Diamond Core Drill Bit 70 mm with M14 Thread for Angle Grinder Vacuum Brazed Diamond Orange Dry Drilling for Tiles and Marble
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The diamond core drill bit with a diameter of 70 mm is designed for drilling clean circular holes in hard and brittle materials. It features an internal thread of M14, allowing it to screw directly onto the spindle of an angle grinder without the need for an additional chuck. The cutting edge is fitted with vacuum brazed diamond grains, capable of handling ceramic tiles, cladding, marble, granite, stone slabs, and glass. The core bit is intended for dry drilling without water cooling, although it can also be used with water for extended work. It is suitable for tilers, plumbers, and DIY enthusiasts during bathroom or kitchen renovations or when laying tiles.
- Hole diameter 70 mm – the core bit creates a hole with a diameter of 70 mm in tiles, cladding, stone, or glass.
- M14 thread – direct attachment to an angle grinder with M14 thread.
- Vacuum brazed diamond – diamond grains firmly bonded to the tool body for cutting hard and abrasive materials.
- Dry and wet drilling – drilling without the need for water cooling, although water can extend the tool's lifespan.
- Dimensions – diameter 70 mm, total length 60 mm, clamping part diameter 27 mm.
- Design – core bit with a side cut-out for the removal of drilled material.
- Suitable materials – marble, granite, stone slabs, ceramics, tiles, cladding, and glass.
- Drilling procedure – first, position the tool at a 45° angle and create a groove, then drill vertically at a 90° angle with a slight circular motion.
- Package contents – 1 piece of 70 mm diamond core drill bit in a plastic tube.
When working, we recommend starting with the core bit tilted at approximately 45° to create a crescent-shaped groove on the surface to prevent slipping on smooth glaze. Once the core bit is held in the correct position, gradually straighten it to a vertical position and drill with a gentle circular motion and even pressure. This procedure helps maintain a clean edge on the hole and reduces the risk of chipping the glaze. The plastic tube in which the core bit is supplied makes it easy to transport and store in the workshop.
The 70 mm diamond core drill bit with M14 thread is a practical addition to any angle grinder for those working with tiles, paving, or natural stone. The vacuum brazed diamond layer can handle even hard materials such as granite and marble, and the option for dry drilling simplifies work directly at the installation site. Directly screwing onto the grinder's spindle saves time when installing sanitary ware, kitchen units, and electrical installations. If the core bit is occasionally cooled with water during extended drilling, its lifespan will be extended, and its cutting ability will be preserved for future use. The core bit is suitable for both one-off home repairs and repeated use during renovations.
Delivery
Delivery to address€1.59
Estimated delivery: 29 October – 11 November
You only pay for delivery once per order, whatever its size.
We will email you the tracking number as soon as the seller makes it available.
Delivery guarantee: if your parcel does not arrive within 75 days of payment, we will refund your money or the goods will be sent to you again – whichever you choose.
Delivery is only possible to addresses in Ireland.
Need more information? Read our article Delivery and Payment.
Returns and Exchanges
Shop with confidence – LUNZO guarantees that your purchase goes smoothly. You arrange returns and exchanges directly with us, so there is nothing to sort out with the seller.
Returns30 days to return without giving a reason
Withdrawal period30 days from receipt of the goods
Deadline to send the goods backWithin 14 days of withdrawing from the contract
Return shipping costsYou pay the postage for sending the goods back to Spain. It is an international parcel, so it usually costs more than a parcel sent within Ireland. We charge no other fee.
RefundWithin 14 days of your notice of withdrawal, using the same payment method you used for the purchase. If you return the whole order, we will also refund the delivery cost.
Crediting of the amountUsually 2–10 working days, depending on the payment method
Product conditionYou may unpack the goods and try them as you would in a shop, and you can return them even without the original packaging
Returns addressQX-BOX AEMALL RETURN
Rotonda Rene Descartes, Parcela 101 – Nave 3
28070 Alcala de Henares, Madrid
Spain
How do I return goods?
- Email us at info@lunzo.ie with your order number and the items you are returning.
- Pack the goods and send them by post to the returns address in Spain.
- Send us the proof of dispatch with the tracking number – this lets us refund you without waiting for the parcel to arrive.
Faulty goodsUp to 6 years to claim for faulty goods
Did the goods arrive damaged, do they not work, is something missing from the parcel or do they not match the description? We will sort it out.
Period for claiming a faultUp to six years from delivery of the goods
RefundWithout undue delay once the claim has been settled, using the same payment method you used for the purchase
How does it work?
- Email us at info@lunzo.ie with your order number and a description of the problem, and attach photographs or a video.
- We will assess it and suggest a solution. Photographs are usually enough – please do not send the goods back until you have received instructions from us.
- We will settle your claim within 30 days at the latest – with a new item, a price reduction or a refund.
If the goods need to be sent back, we will refund the postage for a valid claim (just provide the receipt).
ExchangesA different size, colour or variant
Write to us within 30 days of receipt at info@lunzo.ie with your order number and the variant you are interested in. We usually reply within 24 hours.
If the variant is available, we will send you instructions for the exchange. You pay the cost of sending the original item back; the new variant will be sent to you at no further charge.
Need more information? Read our articles Returns and Exchanges and Faulty Goods.
Payment methods
Credit / debit card
Pay with your Visa or Mastercard through a secure payment gateway. Payment goes through instantly, so we can process your order straight away.
Apple Pay
Pay with a card saved in Apple Wallet on your iPhone, iPad or Mac. You confirm the payment with Face ID, Touch ID or your passcode.
Google Pay
Pay with a card saved in your Google account, on an Android phone or in the Chrome browser. You never have to enter your card number.
Bank transfer
Once you complete your order, we will send you the details for the bank transfer. Your order will be dispatched as soon as the payment reaches our account.
Revolut Pay
Pay with your Revolut account – simply confirm the payment in the Revolut app, without entering any card details. Payment goes through instantly.
Payment is made through a secure payment gateway and your card details are never stored anywhere on our side. We do not charge a fee for any payment method.
Need more information? Read our article Delivery and Payment.
About the seller
This product is sold and shipped by an external seller. LUNZO guarantees you a safe purchase: online payments go through a secure payment gateway, and you handle your order, returns and complaints with us.
The following information has been provided by the product seller, who is responsible for its accuracy. The seller acts as a trader.
Seller:
Gansu Constar Technology Group Co., Ltd.
Address: No.10, Chuangxin South Road, Baiyun District, Baiyun, Gansu, China
E-mail: ksdjt@foxmail.com
Telephone: +86 156 9392 3686
Manufacturer:
Gansu Constar Technology Group Co., Ltd.
Address: No.10, Chuangxin South Road, Baiyun District, Baiyun, Gansu, China
E-mail: ksdjt@foxmail.com
Telephone: +86 156 9392 3686
EU responsible person:
BioDomi GmbH
Address: Schokoladenring 13, 65795 Hattersheim am Main, Germany
E-mail: arcontact@biodomieurope.de
Telephone: +49 178 5749814
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