Solid Carbide Dowel Bit TCT Blind Hole Drill Bit Tungsten Carbide Boring Bit

Will this bit fit the machine already on your floor? Yes, if the unit takes a 10 mm shank. The TCT-BH57 is a solid tungsten carbide dowel bit for blind hole drilling on woodworking drilling machines, supplied in 57 mm and 70 mm overall length, in ten drill diameters from 2 mm to 8 mm, in left and right rotation. Each bit ships in its own plastic tube inside an export carton, and custom diameters are made to order from 50 pcs against your artwork.

A shop drilling dowel holes hits the same three things: the bit walks off the mark on entry, the rim of a blind hole lifts and splinters on the visible face, and a dull edge starts burning wood instead of cutting it, so the same setting stops producing the same hole.

The TCT-BH57 is a solid tungsten carbide dowel bit for blind hole drilling on woodworking drilling machines. The cutting edge is TCT / tungsten carbide, and the engineered flutes lift chips out of the hole instead of packing them at the bottom. Ten drill diameters run from 2 mm to 8 mm on the same 10 mm shank.

Overall length is 57 mm or 70 mm, so one shank covers a shallow dowel seat and a deeper blind hole. Left and right rotation are both supplied, to match the spindle direction of the unit. Precise cutting edges keep the rim clean, and the point is ground for strong perforation so the bit reaches depth without stalling.

Each bit ships in an individual plastic tube inside an export carton sized to your quantity, so edges arrive un-chipped. Diameters outside the ten listed are OEM at 50 pcs MOQ against your artwork. Price is quoted per order.

Ten diameters, two lengths, one 10 mm shank — the details that decide where a dowel hole lands.

• Two lengths on one shank — 57 mm and 70 mm overall, both on the same 10 mm shank, so one spare-parts line covers shallow seats and deeper blind holes.
• Ten drill diameters — 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6 and 8 mm, the sizes used in dowel and boring work on drilling machines.
• Left and right rotation — every listed diameter comes in R and L, so the bit matches the spindle instead of the other way round.
• Tungsten carbide edge — the cutting edge is TCT / tungsten carbide; the published characteristics are long service life, sharp blade and strong perforation.
• Edges that stop splintering — precise cutting edges cut the rim of a blind hole rather than pushing it, which keeps the visible face intact.
• Flutes engineered for chip removal — chips leave the hole instead of compacting at the bottom, which is why bits usually stall at depth.
• 10 mm shank, standard fit — the shank is 10 mm, the size of dowel drilling collets, so no new holder is needed.
• One piece, one plastic tube — each bit travels in its own tube inside an export carton sized to the order, so edges arrive un-chipped.

The usual choice is a cheap bit replaced every month, or a special order that keeps the machine waiting.

• One shank, ten sizes. Order 2 mm to 8 mm on the same 10 mm shank, so the holder on the machine stays where it is and the spares bin holds one family of bits.
• Fewer tool changes. 57 mm and 70 mm share the shank, so going from a shallow dowel seat to a deeper blind hole is a bit swap, not a setup change.
• Scrap moves off the panel face. Precise cutting edges cut the rim instead of pushing it, so a hole that comes out clean saves the panel it was drilled into.
• Spindle direction stops being a purchasing problem. R and L are both listed, so you order the rotation the spindle actually runs.
• Depth without burning. Engineered flutes clear chips from the bottom of the hole, which is where a blind hole usually starts to burn.
• A replacement part, not a project. 10 mm shank, individual plastic tube, export carton sized to your quantity — a reorder behaves like any other spare part.
• Your diameter from 50 pcs. If your dowel is not in the ten listed sizes, the bit is made to your artwork from 50 pcs, so a non-standard joint still runs on the machine you own.

Yes, if the machine takes a 10 mm shank. The shank diameter is 10 mm on both the 57 mm and the 70 mm bit, so it goes into a standard dowel drilling collet without an adapter.

Reach, not fit. Both are built on the same 10 mm shank and are offered in the same ten drill diameters, so the 57 mm bit suits a shallow dowel seat and the 70 mm bit reaches a deeper blind hole.

Ten, from 2 mm to 8 mm: 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6 and 8 mm, each in 57 mm or 70 mm length and in left or right rotation.

Yes. Rotation direction is set per bit and both R and L are supplied, so the bit has to match the direction your spindle runs — a right-hand bit in a left-hand spindle will not cut a clean hole.

Yes. OEM customisation is supported at 50 pcs MOQ, and you supply the artwork first so the geometry and the edge are confirmed before the run starts.

Blind holes. The TCT-BH57 is a dowel and blind hole bit; through-hole bits and countersink boring bits are separate items in the same range, so check the item you order matches the joint.

One bit per individual plastic tube, then a standard export carton whose size follows the quantity ordered, so a small order and a full carton both arrive with the edges intact.

MOQ is 50 pcs on customised bits and the price is quoted per order. Shipping is by air, by sea or by express, chosen according to the order quantity.