RUKO porraspora HSS TiN 7/8 inch - 1 3/8 inch (8 porrasta)

Step drill bit made of high-speed steel with titanium nitride coating for drilling, deburring, reaming, and chamfering in sheet metal and thin materials. The TiN coating reduces friction and increases wear resistance for longer tool life.

Advantages

Eight cutting steps from 7/8" to 1 3/8" allow drilling multiple hole sizes with one tool. The 3-flat shank prevents slipping in the drill chuck. A 118° point angle provides accurate centering and smooth cutting.

Suitable for

• Steel up to 900 N/mm²
• Non-ferrous metals
• Plastics
• Sheet metal

Key specifications

• Drill bit type: Step drill bit
• Material: HSS
• Coating: TiN
• Diameter range: 7/8" - 1 3/8" (22.2 mm - 34.9 mm)
• Number of steps: 8
• Shank: 3-flat, 1/2" (12.7 mm)
• Total length: 105 mm
• Cutting length: 70 mm
• Point angle: 118°
• Max material thickness: 4 mm
• Standard: DIN 1412 C

Recommendations

Use cutting fluid or coolant for extended tool life, especially when drilling steel.