Description
For special requirements or custom designed sheaves, furnish the following important information:
- Wireline Size
- Shaft Diameter
- Hub Diameter
- Bore Finished
- Nominal Outside Diameter
- Hub Width
- Rim Width
- Nominal Tread Diameter
- Other Special Requirements
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.
- Sheaves available in sizes from 12″ – 72″, and wireline sizes from 3/8″ – 3″.
- For more information, ask for our special brochure describing the complete roll forging process.
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 ÷ Shaft Size x Hub Width
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. (Line Pull) x 1.53 (Angle Factor) ÷ 1.50 (Hub Width) x 1.62 (Shaft Size) = 2896 PSI
BV = 55000 (PV Factor) ÷ 2896 (BP) = 19 FPM
Note: For underwater sheave applications, special bronze bushings are available.
Note: Consult the bearing manufacturer for applicable load.