Model: BK70

Groove Pulley

Special Features:

Epart no. Bk70 is available in bore sizes 0.5000; 0.625; 0.750: 0.938; 1.000; 1.188; 1.250 and 1.438 with varying keyseat dimensions depending on bore size; bushings are available for odd bore sizes

Properties:

Groove Width
0.656 inches
Outside Diameter
6.750 inches
Overall Length
1.531 inches
Bore Diameter
Between 0.500 inches and 1.438 inches
Bore Length
1.469 inches
Pitch Diameter
6.000 inches and 6.400 inches
Material And Location
Iron, cast
Face Width
0.875 inches
Design Form
Spoked
Bore Type
Straight
Bearings
Not included
Groove Quantity
1
Counterbore Feature
Not included
Keying Facility
Included
Keying Facility Type
Integral key
Securing Method
Setscrew
Split Hub Feature
Not included
Web/spoke Relationship To Face Centerline
Not offset
Lightening Hole
Not included
Integral Cooling Vane
Not included
Groove Shape
V
Standard V-belt Section Designation For Which Designed
4l and 5l and a and b
Bore Feature
Included
Securing Location
Aa end
Hub End Outside Diameter And Location
2.375 inches aa end
Distance From Outside Flange/rim To Hub End And Location
0.656 inches aa end and 0.062 inches bb end
Quantity
1
Style Designator
Webbed or spoked
NSN
3020-01-272-8678
Part Number
BK70
Description
Pulley,groove
CAGE
71176

A pulley with one or more grooved faces or rims of the same diameter. For pulleys encased in a shell or frame, see block, tackle. for items specifically designed for aviation, see pulley(1), groove, aviation.

Part BK70 NSN 3020-01-272-8678

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
08109
FIIG:
T353-A
Concept No.:
1
App. Key:
AA
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

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Schedule B and Export
  • Schedule B: 8487900080
  • SITC: 74999
  • End Use: Industrial machines, other
  • NAICS: 333999
  • USDA: 1

Freight Class: Machinery parts not containing electrical features, and not specified or included elsewhere in chapter 84, except ships' propellers

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