Boston Gear

SBKF721B40B5G

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

Item #102943136

2 1/16" Center Distance
40:1 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
40:1 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

Output (Shaft or Bore) Size	1 in
Max. Input HP @ 100 rpm	0.074 hp
Bolt Center	6 3/8 in x 4 11/16 in
Bore Code	B5
Worm Position	Top
Input (Shaft or Bore) Size	5/8 in
Fan Cooled	No
Max. Thrust Load @ RPM	700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
HP @ RPM	0.3333333 hp @ 1200 rpm, 0.5 hp @ 1800 rpm
Bolt Centers w/ Vertical "J" Base Kit (in)	8.63 x 2.63
Thermal Input Horsepower @ 1750 RPM	N/A
Max. Thrust Load @ 1150 rpm	700 lb/in
Output Configuration	Left Output
Ratio	40:1
Base to Centerline of Input Shaft	5 1/16 in
Shaft Assembly Code	G
Bolt Centers w/ Std. Base Kit (in)	6 3/8 x 4 11/16
Base to Shaft Center Height w/Vert. "J" Base Kit	3.94 in
Housing Material	Cast Iron, Stainless Steel Epoxy Coating
Torque Out @ 1750 rpm	876 in lb
Base to Centerline of Output Shaft	3 in
Washdown Duty	Yes
Family Name	SBKF
Frame Size	56C
Base to Shaft Center Height w/Std. Base Kit	4.81 in
Base to Shaft Center Height w/Low Vert. Base Kit	3.13 in
Box Height	7 3/32 in
Installed Options	High Horizontal Base
Use With	721
Bolt Centers w/ Vertical Base Kits (in)	8 3/8 x 4 7/8
Max. Overhung Load @ 1750 rpm	700 lb/in
Max. Overhung Load @ RPM	700 lb/in @ 1150 rpm, 700 lb/in @ 1750 rpm
Center Distance	2 1/16 in
Output RPM @ Input RPM	44 rpm @ 1750 rpm
Base	Yes
Output RPM @ 1750 rpm Input	43.75 rpm
Reduction Type	Single Reduction
Frame	56C
Box Length	6 in
Output Torque @ RPM	785 in lb @ 1150 rpm, 876 in lb @ 1750 rpm
Box Width	5 3/16 in
Base to Shaft Center Height w/High Vert. Base Kit	4.88 in
Motor Application	Washdown Duty
Lubrication	None
Input Configuration	C-Face Quilled
Torque Out @ 1150 rpm	785 in lb
Input HP @ RPM	0.49 hp @ 1150 rpm, 0.81 hp @ 1750 rpm
Weight	29.0 LB