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

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