Products Catalog
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



N/A 9.4

Bore Size

N/A 1-3/8 in

Dimension A

N/A 10.25 in

Dimension B

N/A 4.70 in

Dimension C

N/A 9.35 in

Dimension D

N/A 0.77 in

Dimension Q

N/A 2.736 in

Dimension R

N/A 1.12 in

Dimension S

N/A 1.45 in

Dimension T

N/A 3.53 in

Dimension U

N/A 3.313 in

Dimension V

N/A 5/16-18 in

Dimension X

N/A 2.50 in

Q. D. Hub Size


Weight (Less Oil)

N/A 37.75


N/A 5/16

Maximum Speed

N/A 2600 rpm

Casting on Housing

N/A 216438 A 216439 A


N/A Wichita Clutch


N/A 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


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