■ Mining Mill Bolts Specification:
◆ Nominal Diameter: M24-M72;
◆ Bolts Length: 120-1600mm;
◆ Pitch：1.5-7mm;
◆ Bolts Type: Grinding mill liner bolts,Crusher bolts,Gear connecting bolt, Cylinder connecting bolt, Foundation bolt.
■ Mining Mill Bolts Strength Grade:
◆ Grade 8.8 material is 45 × steel / 40Cr, requiring heat treatment.
◆ 40Cr / 35CrMo for Grade 10.9 material needs heat treatment.
■ Manufacturing Process: Forging, Heat Treatment, Thread Rolling, Oxidation and Blackening.
■ Bolt Heat Treatment Process: Quenching and Tempering.
■ Performance Mill Bolts Grade 8.8 Bolts/Grade 10.9 Bolts Meaning:
◆ The nominal tensile strength of bolt material reaches 800MPa;
◆ The yield strength ratio of bolt material is 0.8;
◆ The nominal yield strength of bolt material is 400 × 0.8 = 640MPa.
◆ The nominal tensile strength of bolt material reaches 1000MPa;
◆ The yield strength ratio of bolt material is 0.9;
◆ The nominal yield strength of bolt material is 1000 × 0.9 = 900MPa.

■ Mill Bolt Packing

Anti-rust treatment and use wire mesh cover to protect the screws. Custom wooden box packaging and shipping.