HSS Step Drill

Jon Bhandari Tools High-Speed Steel (HSS) Step Drill Bits are multi-diameter, cone-shaped cutting tools designed for incremental drilling, sheet expansion, and edge deburring using a single bit.
Titanium Nitride (TiN) Gold Coating: Formulated to reduce friction and thermal expansion, preventing premature dulling when working on dense thin-gauge metals.
Self-Centering Split-Point Tip: Starts cutting directly on contact to eliminate bit walking or the need for a center punch / pilot hole.
Dual Straight / Spiral Flutes: Evacuates swarf and metal shavings smoothly, preventing binding while maintaining clear visibility of laser-etched depth dimensions.
Anti-Slip Shank Configuration: Built with standard hex or 3-flat shanks to prevent slipping inside drill chucks under high torque loads.

Warranty Coverage: Step drill bits fall under the Consumable / Wear & Tear Tool Accessories category. Like conventional drill bits and saw blades, Jon Bhandari Tools does not offer an extended standard manufacturer warranty against normal wear, dulling, or breakage during operational use.

1. What materials can I drill using Jon Bhandari Step Bits?
They perform best on thin sheet metals (up to 3–4 mm thickness) such as mild steel, aluminum, brass, copper, galvanized sheets, PVC, wood, and acrylics.
2. Can I use this on Stainless Steel (SS)?
While it can cut thin-gauge stainless steel (under 1.5–2 mm), it is not recommended for heavy SS applications. High heat built up on stainless steel will quickly wear down the TiN coating and dull the cutting edges.
3. Why is my step drill bit heating up or wearing out quickly?
High operational RPMs and lack of lubrication are the main causes. Always run step drills at low-to-medium speeds (400–800 RPM) and apply cutting oil or lubricant (like WD-40 or machine oil) while drilling metal.
4. Can I use these with an Impact Driver?
Bits featuring a 1/4-inch hex shank can fit impact drivers, but step bits should be operated under steady rotary drilling rather than heavy percussive impacts to avoid snapping step edges.
5. How do I prevent drilling beyond my target hole size?
Because step increments progress automatically (e.g., 4 mm to 6 mm to 8 mm), step bits lack a depth stop. Mark the target diameter step on the cone using a piece of masking tape or a permanent marker before drilling.