TTP Hard Drill Bits: 135 degree split point Cobalt drills - an easier way to drilling stainless steel
Drill Bits For Drilling stainless steel
TTP HARD DRILLS are designed to drill through the toughest and hardest of abrasive materials such as stainless steel. They are ideal drill bits for drilling stainless steel including most common types of the austentic stainless steel types 200 - 300 can be easily drilled with the correct drill and technique even using a hand drill.
TTP Hard Drills - Drill Stainless Steel
This video shows the TTP Hard Drill drilling into a martensitic grade of stainless steel - showing TTP COBALT Hard Drills drilling through STAINLESS STEEL 17-4 PH (also known a stainless steel 630) a martensitic precipitation hardening stainless steel, versatile with an outstanding combination of properties.
CHOOSING the best drill bit for drilling stainless steel combined with technique and a coolant enables success.
Jobber Drills, HSS, Carbide ? A split point cobalt drill bit is the best choice for manually drilling - This short video shows a 13mm TTP Hard Drill - Added cobalt and molybdenum 135 Degree Split Point - (Makes entire point of the bit one long cutting edge) quickly drilling through the stainless steel.
Most common mistakes that people make -
TOO HIGH DRILL SPEED
TOO MUCH PRESSURE
= TOO MUCH HEAT GENERATED - makes the steel EVEN harder to drill !
If possible use a punch
Start slow to find the 'chip' keep the drill cutting and not rubbing
Keep it cool !!!!!! APPLY a cooling aid FREQUENTLY - TTP CUT IT is a
The work hardening effect when drilling stainless steel (the chromium in the stainless steel makes the stainless steel harder to drill than carbon steel) is the main cause of problems. Centre punching with conventional conical shaped punches can result in enough localized work hardening to make drill entry difficult. This can make the drill tip deflect or wander, glaze the surface and / or blunt the drill tip and result in drill breakages, particularly where small diameter holes are being drilled. During drilling it is essential to maintain the feed to cut through the work hardened layer generated as the metal is cut.
Drill slowly and allow the bit to do the work. If you apply too much pressure friction will cause your drill bit to redden with heat which in turn will blacken the stainless steel. The same will happen if you engage the drill to its full speed. The trick here is to find a happy medium, that "sweet spot" at which the drill, the bit and the metal cooperate fully.
TTP Hard Drill bits are the best cobalt drill bits for stainless steel, chrome, hardened steel and harder alloys. The TTP Hard Drills 135° split point (self centering) combined with the deeper parabolic flute form (manufactured from Tungsten and Molybdenum for increased Hardness and with Cobalt added to ensure superior heat resistance) ensure that these drill bits are Guaranteed to perform in the most demanding of applications like drilling stainless steel.