Hinge Boring Bit Router Bits With Carbide Tipped Woodworking Drilling Tool

Need a hinge cup or dowel hole that lands on the mark, in solid hardwood as well as veneered board? This tungsten carbide split drill bit covers 12 mm to 80 mm in diameter on one 10 mm shank, in 57 mm and 70 mm body lengths. The split point bites at the punch mark instead of walking across it, and the carbide-tipped cut leaves a cut rim on veneer. Bits are made in right-hand and left-hand rotation, and sizes outside the standard range are customised.

Shops that bore hinge cups and dowel holes keep running into the same three problems: the bit walks off the punch mark before it bites, the veneer or melamine face tears out around the rim, and the drill drawer holds six diameters from six suppliers with six different edges. This bit is built to take those three in one pass.

The Carbide Split Drill Bit is a carbide-tipped hinge boring bit for woodworking drilling machines. Its split point puts a cutting edge on both sides of the centre, so the bit locates on the punch mark instead of skidding past it. The cutting edges are tungsten carbide set in a steel body, which keeps the hard part at the wood and the tough part in the chuck. Diameters run from 12 mm to 80 mm, in 57 mm and 70 mm overall length, all on the same 10 mm shank.

Bits are supplied in right-hand and left-hand rotation, so a twin-spindle head can run one spindle each way. The 10 mm shank is the boring-head and drill-chuck size used on woodworking machines, so no adaptor sits between spindle and bit. Diameters, lengths and shank details outside the standard 12–80 mm range are made as custom items. Price is quoted per order, because the diameter and the length decide it.

What separates this bit from a general-purpose twist drill is the geometry.

• Split point carries the location — a cutting edge sits on both sides of the centre, so the bit bites at the punch mark instead of wandering across it.
• 12 mm to 80 mm on one shank — hinge cups, dowel holes and through holes run on the same 10 mm shank, so the boring head keeps one collet.
• 57 mm and 70 mm bodies — the 57 mm body suits standard hinge boring heads; the 70 mm body adds 13 mm of reach at the spindle.
• Carbide tips, steel shank — the edge that meets the wood is tungsten carbide; the part held in the chuck stays steel.
• Right-hand and left-hand — both rotations are made, so a twin-spindle borer running one spindle each way is tooled from one order.
• Rim cuts before the centre clears — the outer rim scores the hole edge ahead of the centre point, which keeps veneered and melamine-faced board from being pushed through.
• One geometry across the range — the tip pattern repeats from 12 mm up to 80 mm, so an operator does not have to learn a different bit for every diameter.
• Custom sizes off the shelf range — anything outside the 12–80 mm standard range, including shank details, is made to order from the same workshop.

The real choice on a boring job is between a cheap bit that tears the face and a set of single-diameter bits that each cover one hole. A carbide-tipped range from 12 mm to 80 mm removes that either/or.

• A hole stays where you put it. the split point does the locating, so a bored panel does not come back for a plug and a re-drill.
• One shank covers the range. from 12 mm to 80 mm the shank stays 10 mm, so the collet, the depth stop and the operator's setup do not change between sizes.
• Veneer edges survive the cut. the rim cuts the hole edge before the waste is lifted, so a hinge cup seats flush without a patched-in repair and a second pass.
• Left and right spindles, one line. a twin-head borer running opposite rotation is tooled in a single order, not two separate item codes.
• Wear lands on the tip, not the shank. the tungsten carbide edge wears while the steel body and 10 mm shank stay true, so the bit that goes back in the spindle still runs on centre.
• Custom sizes stay with one supplier. the 12–80 mm standard range and the custom route come out of the same workshop, so a special does not split the order across two vendors.

It is for hinge cup, dowel and through-hole boring in wood. One 10 mm shank covers 12 mm to 80 mm diameters, so cabinet hinges, dowel joints and cable runs are bored without changing the collet.

No. The split point puts a cutting edge on both sides of the centre, so the bit bites at the punch mark instead of skating over it, and the hole lands where it was marked.

12 mm to 80 mm in diameter, in 57 mm or 70 mm overall length. Every size in that range runs on the same 10 mm shank, so a set of diameters shares one chuck.

Yes, if the chuck or collet takes a 10 mm shank. That shank is the size used on woodworking boring heads and standard drill chucks, so no adaptor is needed between spindle and bit.

Yes. Bits are made in right-hand and left-hand rotation. That matters on twin-spindle heads that run one spindle each way, because both spindles can be tooled from one order.

Yes. The outer rim scores the hole edge before the centre clears the waste, so veneer and melamine faces are cut rather than pushed through, and the hinge cup seats flush.

Yes. Customization covers diameters, lengths and shank details outside the standard 12–80 mm range; the standard sizes and the custom work come from the same workshop.

Price is quoted per order. Tell us the diameter, the 57 mm or 70 mm length and the rotation you need, and the quote is built on that combination rather than a single list price.