Multi-Sheave Blocks

Upright Multi-Sheave Block
4NR-20855R

• Blocks may be mounted upright or underhung.
• Blocks with three or more sheaves are constructed with the base angle legs turned in to allow close mounting centers. Base angles are notched to clear ropes and cables.
• Nylon or ASTM Class 30 grey iron sheaves.
• 17mm sealed precision ball bearings.
• 12 gauge side plates located outside and between sheaves.

Ordering Info

Drawings

More Info

Ordering Information
Sheave Diam.	Lines	Bearings	Cast Iron Prod. Code	RWL	Wt.	Nylon Prod. Code	RWL	Wt.
8-5/8"	2	17mm BB	4CR-20855R	900 lb	27 lb	4NR-20855R	900 lb	21 lb
8-5/8"	3	17mm BB	4CR-30855R	900 lb	35 lb	4NR-30855R	900 lb	26 lb
8-5/8"	4	17mm BB	4CR-40855R	900 lb	42 lb	4NR-40855R	900 lb	31 lb
8-5/8"	5	17mm BB	4CR-50855R	900 lb	50 lb	4NR-50855R	900 lb	36 lb

Change the 3rd character from "R" (3/4" rope) to "C" for 1/4" cable.

RWL: RWL is maximum load that can be applied to a block which is in "like new" condition and has been properly installed, maintained and operated.

Multi-Sheave Blocks

Nominal Sheave Diam No. Lines DIM L DIM H DIM W DIM A DIM B DIM C (A) DIM D (Sheave Diam) 8" 2+ 24" 11-1/2" 5-11/16" 15-1/16" 10-7/16" 2-9/16" 8" 8" 3 24" 11-1/2" 5" 15-1/16" 10-7/16" 2-9/16" 8" 8" 4 24" 11-1/2" 6-1/2" 13-5/16" 10-7/16" 2-9/16" 8" 8" 5 24" 11-1/2" 7-5/8" 13-5/16" 10-7/16" 2-9/16" 8"

* DIMENSION TO 3/4" DIA ROPE C/L WHEN BLOCK IS USED IN UNDERHUNG APPLICATION.
+ 2 LINE BLOCK HAS BASE ANGLES TURNED OUTWARD.

 

Visit the links below for more information:

RWL Definition

Mounting Clips for Blocks

Specification

Multisheave Blocks

Other Information

About our blocks

Recommended mounting dimensions

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