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ROUND-LINK HIGH-STRENGTH CHAINS FOR MINING EQUIPMENT (STRENGTH CLASS C AND D)

Chains

These chains are produced according toTU U 12.44.10.015-94, DSTU GOST 25996-2002 and correspond to class С and D according to ISO 610 and class 2 according to DIN 22252.

They are applied as traction units of mining combines, ploughs, mining conveyors and other mechanisms where high demands are made on the operational characteristics. High-alloy chrome-nickel-molybdenum steel is used for chains С and D. High-technology chrome-nickel-molybdenum chain steel with special deoxidation and alloying of domestic or foreign production is used for chains CE and DE - Extra. Chains of Extra type are recommended to be used in mining faces where increased demands are made to strength and reliability.

The factory has mastered production of 24-34 mm chains of "Extra"strength class. As compared to chains of class С and D"Extra"chains are peculiar in:

  • 10-15% growth of actual breaking load;
  • 25% increase of failure-terminated reliability;
  • increase of plasticity;
  • 10-12% growth of load on conveyor;
  • less wearing of link surface.
 Chain size, strength class, dxpxa, mm  Proof load, kN  Breaking load, not less than, kN  Elongation at proof load, not more than, %  Total elongation at break, not less than, %  Bend deflection, not less than, mm
18х64х21-С 305 410 1,6 14,0 18
18х64х21-СЭ 330 460 1,6 15,0 18
18х64х21-D 410 510 1,9 12,0 14
18х64х21-DЭ 410 530 1.7 15,0 18
 24х86х28-C 543  720  1,6  14,0 24
 24х86х28-СЭ 543  815  1,6 15,0  24 
24х86х28-D 560  880 1,9 12,0  20 
 24х86х28-DЭ 570  900 1,7 15,0 20
 26х92х30-С 610  850  1,6 14,0  26 
26х92х30-СЭ 610 960 1,6 15,0 26
26х92х30-D 640 1020 1,9 12,0 21
26х92х30-DЭ 670 1060 1,7 15,0 21
30х108х34-С 848  1130  1,6  14,0 30
30х108х34-СЭ 848 1270 1,6 15,0 30
30х108х34-D 880 1380 1,9 12,0 24
 30х108х34-DЭ 890   1400 1,7  15,0  24 

 

Piece length L (number of links) is agreed at the order.

The chains applied on conveyors are fitted by pairs on the special measuring stand and are supplied in bundles pairwise. Nominal sizes and limited deviations of the lengths fitted correspond to TU U 12.44.10.015-94, DSTU GQST25996-2002.

Produced by PJSC VISTEC