Oceanic Cable Block

IN6989.250 – Cable ∅ – 6 mm
IN6989.322 – Cable ∅ – 8 mm
IN6989.375 – Cable ∅ – 9.5 mm
IN9417.750 – Cable ∅ – 19 mm
IN11118.680 – Cable ∅ – 17 mm
IN11118.563 – Cable ∅ – 17 mm

 

LIGHT ENOUGH TO ALIGN TO THE LOAD

Harken Oceanic cable blocks are used on research vessels to safely lead data cables and towed objects overboard. At only 19.3 kg (42.5 lb), the 500 mm (19.7″) sheave diameter block is light enough to align to the load, optimizing cable tracking.

Oceanographic research
The Oceanic cable block is used by Woods Hole Oceanographic Institute, University of Rhode Island (USA), and University of Alaska – Fairbanks oceanographic research departments, as well as many other research organizations.

Maintenance is easy
Flushing the block with fresh water after use will keep the dry-running bearings free rolling. If further maintenance is required, one hex wrench is all you need for disassembly. All the bearings are captive, so no need to worry about losing parts.

Oceanic block durability

Durability
Sideplates are constructed of hardcoat-anodized 6061-T6 aluminum for strength, durability, and corrosion resistance. They are PTFE-coated for a smooth surface.

Oceanic block bearings

Bearings
Delrin® roller bearings are housed in a center cage to keep them parallel for low-friction efficiency. The large diameter bearing cage reduces friction and spreads the load. Captive Torlon® ball bearings handle sideloads.


Oceanic block large diameter sheave

Large diameter sheave 
The block’s open center helps move the center of gravity toward the shackle, improving the block’s ability to align with the load. The sheave’s groove detailing can be designed to suit specific data cable diameters.

Oceanic block Design

Design

The block’s wide throat allows passage of data cable terminals. The sheave’s durable, lightweight Nylatron® material has high mechanical stiffness, resists static electricity, and has excellent wear resistance. Plastic isolators and helicoils are used to minimize corrosion between aluminum and stainless steel. The Oceanic cable block is UNOLS
compliant.

Oceanic block options

Options
The block is designed to work with an optional magnetic Hall effect sensor.

 

 

SPECIFICATIONS

Block

Sheave

Weight

Cheek Gap

Cable

Max rated load

in

mm

lb

kg

in

mm

in

mm

kN

lbs

IN6989.250

20

500

43

19

2.25

57

0.250

6

84.49

19,000

IN6989.322

20

500

43

19

2.25

57

0.322

8

84.49

19,000

IN6989.375

20

500

43

19

2.25

57

0.375

9.5

84.49

19,000

IN9417.750

29.52

750

150

68

4

101.6

0.750

19

175.66

39,500

IN11118.680

30.5

775

233

105.68

4

101.6

0.680

17

355

80,000

IN11118.563

30.5

775

233

105.68

4

101.6

0.563

17

355

80,000

 

Oceanic cable block case study

 

Nylatron is a registered trademark of the Quadrant Group.
Delrin is a registered trademark of E.I duPont de Nemours and company or its affiliates.
Torlon is a registered trademark of Solvay Advanced Polymers.

Specifications

Weight

IN6989.322 = 19kg (43lbs); IN6989.250 = 19kg (43lbs); IN6989.375 = 19kg (43lbs); IN9417.750 =68kg (150lbs); IN11118.680 = 105.68kg (233lbs); IN11118563 = 105.68kg (233lbs)

Max rated load

IN6989.322 = 84.49kN; IN6989.250 =84.49kN ; IN6989.375 = 84.49kN; IN9417.750 = 175.66kN; IN11118.680 = 355kN; IN11118563 = 355kN

Q: Is the Oceanic Cable block compliant with any industry bodies?
A: Yes. It is compliant with UNOLS.

Q: Does Harken provide a Maximum Capability Document?
A: Yes. Please contact Harken.

Q: What linear speed can it handle?
A: 60 m/min (196ft/min.

Q: What is the lifespan of the block?
A:Harken recently serviced some 10-year-old blocks. Regularly flushing the blocks with fresh water will help extend their life before service is required.

Q: Do you offer alternative sheave diameters?
A: Yes. The sheave groove detailing can be designed to suit specific cable diameters. Please email your requirements for a quote.

The users must follow the manufacturer's instructions for each component of the system. These instructions must be provided to the user of this equipment, and must be read and understood by the user before use. Manufacturer's instructions must be followed for use and maintenance of this equipment. Alternations, or misuse of this equipment, or failure to follow these instructions can result in serious injury or death.