The following information should be specified:

1. Stock number (if known)
2. Sheave Size
3. Block Number (Catalog number)
4. Number of Sheaves
5. Type of Bearing: (BB) Bronze Bushd, (RB) Roller, (TB) Tapered Roller
6. Type of Hook or Shackle
7. Wire Rope Diameter.

All crane and some contructions blocks are available as shown or with swivel shackle assembly, duplex swivel hook assembly or quadruple hook assembly (as illustrated on page 249).  Various combinations of bearing assemblies can be furnished; such as bronze bushed sheaves and swivel hooks, roller or tapered roller bearing sheaves and hook assemblies or a combination of bronze, roller or tapered roller bearings.

EXAMPLE:
18" 380 Series, Triple Sheave, Roller Bearing Crane Block with Roller Bearing Swivel Hook, 60 ton, light weight, 1" wire rope diameter.
Model Number M60T18L, Stock Number 2012187

SHEAVES
The following information should be specified:

1. Stock number (if known)
2. Sheave O.D.
3. Bearing Type or Plain Bore
4. Shaft or Bore Size
5. Hub Width
6. Rim Width
7. Wire Rope Size
8. Special Machine Features
9. Special Finishes.

Alemite lubrication through the hub of the sheaves can be installed on special order. If hub or rim dimensions necessitate a dimension other than those shown in this catablog, please cotact:  The Crosby Group, Inc. for minimums and maximums.  Tapered roller bearing sheaves show width over bearing cones, which cannot be altered. Price and delivery for your special needs, if not shown, are available upon request.