Products / Ropes / Product Application / Usage Gideline / Proper Ordering Criteria
How to Order for a UMI Steel Wire Rope
When you are sending an enquiry or an order to purchase a steel wire rope, we reqest you to kindly furnish the following information so that you get the exact rope as per your requirements.

The specifications required while enquiring for a Usha Wire Rope.
1. Length of the rope required
Specify the correct length as per your requirement. Too long a rope will negatively influence coiling and will result in premature rope failure and subsequent wastage. A too short rope will not be able to last its full life.
2. Diameter
Try to maintain the same nomenclature as per the pertaining standards, e.g. if you require a rope as per IS, do specify the rope diameter in mm. Alternatively, for example, if you require a API rope, you require to specify the rope diameter in inches, in conformance to the API standards. The nominal diameter usually varies from the actual diameter of a rope. UMI supplies with a rope with an actual diameter -1% to 4 % of the nominal diameter of the rope.
3. Coating/ Finish
A rope can either be ungalvanised or galvanised. In rope nomenclature, we often specify an ungalvanised rope as black.
4. Tensile Grade of steel
This property signifies the strength/ load bearing capacity of the wire rope. Usually, if you procure a rope as per IS specifications, the usual designations are 1770 N/mm2, 1960 N/mm2, or 2160 N/mm2. The other less frequently used tensile designations are 1420 and 1570 N/ mm2. Alternatively, in place of N/mm2, we can use 160 Kgf/mm2, 180 Kgf/mm2, and 200 Kgf/mm2.
5. Construction
A rope is generally made up of number of strands twisted around a core. The strands are themselves formed from a number of wires twisted in a helical fashion. A description of a commonly used crane rope is as follows: 6X 36 (14/7/+ 7/7/1) Irwin This description means that there are 6 strands in the rope, each consisting of 36 wires. The number in the brackets indicate the make up of the strands, starting from the outer wire layer, There are 3 wire layers (separated by "/" sign. the first layer (outer consists of 14 wires, the second layer consists of 7 wires, and 7 small wires and the third layer has 7 wires over a core wire.
6. Core Types
The core of a steel wire rope can be either fibre or steel. The fibre core can further sub divided into natural fibre or artificial fibre (Sisal). In case of steel core, the alternatives can be Independent Wire Rope Core (IWRC) or Wire Strand Core (WSC). The IWRC is preferred as a core where resistance to crushing or heat is required.
7. Lay
There are two different methods of laying up of wire ropes, namely ORDINARY ( REGULAR ) LAY and LANGS LAY. In the ordinary lay rope the wires of the strands are laid in one direction and the strands are laid in the rope in the opposite direction. Ropes laid in this manner are suitable for all general work. In the langs lay rope, the direction of the both the wires in the strands as well as the strands in the rope are in the same direction. Ropes made up of langs lay tend to wear more evenly than ordinary lay rope, owing to the rotational movement of the rope when at work and since the wear is carried over a longer length of wire, the rope does not fatigue. When it becomes worn, langs lay rope are slightly more flexible than ordinary lay rope of similar size and construction and their resistance to bending fatigue is better. They are extensively used for winding and haulage duty, and their usage is limited as compared to Ordinary lay ropes. Hand of lay: This term refers to the direction in which the strands are laid up in the rope, as distinct from the direction of wires. Right hand lay is the usual standard adopted by rope manufacturers and all ropes are supplied with this lay unless otherwise specified. The use of left hand lay is usually confined to ropes used for drilling purposes, to prevent unscrewing of rods, or in connection with right hand lay ropes in on cranes and elevators to counteract the spin. Usually, a Left-hand lay rope is used in combination with a right Hand lay rope.
8. Minimum Breaking Load
If possible, the same should also be furnished, as it aids in checking on the specifications of the offered rope.
9. Preformed or Non Preformed
A rope can be pre-formed or non pre-formed. Usually, a general engineering rope is pre-formed, whereas an elevator rope is Non pre-formed.
10. Specification
Every rope is manufactured in conformance to specific quality conformation standards. The same may be either IS or Indian standards, DIN, BS, JIS, API or any other standard as specified by the customer.
11. Fittings/ End terminations
In certain applications, you may need to attach additional fittings, such as sockets, thimbles, sockets (spelter/ swaged), rings, loops ( plain/ bucket) which can be supplied by UMI as per customers' requirements.
12. Packing
Usually, a steel wire rope can be packed either in wooden or steel Reels or coils. In case of shorter lengths.
13. Area of Application
In addition to the above specification, we usually ask for the area of application of a rope, so that we can ourselves judge whether the specific rope that is being offered is the suitable one or not. It aids as an additional check for us so that we can ensure that only the rope with the best possible combination of properties is reaching you.
14. Lubrication
We usually deduce the type of lubrication from the area of application of the rope, but in case of any particular requirement dependent on your own customised requirement, do specify the same.
15. Tests
If special testing is required from external Testing agencies, e.g. from ABS,Lloyds, the same should be specified while sending the enquiry. Other wise, as a valid proof of the quality Usha Martin product, each and every rope is supplied alongwith a Test Certificate giving all relevant rope details, like tensile grade and braking load.
 
 
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