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The difference between double-edged rolling cutters and single edged rolling cutters
Category: Industry News
Time: 2026-04-30
Summary: Single blade rolling cutter: With only one blade edge, it has a simple structure and low manufacturing and maintenance costs.
Number and structure of blades
Single blade rolling cutter: With only one blade edge, it has a simple structure and low manufacturing and maintenance costs.
Double edged rolling cutter: It has two blade edges, a more complex structure, occupies a larger space but is subjected to more uniform force.
Applicable rock strength
Single blade rolling cutter: suitable for medium hard to hard rocks (usually rocks with uniaxial compressive strength>30 MPa), efficiently breaking rocks by compression.
Double edged rolling cutter: commonly used for soft or medium soft rocks (rock strength generally<30 MPa), balancing rock breaking efficiency and disc space utilization.
Rock breaking mechanism and wear characteristics
Single blade rolling cutter: The rock breaking trajectory is clear, which is conducive to forming a "sequential rock breaking" (the front blade creates a crack free surface for the rear blade), with uniform wear and stable service life.
Double edged rolling cutter: Due to the simultaneous action of both edges, it is easy to cause uneven wear, damage the sequential rock breaking effect, and increase the risk of tool waste; But in areas with limited space (such as the center of the cutterhead), it can save layout space.
Typical application scenarios
Single blade rolling cutter: widely used in the main rock breaking area (such as the front and edge of the cutter head), especially as the main cutting tool in hard rock or composite formations.
Double edged rolling cutter: commonly found in the center area of the cutter head, used to save space or increase the cutting edge density per unit length in soft rock sections.
Economy and Maintenance
Single blade rolling cutter: low cost, easy grinding, and convenient replacement.
Double edged rolling cutters: high cost, strict grinding process requirements (need to grind the main and auxiliary blades separately), but the rock breaking efficiency per unit area may be higher
Keywords: The difference between double-edged rolling cutters and single edged rolling cutters
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