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Boston GearBKF721B-20S-B5-J

BKF721B-20S-B5-J

700 Series C-Face Quilled Bost-Kleen Reducer
Item #102802280
  • 2 1/16" Center Distance
  • 20:1 Ratio
  • 56C Frame
  • C-Face Quilled Input
  • Right Output
  • Top Worm Position
  • Mobil SHC634 Synthetic Lubricant
  • Cast Iron, White Epoxy Coating
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Boston GearBKF721B-20S-B5-J
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    Shipment Options
  • 2 1/16" Center Distance
  • 20:1 Ratio
  • 56C Frame
  • C-Face Quilled Input
  • Right Output

features

  • Washable
  • Corrosion-resistant
  • Durable white epoxy finish
  • Cast iron housing
  • Plated pressure relief valves
  • Double lipped oil seals
  • 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

compliances

  • 0

caution

  • Use of external guides or supports is strongly recommended for overhead mounting.
Input HP @ RPM 0.86 hp @ 1150 rpm, 1.4 hp @ 1750 rpm
Housing Material Cast Iron¦White Epoxy Coating
Output Torque @ RPM 782 in lb @ 1150 rpm, 892 in lb @ 1750 rpm
Thermal Input Horsepower @ 1750 RPM N/A
Frame 56C
Base to Shaft Center Height w/High Vert. Base Kit 4.88 in
Motor Application Washdown Duty
Max. Overhung Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Max. Overhung Load @ 1750 rpm 700 lb/in
Fan Cooled No
Bolt Center 6 3/8 in x 4 11/16 in
Base to Shaft Center Height w/Low Vert. Base Kit 3.13 in
Max. Thrust Load @ RPM 700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Base to Centerline of Output Shaft 3 in
Bolt Centers w/ Std. Base Kit (in) 6 3/8 x 4 11/16
Box Length 6 in
Max. Input HP @ 100 rpm 0.11 hp
Frame Size 56C
Washdown Duty Yes
Center Distance 2 1/16 in
Reduction Type Single Reduction
Torque Out @ 1750 rpm 892 in lb
Output RPM @ Input RPM 88 rpm @ 1750 rpm
Bolt Centers w/ Vertical "J" Base Kit (in) 8.63 x 2.63
Box Width 5 3/16 in
Shaft Assembly Code J
Worm Position Top
Use With 721
Lubrication Mobil SHC634 Synthetic
Base Yes
Output RPM @ 1750 rpm Input 87.5 rpm
Bolt Center Length x Bolt Center Width 6 3/8 in x 4 11/16 in
Bolt Centers w/ Vertical Base Kits (in) 8 3/8 x 4 7/8
Base to Shaft Center Height w/Std. Base Kit 4.81 in
HP @ RPM 1 hp @ 1800 rpm
Installed Options High Horizontal Base, Mobil SHC634 Synthetic Lubricant
Base to Shaft Center Height w/Vert. "J" Base Kit 3.94 in
Torque Out @ 1150 rpm 782 in lb
Base to Centerline of Input Shaft 5 1/16 in
Output (Shaft or Bore) Size 1 in
Ratio 20:1
Output Configuration Right Output
Box Height 7 3/32 in
Bore Code B5
Input Configuration C-Face Quilled
Family Name F
Max. Thrust Load @ 1150 rpm 700 lb/in
Input (Shaft or Bore) Size 5/8 in
Weight 42.0 LB
EAN or UPC 781711573266
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