Tap Holder (with Safety Clutch)

The GSS series quick-change tapping inserts are designed for professional thread cutting applications with magnetic drilling machines. Equipped with an integrated safety slip clutch, these inserts provide maximum protection for taps by preventing breakage when the tap reaches the bottom of a blind hole. This makes them ideal for blind hole threading, while also being perfectly suitable for through hole applications. The safety clutch automatically disengages when excessive torque is reached, ensuring consistent thread quality and protecting both the tool and the machine. Combined with the keyless quick-change system of GSW tapping chucks, these inserts allow fast and screw-free mounting, significantly improving efficiency and reducing downtime. Manufactured with high precision, GSS inserts ensure accurate alignment, smooth operation, and reliable performance even in demanding industrial environments. They are available in multiple sizes to cover a wide thread range from M6 up to M42. For optimal performance, use with magnetic drilling machines featuring variable speed control, torque control, and reversible rotation. Choose BDS GSS tapping inserts for safe, efficient, and high-precision threading operations. What breaks a tap in the hole is usually not the operator but a sudden rise in torque. When the tap bottoms out, when the flutes pack with swarf, or when the feed continues past the end of the thread, full motor torque lands on the tap body and an HSS tap reaches its breaking point rather than its cutting point. The safety-clutch holder exists to catch that moment: once the torque threshold is passed the clutch slips, drive to the tap is cut, and the tap stops instead of snapping. Getting a broken tap out of a hole usually puts the component itself at risk, which is why the clutch is a damage limiter rather than a convenience. The range is defined in twenty-three sizes from M5 to M42, and each adapter takes one tap size — codes covering two sizes together, such as M22–M24, are the exception. The tap shank has to match the adapter seat. The digits 2, 3 and 4 in the code identify the body series: series 2 is defined from M5 to M22, series 3 from M12 to M30, and series 4 from M20 to M42. Where the ranges overlap, the choice follows the tap-holder mounting on the machine. Used with the BDS HSS tap range, drilling and tapping finish in one setup. - Size 2, for tapping range approx. M6, square 6 / 4.9 mm, with safety clutch - Size 2, for tapping range approx. M5, square 4.5 / 3.4 mm, with safety clutch - Size 2, for tapping range approx. M8, square 8 / 6.2 mm, with safety clutch - Size 2, for tapping range approx. M10, square 7 / 5.5 mm, with safety clutch - Size 2, for tapping range approx. M12, square 9 / 7.0 mm, with safety clutch - Size 2, for tapping range approx. M14, square 11 / 9.0 mm, with safety clutch - Size 2, for tapping range approx. M16, square 12 / 9.0 mm, with safety clutch - Size 2, for tapping range approx. M18, square 14 / 11 mm, with safety clutch - Size 2, for tapping range approx. M20, square 16 / 12 mm, with safety clutch - Size 2, for tapping range approx. M22, square 18 / 14.5 mm, with safety clutch - Size 3, for tapping range approx. M12, square 9 / 7.0 mm, with safety clutch - Size 3, for tapping range approx. M14, square 11 / 9.0 mm, with safety clutch - Size 3, for tapping range approx. M16, square 12 / 9.0 mm, with safety clutch - Size 3, for tapping range approx. M18, square 14 / 11 mm, with safety clutch - Size 3, for tapping range approx. M20, square 16 / 12 mm, with safety clutch - Size 3, for tapping range approx. M22, square 18 / 14.5 mm, with safety clutch - Size 3, for tapping range approx. M27, square 20 / 16 mm, with safety clutch - Size 3, for tapping range approx. M30, square 22 / 18 mm, with safety clutch - Size 4, for tapping range approx. M20, square 16 / 12 mm, with safety clutch - Size 4, for tapping range approx. M22, square 18 / 14.5 mm, with safety clutch - Size 4, for tapping range approx. M27, square 20 / 16 mm, with safety clutch - Size 4, for tapping range approx. M30, square 22 / 18 mm, with safety clutch - Size 4, for tapping range approx. M33, square 25 / 20 mm, with safety clutch - Size 4, for tapping range approx. M36, square 28 / 22 mm, with safety clutch - Size 4, for tapping range approx. M42, square 32 / 24 mm, with safety clutch