Oilfield drilling is one of the
most common rigging and mining projects that are handled by shipping and
rigging companies. Specialized equipments such as blocks and sheaves are
utilized for the purpose of oilfield drilling. These components are manufactured
by different brands and companies associated with the marine equipments
industry. One of these brands, known as the Crosby Group, is known for
producing an extensive line of sheaves and blocks that belongs to the McKissick
series. These McKissick sheaves and McKissick blocks have already been widely
praised in various sectors of the shipping industry due to their functional
effectiveness. So let’s take a look at the various features of these equipments
and the advantages of using them.
Stepped hub design offers better service
The stepped hub design of these
equipments can get rid of stress failure in weld, a common issue associated
with the traditional sheave designs. The hub is placed in position with proper
metal to metal contact. It helps to ensure accurate alignment to sheave axis
which guarantees that there is no looping or wobble of rotating sheave. This
high precision alignment of the McKissick sheaves and hub greatly enhances
bearing life of the system.
Roll forging of the sheaves offer better life performance
Roll forging is a process that
allows forming the flange and groove walls in numerous steps, which in turn
eliminates the necessity to split the groove. While groove splitting
automatically reduces the strength of the groove section, this forging process
allows in adding more strength to it. It is for this reason that McKissick
sheaves comes with the guarantee of enhanced life performance. The sheaves are
forged in a way that helps to distribute wire rope force evenly over the
properly formed load surface. The uniformity of roll-forged groove also adds to
the life of the wire rope.
Solid steel body without any casting adds to robustness of the sheaves
Each and every McKissick sheave
unit is made out of a single plate made of solid carbon steel. There are no
inherent web or rim flaws associated with these sheaves like those that are
commonly found with the cast sheaves. The standard McKissick roll-forged
sheaves also offer better balance as well as even distribution of forces.
Unlike cast sheaves that often has issues like uneven stress and easy failure;
the McKissick sheaves are completely protected from the possibility of such
occurrences.
Extensive line of sheaves offered by Crosby
The McKissick roll-forged sheaves
come in an extensive line of sizes ranging anywhere between 12 and 72 inches.
The bearing styles and their prices also vary greatly, thereby offering plenty
of choices for the buyers. Moreover, Crosby also offers custom designed
McKissick sheaves as well as makes small modifications to various standard
sheave models so that they can fit the requirements for special applications.
Apart from McKissick sheaves and
McKissick blocks, Crosby Group is also known for designing and developing
numerous other types of marine equipment as well, such as Mooring sockets, hooks
& swivels, wire rope end fittings and stainless steel wire rope units.
