Boston Gear

SBKF721B5B5G

700 Series C-Face Quilled Bost-Kleen Reducer w/Stainless Epoxy

Item #102943134

2 1/16" Center Distance
5:1 Ratio
56C Frame
C-Face Quilled Input
Left Output

Top Worm Position

No Lubricant

Cast Iron, Stainless Steel Epoxy Coating

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Product Details

2 1/16" Center Distance
5:1 Ratio
56C Frame
C-Face Quilled Input
Left Output

features

Washable
Corrosion-resistant
Cast iron housing
Plated pressure relief valves
Double lipped oil seals
Excluder seal on output shaft
Hard nontoxic metallic finish
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

caution

If the bearing is to be shrink fitted, care is required to prevent damage to the bearing. Cool the bearing gradually. Do not cool the bearing below -20 °F (-28 °C). Dry ice or other super cool materials should not be used. Pounding the bearing in a chille

Specifications

Housing Material	Cast Iron, Stainless Steel Epoxy Coating
Torque Out @ 1750 rpm	620 in lb
Frame	56C
Motor Application	Washdown Duty
Box Length	6 in
Base to Shaft Center Height w/Std. Base Kit	4.81 in
Base to Shaft Center Height w/Vert. "J" Base Kit	3.94 in
Max. Overhung Load @ 1750 rpm	700 lb/in
Family Name	SBKF
Installed Options	High Horizontal Base
Output Torque @ RPM	575 in lb @ 1150 rpm, 620 in lb @ 1750 rpm
Output Configuration	Left Output
Thermal Input Horsepower @ 1750 RPM	N/A
Bolt Centers w/ Vertical Base Kits (in)	8 3/8 x 4 7/8
Bolt Center	6 3/8 in x 4 11/16 in
Base to Shaft Center Height w/Low Vert. Base Kit	3.13 in
Washdown Duty	Yes
Lubrication	None
Max. Thrust Load @ RPM	700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Worm Position	Top
Base to Centerline of Output Shaft	3 in
Use With	721
Output RPM @ Input RPM	350 rpm @ 1750 rpm
HP @ RPM	3 hp @ 1800 rpm
Bolt Centers w/ Std. Base Kit (in)	6 3/8 x 4 11/16
Output (Shaft or Bore) Size	1 in
Input HP @ RPM	2.33 hp @ 1150 rpm, 3.66 hp @ 1750 rpm
Output RPM @ 1750 rpm Input	350 rpm
Bolt Centers w/ Vertical "J" Base Kit (in)	8.63 x 2.63
Box Height	7 3/32 in
Reduction Type	Single Reduction
Center Distance	2.0625 in
Max. Input HP @ 100 rpm	0.3 hp
Fan Cooled	No
Input Configuration	C-Face Quilled
Base	Yes
Box Width	5 3/16 in
Input (Shaft or Bore) Size	5/8 in
Bore Code	B5
Base to Shaft Center Height w/High Vert. Base Kit	4.88 in
Max. Overhung Load @ RPM	700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Shaft Assembly Code	G
Torque Out @ 1150 rpm	575 in lb
Ratio	5:1
Base to Centerline of Input Shaft	5 1/16 in
Frame Size	56C
Max. Thrust Load @ 1150 rpm	700 lb/in
Weight	29.0 LB