Role deviere cablu Crosby®
Drukuj

McKissick® Roll Forged Sheaves

Stepped hub design
proves better.


The McKissick hub is stepped to
eliminate stress failure in the weld,
common in traditional hub designs.
The hub is pressed into place with
complete metal-to-metal contact. This
helps ensure an accurate alignment to
the hub’s axis so there’s no wobble or
lopping of the rotating sheave.
The precision aligned hub / sheave
wheel combination adds to the bearing
life and keeps the sheave on the job
longer.




Closed die upset and
roll forged — not
split.

Upsetting and roll forging forms the
groove and flange walls in multiple
steps, eliminating the need to split and
weaken the groove. This exclusive
forging process adds extra strength to
the critical groove section. You can
count on a McKissick sheave to give
maximum life performance, because
it’s forged to distribute the wire rope
forces evenly over an accurately
formed load surface. Plus, uniformity
of the roll forged groove adds longer
wire rope life.
Full range of standard
sheave sizes.


McKissick roll forged sheaves are
available in a full range of sizes from 12
inches to 72 inches, and bearing styles
and prices that best fit your application.
Crosby also manufactures custom
McKissick sheaves and can make minor
modifications to standard sheaves as
needed for special applications.


Solid steel —
no casting.

Every McKissick sheave starts as a
single piece of solid carbon steel plate.
It’s flame - cut from closely checked
stock, so there’s no inherent web / rim
flaw as you find in cast sheaves.
There’s better balance and better
distribution of forces with a McKissick
roll forged sheave too. Casting can
result in groove wall variations - either
too thick or too thin - causing uneven
stresses and early failure.
Flame hardened
groove.



Crosby’s hardening technique is a
science. It provides a precise maximum
hardness for wear-resistance across the
wire rope contact area. The McKissick
sheave groove is flame hardened to a
minimum 35 Rockwell C for a 140°,
contact area with the wire rope. The
solid steel plate provides the ideal
surface for flame hardening and a
closer tolerance fit to the wire rope to
reduce fatigue and wear.



Bearing selection to
match your job
requirement.


The McKissick Roll Forged sheave is
available in the following
configurations:
• Plain bore
• Bronze bushed
• Roller bearing
• Tapered roller bearing
• Lubrication thru hub
• Key ways
• Set screws