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Diamond Cores

FAQs

Match the thread specification on the core bit's barrel to the arbor's female thread, and the arbor's shank to your machine's chuck or spindle fitting. Common thread standards for dry core bits include 1¼-inch UNC and M16, while machine shanks vary between SDS-Plus, SDS-Max and standard parallel. Check both ends before ordering. If the thread or shank specification is not printed on the bit or packaging, the tool manufacturer's documentation is the reliable reference.

The pilot drill should be sized to match the guide hole specified for the core bit in use, typically between 6 mm and 8 mm for most hand-held dry core sizes, though larger cores may require a heavier pilot. The pilot centres the bit at entry and prevents walking on hard or glazed surfaces. Using an undersized pilot increases the risk of the core bit skewing on start, which accelerates segment wear and reduces accuracy.

Not always. Some arbors are interchangeable across dry and wet bits sharing the same thread standard, but wet core systems often use different thread pitches or incorporate a water-feed channel that dry arbors do not have. Always confirm the thread pitch, shank type and whether the arbor is rated for the rotational speed your machine produces in dry mode before fitting a dry core bit to an arbor purchased for a wet system.

Availability of multi-pack or trade quantities depends on the specific accessory and brand range listed. Pilots and adaptors for high-turnover core sizes are more commonly listed in packs suited to trade buyers. Contact the PartsForMachines team via WhatsApp 07754288583 or email [email protected] to confirm pack options and quantities for the accessories you need before placing a larger order.

Returns are accepted within 30 days of purchase, in original packaging, on orders delivered within the United Kingdom. For damaged-on-arrival items, report within 24 hours with photographs to [email protected] — we will typically arrange collection and replacement at no cost to you. For parts that don't fit your machine, the Fit Guarantee covers a hassle-free return at no cost. For buyer's remorse — you've changed your mind or ordered the wrong item, email us first to obtain a Return Merchandise Number; a restocking fee may apply. Refunds are issued to the original payment method once the return is inspected.

Delivery time depends on the product, your destination, and availability — the estimated time for any item appears on the product page, and 'Check where we deliver' confirms coverage for your postcode before you order. Next-day delivery is available on most products; the option appears at checkout when applicable. We deliver across the UK, Europe, the Middle East, and Africa. Use the country selector at checkout to confirm coverage and delivery options for your destination.

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Dry Core Accessories

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Dry core drilling puts particular strain on the accessories that hold, guide and adapt the system, and worn or ill-matched fittings are the most common reason a good core bit underperforms or pulls off-square. This section lists the mounting hardware, pilots, arbors and adaptors that keep a dry diamond core bit running true in a hand-held drill, SDS machine or hammer drill, covering the branded equipment ranges for which PartsForMachines acts as Authorised Distributor and Seller.

Selecting the right accessory starts with the core bit's thread or shank specification and the host machine's chuck or spindle fitting. Pilot drill diameter, thread pitch and arbor length all affect how cleanly the bit enters the material and how much the user is fighting the tool. Cross-referencing both the core bit specification and the machine's fitting before ordering is the practical habit that avoids returns; if the spec is unclear, use Ask Simon on the relevant product page for an instant fitment check. It is Abracs product throughout the dry core accessories here.

On site, dry core accessories take more punishment than their wet-cutting equivalents because heat management falls entirely on the material and the bit rather than a coolant stream. Pilots dull, threads wear and adaptors work loose under repeated hammer action. Replacing worn pilots and checking arbor thread condition as part of any core bit change keeps the system accurate and protects the bit from the kind of off-axis loading that chips segments prematurely.

For confirmation on thread standards, arbor compatibility or trade pack quantities, contact the PartsForMachines team via WhatsApp 07754288583 or email [email protected].

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