Successful core drilling
Frage:
Question 1 => Can I use a magnetic core drill on stainless steel?
Question 2 => Can I use a magnetic core drill on aluminum?
Question 3 => Can I use a magnetic core drill on checker plate?
Question 4 => Can the HM ULTRA SPEED core drill on Inconel 718?
Question 5 => Can the HM ULTRA SPEED core drill on Hastelloy C22?
Question 6 => I need to drill through multiple layers of material. Can I do this in one pass?
Antwort:
To Question 1
Magnetic core drilling machines generally cannot be used directly on stainless steel, as stainless steel has no magnetic properties. This prevents the machine's magnetic base from adhering, making safe work impossible. One solution is the use of a vacuum plate in combination with a vacuum pump. The vacuum plate is securely attached to the stainless steel workpiece using negative pressure. The magnetic core drilling machine can then be attached to the vacuum plate – this time, the magnet adheres to the plate's ferromagnetic surface. This allows safe and precise drilling even on non-magnetic materials such as stainless steel.
To Question 2
Magnetic core drilling machines generally cannot be used directly on aluminum because aluminum has no magnetic properties. This prevents the machine's magnetic base from adhering, making safe work impossible. One solution is the use of a vacuum plate in combination with a vacuum pump. The vacuum plate is securely fixed to the aluminum workpiece using negative pressure. The magnetic core drilling machine can then be attached to the vacuum plate – this time, the magnet adheres to the plate's ferromagnetic surface. This allows safe and precise drilling even on non-magnetic materials such as aluminum.
To Question 3
Magnetic core drilling machines generally cannot be used directly on checkered plate. The uneven surface prevents the magnet from adhering sufficiently. One solution is the use of a vacuum plate in combination with a vacuum pump. The vacuum plate is securely fixed to the corrugated surface using a foam rubber lip. The magnetic core drilling machine can then be mounted on the vacuum plate – this time the magnet adheres to the plate's ferromagnetic surface. This allows even grooved material to be drilled safely and precisely.
to Question 4
Inconel 718 is a high-strength nickel-chromium alloy characterized by its exceptional toughness and heat resistance. However, these properties also make it extremely difficult to machine. A key advantage when machining this material is the use of TiAlSiN-coated core drills (HM ULTRA SPEED). This coating significantly reduces friction between the tool and the workpiece, thereby reducing heat transfer to the cutting edge and the material. This is particularly important because high-alloy nickel-chromium alloys such as Inconel 718 are prone to work hardening if machined improperly – a process in which the material hardens through plastic deformation, making it even more difficult to machine. To counteract this effect and increase tool life, effective and continuous cooling throughout the entire machining process is essential.
To Question 5
Drilling Hastelloy C22 with a HM ULTRA SPEED core drill is generally possible, but comes with some important limitations and requirements. Hastelloy C22 is a highly corrosion-resistant nickel-chromium-molybdenum alloy that is very difficult to machine. Here are some points to consider: 1. HM ULTRA SPEED core drill Material: Tungsten carbide with a special TiAlSiN coating Geometry: Optimized cutting edge geometry for difficult-to-machine materials Stability: The core drill must run very stably and with low vibration to avoid material hardening. 2. Cutting parameters Low cutting speed: Hastelloy is prone to work hardening, so work should be carried out at a significantly reduced speed. Feed rate: A constant, relatively high feed rate is important. The material must be drilled through in one pass. 3. Cooling Intensive cooling is essential – ideally with an internal coolant supply to dissipate heat directly at the cutting edge and increase tool life. In terms of tool wear, this will be slightly more favorable for the coated KB.
To Question 6
Yes. Use a multi-layer core drill of the HSS SPECIAL type. The special cutting geometry creates a cylindrical core without a protruding crown. This saves a lot of time, as multiple steel layers can be drilled in one operation without having to remove the core each time. Ideal for modifications to existing structures and in vehicle frame construction.