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 7.0

Bore Size

N/A 1-3/8 in

Dimension A

N/A 7.81 in

Dimension B

N/A 3.67 in

Dimension C

N/A 7.05 in

Dimension D

N/A 0.56 in

Dimension Q

N/A 2.149 in

Dimension R

N/A 0.84 in

Dimension S

N/A 1.15 in

Dimension T

N/A 2.54 in

Dimension U

N/A 2.687 in

Dimension V

N/A 1/2-20 in

Dimension X

N/A 2.00 in

Q. D. Hub Size


Weight (Less Oil)

N/A 12.75


N/A 5/16

Maximum Speed

N/A 3600 rpm

Casting on Housing

N/A 216262 A 216405 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.