Quick Change Collet B-12x42 For Drilling Machine 18.5mm OD 12mm ID 42mm H

Changing a drill bit on a multi boring head should not cost a spindle setup. The B-12x42 quick change collet fits standard quick-change drilling units and releases the bit at the collet, so the spindle stays where it was set. 18.5 mm outer diameter, 12 mm inner diameter, 42 mm height, cross pin locking, 55 g per piece, 2 pcs per plastic box. It is the drill bit adapter for multi boring machines, multi-spindle drilling heads and furniture drilling work.

On a multi boring machine the hole spacing is set by the spindles, and the collet on each spindle decides how well that spacing holds. Three things go wrong on a busy head: bits sit in mismatched holders, so a bit change becomes a spindle reset; a holder gripping two flats instead of the whole shank lets the bit walk, so holes drift off index; and holders arrive in a mix, so the wrong part goes on.

The Quick Change Collet B-12x42 is a drill bit adapter for multi boring machines and woodworking drilling systems. The bit is released and re-clamped at the collet, so a size change need not become a spindle reset. 18.5 mm outer diameter, 12 mm inner diameter and 42 mm height decide whether it seats in a given unit.

Locking is by a cross pin. The pin holds the bit and carries the drive, so torque is not left to clamping friction alone at speed, and the bit stays square to the work for aligned holes. Each collet weighs 55 g, light enough that a full head is not loaded at the tool end.

Supply is 2 pcs per plastic box, so one collet goes on the head and one stays spare. It is listed for standard quick-change drilling units, multi-spindle heads and furniture manufacturing. Check the three dimensions against your unit before ordering.

What the B-12x42 changes at the spindle:

• Cross-pin drive — pin type is cross, so the bit is locked by a pin through the collet and torque passes through it, not through friction alone.
• 18.5 mm outer diameter — the seat that must match the bore of the drilling unit, measured on the collet you are replacing.
• 12 mm inner diameter — the bore for the bit shank, so a 12 mm shank is the fit rather than a near size.
• 42 mm height — the height the clamp on the unit expects, so the collet sits at the same depth as the part it replaces.
• 55 g per piece — a light holder, so a full head of spindles carries no extra mass at the tool end.
• Change at the collet — the bit is released and re-clamped in the holder, so one bit change does not become one spindle setup.
• Standard quick-change fit — listed for standard quick-change drilling units, so the part is ordered against the unit on the floor.
• Multi-spindle and multi-boring use — listed for multi boring machines, woodworking drilling systems and furniture manufacturing.
• 2 pcs per plastic box — the spare is on the shelf before the collet is worn, so downtime is fitting time.

Most shops live with one of two things: a bit that walks in a worn holder, or a spindle reset every time the bit size changes. The B-12x42 is aimed at both ends.

• Change the bit, not the setup. the bit is released at the collet, so the spindle stays where it was set for the run and the next bit goes in at the same depth.
• Hole spacing stays where it was set. a cross pin holds the bit square and the collet seats at 42 mm height, so depth repeats from spindle to spindle.
• One number to order against. the part is B-12x42 with 18.5 mm outer diameter and 12 mm inner diameter, three numbers that can be checked against the head before the order.
• Pin drive, not friction. torque goes through the cross pin, so the bit is not held by clamping force alone when the head runs at speed.
• A spare in every box. 2 pcs per plastic box means the replacement is on hand, so a worn collet costs fitting time instead of ordering time.
• Light at the tool end. 55 g each, so a head of several spindles is not loaded by its holders.
• One line covers a mixed floor. listed for standard quick-change drilling units and multi-spindle heads, so one item number covers the boring units in the shop.

Yes, if your unit takes a standard quick-change collet and your bits have a 12 mm shank. The collet is listed for standard quick-change drilling units, multi boring machines and multi-spindle drilling heads; check the 18.5 mm outer diameter, 12 mm inner diameter and 42 mm height against the part you are replacing before ordering.

A 12 mm shank. The inner diameter is 12 mm, so the bit must slide into a 12 mm bore; the outer diameter of the collet is 18.5 mm and its height is 42 mm.

It locks the bit and carries the drive. Pin type is cross: a pin through the collet holds the bit shank and passes torque from the spindle to the bit, so the grip does not rest on friction alone at running speed.

Yes. Height is listed as 42 mm, which is the overall height you compare with the part currently in the unit; if your clamp takes a different height, the collet will not seat at the same depth.

55 g per piece. That is light enough that a full head of spindles carries little extra mass at the tool end.

Two. Packing is 2 pcs per plastic box, so one collet goes on the head and the second stays as the spare.

No. It is a quick change collet: the bit is released and re-clamped at the holder, so the spindle stays where it was set and the change happens at the collet.

Ask for a quote. The price is quoted per order rather than fixed on this page, so send the collet model B-12x42 and the quantity you need and the price follows the order.