Drill bit Smart HSS 20 mm for metal, reamed shank (model 14-200)

Smart HSS drill bit 20 mm with a reamed (undercut) shank is a high-speed steel cutting tool engineered for drilling metal. The 20 mm diameter and HSS material provide a balance of toughness and hardness for cutting through mild steel and other ferrous materials. The reamed shank ensures a more secure fit in chucks that require a slightly reduced shank diameter for stable clamping, making the bit suitable for use in both hand drills and drill presses.

Advantages

The HSS construction delivers wear resistance and heat tolerance during continuous drilling operations. The 20 mm diameter gives a larger hole size for applications that require substantial bore diameters without resorting to step drilling. The reamed shank improves concentricity and reduces slippage in chucks that accept undercut shanks, contributing to greater dimensional accuracy. The bit’s geometry is designed to evacuate chips efficiently when cutting metal, reducing the risk of clogging and heat buildup.

Suitable for

• Drilling mild steel plates and structural steel components
• Workshop and maintenance metalworking tasks
• Use in hand-held electric drills and bench drill presses
• Creating clearance holes for bolts and fasteners in metal assemblies

Key specifications

• Material: high-speed steel (HSS)
• Diameter: 20 mm
• Shank type: reamed (undercut) shank for improved chuck fit
• Intended material: ferrous metals including mild steel
• Typical applications: through-holes and clearance holes in metalwork

How to use

Select an appropriate drilling speed for HSS and the thickness of the metal being drilled, using lower speeds for harder or thicker material to avoid overheating. Secure the workpiece and fit the reamed shank into a compatible chuck, ensuring the bit is held concentrically. Use cutting fluid or coolant when drilling steel to extend tool life and improve chip evacuation. Apply steady, moderate feed pressure and withdraw periodically on deep holes to clear chips.

Usage recommendations

Inspect the chuck and the reamed shank for burrs before fitting to ensure a stable grip. Match drilling speed and cutting fluid to the workpiece material: lower RPMs and adequate lubrication for hardened or thick steel, higher RPMs for thinner material. Replace the bit when wear affects cutting performance or hole tolerance.