5:1 Ratio
  • 140TC or 180C Frame
  • C-Face Coupled Input
  • Left Output
  • Universal Worm Position
  • No Lubricant
  • Cast Iron
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Boston GearRF721-5-B7-G
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    Shipment Options
  • 2 1/16" Center Distance
  • 5:1 Ratio
  • 140TC or 180C Frame
  • C-Face Coupled Input
  • Left 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

  • Must be filled to the proper level with the recommended lubricant for your application before operation
Frame 140TC, 180C
Washdown Duty No
Motor Application General Purpose
Frame Size 140TC, 180C
Keyway Size 3/16 x 3/32
Housing Material Cast Iron
Input (Shaft or Bore) Size 7/8 in
Family Name RF
Base to Shaft Center Height w/Vert. "J" Base Kit 3.94 in
Bolt Centers w/ Vertical "J" Base Kit (in) 8.63 x 2.63
Bolt Centers w/ Vertical Base Kits (in) 8 3/8 x 4 7/8
Max. Thrust Load @ 1150 rpm 700 lb/in
Motor HP 2 hp
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Box Length 6 in
Torque Out @ 1750 rpm 620 in lb
Base to Centerline of Output Shaft 2 9/32 in
Lubrication None
Ratio 5:1
Input HP @ RPM 2.33 hp @ 1150 rpm, 3.66 hp @ 1750 rpm
Box Width 5 3/16 in
Base to Shaft Center Height w/Std. Base Kit 4.81 in
Torque Out @ 1150 rpm 575 in lb
Thermal Input Horsepower @ 1750 RPM N/A
Bore Code B7
Output RPM @ 1750 rpm Input 350 rpm
Bolt Center Length x Bolt Center Width 5 in x 2 7/8 in
Base to Shaft Center Height w/Low Vert. Base Kit 3.13 in
Output Torque @ RPM 575 in lb @ 1150 rpm, 620 in lb @ 1750 rpm
Bolt Centers w/ Std. Base Kit (in) 6 3/8 x 4 11/16
HP @ RPM 3 hp @ 1800 rpm
Output Configuration Left Output
Base to Centerline of Input Shaft 4 11/32 in
Base to Shaft Center Height w/High Vert. Base Kit 4.88 in
Worm Position Universal
Max. Input HP @ 100 rpm 0.3 hp
Max. Overhung Load @ 1750 rpm 700 lb/in
Box Height 6 3/8 in
Input Configuration C-Face Coupled
Fan Cooled No
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Bolt Center 5 in x 2 7/8 in
Shaft Assembly Code G
Reduction Type Single Reduction
Use With 721
Output (Shaft or Bore) Size 1 in
Center Distance 2 1/16 in
Output RPM @ Input RPM 350 rpm @ 1750 rpm
Weight 36.1 LB
EAN or UPC 781711526958
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