carbon steel wedge penetration expansion anchor bolt fish shell zinc-plated aluminum fixed bolt iron expansion screw

expansion screws anchors are generally referred to as metal expansion screws. the fixation of expansion screws uses wedge slope to promote expansion to generate friction grip force to achieve the fixing effect. one end of the screw is threaded and the other end has a taper. the outer bread is a sheet of iron (some are steel pipes), and the half of the iron cylinder (steel pipes) has several cuts. put them together into the hole laid on the wall, then lock the nut, and pull the screw out, pull the taper into the iron cylinder, and the iron cylinder is raised, so it is tightly fixed on the wall. it is generally used for fastening protective grating, awning, air conditioner, etc. on cement, brick and other materials. however, its fixation is not very reliable. if the load has a large vibration, it may loosen. therefore, it is not recommended to install ceiling fans.
the expansion screw anchors consists of screw and expansion pipe and other components. the tail of the screw is conical, and the inner diameter of the cone is greater than expansion pipe inner diameter. when the nut is tightened, the screw moves outward, and the cone part moves through the axial movement of the thread, thus forming a large positive pressure on the outer peripheral surface of expansion pipe, and the angle of the cone is very small, so as to form friction self-locking between the wall, expansion pipe and cone, thus achieving the fixing effect.
the spring pad on the expansion screw anchors is a standard part. because its opening is staggered and elastic, it is called a spring washer, the function of the spring washer is to use the sharp sharp angle of the wrong mouth to pierce into the nut and flat pad to prevent the nut from loosening.
flat pad is also a standard part. its function is to evenly distribute the pressure of nut on the connected parts.
expansion bolts are classified into: 45, 50, 60, 70, 80,
expansion screw material: mainly divided into austenite a1, a2, a4,
martensite and ferrite c1, c2
no. 45 steel, for important or special purpose thread coupling, 15cr ,20cr,40cr,15mnvb,30crmrsi and other alloy steel with higher mechanical properties can be selected.
select different expansion screws according to the actual situation of the wall. generally, there are the following 6 × 60, 6 × 80, 6 × 120, and 6 × 150.
6 × 60: total length 60 mm, casing length 45 mm, diameter 8mm, wall thickness 0.7mm, surface plated color zinc; screw length 60 mm, diameter 6 mm, thread part 35 mm, the bottom rod hammer is 8mm conical, with a surface of plated color zinc; the nut outer diameter is 10 mm octagonal, thickness is 5 mm, and the surface is white zinc plated; the gasket outer diameter is 13 mm, thickness is 1mm, inner diameter is 6 mm, the surface is plated with white zinc; the shrapnel is a ring with an outer diameter of 9mm, an inner diameter of 6mm and a thickness of 1.6mm.
6 × 80: the total length is 80mm, the casing length is 65mm, the diameter is 8mm, the wall thickness is 0.7mm, and the surface is plated color zinc; the screw length, nut, gasket and shrapnel are the same as above.
6 × 120: total length 120mm, casing length 105mm, diameter 8mm, wall thickness 0.7mm, surface is plated color zinc; screw length, nut, gasket, shrapnel are the same as above.
6 × 150: total length 150mm, casing length 135mm, diameter 8mm, wall thickness 0.7mm, surface is plated color zinc; screw length, nut, gasket, shrapnel are the same as above.
expansion anchors generally speak of metal expansion screws expansion screws anchors use wedge slope to force expansion to produce friction and grip to achieve anchors the screw is threaded at one end and tapered at the other the outer bread is a tin some steel pipe the tin cylinder steel pipe half has a number of notchesput them together into the wall hole and then lock the nut the nut pulls the screw outward the taper pulls into the tin cylinder the tin cylinder is opened so tightly fixed on the wall generally used for guardrail awning air conditioning and so on cement brick and other materials but its fixing is not very reliableif the load has a large vibration may loose so it is not recommended for the installation of ceiling fans
expansion screw anchors consist of screw and expansion tube and other parts the tail of the screw is conical the inside diameter of the cone is larger than the inside diameter of the expansion tube when the nut is tightened the screw moves outward and the cone part moves through the axial movement of the threadand then forms a great positive pressure on the outer surface of the expansion tube and the angle of the cone is very small so that the friction between the wall the expansion tube and the cone is selflocking and then achieves the fixing effect
expansion screwanchors spring anchors are standard parts. they are called spring anchors because their openings are splintered and elastic. spring anchors are used to insert the nut and pad with the sharp angle of the splintered opening to keep the nut from loosening.
the flat washer is also a standard part. its function is to distribute the pressure of the nut evenly across the connected parts.
expansion bolt grades :45, 50, 60, 70, 80
expansion screw material: main austenite a1, a2, a4
martensite and ferrite c1 and c2
45 steel, for important or special purpose threaded connection, can choose 15cr, 20cr, 40cr, 15mnvb, 30crmrsi and other alloy steel with higher mechanical properties.
select different expansion screws according to the actual situation of the wall. generally there are the following kinds of 6×60, 6×80, 6×120, 6×150.
6×60 the total length is 60mm the casing length is 45mm the diameter is 8mm the wall thickness is 07mm the surface is coated with colored zinc screw length 60mm diameter 6mm thread part 35mm the bottom rod hammer 8mm conical the surface is painted zinc plating the nut is octagonal with an outer diameter of 10mm and a thickness of 5 mmthe surface is white zinc plated gasket outer diameter 13mm thickness 1mm inner diameter 6mm surface coated with white zinc the shrapnel is a ring with an outer diameter of 9mm an inner diameter of 6mm and a thickness of 16mm
6×80: the total length is 80 mm, the casing length is 65 mm, the diameter is 8mm, the wall thickness is 0.7 mm, the surface is coated with colored zinc; screw length, nut, gasket, shrapnel as above.
6×120: the total length is 120mm, the casing length is 105mm, the diameter is 8mm, the wall thickness is 0.7mm, and the surface is coated with colored zinc; screw length, nut, gasket, shrapnel as above.
6×150: the total length is 150mm, the casing length is 135mm, the diameter is 8mm, the wall thickness is 0.7mm, the surface is coated with colored zinc; screw length, nut, gasket, shrapnel