Drilling BMW Flywheel Ring Gear | Cobalt Drill Bit + CUT-IT Paste Demo
BMW Dual Mass Flywheel Drill Bit Demo
Automotive flywheels and gears are made from hardened steel — materials specifically designed to resist wear, heat, and mechanical stress. Drilling into these parts is notoriously difficult, with standard HSS drill bits usually failing within seconds. This 1-minute demo shows how a TTP HARD cobalt drill bit, combined with CUT-IT cutting paste, drills straight into the ring gear of a BMW dual mass flywheel. With proper lubrication, the bit maintains sharpness and cuts cleanly through one of the toughest components in automotive engineering.
Key Highlights from the Video
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TTP HARD cobalt drill bit drilling BMW dual mass flywheel ring gear
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Long, continuous metal swarf shows efficient cutting
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More CUT-IT applied after 20 seconds for cooling & lubrication
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Drill speed increased after lubrication — smooth, clean finish
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Demonstrates durability of cobalt bits on hardened automotive steel
Buy The Tools Used In This Demo
Information on drilling BMW Flywheel with TTP HARD drill bits
Flywheels, ring gears, and drive components are some of the hardest automotive parts to drill due to their heat-treated, hardened steel construction. These components are engineered for strength and durability, which makes them resistant to cutting. Attempting to drill them with standard HSS drill bits often results in squealing, rapid tip wear, or outright breakage.
This video demonstrates the difference when using TTP HARD cobalt drill bits. Manufactured from M35 grade steel with 5% cobalt, these drill bits maintain hardness and cutting efficiency under heat. In the demo, the bit is first run at moderate speed, producing long swarf — proof of sharp cutting. After 20 seconds, CUT-IT metal cutting paste is reapplied to reduce friction and keep the bit cool. With proper lubrication, the drill speed can then be increased and the hole is completed effortlessly.
Using the right tools ensures precise drilling even in hardened steel automotive parts. The combination of cobalt drill bits and CUT-IT paste allows mechanics, repair workshops, and DIY enthusiasts to perform demanding tasks on flywheels, gears, and other drive components without damaging their tools.
To achieve similar results:
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Start drilling at a slower speed to reduce heat.
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Apply CUT-IT paste generously and reapply during the cut.
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Watch for long, continuous swarf — a sign of efficient drilling.
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Increase drill speed only once lubrication is in place.
This approach maximizes tool life and ensures clean drilling, even in hardened automotive steels.