Crown 12mm Diamond Core Drill Bits For Stone Working Length 45mm / 55mm

Basic Information
Place of Origin: China
Certification: BG, SGS
Model Number: BGB12, BGB(UNC)12
Minimum Order Quantity: 50pcs
Price: Negotiable
Packaging Details: Plastic box, Paper box
Delivery Time: Around 30-35days
Supply Ability: 2000pcs per month
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12mm Diamond Core Drill Bit For Stone , Working Length : 45mm / 55mm



12mm diamond core drill bits is especial for stone drilling, such as marble, granite, sandstone, limestone, etc. Made for decoration and stone fabrication applications.


12mm outside diameter.

3/8” shaft with 45mm working length.

M14 thread / 5/8“-11 thread with 55mm working length.

Segment height is 8mm.

Segment type: Crown segment

Drilling method: Wet drilling.


More durable for industrial or business use.


Item No. Diameter Segment Dimension Teeth No. Total Length
mm Height Thickness
BGB12 12 8 2.5 Crown 83
BGB(UNC)12 12 8 2.5 Crown 103


How dose a diamond core bit work?

A diamond core bit does not cut but works by milling. During the sharpening process performed at the factory, individual diamond crystals are exposed on the face and sides of the segment and it is these that do the milling work. The metal matrix holds each diamond in place. During the work, each diamond is supported by a comet’s tail which strengthens the supporting action of the bond immediately “behind” the diamond crystals.
A diamond tool properly suited to the material to be cut, the equilibrium between the work of the diamond and the abrasion-resistance of the bond is optimum; the diamond is held in place until it is destroyed and new crystals appear. It is in this equilibrium that all the quality of the diamond tool resides.
A core bit intended for cutting hard, dense (less abrasive) materials requires a softer segment bond. This wears out more rapidly, by replacing the worn diamonds relatively quickly so that the blade continues to cut.
Otherwise, for cutting soft, abrasive materials must have a hard, abrasion-resistant segments in order to retain the diamonds longer.


45mm 1 3/4" Diamond Core Drill Bits For Sandstone / Limestone



1) Can you company accept OEM?
We accept OEM orders for all products, as well as buyers' logos.

2) Quality Control?
Each product is strictly checked by of QC dept. We have completed file data in our computer which listed the whole processing of each order. Once the quality of sample order confirmed by clients, we will keep the same formula in the following orders. 15years producing experience, we will bring the most suitable products based on different markets.

3) Shipping Methods?
Air Freight when gross weight is above 45kg and less than 100kg. Fast delivery
Sea Freight when the gross weight is above 100kg. Cheaper freight charge.
Courier (TNT, DHL, FedEx, Ups, etc). Small try order, door to door service.
4) Minimum Order and Delivery?
Minimum order: negotiable.
Delivery: 15 to 45 days. Based on the quantity per order.


45mm 1 3/4" Diamond Core Drill Bits For Sandstone / Limestone

Contact Details

WhatsApp : 8618936085316