Spiral Groove Cone Drill Bit Hexagon Screw Step Drill Bit

This is the New HSS Steel Large Step Cone Drill Titanium Bit Set Hole Cutter, which is made from high quality HSS steel, and with the Titanium coated to reduce friction and heat.

It is very suitable for using to cut holes in a variety of materials including thin steel, brass, wood, plastic, etc.

Specifications: 

• Type: Spiral Groove Cone Drill Bit
• Material: HSS(High Speed Steel)
• Shank: 10mm
• Flute: Spiral
• Size:

1. HSS 4-20mm:(9 Steps) 4mm/6mm/8mm/10mm/12mm/14mm/16mm/18mm/20mm
2. HSS 4-32mm: (15 Steps) 4mm/6mm/8mm/10mm/12mm/14mm/16mm/18mm/20mm/22mm/24mm/26mm/28mm/30mm/32mm

Please Noted：

• Hand drills and bench drills can be used for these steps.
• Water injection is used for cooling when drilling, which can effectively extend the service life of the drill.
• The recommended drilling rate is 250-400 RPM.
• You can use our step drilling machine to drill holes within 5mm.
• Remember, only M35 step drilling is suitable for stainless steel. Never use these HSS 4241 step drills to drill stainless steel!