الصين مخصص لقم مثقاب النجارة المصنعين والموردين

Twenty thousand quarter-inch hex bits left a factory in Jiashan, reached a warehouse in Rotterdam, and could not enter a single rotary hammer in the buyer's catalogue. Every machine in that range used an SDS-Plus chuck. The order died on a 10 mm detail, not on steel grade, heat treatment or price....

A site manager on a high-rise concrete pour opens a damaged pallet of masonry bits and finds round-shank drills next to an SDS-Plus rotary hammer. Every bit spins in the chuck without impact, and the whole shift is lost. This happens when the most basic physical specification of a drill bit is ove...

Cutting a 35 mm hinge recess in a solid beech cabinet door is where the spade vs forstner bit choice stops being theoretical. A spade bit will blast through the wood in less than two seconds and leave a torn, splintered rim that needs sanding and filler before the hinge sits flush. A forstner bit ...