TCT Brad Point Dowel Drill Bits Crown Dowel Drill Bits Brad Point Drill Bit

Yes - CRN-BH57 covers blind-hole dowel boring in wood from 5 mm to 15 mm diameter on one 10 mm shank. It is a tungsten carbide tipped brad point bit: a centred brad and two spurs score the rim before the flutes cut, four slots clear the chips, and left-hand and right-hand bits are colour coded so a pair is never swapped. Overall length is 57 mm or 70 mm. Eleven diameters, five of them in 70 mm only. Custom dimensions start at 50 pcs with artwork. Price on request.

A shop boring dowel holes on a CNC drill or a multi-spindle boring machine hits three problems: a breakout ring that has to be sanded out, hole diameters that drift between batches of bits, and an edge that burns the panel after a few hundred holes. CRN-BH57 is built to remove all three.

It is a tungsten carbide tipped brad point bit for blind holes in wood. The tip is a crown: a centred brad with two cutting spurs, so the rim is scored before the flutes lift the chip and the face stays clean. Four slots behind the cutting edge carry chips out instead of packing them in. Left and right hand bits are a matched pair for machines boring both sides at once.

Diameters run 5 mm to 15 mm in 1 mm steps - eleven sizes, so an 8 mm dowel gets an 8 mm bit. Overall length is 57 mm or 70 mm: the 5, 6, 7, 8, 10 and 12 mm bits come in both, while 9, 11, 13, 14 and 15 mm come in 70 mm. Every size shares a 10 mm round shank, so one collet covers the range.

Tips are tungsten carbide on a steel body, for plywood, hardwood, particleboard and MDF. Each bit ships in its own plastic tube inside an export carton sized to the order.

What separates these bits from a general-purpose brad point drill:

• Crown brad point - a centred brad plus 2 spurs score the rim before the flutes cut, keeping the hole edge intact on veneered and melamine-faced board.
• Four chip-removal slots - chips leave the hole instead of being re-cut, so the bit runs cooler and the inner wall stays round.
• 11 diameters in 1 mm steps - 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15 mm, matched to metric dowel sizes.
• Two lengths - 57 mm and 70 mm; 5 to 8, 10 and 12 mm in both, 9, 11, 13, 14 and 15 mm in 70 mm only.
• One shank for the set - all eleven sizes on a 10 mm round shank, so no second collet.
• Left and right hand, colour coded - orange for left hand, black for right hand, so a pair on a twin-head machine cannot be swapped.
• Tungsten carbide tips - carbide brazed to a steel body; the tip holds its edge in particleboard and MDF.
• Four substrates - plywood, hardwood, particleboard and MDF are bored with the same 5-15 mm range.
• Packed one per tube - each bit in its own plastic tube, tubes in an export carton sized to the order.
• Custom dimensions from 50 pcs - send artwork and the bit is ground to your diameter.

The usual choice is between an outside boring job and a cheap bit that is replaced mid-order. These bits sit between the two.

• Less sanding after boring. Two spurs score the rim before the flutes cut, so the breakout ring that has to be sanded off a veneered panel stays small - one operation less on every panel.
• Metric holes, not near-metric. 11 diameters from 5 to 15 mm at 1 mm steps give an 8 mm dowel an 8 mm hole, so glue lines stay even across a batch.
• Paired bits stay paired. Orange left hand, black right hand - a twin-head machine cannot be loaded with two right-hand bits, the mistake that scraps a whole shift of panels.
• One collet, eleven sizes. A 10 mm round shank on every diameter keeps tooling at one holder instead of a drawer of adapters.
• Two depths from one stock line. 57 mm for standard 16-18 mm panels, 70 mm for deeper or stacked work, with only the five largest diameters 70 mm only.
• Custom sizes without a tooling programme. A minimum of 50 pcs plus artwork gets a made-to-dimension bit; no separate grinding setup to negotiate.
• A worn bit is a spare part. The 10 mm shank, the head and the collet stay in service; one tube replaces one worn bit instead of a complete boring head.

Blind dowel holes in wood. The crown point - a centred brad with two spurs - scores the rim before the flutes cut, so a dowel sits at a clean, splinter-free edge in plywood, hardwood, particleboard or MDF.

Eleven diameters from 5 mm to 15 mm, in 1 mm steps. Five of them - 5, 6, 7, 8, 10 and 12 mm - come in both 57 mm and 70 mm; 9, 11, 13, 14 and 15 mm come in 70 mm only.

One will do if your machine bores from a single side. Twin-head and opposed-spindle machines need a matched pair, so both directions are supplied and colour coded: orange for left hand, black for right hand.

Yes, if the machine takes a 10 mm round shank - the same shank on all eleven diameters, so one collet covers the whole range and no adapter is needed.

Far less than a plain twist bit. The two spurs cut the surface fibres before the flutes lift the chip, so the breakout ring stays small and the inner hole keeps its diameter.

Yes. Dimensions are customised from an MOQ of 50 pcs, and we ask for artwork so the diameter is confirmed before grinding.

One bit per plastic tube, tubes packed in a standard export carton sized to the order quantity. Shipping method is agreed per order - your forwarder or ours.

Price is quoted per order, because it depends on diameter, length, quantity and direction. Send the size list and quantity and you get a quotation back.