STEEL WIRE ROPE
[EIRI/EDPR/5357] J.C.: 1581
INTRODUCTION
A steel wire rope consist of a central core around which are wound several helically or symmetrically twisted strands with a uniform pitch and direction. Each strand consists of a number of steel wires similarly twisted in one or more layers, around a central core. The central core may be made of hemp, wire, plastics or any other suitable fibre.
The manner in which each wire is twisted in a strand and each strand around the central core is termed the 'lay' of the rope. It may be clockwire or anticlockwire. If the lay of the wires in the strands and that of the strands in the rope are in the same direction, the rope is called a lang lay rope; if the lay of the wires in the strands and the lay of the strands in the rope are in the opposite direction then the rope is termed a regular lay rope. Regular lay ropes, because of their greater inherent stability, are in wider use than lang lay ropoes. The latter, however, possess greater resistance to abrasion.
Numerous type of wire ropes can be obtained by (i) changing the number and arrangement of wires in each strand, (ii) varying the number of strands in the finished rope, (iii) making rope either with fibre cores or with independent wire rope core and also by closing the ropes so that they are lang lay or regular lay and (iv) producing wire ropes in several grades of steel and in sizes from 0.16 cm (1/16 in) to 10 cm (4 in) in diameter.
COST ESTIMATION
Plant Capacity 1 MT/Day
Land & Building (350 sq.mt.) Rs. 30.50 Lac
Plant & Machinery Rs. 4.60 Lac
Working Capital for 1 Month Rs. 9.92 Lac
Total Capital Investment Rs. 47.88 Lac
Rate of Return 9%
Break Even Point 84%
CONTENTS
INTRODUCTION
USES & APPLICATION
MARKET SURVEY
WHAT IS A WIRE ROPE
RAW MATERIALS
UNGALVANIZED (BRIGHT) STEEL WIRE
DRAWN GALVANIZED STEEL WIRE
STAINLESS STEEL WIRE
TENSILE STRENGTHS OF STEEL WIRE
IN THE U.S.A THE VARIOUS GRADES ARE DESIGNATED AS FOLLWS:
MANUFACTURING STRANDARDS
METHOD OF MEASURING DIAMETER
SAFETY FACTOR OF WIRE ROPE
WIRE ROPE
PRESENT MANUFACTURERS OF STEEL WIRE ROPE
DESIGNATION AND CLASSIFICATION
B CLASSIFICATION
ROUND STRAND ROPES
FLATTENED STRAND ROPES
MULTI-STRAND ROPES
PREORMED ROPES
PROPERTIES
BREAKING STRENGTH OF WIRE ROPES
STANDARD 6 BY 7 GALVANIZED IRON RIGGING AND GUY ROPE
STANDARD 8 BY 19 WIRE ROPE *
STANDARD 6 BY 37 WIRE ROPE *
MANUFACTURING PROCESS
PROCESS FLOW DIAGRAM
PLANT AND MACHINERY SUPPLIERS
SHEARING MACHINE
PICKLING LINE
RAW MATERIAL SUPPLIERS
STEEL WIRE
PICKLING CHEMICALS
APPENDIX – A:
01. PLANT ECONOMICS
02. LAND & BUILDING
03. PLANT AND MACHINERY
04. OTHER FIXED ASSESTS
05. FIXED CAPITAL
06. RAW MATERIAL
07. SALARY AND WAGES
08. UTILITIES AND OVERHEADS
09. TOTAL WORKING CAPITAL
10. TOTAL CAPITAL INVESTMENT
11. COST OF PRODUCTION
12. TURN OVER/ANNUM
13. BREAK EVEN POINT
14. RESOURCES FOR FINANCE
15. INSTALMENT PAYABLE IN 5 YEARS
16. DEPRECIATION CHART FOR 5 YEARS
17. PROFIT ANALYSIS FOR 5 YEARS
18. PROJECTED BALANCE SHEET FOR (5 YEARS)