The replacement cycle of the double shaft shredder blades does not have a fixed time, mainly depending on the material being processed, daily working hours, and blade material; Prioritize the wear and tear status, rather than replacing by month.
Reference service life (industry actual working conditions):
Soft materials (plastic, ton bags, wood, household waste, with few impurities)
Ordinary alloy steel blade: 4-6 months; High quality overlay alloy blade: 6-10 months.
Mixed solid waste, cables, household appliance casings, thin iron
Ordinary blade: 2-4 months; High quality wear-resistant blades: 4-7 months.
Hard materials (scrap steel, paint buckets, materials with sand and gravel impurities)
The wear is the fastest, and ordinary blades need to be repaired within 1-2 months. Many times, it is grinding/welding, not directly replacing.
According to production reference: the comprehensive working condition of ordinary blades is about 500-1000 tons of material; High quality welding blades can reach 1200-2000 tons and require processing.

The blades of the dual shaft shredder have these problems and must be replaced directly:
The blade has cracks, chipping, and falling pieces;
After repeated welding, the thickness loss of the blade exceeds 20% of the original size;
Blade deformation and warping;
If there are cracks, it is strictly prohibited to continue using. Blade breakage can damage the box and cause flying debris to injure people.

Key points for extending the lifespan of the double shaft shredder blades:
Try to remove hard impurities such as iron blocks and stones from the feed, and magnetic separation can be used;
Disassemble and inspect the blades and spacers for wear every month; Excessive wear of the spacer will also exacerbate blade wear;
The blade can be diagonally swapped to balance wear and extend overall lifespan.