YFTOOL Carbide Drill Bit Set for Hardened & Stainless Steel – 4 Pcs, 135° Point

High-Performance Carbide Drill Bit Set for Tough Materials

Meet the YFTOOL carbide drill bit set, engineered to tackle hardened steel, stainless steel, and hot-working steels with reliable precision. The 4-piece collection covers common hole diameters from 1/16 in to 1/4 in, offering consistent results across delicate tasks and demanding fixtures in both CNC and manual work.

The design emphasizes an accurate start and steadier cuts. The 135° point angle helps prevent wandering when drilling tougher materials, while the obtuse tip geometry reduces cutting forces to support stable cuts and longer tool life.

TiAlSi coating marks an upgrade over traditional finishes by delivering higher surface hardness and improved oxidation resistance. This coating is designed to withstand the heat and abrasion associated with stainless steels and high-hardness steels, helping maintain cutting performance over time.

Crafted from solid carbide with a fine 0.4 micron grain, these bits prioritize rigidity and wear resistance. The result is reduced deflection and steady tolerance control, supporting repeatable holes in challenging metals.

Chip Control, Heat Management, and Precision

• 30° helix angle promotes efficient chip evacuation, helping clear long chips and limit heat buildup.
• 135° tip together with short chips reduces blockage, supporting smoother drilling on hard materials.
• 0.4 micron K30 carbide substrate delivers wear resistance and rigidity for repeated cuts.
• Fine-tuned tolerance of ±0.003 mm aims for tight hole quality in precision tasks.

Practical Uses and What’s in the Box

• Four diameters: 1/16 in, 1/8 in, 3/16 in, and 1/4 in, ideal for delicate fits and prototyping.
• Solid carbide construction with a durable coating for high hardness materials and repeated use.
• Designed for reliability in CNC setups and hand-held drilling where stability matters.

Note: Actual results depend on your machine, workpiece, and technique. The set suggests potential benefits such as easier starts, consistent holes, and longer tool life under demanding materials, without guaranteeing outcomes for every task.