Threads can create the same stress concentrations, producing the related types of stress risers, which may result in fractures. The typical machine and pipe thread has a profile that is based on a "V" type notch.

Another consideration, at least on external threads, is the parting line—Protolabs will always place it lengthwise down the exact center of the thread, essentially cutting the mold into two equal halves. As discussed, there will be some undercutting of the thread form, unless you opt for a side-action mold, in which case some slight flashing can occur where the different mold sections come together. Again, it’s not much, but designers should always know what to expect before committing to a manufacturing solution. Use of Inserts for Internal-Molded Threads Adjustable Feet Our range of adjustable feet are ideal for office furniture, point of sale products and catering equipment.The Tapered Plug is used to plug the end of tubing, pipes, and bars. Tapered Pipe Plugs are desiged to fit snugly on to the end of a tube to keep liquid, dirt and other ingres out of the cavity - or indeed to help retain the contents that is within. Alternatively, Cap Plugs can be used as Tapered Caps. The Tapered Cap fits neatly over the outside diameter at the end of a tube, pipe or bar. This prevents dirt, dust, moisture, liquids and other contaniments from entering the cavity opening during manufacturing, masking, storage, and transportation. Some of the benefits, to mention just a few are that these thread covering caps are easy fitting, easy removal and easy handling. They feature an easy grip head to allow for fast and efficient screwing on and off of the application. These vinyl caps provide a high-gloss, attractive finish making them ideal for use as decorative end caps. The flexibility and durabilityallowssuitable fit for multiple applications. They can be used as a mask for coating, plating and paint applications, where the maximum temperature is not higher than 350F. Many plastic piping system installers who encounter problems with splitting assume Schedule 40 fittings are weak. They conclude that the problem can be solved by switching to "stronger" Schedule 80 fittings. There are several fallacies in this reasoning. Some manufacturers produce Swing Joints with an alternate style of thread profile called "Buttress" threads. They promote the slanting notches of their threads as adding strength. The truth is these "Buttress" threads still have a "V" notch at the root of the thread profile that consequently make it sensitive to bending loads. The strength of these fittings is still substantially reduced.

Between 75% to 85% of all hydraulic hose failures are caused by contamination, such as dirt, dust and moisture, which in turn cause corrosion.1 Contaminants can enter and circulate within the system at any point – even before the part is installed on machines. An end cap with threads protects components from these threats.Tear Tab Caps also assist in the protection of tube and pipe ends during transportation and storage. They protect parts from damage, dirt, moisture and other forms of ingress. These caps are highly versatile, and ideal for a range of applications and different threads, including; BSP, GAS, UNF, JIC and NPT. Spacers All of our spacers are manufactured in nylon 6.6 and are suitable for a variety of industrial applications. Control Knobs Our control knobs are available in a choice of materials and are widely used on gas appliances and catering equipment. A sealing compound must be compatible to plastics. Many brands of pipe sealant contain oils, solvents or carriers that can damage plastic. A proper sealant must be certified by the manufacturer to be harmless to the fitting material and to not contaminate fluid in the pipe.

To cut glass, a notch is scratched into the surface. The notch produces a high stress concentration or stress riser, which is indicated by the red area in the diagram above. Applying a bending load will break the glass along the stress riser or notch.Drawer Slides Our drawer slides come in sizes ranging from 250mm to 700mm. Perfect for filing cabinets and other office furniture. Aside from the issues discussed so far, success with plastic injection molding requires designers to follow the “best practice” rules covered in other Protolabs design tips, and threaded parts are no exception: Vices for holding pipe during thread cutting and pipe wrench should be designed and used in such a manner that the pipe is not damaged. Strap wrenches are recommended. Wooden plugs can be inserted in to the end of the pipe if needed to prevent distortion of the pipe wall.