Underhung Loft Block - 19 Seriex
Underhung style, supported by a single structural beam
Nylon or ASTM Class 30 grey iron sheaves
Sealed precision ball bearings (Single line 8″ [203.2 mm] nominal sheave only) or tapered roller bearings
10-gauge side plates
3/4″ (19 mm) drawbolt and steel clip allow a 4″ (101.6 mm) grip adjustment to accommodate a range of beam sizes
A minimum of three spacers between the side plates; to prevent cables from escaping the sheave grooves
*AVAILABLE FOR 1/4″ OR 3/8″ CABLE, SPECIFY.”
19 Series blocks grip the bottom flanges of beams. Blocks have a 3/8″ throat with a grip range of 4″ - 9″. Change the suffix from “R” to “U” for a 3/4″ throat with a 4-1/8″ - 10″ grip range.
To add Idlers to 8″ Underhung Blocks - Change last letter to “I3” or “I6” to indicate 3 or 6 idler grooves.