Metal Can Ends/Lid/Ring Production Line Metal Can Ends/Lid/Ring Production Line,Solder Tin Cans Making Machine,Rectangle Can Making Machine,Metal Decorative Square Tin Can Making Machine Zhejiang Golden Eagle Food Machinery Co.,Ltd. , https://www.goldeneaglecanmaking.com
The saw thread is a specialist among thread types
The variety of thread types is vast, and it's easy to see why. If you've ever needed a thread for something more than just a simple fastener, you'll understand how important it is to choose the right one. Each type of thread has been specifically designed for a unique purpose, and while they all serve the same basic function, their geometry and structure make them suitable for different applications. However, one type stands out from the rest — the saw thread.
At first glance, the saw thread might not look like a traditional thread. Its profile resembles the teeth of a saw, which is where it gets its name. But don’t be fooled — this isn't a thread used for cutting. Instead, the saw thread is engineered for specific mechanical tasks, particularly those involving unidirectional loads. Let’s take a closer look at what makes it so special.
One of the most notable features of the saw thread is that its profile is not symmetrical. Unlike other common thread types such as triangular or trapezoidal threads, the two flanks of a saw thread are not equal. This asymmetry is intentional, as it allows the thread to handle forces in only one direction efficiently.
Another key characteristic is the distinction between the load-bearing and non-load-bearing flanks. The load-bearing flank is nearly perpendicular to the axis, allowing it to generate strong axial force and withstand heavy loads. Meanwhile, the non-load-bearing flank has a shallower angle, making it less effective under pressure. This design is ideal for applications where movement occurs in a single direction, such as in lifting mechanisms or screw presses.
Saw threads are commonly used in situations where high loads are applied in one direction. For example, they are often found in lifting jacks, clamping devices, and even in dental implants, where a secure, one-way locking mechanism is essential. In the oil industry, saw threads provide reliable sealing connections due to their ability to maintain tightness under axial force.
There are several types of saw threads available, each with its own specifications. The metric saw thread, also known as the German saw thread, is the most widely used and is standardized under DIN 513-1 to DIN 513-3. It has a flank angle of 3° on the load-bearing side and 30° on the non-load-bearing side, resulting in a total angle of 33°.
Another common variant is the 45° saw thread, which features a perpendicular load-bearing flank and a 45° non-load-bearing flank. There's also an American ANSI version with slightly adjusted angles, and similar standards exist in the UK.
For plastic containers in the packaging industry, a specialized saw thread is used, governed by DIN 6063-1. This version has a steeper load-bearing flank (10°) and a wider non-load-bearing flank (40°), making it ideal for securing caps and lids.
If you're working with saw threads, you’ll need the right tools. That’s where BAER comes in — our online store offers a wide range of taps and threading tools tailored for these unique threads. Whether you're a professional or a DIY enthusiast, we have everything you need to make your work easier. And if you have any questions, our customer service team is always here to help.