Drill bit set YATO YT-39820, 5 pieces, metal drill bits for general use

YATO YT-39820 is a set of five metal drill bits intended for general drilling tasks in workshops and professional environments. The set includes five HSS 4341 high-speed steel bits with diameters 3, 4, 5, 6 and 8 mm and split-point tips ground at 118° to reduce walking and improve centring. Each bit has a defined working length and overall length to suit through-hole and deeper drilling operations with standard drills.

Advantages

These drill bits are manufactured to DIN 1869 dimensions from HSS 4341, providing wear resistance and cutting performance for common metalworking and maintenance tasks. The 118° split-point geometry helps start holes accurately without a pilot and reduces lateral slipping on flat surfaces. The assortment of diameters covers frequent drilling requirements, while the varied working lengths allow use in both shallow and deeper holes with improved reach.

Suitable for

• Drilling holes in mild and medium-hard metals
• Workshop maintenance and repair tasks
• Use with standard hand-held and bench drills
• General-purpose metal fabrication and assembly
• Routine on-site drilling where a compact set is required

Key specifications

• Material: HSS 4341 (high-speed steel)
• Standard: DIN 1869
• Tip geometry: split point, 118°
• Diameters: 3 mm, 4 mm, 5 mm, 6 mm, 8 mm
• Working lengths: 3 mm – 100 mm; 4 mm – 120 mm; 5 mm – 135 mm; 6 mm – 140 mm; 8 mm – 165 mm
• Overall lengths: 3 mm – 150 mm; 4 mm – 175 mm; 5 mm – 195 mm; 6 mm – 205 mm; 8 mm – 240 mm

How to use

Secure the appropriate drill bit in the chuck of a compatible hand-held or bench drill, ensuring correct centring and tight clamping. Select a suitable cutting speed for the material being drilled—lower speeds for harder metals and higher speeds for softer materials—apply steady axial pressure and allow the bit to cut without excessive force. Use cutting fluid or lubricant when drilling metal to reduce heat, extend bit life and improve hole finish. After drilling, clear chips from the flutes and inspect the bit for wear before reuse.

Usage recommendations

For best performance, match drill speed and feed to the material and bit diameter, use cutting fluid for metal drilling, and replace bits showing significant wear or chipping. Store the set in a dry place and protect cutting edges from impacts to maintain accuracy and service life.