company attend the professional exhibition

Why Choose Delong Company for your Self Drilling Screw, Drywall Screw, Chipboard Screw and Washer

What are fixing screws?Before exploring specific screws, it's important that we take note of the basics first. So, what is a fixing screw? Well, a fixing screw is a specific type of fixture that holds materials together and ensures they stay in a fixed position. Typically, these screws are used to secure installations to floors, ceilings and walls.From erecting a signpost to taking on a fencing project, you're likely to use fixing screws. Essentially, these screws maintain a connection between two structures, meaning that most construction projects that seek to join two structures would be unsuccessful without fixing screws.Fixings as a broader term actually encapsulate different kinds of instruments. Typically, fixings refer to screws, nails, nuts, bolts and special anchors. However, these fixings differ in terms of how they are secured.For example, a nail is usually hammered into a pre-drilled hole, a screw is twisted into a hole with a screwdriver whether it's pre-tapped or not, and nuts and bolts refer to a type of fastener which is used to secure screws and hold them in position for longer.Screws are pretty unique when it comes to their size, shape and head shapes. Depending on the type of fitting, screws may come with a cross-head type for a Phillips screwdriver or a single slot for a flat-blade tool.

The Function of Spring Washers and How to Choose between Spring Washers and Flat Washers?The function of the 

Drywall screws are a common furniture decoration material that is widely used to fix lightweight items on walls. The use of drywall screws can quickly and conveniently complete various home decoration tasks, such as hanging paintings, mirrors, wall mounted shelves, etc.

When it comes to fasteners, ensuring stability and security is crucial. Lock washers play a vital role in preventing fasteners from loosening due to vibration, rotation, or other external forces. In this article, we will explore lock washers, their types, functionality, advantages, and the different applications where they are indispensable.

Self-drilling screws, also known as Tek screws or self-tapping screws, are a type of fastener designed to eliminate the need for pre-drilling pilot holes before insertion. These screws feature a unique self-drilling point with cutting edges that not only facilitate easy installation but also provide excellent grip and stability in a wide range of materials, including wood, metal, and even some plastics.

I need to use self drilling screws shown below to attach something to a piece of metal. First time user of a cordless drill with so many settings. Do I use the drill setting at low speeds or the driver setting and adjust the clutch setting?

 For large metal projects a metal roof screw gun is a life saver as it truly is the right tool for the job.  For smaller projects a cordless drill/diver will work just fine.  Ideal speed range for cordless drill will be under 2,500 rpm and a variable clutch is highly recommended.  You might find lower speeds helpful when drilling into thicker metal and when using Stainless Steel screws to lessen the heat generated from the drilling process and avoid ‘burning’ the self-drilling tip.  Use of a variable clutch makes it possible to achieve a consistent drive without over tightening.  This is doubly important in dealing with roofing screws as they need to be correctly tightened so the EPDM sealing washer is compressed without squeezing out of the sides.

Self-drilling screws are a great tool for quickly and securely joining materials together. They eliminate the need for pre-drilled pilot holes, which makes them incredibly convenient to use in any application. From softwoods to hardwoods, metal to plastic - self-drilling screws can handle it all! This article will explore what self-drilling screws are, why they are used, and how to use them in various materials.

A self-tapping screw forms its own hole and taps its own thread as it is driven into various, different materials. Self-tapping screws are available in just about every type of screw head design available in the market. The most common being the Phillips or slotted head. The tips and threads of self-tapping screws come in a vast array of patterns, depending on the application required.Self-tapping screws are ideal for applications where an item needs regular maintenance and needs constant disassembly and reassembly.  

People often confuse self-drilling screws for self-tapping screws. Self-tapping screws/fasteners tap their own threads, but cannot drill through hard objects like metals. Self-tapping screws require a pilot hole for proper installation, but self-drilling screws, the other hand, don’t require any pilot hole. In terms of likeness, self-tapping screws and self-drilling screws can tap their own threads, but generally, self-drilling screws come with a higher thread count compared to self-tapping screws.

Self-drilling screws should be installed using a variable speed screw gun, (not an impact driver) like the DeWALT DCF622M2 RPMs are critical when driving self-drilling screws. High RPM’S can cause point burnout.   When driving self-drilling screws, do not use too much pressure. Using too much pressure will create too much heat on the screw point and can also cause point burnout. Use just enough pressure to keep the screw steady, push the trigger to the desired rpm, and then push the screw into the material. 

Tek screws or self-drilling screws come with an additional pair of bladed flutes which extends from the threaded portion of the body all the way to the drilling tip.  The purpose of this is to combine the drilling and tapping function onto the same screw, thus eliminating the need to pre-drill pilot holes and tap threads.  Drill, tap and fasten are completed in one go, saving time and money.  The best Tek screws come with various types of surface treatments to cope with the environment and provide weathering resistance to itself and the fastened substrate.Tek screws are popular for many general sheet metal applications like roofing, cladding, and HVAC, etc.Larger Tek screws (No.3 Tek and above) are strong enough to penetrate 12~20-gauge galvanized steel, as well as 3/8” to ½” (10~12.5 mm) structural steel and can be used on various civil and naval engineering applications.

By far the most common questions when using self tapping screws are about the best pilot hole size for a specific self tapping screw size.  Factors such as fastener material, housing material, hole depth, and even temperature must be considered. For these reasons, some degree of trial and error may be needed to find the ideal pilot hole size for your specific application. As a rough guide, a pilot hole should be between the minor diameter and major diameter of the screw thread. For example: a #6 screw (major diameter of threads ~3.5mm, minor diameter ~2.5mm) would typically need a pilot hole of 2.7-3mm depending on the hardness / toughness / density / lubricity of the material.

Fasteners are crucial construction tools that hold materials together and provide the secure connections that you depend on. With millions of fasteners available in all kinds of sizes and materials, it is essential to know which is best suited to your application.The three most common types of screws are self-tapping screws, self-drilling screws and self-piercing screws. Each design offers unique benefits that make it ideal for different materials and uses. Read on to determine which type of fastener is a match for your requirements.

Understanding the way to use self drilling screws is comparatively straightforward. These screws are simple to control once you recognize the fundamentals, yet accuracy continues to be important to keep up a top-quality finish and well-completed task.In the best way of using a self-drilling screw, you will create pilot holes, which can ensure your screw is aligned to the opening perfectly. The pilot hole should be slightly smaller in diameter than the diameter of the screw. Instead, the screw’s thread will not be ready to catch effectively.

As their name implies, self-drilling screws operate on the same principles as drill bits and other cutting tools. For any cutting tool, performance is governed by cutting speed, feed rate, depth of cut and the work material itself. Therefore, installation performance of self-drilling screws can be linked to the basic cutting tool parameters. Suggested optimal parameter values are listed by nominal screw size in the table below.

First, decide on the correct type of screw for the desired substrate to be fastened. Mark the precise position where the screw will be used and ensure you have ample room to use a screwdriver or drill machine.Usually, it helps, but is not always necessary, to drill a pilot hole slightly smaller in diameter than the actual screw size. This allows for the screw body to fill the drilled cavity and the threads to cut into the material as it is screwed in. Be careful to use a drill bit slightly smaller than the self-tapping screw, otherwise, the threads won’t have anything to bite into as it turns in.Position the screw straight in line with the hole and turn it in, one or two turns, by hand. This allows the screw to be left in the hole as you pick up your screwdriver or drill machine. Using firm short movements, screw the self-tapping screw in place using a Phillips or flat head screwdriver or drill bit. Ensure that the self-tapping screw goes in straight, and do not over-tighten it as this could cause the head to strip.

Self-tapping screws are designed to cut their own screw threads as they are screwed into a material. There is no need to create a screw thread in a pre-drilled hole as the self-tapping screw does the work as it is screwed in.Self tapping screws are generally made from carbon steel or stainless steel in a variety of screw types such as pan head and countersunk. There are also specialist types such as self tapping screws specifically designed for use in concrete, brick or mortar.