Drill Bit Set GEKO G39990, carbide coated, 6 pieces, sizes 22–73 mm

The GEKO G39990 drill bit set contains six carbide-coated bits with diameters from 22 mm to 73 mm. Designed for drilling larger-diameter holes, these bits are intended for use with materials compatible with carbide tips. The carbide coating increases wear resistance and extends bit life compared with uncoated options, making the set suitable for workshop, installation and renovation tasks where precise large holes are required.

Advantages

The carbide coating on each bit improves hardness and resistance to abrasion, reducing the rate of wear during repeated drilling. The set covers a wide range of large diameters (22–73 mm) so users can select the appropriate size for different hole requirements without switching between many individual bits. The six-piece configuration simplifies storage and transport for on-site work.

Suitable for

• Cutting large-diameter holes in materials compatible with carbide tips
• Workshop and professional installation tasks
• Renovation work requiring precise hole sizes
• Use with compatible drill holders and machines for larger bits

Key specifications

• Number of pieces: 6
• Tip/coating: carbide-coated
• Diameter range: 22 mm, 26 mm, 32 mm, 38 mm, 50 mm, 73 mm
• Intended use: drilling larger diameter holes
• Suitable environments: workshop, installation, renovation

How to use

Select the bit with the required diameter, secure it in a drill or compatible arbor according to the tool manufacturer's instructions, and verify that the drill and bit are suitable for the workpiece material. Use appropriate feed rate and pressure to avoid overheating and to maintain bit life; when drilling larger holes, steady guidance and correct pilot holes (if required) improve precision. Follow safety precautions including eye protection and secure clamping of the workpiece.

Usage recommendations

For best results, match the bit size to the hole needed, ensure the drill and arbor can safely handle the specified diameters, and work at moderate speed with adequate cooling or intermittent drilling to reduce heat build-up and preserve the carbide coating.