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Round Link Chains

Round Link Chains

 

THIELE produces round link chains for the mining industry in rated sizes of 14 up to currently 42 mm according to DIN 22252.....but we are also able to manufacture larger sizes.


We produce round link chains for following requirements:


» THD - THIELE Heavy Duty
Heavy duty round steel chain according to DIN 22252

» TSC - THIELE Super Crown (TWN 0100)
special crown wear resistant; less wear in the crown areas

» TSD - THIELE Super Duty (TWN 0024/1)
for highest working conditions in all conveyors

» TRQ - THIELE Rock Quality (TWN 0108)
for highest wear conditions in lower speed conveyors / crusher

» TIP - THIELE Improved Performance
a high tensile strength

The rated sizes of 22 mm and higher have been developed by us.


Our development of calibration for long chain strands at the beginning of the seventies made the use of the general twin inboard chains possible. For even higher precision we use modern, computer supported calibration processes.



THD Round Link Chains DIN 22252


THIELE round-link chains can be used on both face conveyors and stage loaders and are also suitable as traction elements for coal ploughs. To ensure that its products can meet the tough demands of today’s mining industry THIELE has developed its own chain steels based on many years of manufacturing know-how.


Each production stage is accompanied by careful and thorough quality control tests. THIELE chains are recognised all over the world for their performance and durability.


This is why THD round-link steel chains are hardened and tempered to a strength of 345 – 375 HB10 (which applies uniformly over the entire link). For chains intended for face conveyors this strength level represents the optimum in terms of impact resistance (notch impact strength) and wear resistance (hardness).


Mechanical Properties

ChainsizeDiameterPitchInside WidthOutside WidthLength at nWeight
d x t [mm]dtb1 min.b2 max.5 x t[kg/m]
  14 x 50     14    ± 0,4    50,0    ± 0,5    17    48    250,0    ± 1,0    4,0  
  18 x 64    18    ± 0,5    64,0    ± 0,6    21    60    320,0    ± 1,0    6,6  
  19 x 64,5    19    ± 0,6    64,5    ± 0,6    22    63    322,5    ± 1,0    7,6  
  22 x 86    22    ± 0,7    86,0    ± 0,9    26    73    430,0    ± 1,0    9,5  
  24 x 86    24    ± 0,7    86,0    ± 0,9    28    79    430,0    ± 1,0    11,6  
  24 x 87,5    24    ± 0,7    87,5    ± 0,9    28    79    437,5    ± 1,0    11,5  
  26 x 92    26    ± 0,8    92,0    ± 0,9    30    85    460,0    ± 1,0    13,7  
  30 x 108    30    ± 0,9    108,0    ± 1,1    34    97    540,0    ± 1,2    18,0  
  34 x 126    34    ± 1,0    126,0    ± 1,3    38    109    630,0    ± 1,3    22,7  
  38 x 137    38    ± 1,1    137,0    ± 1,4    42    121    685,0    ± 1,4    29,0  
  42 x 137    42    ± 1,1    137,0    ± 1,4    48    139    685,0    ± 1,4    36,6  
the above values apply to chains in "natural black" condition (nsw)

Mechanical Properties THD

ChainsizeArticle No.Test ForceElongation
under test
force
Breaking
Force
Elongation
at fracture
Minimum
Deflection
d x t [mm]kN% max.kN min.%[mm]
  14 x 50     F13101    185    1,6    246    14    14  
  18 x 64    F13206    305    1,6    407    14    18  
  19 x 64,5    F13311    340    1,6    454    14    19  
  22 x 86    F13401    456    1,6    608    14    22  
  24 x 86    F13482    543    1,6    724    14    24  
  26 x 92    F13513    637    1,6    850    14    26  
  30 x 108    F13653    848    1,6    1.130    14    30  
  34 x 126    F13813    1.090    1,6    1.450    14    34  
  38 x 137    F13877    1.360    1,6    1.820    14    38  
  42 x 137    F15093    1.660    1,6    2.220    14    42  
the above values apply to chains in "natural black" condition (nsw)

TSC Round Link Chains (TWN 0100)


THIELE developed the TSC series of Round Link Chains with wear-resistant crowns (THIELE Super Crown) in order to reduce link wear on plough chains and increase chain operating life.


As frictional heat in the fast running plough chains (which travel at over 3.0 m/s) leads to hardening of the legs and to dangerous crack formation the material strength of the legs is deliberately reduced by secondary heat treatment – thereby increasing the crack arrest capacity.


THIELE TSC chains are widely used on chain scraper conveyors because of the increased hardness of their joints. This extra hardness rating inevitably means that the chains are more susceptible to stress, corrosion, and cracking, so TSC Chains are not recommended for corrosive environments – especially when fitted to face conveyors.


Mechanical Properties

ChainsizeDiameterPitchInside WidthOutside WidthLength at nWeight
d x t [mm]dtb1 min.b2 max.5 x t[kg/m]
  14 x 50     14    ± 0,4    50,0    ± 0,5    17    48    250,0    ± 1,0    4,0  
  18 x 64    18    ± 0,5    64,0    ± 0,6    21    60    320,0    ± 1,0    6,6  
  19 x 64,5    19    ± 0,6    64,5    ± 0,6    22    63    322,5    ± 1,0    7,6  
  22 x 86    22    ± 0,7    86,0    ± 0,9    26    73    430,0    ± 1,0    9,5  
  24 x 86    24    ± 0,7    86,0    ± 0,9    28    79    430,0    ± 1,0    11,6  
  24 x 87,5    24    ± 0,7    87,5    ± 0,9    28    79    437,5    ± 1,0    11,5  
  26 x 92    26    ± 0,8    92,0    ± 0,9    30    85    460,0    ± 1,0    13,7  
  30 x 108    30    ± 0,9    108,0    ± 1,1    34    97    540,0    ± 1,2    18,0  
  34 x 126    34    ± 1,0    126,0    ± 1,3    38    109    630,0    ± 1,3    22,7  
  38 x 137    38    ± 1,1    137,0    ± 1,4    42    121    685,0    ± 1,4    29,0  
  42 x 137    42    ± 1,1    137,0    ± 1,4    48    139    685,0    ± 1,4    36,6  
the above values apply to chains in "natural black" condition (nsw)

Mechanical Properties TSC

ChainsizeArticle No.Test ForceElongation
under test
force
Breaking
Force
Elongation
at fracture
Minimum
Deflection
d x t [mm]kN% max.kN min.%[mm]
  22 x 86    F13394    456    1,4    670    18    22  
  26 x 92    F13506    637    1,4    940    18    26  
  30 x 108    F13646    848    1,4    1.250    18    30  
  34 x 126    F13872    1.090    1,4    1.610    18    34  
  38 x 137    F15090    1.360    1,4    2.010    18    38  
  42 x 137    F15094    1.660    1,6    2.450    14    42  
the above values apply to chains in "natural black" condition (nsw)

TSD Round Link Chains (TWN 0024/1)


Like TRQ Chains, THIELE TSD Round Link Chains (THIELE Super Duty) were developed in order to achieve the greatest possible wear resistance when used on chain scraper conveyors and with a higher breaking force. The material strength of the legs is deliberately reduced by precise heat treatment, which increases the crack arrest capacity, in order to prevent cracking caused by the friction martensite as a result of chain speeds of > 0.5 m/s. This makes TSD Chains ideally suited for use on stage loaders (BSL).


The extreme crown hardness of TSD Chains results in a very high wear resistance and a higher breaking force too. The latter is however an unintentional side effect. As the increased hardness also means a reduction in toughness and a greater sensitivity to stress corrosion cracking TSD Chains are not recommended for use on face conveyors operating in a corrosive environment.


Mechanical Properties

ChainsizeDiameterPitchInside WidthOutside WidthLength at nWeight
d x t [mm]dtb1 min.b2 max.5 x t[kg/m]
  14 x 50     14    ± 0,4    50,0    ± 0,5    17    48    250,0    ± 1,0    4,0  
  18 x 64    18    ± 0,5    64,0    ± 0,6    21    60    320,0    ± 1,0    6,6  
  19 x 64,5    19    ± 0,6    64,5    ± 0,6    22    63    322,5    ± 1,0    7,6  
  22 x 86    22    ± 0,7    86,0    ± 0,9    26    73    430,0    ± 1,0    9,5  
  24 x 86    24    ± 0,7    86,0    ± 0,9    28    79    430,0    ± 1,0    11,6  
  24 x 87,5    24    ± 0,7    87,5    ± 0,9    28    79    437,5    ± 1,0    11,5  
  26 x 92    26    ± 0,8    92,0    ± 0,9    30    85    460,0    ± 1,0    13,7  
  30 x 108    30    ± 0,9    108,0    ± 1,1    34    97    540,0    ± 1,2    18,0  
  34 x 126    34    ± 1,0    126,0    ± 1,3    38    109    630,0    ± 1,3    22,7  
  38 x 137    38    ± 1,1    137,0    ± 1,4    42    121    685,0    ± 1,4    29,0  
  42 x 137    42    ± 1,1    137,0    ± 1,4    48    139    685,0    ± 1,4    36,6  
the above values apply to chains in "natural black" condition (nsw)

Mechanical Properties TSD

ChainsizeArticle No.Test ForceElongation
under test
force
Breaking
Force
Elongation
at fracture
Minimum
Deflection
d x t [mm]kN% max.kN min.%[mm]
  22 x 86    F14009    530    1,6    750    16    18  
  24 x 86     F13454    630    1,6    900    16    19  
  26 x 92    F14005    740    1,6    1.050    16    21  
  30 x 108    F14045    990    1,6    1.400    16    24  
  34 x 126    F14077    1.270    1,6    1.800    16    27  
  38 x 137    F14085    1.590    1,6    2.250    16    30  
the above values apply to chains in "natural black" condition (nsw)

TRQ Round Link Chains (TWN 0108)


THIELE Rock Quality Chains (TRQ) were specially developed for the conveying of abrasive materials in stone drifts and roadway drivages. Careful tempering ensures hardness levels of 424 - 453 HB over the entire cross-section of the material and a uniform surface hardness at any point on the chain link.


The TRQ Chain also exhibits a high tensile strength with a fracture stress of 1000 N/mm². The combination of tensile strength and hardness opens up opportunities for use in difficult conveying situations where high tensile loads would rule out the use of surface hardened chains.


TRQ Chains can be operated up to a maximum speed of 0.5 m/s, as the frictional heat generated at higher chain speeds would result in hardening of the shanks and lead to dangerous crack formation.


Mechanical Properties

ChainsizeDiameterPitchInside WidthOutside WidthLength at nWeight
d x t [mm]dtb1 min.b2 max.5 x t[kg/m]
  14 x 50     14    ± 0,4    50,0    ± 0,5    17    48    250,0    ± 1,0    4,0  
  18 x 64    18    ± 0,5    64,0    ± 0,6    21    60    320,0    ± 1,0    6,6  
  19 x 64,5    19    ± 0,6    64,5    ± 0,6    22    63    322,5    ± 1,0    7,6  
  22 x 86    22    ± 0,7    86,0    ± 0,9    26    73    430,0    ± 1,0    9,5  
  24 x 86    24    ± 0,7    86,0    ± 0,9    28    79    430,0    ± 1,0    11,6  
  24 x 87,5    24    ± 0,7    87,5    ± 0,9    28    79    437,5    ± 1,0    11,5  
  26 x 92    26    ± 0,8    92,0    ± 0,9    30    85    460,0    ± 1,0    13,7  
  30 x 108    30    ± 0,9    108,0    ± 1,1    34    97    540,0    ± 1,2    18,0  
  34 x 126    34    ± 1,0    126,0    ± 1,3    38    109    630,0    ± 1,3    22,7  
  38 x 137    38    ± 1,1    137,0    ± 1,4    42    121    685,0    ± 1,4    29,0  
  42 x 137    42    ± 1,1    137,0    ± 1,4    48    139    685,0    ± 1,4    36,6  
the above values apply to chains in "natural black" condition (nsw)

Mechanical Properties TRQ

ChainsizeArticle No.Test ForceElongation
under test
force
Breaking
Force
Elongation
at fracture
Minimum
Deflection
d x t [mm]kN% max.kN min.%[mm]
  18 x 64    F13209    320    1,6    510    12    18  
  19 x 64,5    F13314    360    1,6    570    12    19  
  22 x 86    F13405    480    1,6    760    12    22  
  26 x 92    F13518    670    1,6    1.060    12    26  
  30 x 108    F13660    890    1,6    1.410    12    30  
  34 x 126    F13805    1.140    1,6    1.820    12    34  
  38 x 137    F15091    1.430    1,6    2.270    12    38  
the above values apply to chains in "natural black" condition (nsw)

TIP Round Link Chains


THIELE TIP Round Link Chains have been developed for use on high-performance coal faces. By employing special alloyed steel the main operating parameters of these mining chains have been significantly improved without any loss in impact strength and deformability.


As the use of additional alloy constituents means higher material costs the added benefits of TIP Chains only begin to be felt on high-performance faces where the extra expenditure is soon offset by the higher face output and the higher working capabilities of the chains.


Mechanical Properties

ChainsizeDiameterPitchInside WidthOutside WidthLength at nWeight
d x t [mm]dtb1 min.b2 max.5 x t[kg/m]
  14 x 50     14    ± 0,4    50,0    ± 0,5    17    48    250,0    ± 1,0    4,0  
  18 x 64    18    ± 0,5    64,0    ± 0,6    21    60    320,0    ± 1,0    6,6  
  19 x 64,5    19    ± 0,6    64,5    ± 0,6    22    63    322,5    ± 1,0    7,6  
  22 x 86    22    ± 0,7    86,0    ± 0,9    26    73    430,0    ± 1,0    9,5  
  24 x 86    24    ± 0,7    86,0    ± 0,9    28    79    430,0    ± 1,0    11,6  
  24 x 87,5    24    ± 0,7    87,5    ± 0,9    28    79    437,5    ± 1,0    11,5  
  26 x 92    26    ± 0,8    92,0    ± 0,9    30    85    460,0    ± 1,0    13,7  
  30 x 108    30    ± 0,9    108,0    ± 1,1    34    97    540,0    ± 1,2    18,0  
  34 x 126    34    ± 1,0    126,0    ± 1,3    38    109    630,0    ± 1,3    22,7  
  38 x 137    38    ± 1,1    137,0    ± 1,4    42    121    685,0    ± 1,4    29,0  
  42 x 137    42    ± 1,1    137,0    ± 1,4    48    139    685,0    ± 1,4    36,6  
the above values apply to chains in "natural black" condition (nsw)

Mechanical Properties TIP

ChainsizeArticle No.Test ForceElongation
under test
force
Breaking
Force
Elongation
at fracture
Minimum
Deflection
d x t [mm]kN% max.kN min.%[mm]
  26 x 92    F13513TIP    670    1,6    890    16    26  
  30 x 108    F13653TIP    890    1,6    1.190    16    30  
  34 x 126    F13813TIP    1.145    1,6    1.525    16    34  
  38 x 137    F13877TIP    1.430    1,6    1.910    16    38  
the above values apply to chains in "natural black" condition (nsw)
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