The security door is called the "security door." It has both theft and security performance. In accordance with the "General Technical Conditions for Anti-theft Security Doors," the qualified security doors can be opened within 15 minutes using a Chisel, screwdriver, crowbar and other Hand Tools, hand drills and other portable power tools, or a 615 square millimeter opening on the door leaf. Open, or open a 38mm2 opening in the 150mm square half of the locking point. The lock used on the security door must be a dedicated lock with anti-drilling function that has passed the detection of the Ministry of Public Security testing center. Security doors can be made of different materials, but only when they meet the standard test standards can a security door be called a security door. >>> Related Links: Security Doors Purchase Four Standards At the time of purchase, it can be decided based on personal preferences and economic conditions. Specific attention should be paid to the following: (1) Consumers should select the appropriate anti-theft security door according to the actual requirements such as the size of the door opening, the opening direction, and the color pattern. (2) Anti-vandalism function is the most important function of anti-theft security door. Upon purchase, the seller can be required to show the inspection certificate of the relevant department. The product quality should meet the technical requirements of the National Standard GB17565-1998 "General Technical Conditions for Anti-theft Security Doors". (3) The thickness of the steel plate of the qualified anti-theft security door frame shall be 2mm or more, the thickness of the door body shall be generally more than 20mm, and the weight of the door body shall be inspected. Generally, the weight of the door body shall be 40kg or more, and the cat's eye, doorbell box or lock handle may be removed. Check the internal structure of the door, the door plate thickness should be more than 1.0mm, there are several reinforcing steel bars, so that the front and rear panels of the door organically linked together to enhance the overall strength of the door, the door is best asbestos and other fireproof As a filling material, the insulation, sound insulation, and material are used to knock on the door to make a "click" noise. Consumers should flexibly open and close the door by hand. (4) Check the quality of the process: special attention should be paid to checking for any welding defects such as open, unwelded, missing welds, etc. See if the cooperation of the door leaf and the door frame is dense, whether the gap is uniform, whether the opening is flexible, and whether all the joints are dense, the surface of the door panel should be treated with antiseptic treatment. Generally, the surface of the door panel should be painted and sprayed, and the surface of the paint layer should be free of bubbles, uniform in color and large in size. Most doors also have rubber seals embedded in the door frame, and no harsh metallic impact sound is emitted when the door is closed. Brand shop: security door Doors buy security door wardrobe brand paint home
Spade bits are used for rough boring in wood. They tend to cause splintering when they emerge from the workpiece. Woodworkers avoid splintering by finishing the hole from the opposite side of the work. Spade bits are flat, with a centering point and two cutters. The cutters are often equipped with spurs in an attempt to ensure a cleaner hole. With their small shank diameters relative to their boring diameters, spade bit shanks often have flats forged or ground into them to prevent slipping in drill chucks. Wood Spade Drill Bit,Fat Drill Bit,Paddle Drill Bit,Wood Drill Bit Behappy Crafts (suzhou)Co.,Ltd , https://www.behappyindustry.com
Some bits are equipped with long shanks and have a small hole drilled through the flat part, allowing them to be used much like a bell-hanger bit. Intended for high speed use, they are used with electric hand drills. Spade bits are also sometimes referred to as "paddle bits".
Spade drill bits are ordinarily available in diameters from 6 to 36 mm, or ¼ to 1½ inches.
Decoration essential: security door selection guide
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