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

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