Model: 478-28A

Flexible Shaft Coupling

Properties:

Counterbore Diameter

3.7500 inches first end

Counterbore Diameter

3.6250 inches second end

Counterbore Depth

0.3750 inches second end

Counterbore Depth

0.9380 inches first end

Overall Length

10.312 inches

Outside Diameter

7.625 inches

Taper Minor Diameter

2.4062 inches first end

Keyway Width

0.625 inches second end

Keyway Width

0.750 inches first end

Keyway Depth

0.2810 inches first end

Keyway Depth

0.3440 inches second end

Thread Size Designator

1/2-13 both ends

Bore Diameter

2.6240 inches both ends and 2.6250 inches both ends

Bore Length

4.8120 inches second end

Bore Length

5.4380 inches first end

Bore Shape

Straight second end

Bore Shape

Tapered first end

Design Type

Silent chain

Keying Facility Quantity

1 both ends

Keying Facility Type

Keyway first end

Keying Facility Type

Keyway second end

Securing Method

Threaded hole second end

Threaded Hole Quantity

1 both ends

Threaded Hole Location

Both ends: located on top of key on straight bore end, 2-3/4 in. From end of hub

Features Provided

Keyway and exposed coupling bolt type and chain cover

Taper Largest Diameter

2.8740 inches first end and 2.8750 inches first end

NSN

3010-00-517-1845

Part Number

478-28A

Description

Coupling,shaft,flexible

CAGE

83004

A device for connecting the ends of two shafts so that rotary motion of one shaft is transmitted to the other shaft. It is constructed to allow for slight misalignment of shafts both linear and angular.

Part 478-28A NSN 3010-00-517-1845

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

04459

FIIG:

A522B0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

126880

UFC:

64300

LTL:

RATING VARIABLE

LCL:

WCC:

593

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 8483608000
SITC: 74860
End Use: Industrial machines, other
NAICS: 333613
USDA: 1

Freight Class: Shaft couplings, except universal joints