... .Steel castings 2.material carbon steel 3. Class NK Output shaftEfficiency: Annual output of more than 10,000 tons of steel-castingMain ... working.(5) Gear, Bull Gear, axial seat, big shaft, block, module etc.(6) Fire grate car, carrier wheel, driving chain, chain ... declared NK,DNV,BV,ABS,CCS,Germany classification society attestation. Output shaft