jacob rohre fasteners Germany jacob rohre models jacob rohre prices

jacob rohre fastener studs are a type of fastener used in sheet metal, thin plates, chassis, and cabinets. During connection, one end must be screwed into a part with an internal threaded hole, while the other end passes through a part with a through-hole, and then a nut is tightened, firmly connecting these two parts into a single unit. This type of connection is called a stud connection and is also a detachable connection, mainly used when one of the connected parts has a large thickness, requires a compact structure, or is frequently disassembled, making bolt connections unsuitable. The press-fit nut stud has a hexagonal shape at one end and a cylindrical shape at the other, with an undercut groove between the hexagonal section and the cylindrical section. Its interior features internal threads. By using a press to insert the hexagonal head into a pre-drilled hole in the thin plate, plastic deformation occurs around the hole, forcing the deformed material into the undercut groove of the press-fit nut stud, thereby riveting it securely to the thin plate and forming an effectively fixed internal thread on the thin plate.

jacob rohre fastener applications

A stud refers to a cylindrical fastener with threads on both ends. It is used in main bodies of large equipment where accessories need to be installed, such as sight glasses, mechanical seal seats, gearbox frames, etc. In these cases, one end of the stud is screwed into the main body, and after installing the accessory, a nut is placed on the other end. Studs are used when the thickness of the connected bodies is substantial, and double-ended bolts are used for anti-loosening purposes. In actual work, external loads such as vibration, changes, and high-temperature creep of materials can reduce friction, causing the normal pressure in the thread pair to disappear momentarily, resulting in zero friction and loosening of the threaded connection. If this happens repeatedly, the threaded connection will become loose and fail. Therefore, anti-loosening measures must be taken. Studs are applied in different usage environments and are widely used in power, chemical, refining, valve, railway, bridge, steel structure, automotive and motorcycle parts, machinery, boiler steel structures, tower cranes, large-span steel structures, and large buildings.

jacob rohre fastener installation

Studs save time and cost as no drilling, punching, threading, riveting, screwing, or finishing steps are required for all structures, continuously expanding the application potential of structural design, high current, and smaller melt depth. Therefore, they can be welded onto very thin plates. The workpiece for stud welding must be welded from one side. It can be welded in all positions, and with the help of an extender, it can be welded on restricted vertical partitions. Due to short-time welding and minimal post-weld deformation, no trimming is needed. Since the welded structure does not require drilling, there will be no leakage. The joint can achieve high strength, meaning the strength of the stud weld joint exceeds the strength of the stud itself. How to install double-ended bolts with good economic efficiency. Compared to other welding methods, the advantage lies in welding power. For mass-produced workpieces, standard studs are low-cost, and stud welding has a high quality reproduction rate and a lower defect rate.

jacob rohre fastener maintenance

During each maintenance, newly replaced studs and other newly replaced components should be inspected. The inspection should focus on the head and guiding part of the stud, strictly checking each part of the thread for cracks or indentations, and examining whether the tooth shape of the stud has changed. Check if the pitch is abnormal; if any abnormalities are found, the stud must not be used again. When installing the connecting rod cover, a torque wrench should be used. Tighten according to the specified standards, ensuring the torque is neither too large nor too small. Also, pay attention to selecting bolts and studs from matching manufacturers. Therefore, regular maintenance of studs is necessary. Under long-term mechanical friction, studs may develop issues. When problems occur, the engine oil pan should be removed, and the condition of the engine bearings should be carefully checked. Check if the gap between the bearings is excessive; if so, replace them promptly.

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