Flat-Link Mining Chains DIN 22255

Flat-Link Mining Chains DIN 22255

Unlike typical round-link chains, flat-link chains have flattened vertical links, which reduces link height without reducing their strength.

This solution has many advantages:
– The sliding surface of the links increases, while the unit pressure on the pan is reduced
– The wear resistance of the vertical links increases
– The reduced link height makes it easier for the chain to pass through the sprocket teeth, allowing lower pans and lower chain units

Flat-Link Mining Chains DIN 22255 – image 2

DIN 22255 – Dimensions

Chain size mm	d	e	p	Width				Weight
				Round links		Flat links
				a1	b1	a2	b2
22 x 86	22 ± 0,8	24,0	86 ± 0,9	26,0	73	26	60	9,2
24 x 86	24 ± 0,8	30,0	86 ± 0,9	28,0	79	28	64	11,6
26 x 92	22 ± 0,8	30,0	92 ± 0,9	30,1	87	30	75	13,7
30 x 108	30 ± 0,9	34,0	108 ± 1,1	34,1	99	34	87	18,0
34 x 126	34 ± 1,0	38,0	126 ± 1,3	38,1	111	38	99	22,7

DIN 22255 – Mechanical properties

Chain size mm	Grade C		Grade D-3		Elongation at proof test % for both grades	Elongation at break % for both grades
Chain size mm	Proof force kN	Breaking force kN	Proof force kN	Breaking force kN	Elongation at proof test % for both grades	Elongation at break % for both grades
22 x 86	490	610	560	760	1,6	11
24 x 86	543	724	720	900	1,6	11
26 x 92	637	850	750	1060	1,6	11
30 x 108	848	1130	1000	1400	1,6	11
34 x 126	1090	1450	1280	1800	1,6	11