discount 70% in 2018-09-21 to 2018-09-23
price: USD$ 15.33
freight :USD$7.00,(Postal parcel)
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Name: expansion rings with ring / expansion bolt
Standard: expansion screws + ring nut
Texture of material：304 stainless steelFor outdoor use, better anti rust properties!
Extended custom: 1 meters of arbitrary length custom
Specifications: M8*80 ring expansion refers to the expansion screw nut with rings M8 with 8*80 (the expansion screw length of 80 mm, excluding ring length)
Please according to the requirements taken!
The working principle and application of screw expansion
The expansion screw to the ground or on the wall of hole, the expansion bolt and nut tightened with a wrench, bolt to go outside, and outside of the metal sleeve is not moving, so the bulk of the bolt under the metal sleeve to be expanded, so that the whole fullness in the hole, the expansion screw pumping out the.
Product use: General for fence, canopy, air conditioning and other fastening materials in concrete, bricks and so on. But it's not very reliable fixed,If the load has a great shock, may loose, therefore it is not recommended for installation of ceiling fan etc..
1. Choose a drill screw expansion pipe of the same diameter and expansion, installation again wall punch in the electric drill, the depth of the hole and the best bolt of the same length, and then the expansion screw hole to knock together, remember:Don't put the nut off, to prevent hole drill deeper into the hole and bolts is not good to take.
2. The expansion bolt tight and loose and then unscrew the nut to tighten the nut feeling 2-3 buckle, then the fixed objects with holes punched in a fixed alignment bolt mounted on the outside of the shim or spring washer to tighten the nut.
As shown in the figure, the screw installation method of sample expansion:
A 10MM diameter hole, install M6 expansion screws, in accordance with the tube diameter hit the wall hole. Two, expanding to all into the wall, as long as the threaded part is long enough, the deeper the more solid part of casing.
NeedBe carefulIs that the expansion screw must be installed on the substrate relatively hard, soft and easy to fall off the place of instability, such as walls of the ash seam.
The expansion screw installation notes:
1, drilling depth: the relevant information on the expansion is the length of the tube, but we found that the construction of the concrete in the hole depth is not enough, may give the residual debris, so you'd better than the expansion pipe length of about 5 mm deep. As long as you are greater than or equal to the length of the expansion tube,So stay in the underground expansion bolt length is equal to or less than the length of the expansion tube.
2、Bore diameter: M6 series hole diameter is 10mm,M8 series hole diameter is 12mm
M10 series hole diameter is 14mm,M12 series hole diameter is 16mm
3, on the ground of the expansion bolt is the harder the better, this will force you to a fixed object. Installed inConcreteThe stress intensity is five times in the brick body.
A 4 M6/M8/M10/M12 expansion bolt in concrete, the correct installation of the maximum static stress, it is 120kg/170kg/320kg/510kg.
Note: the different expansion screws and galvanized stainless steel, the surface will continue to generate a protective film, so even if there is a slight wear, not easy to rust.Support, large price advantages.
Tips: anti-theft door, burglarproof window installed, with 304 stainless steel recommendations, 304 stainless steel is not easy to rust, 201 expansion screw is easy to rust, affect the appearance of rust after. On drilling, generally higher than the expansion screw screw diameter 4mm, for example, expansion screws M6, aperture will play M10, other diameter and so on.