70mm Through Hole Boring Bit Carbide Tipped Drill Bit V Point Drill Woodworking

Need a through hole bored in wood, board or laminate without the rim splintering, and without hunting for a left-hand and a right-hand bit? The PRO-TH70 covers it: a V point carbide tipped head, 70 mm overall length, eight diameters from 5 mm to 15 mm, round shanks of 10 mm on the 5 mm to 10 mm bits and 14 mm on the 12 mm and 15 mm bits, and both directions — black for right hand, orange for left hand.

A shop boring through holes all day hits the same three things: a plain point that skates across the panel before it bites, a rim that tears out and needs filling before assembly, and an edge worn out before the order is finished. The PRO-TH70 removes all three.

It is a 70 mm through hole boring bit with a carbide tipped V point. The V form seats on the marked surface and starts the hole there, so the bit does not walk, and the carbide tip holds that form as it wears. Diameters are 5, 6, 7, 8, 9, 10, 12 and 15 mm.

Shanks are round and matched to size: 10 mm on the 5 mm to 10 mm bits, 14 mm on the 12 mm and 15 mm bits, so a large diameter is never driven through a small collet. Both directions are stocked, black right hand and orange left hand, because neighbouring spindles turn opposite ways.

All eight sizes are 70 mm overall, so hole depth does not change when the size does. The same bit is used on solid wood, wood composites, plastic and laminated panels, on boring machines, drilling machines and CNC centres, and length can be customised to drawing.

A bit is bought on geometry and fit, so both are set out in order.

• Carbide tipped V point — the head is carbide and the point V form, so the bit starts the hole on the mark instead of skating past it.
• Eight diameters, 5 to 15 mm — 5, 6, 7, 8, 9, 10, 12 and 15 mm, covering the through hole sizes a boring head is usually asked for.
• 70 mm on every size — the body is the same length at 5 mm as at 15 mm, so bore depth holds when the diameter changes.
• 10 mm and 14 mm round shanks — 5 mm to 10 mm bits run a 10 mm shank, 12 mm and 15 mm bits run a 14 mm shank.
• Left and right rotation — both directions are stocked, because opposing spindles on one head turn opposite ways.
• Colour-coded direction — right hand is black and left hand is orange, so the bit is identified by looking at it.
• Cleaner rim at the hole — the V point seats before the edge cuts, which reduces tear-out around the perimeter of the hole.
• Plastic tube per bit — one bit per tube for retail, carrying and transport, packed on into a standard export carton.
• Customised length — 70 mm is the stock length, and other lengths are made to your drawing.

The choice is a plain point bit that blows out the rim, or an outsourced boring run. The PRO-TH70 sits before both:

• Your part skips the fill bench. The point seats before the edge cuts, so the rim stays whole and one fill step per hole drops off the route.
• One shelf line instead of eight. The 5 mm to 15 mm range is one family at one 70 mm length, so stock planning stays on one line.
• Right hand, left hand, no guesswork. Orange is left, black is right, so a bit goes into the correct spindle first time instead of after a test cut.
• Depth holds across the range. Every size is 70 mm overall, so moving from 8 mm to 12 mm does not shift the head setup.
• A shank that matches the cut. 14 mm on the 12 mm and 15 mm bits carries the bigger diameter without an adaptor.
• The point outlives a plain point. Carbide at the tip keeps the V form as it wears, so the bit bores cleanly instead of burning the rim.
• Retail-ready packing. One bit per plastic tube, then a standard export carton, so bits can be issued or resold singly.
• Custom length against your drawing. Stock is 70 mm and other lengths are made per drawing, so a special head does not force a second supplier.

Eight diameters: 5, 6, 7, 8, 9, 10, 12 and 15 mm. All eight are 70 mm overall and every one of them is stocked in both left-hand and right-hand rotation.

Two sizes, matched to the diameter. The 5 mm to 10 mm bits use a 10 mm round shank and the 12 mm and 15 mm bits use a 14 mm round shank, so the large sizes are never run through a small collet.

By colour. Left-hand rotation is orange and right-hand rotation is black, so a bit is identified by looking at it rather than by reading a stamp under a light.

It will if the machine takes a round shank of 10 mm or 14 mm. Measure the collet or chuck before ordering, because the 12 mm and 15 mm bits need the 14 mm shank and the smaller sizes need 10 mm.

It centres the hole. The V form seats on the marked point before the cutting edge engages, which stops the bit walking and reduces tear-out at the perimeter of the hole, so the rim needs less filling.

Through holes are the primary use — it is a through hole boring bit, 70 mm overall. On boring machines the same V point is also used to start a blind hole squarely on the mark, so send the drawing if the depth matters.

Wood and board: solid wood, wood composites, plastic and laminated panels. It is a woodworking bit for boring machines, drilling machines and CNC machining centres, not a metalworking bit.

Never force it. Feed at a rate that lets the bit cut, take extra care entering the wood with the small diameters, and do not run a bit that is worn, chipped or damaged.