Screw threads come in different shapes that determined by their angle and sizes. This article introduces knuckle thread with its form, uses, angle, standard, drawing, and dimensions chart specified by DIN 405 and DIN 20400. What Is a Knuckle Thread? The Knuckle thread, also called round thread or RD thread, is a special type of screw thread form known for their smooth, rounded shape. Unlike most threads that have sharp edges, knuckle threads have big, curved crests and roots. This unique design creates plenty of space between the thread parts, which helps dirt, dust, and other debris mov......

Have you ever wondered how to make sure your screws go in smoothly without damaging the material? That’s where a pilot hole comes into play. Pilot holes are a fundamental part of many manufacturing and assembly processes. They help ensure that parts fit together accurately and securely. When you are working on a woodworking project or assembling complex machinery, drilling an accurate pilot hole for your project can make a significant difference in the quality of your work. So before you drive in the fastener, make sure to know what size pilot hole to have precision holes for your......

The thread geometry is defined with different sizes in various standards. As a classic thread system, Unified Series includes UNC, UNF, UNR, and UNS. In this article, we’ll introduce the basics of UNS threads (designation meaning, reading, full form, angle, standard, and fit classes) and list the UNS thread chart with the dimensions (diameter, pitch, TPI, and tap drill sizes) specified in ASME B1.1. What Is a UNS Thread? – UNS Thread Meaning and Full Form The UNS thread, with the full form being Unified Special Thread, is a designation from one of the major screw thread systems now......

Keyed connections are achieved by cutting keyways on the shaft and hub and inserting a component called a “key”. Although small in size, the shaft key plays a significant role in mechanical transmission. A key is a mechanical element used to fix rotating shafts and gears. It is primarily used to transmit torque by securing components circumferentially on the shaft. Some keys also provide axial fixation or allow for axial movement, such as the connection between gears and shafts in reducers. While not a prominent part, keys are crucial in power transmission. So today, letR......

How much torque is required for a bolt? To save time for calculation and variation, a torque value table is useful. In this article, we’ll share the metric and imperial bolt torque chart with you, and also introduce torque measurement, calculation, and the differences between torque and tension. What Is the Bolt Torque? A bolt is a fastener that consists of a shaft and a head. The shaft features both threaded and unthreaded portions. The bolts often work with matching nuts to form a joint for holding two parts together. The main types of bolt joints are tension joints and shear joints. B......

Today, let’s get into the fascinating world of centerless grinding – one of the precision grinding processes in CNC manufacturing. You know, if you’ve ever found yourself needing to get a super precise finish on a cylindrical part, but it doesn’t have any centers, it’s for you. Or if you’re, you know, looking to really boost your production of those round components. This remarkable grinding process seems pretty straightforward on the surface, but it delivers really impressive results. Stick with us today; we’re going to explore this remarkable ......

The bolt fasteners are available in different designs to suit some specific purposes. A type of bolt with a special shape is a U-bolt. In this article, let’s understand the U-bolt with its structure, materials, types, installation steps, and size chart. What Is a U Bolt? The U-bolt is one of the bolt types, it refers to the fastener in the shape of letter U and have screw threads on both ends. U-bolts consist of a curved body with two straight, threaded arms extending downward, which allows the secure fastening of nuts and washers. The specific shape is used to clamp objects tight......

5052 is one of the alloys that can be CNC machined and used as components for aircraft, marine, and some other industries. To understand this material, here is an introduction to 5052 aluminum, along with its designation, characteristics, composition, properties, tempers, and comparison with other aluminum grades. What Is 5052 Aluminum? 5052 aluminum is an aluminum-magnesium alloy that primarily consists of aluminum, magnesium, and a small amount of chromium. The designation 5052 comes from a standardized naming system developed by the Aluminum Association, which assigns a four-digit cod......