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Carat centring pins, support discs and quick-change adapters for core drills

Carat centring pins, support discs and adapters are the small parts that let a core drill start straight and switch quickly between machines. Without a centring pin, a large bit wanders as it starts to cut, especially freehand on a hard surface. They come under Carat machining tools.

Choose the centring pin by the bit and the machine. Some pins are meant for bits of a given diameter with an M16 connection, such as 60 mm, 150 mm or 340 mm. Others are made for the A-2211 and A-2212 drilling machines, in lengths of 60 mm and 420 mm, or for the A-2225 and A-3025. So always check the type designation of your machine before ordering.

A backing pad holds the centring pin in place inside the core bit and has to match the bit diameter: there are versions for 112, 132 and 162 mm. The quick-change adapters connect an M16 bit to a machine with an SDS-Plus or hexagon chuck, so the same bit works on more than one machine. They are supplied with a drill bit, so drilling can start without waiting for further parts.

Category Carat centering pin Carat centering pin
Category Carat hole saw arbor Carat hole saw arbor
Category Carat accessory/part drill bit Carat accessory/part drill bit
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