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Sheave and Hook Configurator
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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 hubs axis so theres 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 its 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.
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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. Its flame - cut from closely checked
stock, so theres no inherent web/rim flaw as you find in cast sheaves. Theres 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.
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Flame
hardened
groove.
Crosbys 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
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