Big Brother Cutting Tool Co., Ltd releases a practical guide to help manufacturers select between two widely used turning inserts: triangular (60°) and 80° rhombic (pear-shaped) inserts. Both are double-sided with 6 usable cutting edges, but their design differences make them suited for distinct machining scenarios.
For many workshop operators, the choice between these two inserts often comes down to tip angle and strength. The 80° rhombic insert features a large, robust tip that delivers high impact resistance, making it ideal for roughing operations, facing cuts, and heavy-duty machining. Its wide tip spreads cutting forces evenly, reducing the risk of chipping even under high loads, which means longer tool life and fewer production interruptions.
On the other hand, the triangular insert with a 60° tip angle offers excellent versatility for light cuts and finishing work. While its smaller tip is less suited for heavy roughing due to lower strength and heat dissipation, it excels in precision tasks like fine profiling and finishing passes, delivering smooth, accurate surface finishes.
To help you choose:
Choose the 80° rhombic insert if you need strength and durability for roughing, facing, or interrupted cuts.
Choose the triangular insert if you need precision and versatility for finishing, light cuts, or detailed profiling.
At Big Brother Cutting Tool, we supply both insert types with high-quality carbide substrates and wear-resistant coatings, ensuring consistent performance across carbon steel, stainless steel, and alloy steel machining. Whether you're looking to boost roughing efficiency or improve finishing quality, we have the right insert for your turning operations.
Contact our team today for a free quote and technical support to find the perfect insert for your specific machining needs.
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