Service life of the tyre-protection chains

Kind of Rock	LOM 11.4.H service-life (hours)	LOM 14.4.H service-life (hours)	LOM 16.4.H service-life (hours)	LOM 18.4.H service-life (hours)
Eruptive Rocks
granite, quartz, andesite	1.530 -3.060	2.100 -4.200	2.700 -5.400	3.300 -6.200
basalt, diabase	2.500 -3.825	3.500 -5.300	4.500 -6.750	5.200 -7.800
Metamorphosic Rocks
marble	2.975 -5.100	4.000 -7.000	5.250 -9.000	6.100 -10.300
quartz-rock	850 -2.210	1.200 -3.000	1.500 -3.900	1.900 -4.500
gneiss	1.530 -2.210	2.100 -3.000	2.700 -3.900	3.300 -4.500
Sediments
sandstone	1.020 -2.380	1.400 -3.200	1.800 -4.200	2.000 -4.800
limestone	4.250 -12.750	6.000 -17.000	7.500 -22.500	13.000 -24.000
slate	1.020 -1.530	1.400 -2.100	1.800 -2.700	2.000 -3.100
Others
slag	1.870 -3.400	3.000 -5.500	3.300 -6.000	3.800 -6.900
iron ore	2.125 -3.400	3.000 -4.700	3.750 -6.000	4.400 -6.900
manganase ore	2.125 -2.975	3.000 -4.000	3.750 -5.250	4.400 -6.100
copper ore	1.700 -3.400	2.300 -4.700	3.000 -6.000	3.400 -6.900
scrap iron	2.125 -3.400	3.000 -4.700	3.750 -6.000	4.400 -6.900

The anticipated service life of the tyre protection chains is affected by the rock conditions (hardness, particle size, sharp edges). The actual service life is greatly influenced by the overall operating conditions, type of operation and also by the chain maintenance. The chart below gives the approximate service lifespan on different types of rock.

Service life of the tyre-protection chains

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