Yale Lifting Solutions Provides 200-Ton Test Rig for Hook Proof Load Testing

Yale Lifting Solutions Provides 200-Ton Test Rig for Hook Proof Load Testing

Test Rig
200-ton capacity horizontal test rig is used to proof load test humble hooks in the South African gold mining industry.

Yale Lifting Solutions was recently approached by a long-time client in the South African gold mining industry to provide a 200-ton capacity horizontal test rig used to proof load test humble hooks. Humble hooks are safety devices used to connect winder ropes to the main personnel cages and ore conveyances on hoists in vertical mine shafts.

How does the test rig work?

A humble hook is installed in the test rig and the operator sets the testing parameters. The test rig then automatically carries out the test and, upon completion, produces a test certificate containing relevant testing information that can be printed out or saved electronically. Typically, the rig tests each humble hook to 65 tons, but has a maximum testing capacity of 200 tons if needed. Each rig weighs more than 5,500 kg. (12,000 lbs.).

Also, because safety is a critical part of the way Columbus McKinnon does business, each test rig is fitted with a safety cage to prevent possible injury should something fail during the testing process. By use of strategically positioned limit switches working in conjunction with the control program, the test rig will only operate if the cage is closed. Once this test is complete, the humble hooks undergo an ultrasonic test before they are put into storage awaiting installation on the hoist.

In South Africa, it is a legal requirement that a short length of the front end of each winder rope on a mine hoist is cut off on a regular basis. Then, this wire rope sample is submitted to a testing laboratory for destructive testing and inspection, to monitor the residual strength of the rope. It is normal practice to replace the humble hook at the same time that the front end is cut. The humble hook in service is removed and the tested humble hook is installed in its place. To date, this is one of the largest manufacturing projects Yale Lifting Solutions has carried out in its newly formed manufacturing department.

Christie Lagowski
Christie Lagowski is a Communications Specialist for Columbus McKinnon Corporation.
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5 Replies to “Yale Lifting Solutions Provides 200-Ton Test Rig for Hook Proof Load Testing”

  1. Gisela,
    I lost hope that you had not replied, I was expecting you to send directly to my email address as indicated above.
    I have not checked on this site since then until today.
    Thanks for the detailed info you have given, I really needed this. However, since I just need one machine for now for both slings and chain/lever hoists I choose the static testing rig. I will send the specs on your suggested address: cmco.live@cmworks.com.
    What is your comment on my decision – I need to be testing slings please.
    My Kind Regards,
    Linus Chate.

  2. Hello Linus,

    Our apologies for the delay in response.
    We have reached out to our team in South Africa and here are their comments:

    For hydraulic test rigs suitable for lifting appliances, we consider 2 design options:

    1) A dynamic test rig. This is used for products such as manual chain hoists and lever hoists, where a load is applied while the hoist is operated and the load chain is worked over the load sheave over some distance. This allows for testing the product through all the working parts, such as gear teeth and load sheave and is more appropriate than a static pull test.

    2) A static test rig. This is used for load testing products such as slings, shackles, beam clamps. The product is loaded to a predetermined load and held for a specific period.

    The rig can be powered electrically or manually (the latter is much slower but lower in cost and quite suitable for manual chain hoists and lever hoists.)

    To determine the full specification, we would need to know the maximum and minimum length that would be pulled. For example, for testing slings one needs to know the length of the longest sling that would be tested. Then we would plan for the anchor point to be adjustable, so that slings of any length up to the maximum can be tested.

    If it is a dynamic test rig we would also need to know the length over which the hoist would be tested. That is, the stroke of the cylinder in the test rig.

    Include a list of the products and capacities that are intended to be tested, to ensure that enough space and width is provided in the rig design.

    For electrically powered rigs, please specify what electricity supply is available.

    The test load can be measured and set using a calibrated pressure gauge or a load cell. We recommend having both on a rig as a back-up, and to ensure the correct load is being displayed.

    Finally, decide if a printer is required to be connected, to record the loading during each test. A variety of options are available for storing and recording test results.

    If you can please send your specs to our cmco.live@cmworks.com email address, I will personally forward them to right person at our office in South Africa.

    Many thanks,
    Gisela

  3. I need sources and information about Testing Rigs for Lifting appliances. After serving lifting appliances, I need to test them; I need a horizontal Testing Rig with a cage.
    We have a vertical one now we need a horizontal one. We would also like to be testing slings.
    Specs for one which can test up to 50 tons.

    Regards.
    Linus

  4. Hello Hisham,
    We reached out to our group in South Africa and will be emailing you their response along with their contact information.
    Thank you for your interest!
    Christie

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