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All Categories > Flexible Couplings > Fluid Couplings > Mesur-Fil Fluid Couplings > Model HSD Mesur-Fil Fluid Coupling > Item # 6-609-005-001-0000  
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Item # 6-609-005-001-0000, Model HSD Mesur-Fil Fluid Coupling

Hydro-sheave couplings are mounted to the motor shaft end and provide minimal overhung loads for parallel (belt-driven) shaft applications. The smaller sizes (7-12.4) are installed very quickly and easily utilizing a slotted collet in which no drilling or tapping is required. The slotted collet is finished bored to fit standard NEMA B motor shaft dimensions. The larger sizes (15-24) are installed with a center locating bolt that does require drilling and tapping to ensure proper mounting. The Model HSD Fluid Coupling consists of a basic fluid coupling, input and output group, and a standard customer supplied QD type sheave. The sheave is mount ed on a coupling that has been installed on the end of a driveshaft.

Unit of Measure: Imperial Metric Both

Specifications  · Tolerance  · Note




Bore Size

1-1/8 in

Dimension A

10.25 in

Dimension B

4.70 in

Dimension C

9.35 in

Dimension D

0.77 in

Dimension Q

2.736 in

Dimension R

1.12 in

Dimension S

1.45 in

Dimension T

3.53 in

Dimension U

3.313 in

Dimension V

5/16-18 in

Dimension X

2.50 in

Q. D. Hub Size


Weight (Less Oil)




Maximum Speed

2600 rpm

Casting on Housing

216438 A
216439 A


Wichita Clutch

Dimension D

up to 2 inch: +0.001/-0.000
from 2 to 4 inch: +0.0015/-0.000

Dimension W

up to 0.500 inch: +0.002/-0.000
from 0.625 to 1 inch: +0.003/-0.000

Do not use Eaton QD sheaves.
Bolt pattern is not the same.