Metal drill bits Bosch HSS-G 12.5 mm, set of 5, working length 101 mm

Set of five Bosch HSS-G metal drill bits with a 12.5 mm diameter and a 101 mm working length designed for drilling steel and other metals. Manufactured from high-speed steel, these bits deliver wear resistance and consistent cutting performance. The straight-fluted HSS-G geometry is suitable for general metalworking tasks in workshops and construction settings and is compatible with standard drill chucks for use in both handheld and bench drills.

Advantages

High-speed steel construction ensures good hardness and heat resistance during continuous drilling, reducing premature wear. The 12.5 mm diameter and 101 mm working length provide reach and stability when drilling medium-thickness metal sheets and structural parts. Straight-flute HSS-G design offers reliable chip evacuation for common metal drilling operations and straightforward sharpening if required. Compatibility with standard chucks makes the set usable across a wide range of portable and stationary drilling machines.

Suitable for

• Drilling holes in mild and alloy steels
• Workshop fabrication and metalworking tasks
• Maintenance, repair and installation of metal components
• Use with handheld drills and drill presses

Key specifications

• Material: High-speed steel (HSS-G)
• Diameter: 12.5 mm
• Working length: 101 mm
• Set contents: 5 drill bits of identical size
• Flute type: Straight flute for metal drilling

How to use

Select the appropriate drill bit from the set and secure it firmly in the drill chuck. Mark the drilling point on the metal surface and, if necessary, create a small center punch indentation to prevent walking. Use a cutting lubricant or coolant when drilling thicker or harder steels to reduce heat and extend bit life. Drill at a moderate speed appropriate for HSS bits and the metal type, applying steady pressure and retracting periodically to clear chips.

Recommendations

For best results, start with lower RPM on thicker or harder metals and increase speed for thinner materials. Apply cutting fluid for prolonged tool life, clamp workpieces securely, and wear appropriate eye and hand protection during operation.