An annular cutter, also known as a core drill, cuts only around the edge of a hole and removes the centre as a solid slug. Because it removes less material than a twist drill, it can produce large, accurate holes faster and with less power.
Euroboor annular cutters are designed for use with magnetic drilling machines. The range includes HSS, HSS-Co and TCT annular cutters for different materials, diameters and cutting depths.
Cutter type
Best suited for
Main advantage
HSS
General metalworking in mild and structural steel, aluminium, copper and plastics
Versatile and accurate
HSS-Co
Repetitive drilling and more demanding materials
Greater hardness and heat resistance
TCT
Hardened, stainless and high-tensile-strength steel
Extremely hard, durable cutting teeth
High Speed Steel (HSS) annular cutters are a versatile choice for everyday fabrication and general metalworking. Their tooth geometry and spiral flutes support a fast, stable cut with effective chip removal and a smooth hole finish.
Euroboor HSS annular cutters feature an additional landing on the outside, helping them cut more accurately with less friction. The precision-ground inner surface gives the slug room to expand, helping prevent it from binding inside the cutter.
HSS-Co annular cutters are manufactured from M35 High Speed Steel containing 5% cobalt. The added cobalt increases hardness and helps the cutting edges retain their performance at higher temperatures.
Fully ground flutes support efficient chip removal, making HSS-Co a strong choice for harder materials, repetitive drilling and applications requiring higher cutting performance.
Tungsten Carbide Tipped annular cutters are designed for demanding drilling applications. Euroboor TCT cutters use durable carbide cutting teeth for materials such as HARDOX, stainless steel, high-tensile-strength steel and railway track.
Their spiral flute geometry supports effective chip removal, while the tooth positioning helps limit heat development. TCT cutters are also well suited to larger diameters and greater cutting depths.
The cutter diameter determines the size of the hole. The required cutting depth depends on the thickness of the workpiece.
Always select an annular cutter with sufficient cutting depth to pass completely through the material. Euroboor cutters are available in a wide range of diameters and cutting depths for both plate and pipe applications.
Euroboor annular cutters are fitted as standard with high-precision Weldon shanks. Depending on the cutter size and specification, two shank diameters are used:
Cutters with a double-shank design (WelNit) are also available. These can be used on machinery requiring either a Weldon or Nitto fitment, increasing compatibility across different magnetic drilling machines.
For Euroboor TCT cutters, diameters up to 60 mm use a 19.05 mm WelNit shank. Diameters from 61 mm use a 31.75 mm Weldon shank.
A correctly fitting pilot pin supports accurate drilling and smooth operation. It performs three essential functions:
The pilot pin must match the cutter diameter and cutting depth. An incorrect or poorly fitting pilot pin can affect centring, lubricant flow and slug ejection.
Using the correct cutting lubricant can significantly extend the life of an annular cutter. It reduces friction and heat while helping the cutting teeth work efficiently.
Annular cutters perform best with internal cooling and lubrication. This delivers lubricant through the pilot pin directly to the cutting area, where it is needed most.
The correct spindle speed depends on the cutter type, cutter diameter and material being drilled. TCT cutters generally require a higher spindle speed than HSS cutters under comparable drilling conditions. Using the recommended RPM helps control heat, improve cutting performance and extend cutter life. The Euroboor Cutting Speed Calculator provides a recommended spindle speed based on your cutter and application.
Vitesse conseillée (tr/min):
Souviens-toi de moi
Se connecter
Votre panier est vide
Inscrivez-vous pour recevoir des actus, des infos et des offres exclusives !