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McKissick sheaves
come in a variety of sizes to suit your specific applications. Check
the tables for the size, bearing style and price that best fits your
application. For applications that require unique specifications
Crosby can make minor modifications to many of the sheaves listed at
a reasonable charge. We can also custom design and manufacture
sheaves to your exact requirements. Contact Crosby Sales to order
McKissick sheaves and include the stock number and quantity. For
special requirements or custom designed sheaves, furnish the following
important information:
| Sheave
and Hook Configurator |
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- Wireline
Size
- Shaft
Diameter
- Weight
Requirements
- Hub
Diameter
- Bore
Finished
|
- Nominal
Outside Diameter
- Hub
Width
- Rim
Width
- Nominal
Tread Diameter
- Other
Special Requirements
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ROLL
FORGED SHEAVE FEATURES
- Unique upset
roll forging process provides a thicker groove section for extra strength.
- Stepped Hubs
are precisely centered and mechanically locked in place.
- Wireline grooves
on sheave diameters of 14" and larger are flamed hardened for
extra wear resistance.
- All sheaves
have solid steel webs with holes for easy handling.
- Sheave weights
can be made heavier or lighter than shown to fit your specific application.
- For more information
ask for our special brochure describing the complete roll forging
process.
McKissick®
Roll Forged™ Sheave CONFIGURATOR
The
McKissick® Roll Forged™ Sheave CONFIGURATOR
system has been developed to simplify the selection and odering of
McKissick® Roll Forged™ sheaves. Although
McKissick® can custom manufacture any Roll-Forged™
sheave to your exact requirements, we have developed the system
to allow quick and easy selection of the proper standard McKissick®
Roll Forged™ sheave required to meet your applications.
Using standard sheaves will reduce the lead time in getting the sheave
to you, thus saving you time and money.
For more information, see page 337, or
contact your local authorized Crosby distributor.
SHEAVE
BEARING APPLICATION INFORMATION
| BRONZE
BUSHING - Slow
line speed, moderate load and moderate use,
Maximum Bearing Pressure (BP): 4500 PSI
Maximum Velocity at Bearing (BV): 1200 FPM
Maximum Pressure Velocity Factor (PV): 55000
| Formula
for BP = |
Line
Pull x Angle Factor
(see page 293) |
|
Shaft
Size x Hub Width
(see example). |
PLAIN BORE -
Very slow line speed, very infrequent use, low load.
ROLLER
BEARING -
Faster line speeds, more frequent use, greater load. |
Example:
Using
a 14 in. sheave (917191) with a 4600 lb. line pull and
a 80 degree angle between lines, determine maximum allowable
line speed.
BP = 4600 lbs. x 1.53 ÷ 1.50 x 1.62 = 2896 PSI
(Line Pull) (Angle Factor)
(Hub Width)
(Shaft Size)
BV = 55000 ÷ 2896 = 19FPM
(PV Factor) (BP) |
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