Heavy Duty Block Type PB (with Bearing)

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An upgraded version of the latest Heavyduty Block that has gained a good reputation in Japan as well as overseas for its high working load limit. During the design process, we conduct a strength analysis simulation, and confirm shapes using 3D printed samples before we actually start manufacturing. This brand new product has been developed while taking safety and reliability into consideration with various improvements such as the addition of two sets of steel bearings, which produces rotational stability. 

■Material: Special stainless steel, Sheave pin/swivel/swivel pin/toggle pin: SUS304, Grease nipple: SUS303

*The working load does not apply to the becket part. *The working load conforms to the working load of the bearings. *This product contains two steel bearings with rubber seals.

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Key Features

  • Feature 01

    The special design to assure safety and reliability

    Feature 01

    The special design to assure safety and reliability

    A double arm for the top part and a rib structure in the center of the main body distributes the applied load and at the same time these features reduce and optimize the weight of the product. Forged parts are used for swiveling sections where strength is required.

  • Feature 02

    Bearings for smooth rotation

    Feature 02

    Bearings for smooth rotation

    The current model contains one set of shield bearings, whereas this new model has two sets. This helps the rotation stability of the sheave under heavy loads, and improves workability at sea.

  • Feature 03

    Full-fledged system to prevent unintended release and looseness of the pin

    Feature 03

    Full-fledged system to prevent unintended release and looseness of the pin

    To prevent the unintended release of the toggle pin, it can only be removed when it is aligned with the groove. The nut can only be turned when the double ring is pulled.

Drawing / Dimension / Request for quotation

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RFQ Drawing No. List Price Size (Sheave dia.)(mm) No. of sheaves  Max. rope dia.(mm) d(mm) L(mm) L1(mm) L2(mm) D1(mm) B(mm) B1(mm) B2(mm) t1(mm) Hex. Wrench dia.(mm) Bearing nom. No.  Unit Weight(kg) Work Load Limit(t)
AK1854 $1,283.00 125 1 20 22 334 54 159 111 139 27 12 76 5 6207 6.2 2.5
AK1855 $2,097.00 150 1 20 25.5 389 58.5 182 132 167 30 12.5 87 6 6209 9.8 3
AK1856 $2,277.00 175 1 24 29 444 66 205 155 192 34 13.5 96.5 6 6210 13.8 3.5
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