Drill Bit Adapter For Multi Boring Machine B-12x44 Black Drilling Machine Spare Parts

Need to change a drill bit on a multi boring machine without re-setting the head? The B-12x44 quick change collet seats into a 12 mm bore and holds the bit at a 44 mm working height, so the next bit sits where the last one did. Black-finished high-strength body, 60 g per piece, 2 pcs per plastic box. It is the spare you keep on the shelf for a multi-spindle drilling unit, not a machine you have to wait for.

A drilling line usually stops for the same three reasons: a bit change that takes longer than the drilling pass, a replacement bit that sits slightly off the height of the last one, and a spare part that does not match the spindle bore. Each delay is short, but across one shift on a multi boring machine they become panels that have to be re-drilled. The B-12x44 drill bit adapter is made to close all three gaps at once.

It is a quick change collet, not a bit and not a spindle. Its only job is to hold the boring bit and release it in one motion. The 12 mm inner diameter matches the standard boring bit shank, and the 44 mm height puts the bit back at the working height the head was set for. Body weight is 60 g per piece, so the spindle nose carries no extra load when you fit it.

Both dimensions are fixed, not adjustable, so a new adapter behaves like the part it replaces: tool change becomes pull and seat instead of loosen, set and check. In furniture manufacturing, cabinet production and general woodworking shops, that repeatability is what keeps a panel line at its set cycle time. Supplied 2 pcs per plastic box, it is a maintenance shelf item rather than a project purchase.

What separates this collet from a generic holder is how little it asks you to adjust:

• Fixed 12 mm bore — the collet takes the standard boring bit shank directly, with no sleeve between bit and spindle.
• 44 mm working height — a replacement seats the bit at the same height as the old part, so the head is not re-dialled.
• Quick change action — pull to release and push to seat, one hand movement per bit instead of a clamp-and-check cycle.
• 60 g per piece — light enough to keep a spare in a tool bag; ten pieces add 600 g.
• 2 pcs per plastic box — the box quantity matches the one or two seats that usually wear at a time.
• Black finish — the black surface rubs through at the collet mouth, so a worn seat shows before it slips.
• High-strength body — built from a high-strength material for wear resistance under continuous drilling, not a soft casting.
• No set screws — there is no clamp screw or dial on the part, so nothing drifts out of setting between shifts.
• Spare-part fitment — made for multi boring machines and multi-spindle drilling units, in the 12 mm holder size.

If you run a boring head, you know the two bad options: wait for a machine-maker part, or keep running a collet that no longer seats straight.

• A bit change is no longer a setup. The 12 mm bore and 44 mm height are fixed, so the next bit lands where the last one did.
• One part number for the whole head. Every spindle takes the same collet, so the shelf holds one item, not a drawer of mixed sizes.
• Wear shows before it costs a panel. The black finish wears through at the collet mouth, giving a replace signal ahead of a slipping bit.
• Spares that fit in a tool case. At 60 g per piece, ten pieces weigh 600 g, so a service visit can carry its own stock.
• Buy in twos, not in pallets. Packed 2 pcs per plastic box, the spare count stays matched to the seats that actually wear, and the drawer does not fill up with odd quantities.
• Reordering needs one number. The part is coded B-12x44, so a repeat order is a single model line, not a drawing.

Only if your spindle takes a 12 mm bit shank and the old collet is 44 mm high. Measure those two numbers on the part you are replacing; a 12 mm x 44 mm quick change collet is a direct swap, anything else is not.

It is a holder. The collet grips the boring bit, so the bit itself is ordered separately.

Not the same: the number after the x is the height, and this part measures 44 mm. Check the height on your spindle before ordering, and contact us if your part is marked 42.

Two. Each plastic box holds 2 pcs, and one piece weighs 60 g.

One movement. Pull the old bit out and push the new one in; there is no set screw to loosen and no height to re-check.

A high-strength body with a black finish. The black surface also works as the wear indicator at the collet mouth.

No. The quick change structure works by hand, with no fixture and no spanner.

China, and price is by quote. Country of origin is China; send the model code B-12x44 and the quantity you need and we will quote from that.