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Latest News

What Are The Benefits Of Mining Wire Rope With Plastic Encased Core / Plastic Covered Core?

In mining hoist ropes with plastic encased core, a plastic sheathing is inserted and impregnated between the outer layer of strands and the inner layer(s) of strands. This plastic filler reduces potential sliding of the various components while still allowing necessary movement. The plastic also fills the free space between the exterior strands which acts as a cushion and noticeably prevents friction wear damages. But perhaps the biggest advantage of this product is that the plastic covers the core, so it’s able to seal the lubrication in the inner strands and keep out the polluting agents that lead to corrosion.

Northern Strands carries all major types of mining wire rope and attachments.

The types of mining hoist ropes:

  • Sinking Rope
  • Hoist Ropes
  • Balance Ropes
  • Guide Ropes
  • Surface Ropes

  • The types of mining hoist rope attachments and hardware:
    • Chaseblock & Link Plates
    • Coarse Adjusting Linkage
    • Fine Adjustment Linkage
    • Glands
    • Pins
    • Shaft Sinking Hooks
    • Sockets
    • Solid Thimbles
    • Swivels
    • Thimble Cappel
    Northern Strands Mining Wire Rope Catalogue http://www.northernstrands.com/pdf/technicallibrary/Wire%20Rope%20Product%20List.pdf 

    Contact Northern Strands Mining Wire Rope and Attachments division to learn more or visit our webpage
    Phone 306-242-7073
    Toll free 1-800-242-7073
    Email info@northernstrands.com


    Picture: Compacted 35 X 7 Hoist Rope

    Northern Strands Releases New Mining Wire Rope Catalogue

    Northern Strands is excited to announce the release of our Mining Wire Rope Catalogue!  Our catalogue contains detailed info on numerous types of mining ropes including hoisting, surface mining, balance and guide ropes.  Plus, our catalogue offers descriptions of mining wire rope applications and features to help you pick the best wire rope for the job.  It also informs the public of the top brands Northern Strands carries in wire rope lubricants, attachments and linersRecently Northern Strands has become the North American supplier for Becorit hoist drum liners and the Canadian supplier for Corelube wire rope lubrication products.

    Below is a downloadable PDF of our Mining Wire Rope Catalogue.     

    Northern Strands Mining Wire Rope Catalogue Email Version.pdf (6.24 mb)

    The above PDF is a convenient email size, but is not a high resolution printable version.  Email info@northernstrands.com to request a quality printed copy of our Mining Wire Rope Catalogue.  

    Watch for our Mining Wire Rope Attachments Catalogue that will be released in the near future.

    To request information or a quote on Mining Wire Ropes please contact:

    Les Nimmo
    Mining Rope Technical Sales
    Phone: 306-242-7073
    Email: lnimmo@northernstrands.com

    Northern Strands is proudly Saskatoon, Saskatchewan owned and operated

    Wire Rope Corner: Did you know that there are different levels of rotation resistance in wire rope?

    Rotation-resistant rope is defined as stranded rope designed to generate reduced levels of torque and rotation when loaded and comprised of two or more layers of strands laid helically around the center, with the direction of lay of the outers strands being opposite to that of the underlying layer.  However, there are different levels of rotation resistance to consider.

     

    Rotation-resistant rope (Category 1):  Stranded rope constructed so that it displays little or no tendency to rotate, or, if guided, transmits little or no torque.  It has at least 15 outer strands and is comprised of at least three layers of strands laid helically over a center in two operations, with the direction of lay of the outer strands being opposite to that of the underlying layer.  This rope is also known as Non-Rotating.

     

    Rotation-resistant rope (Category 2):  Stranded rope constructed so that it has significant resistance to rotation.  It has at least 10 outer strands and is comprised of two or more layers of strands laid helically over a center in two or three operations, with the direction of lay of the outer strands being opposite to that of the underlying layer.  This rope is also known as Low Rotation.

     

    Rotation-resistant rope (Category 3):  Stranded rope constructed so that it has limited resistance to rotation.  It has no more than 9 outer strands and is comprised of two layers of strands laid helically over a center in two operations, with the direction of lay of the outer strands being opposite to that of the underlying layer.  This rope is also known as Spin Resistant.

     

    Come back again in the near future for the next installment of Wire Rope Corner.  Be safe out there.

     

    Northern Strands Mining, Wire Rope, Attachments & Equipment Division excels by providing a wide range of equipment and services, by being the best full service provider of wire ropes, attachments, equipment and service. Truly Mine Hoisting Solutions®.

     

    Northern Strands is proudly Saskatoon, Saskatchewan owned and operated.

     

     

     

     

     

    How Important is Wire Rope Lubrication?

    In order to fully understand the importance of the regular application for wire rope lubrication during the working life of stranded or full locked coil hoisting ropes, it is first necessary to analyze the function of any such lubricant.

    a) Each wire in any wire rope construction must remain as free as possible from adjacent wires so it can move to accommodate its allocated share of the varying rope tension it has to endure.  This is especially important when the rope is performing at high speed and/or under the high wire contact stresses encountered during hoisting.  Rope design is intended to minimize inter wire frictional contact but only by good lubricating practices can this effect be fully accomplished.

    b) The majority of hoist ropes utilized in shafts are subject to corrosion from one cause or another. Shaft water containing a high salt content, chemical fumes, and upcast shafts producing condensation, are among the more notable causes.  Regardless of the cause, it is essential to guard against or retard the certainty of corrosive attack on the steel.  Experience has shown that the application of galvanized wire is only partially successful because the finish soon wears off. Therefore, it is clear that in-service lubricants must possess the following qualities:

    a) Penetrate easily into the rope.
    b) Displace moisture from the internal and external surfaces.
    c) Provide good corrosion protection both internally and externally.
    d) Be resistant to emulsification.
    e) Possess good rope adhesive properties.
    f) Resist removal by mechanical forces.
    g) Possess good anti-wear properties.
    h) Be compatible with the lubricant already employed during rope manufacture. 

    It should be pointed out that in the case of full locked coil and many plastic enhanced hoisting ropes, in-service lubricant is confined solely to the outside wire. This is because the inner rope is already sealed off with adequate lubrication. 

    Without lubrication during the working life, wire ropes may suffer from premature withdrawal from service:

    1) Premature wire breaks occurring in the ropes and caused by internal and/or external corrosion.

    2) Premature wire breaks occurring at the strand interstices due to lack of proper inter strand movement.

    3) Strand displacement, loose wires, and rope waving, leading to loss of cross section stability. Additionally, the correct lubricant is of key importance during rope manufacture.  Through a German study (see chart below), it is proven that the proper lay-up lubricant can have a great effect on rope life. 

    The chart depicts:


    Wire rope un-lubricated
    Wire rope lubricated, but with general lubricant not designed for wire ropes
    • Standard lubricant designed for wire rope wires
    Wire rope application-specific lubricant Plastic enhanced

     

    Northern Strands is an official supplier of Kirpatrick Lubricants in Canada.

    Northern Strands is proudly Saskatoon, Saskatchewan owned and operated.

    Northern Strands presents at Agrium Safety Fair

    Northern Strands delivers presentations on Safety with Rigging at the Agrium Safety Fair.  These presentations included aspects of rigging inspections, examples of rejections and the do's and don'ts of rigging safety.  Northern Strands provided a test bed to perform breaks on lifting slings as part of the presentation.

    The test bed demonstration:

    New web and wire rope slings ( 3/8 x 6ft and 1” 1ply and 2ply ) were supplied for demonstration. Agrium also supplied Northern Strands with 10-12 used wire rope and web slings in varying degrees of degradation. All new slings were benchmarked to have breaking load 5 x Working load limit. All new slings broke above this benchmark. The used slings broke all over the map. Some of the new slings were given a knot and then tested with an expected 50% reduction in breaking load. Slings with knots were 40% to 60% of benchmark. Hitches were also tested ( Choker style ) there were consistent breaks near calculated load. We did have a number of eye breaks on new web and wire rope slings but above projected breaking point.

    Approx. 300 people attended the presentations and were very interested in the demonstration results

    Some of the comments overheard were along the lines of: Who'd of thought...I didn't know that...great to see what we only read about before....guess we don't do that anymore.

    The comments were very positive and it's very likely Northern Strands will be asked by Agrium to give additional presentations on Safety with Rigging at the Agrium Safety Fair next year. 

    Northern Strands is proudly Saskatoon, Saskatchewan, Canada owned and operated.

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