|[General Mechanical Components] - [Fastener & Fitting] - [Bolts]|
GB expansion screws 10 * 90
Expansion screws general said metal expansion screws, expansion of its fixed principle of fixing screws but use a wedge inclination to promote the expansion friction bond strength to reach the fixed effect one is a screw thread, one has a taper. Wrapped in a tin (some steel), metal cylinder (pipe) has a number of half cut, put them together into the wall lay the hole, then lock nut, nut screw pull it out to the taper pull into the tin cylinder, metal cylinder is to open up, so firmly fixed to the wall, are generally used for fencing, awning, air conditioning, in the cement, bricks and other materials fastened, but it's not very reliable fixed, if there is a greater shock load, may occur loose, so not recommended for installation of ceiling fans.
6*60: Total length 60 mm, sleeve length 45 mm, diameter 8 mm, wall thickness 0.7 mm, surface color zinc plated; screw length 60 mm, diameter of 6 mm, threaded portion 35 mm, conical bottom rod 8mm hammer, the surface is color zinc plating; nut outer diameter of 10 mm octagonal, thickness 5 mm, the surface is white zinc plated; gasket outer diameter of 13 mm, a thickness of 1mm, the inner diameter of 6 mm, white zinc plated; shrapnel is an outer diameter of 9 mm, an inner diameter 6 mm, thickness 1.6 mm ring.
Expansion screws by the screw and expansion tube and other components, screw tail cone shape, the inner diameter of the cone is greater than the expansion of tube diameter. When the nut is tightened when the screw moves outward through the axial movement of the thread makes tapered portion moves, and then in the expansion the outer peripheral surface of the bolt composite cable bracket tube forming large positive pressure, combined with a small cone angle, so that the wall.
Performance rating 10.9 high strength bolts, the material after heat treatment, can be achieved:
1, the expansion bolt material nominal tensile strength of 1000MPa grade;
2, the expansion bolt material strong bend ratio of 0.9;
3, expansion bolt nominal material yield strength of 1000 * 0.9 = 900MPa grade
Bolts level of performance is the meaning of international standard, the same performance level of expansion bolts, regardless of the origin of the difference between the material and its performance is the same, the design performance levels can use only.
1, drilling depth: Relevant information on the expanded length of the tube, but I found this deep enough, probably related to the residual amount of debris in the hole in the concrete construction, so you're better off than the length of the expansion tube 5 mm deep about as long as you greater than or equal to the length of the expansion tube, NA me to stay in the ground bolts of length equal to or less than the length of the expansion tube.
2, expansion bolts requirement on the ground that the harder the better, of course, this also depends on the items you need to be fixed by the forces. STRENGTH installed in concrete (C13-15) is five times in the brick body .
3, after the expansion bolt properly installed in the concrete in a M6 / 8/10/12, it's the least desirable maximum static force 120/170/320/510 kg, respectively (Note ah, vibration causes loose bolts