Spaced model Panel bolts(2)

Product Description

Diameter of aiguille:*1mm Depth of aiguille:*5mm Unit:1set Size are available with your requirements. Characteristic one, back anchor bolt dilatant is a sequential structure—decompressing ring.When decompressing ring is expanding, the down diamete of it is augmenting but the up diameter is minishing.At the monment, the shape of decompressing ring is changed from cylindrical surface to circular conical surgace, and surface area is the same. Characteristic two, after the decompressing ring expands, the radius of circual conical curved surface equals to the radius of stone cut-underhole circual conical curved surface, thes two curved surfaces form as meshing state of concentric curved surface—no stress meshing state. Characteristic three, due to the decompressing ring and stone cut-underhole are conical meshing(the same kind products nearly are dot meshing), meshing area increases, meshing pressure depresses, that could effectively protect stone from high pressure.