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Underhung – 59 Series

Underhung – 59 Series

Overview

The Underhung –59 Series is an underhung style head block with fully enclosed sheaves. Typically the Underhung –59 Series is supported by two structural I-beams. Depending on the application, these head blocks may need to be welded into position after final alignment.

Key Benefits

  • Benefit #1
  • Benefit #2
  • Benefit #3
  • Benefit #4

Features

  • ASTM Class 30 grey iron or nylon sheave.
  • Equal pitch diameter on rope and cable grooves for smooth operation.
  • Tapered roller bearings.
  • Base angle legs turned in to allow close mounting centers.
  • 10-gauge side plates fully enclose sheave; 16″ (40.6 cm) blocks have 7-gauge side plates.
  • Side plates are bolted and welded to the base angles for extra strength.
  • Six spacers between the side plates, three prevent cables from escaping the sheave grooves.
  • Base angles punched with alternating slots and holes for simple easy installations.
  • Mounting clips available, please provide steel dimensions.
  • Underhung blocks may need to be welded to head beams after final alignment. Clip angles are recommended for double beam mounting. Mounting with clips or to single beams will require welding. Consult the factory for specific information.
  • Head block capacities are affected significantly by mounting conditions, please see the tables in the Ordering section for additional capacity information.

Options

Sheave Rope
Diam.
Lines Bearing Cast Iron
Prod. Code
Weight Nylon
Prod. Code
Weight RWL
(capacity)
Single Purchase
8″ (203 mm) 3/4″ (19 mm) 6 @ 1/4″ (6 mm) 1″ (25.4 mm) 100-60859C25 46 lb (20.9 kg) Table
8″ (203 mm) 3/4″ (19 mm) 8 @ 1/4″ (6 mm) 1″ (25.4 mm) 100-80859C25 52 lb (23.6 kg) Table
12″ (305 mm) 3/4″ (19 mm) 6 @ 1/4″ (6 mm) 1″ (25.4 mm) 100-61259C25 72 lb (32.7 kg) 100-61259N25 40 lb (18 kg) Table
12″ (305 mm) 3/4″ (19 mm) 8 @ 1/4″ (6 mm) 1″ (25.4 mm) 100-81259C25 79 lb (35.8 kg) 100-81259N25 41 lb (18.6 kg) Table
12″ (305 mm) 3/4″ (19 mm) 10 @ 1/4″ (6 mm) 1″ (25.4 mm) 100-101259C25 86 lb (39 kg) Table
16″ (406 mm) 1″ (25.4 mm) 6 @ 3/8″ (9.5 mm) 1-1/2″ (38 mm) 100-61659C381 139 lb (63 kg) Table
16″ (406 mm) 1″ (25.4 mm) 8 @ 3/8″ (9.5 mm) 1-1/2″ (38 mm) 100-81659C381 147 lb (66.7 kg) Table
Double Purchase
12″ (305 mm) 3/4″ (19 mm) 6 @ 1/4″ (6 mm) 1″ (25.4 mm) 1CD-61259R 72 lb (32.7 kg) 1ND-61259R 40 lb (18 kg) Table
12″ (305 mm) 3/4″ (19 mm) 8 @ 1/4″ (6 mm) 1″ (25.4 mm) 1CD-81259R 79 lb (35.8 kg) 1ND-81259R 41 lb (18.6 kg) Table

Wire Guide Blocks: Change the “R” suffix to “W” in the part number for blocks with tieoffs for arbor wire guides.

Tieoffs: Tieoffs for wire guided clews are also available.

RWL: The recommended working load (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. The mounting of the head block has a major effect on the RWL, as shown in the tables.

Construction

 

Ordering Information

Please call your Wenger | J.R. Clancy representative so we can thoroughly understand your needs in order to provide the best solution and estimate.