#Rivet types widening manual#
To achieve this precision holes are drilled to the desired tapping size and then internal threads are applied using a manual tap and wrench or a semi-automated tapping tool on our Radial Arm drill. Tapping is the process of forming threads in a hole to prepare it for a fixing. Parts that are cut on our HD plasma can have the holes countersunk for an additional charge. Countersinking is used in a variety of applications.
CountersinkingĬountersinking is the process of widening the diameter of a hole and creating a sinking angle to allow the head of the countersunk bolt, screw or rivet to sit flush with the surface of the material when it is placed in the hole. The tooling enables a wider range of hole and slot sizes, that are not dependant on the thickness of the material. The CNC programming allows us to produce drilled, milled, and countersunk holes and slots in any type of steel section or plate. The CMA drill we use has a bed of 4.5m x 600mm but we can rotate the material on the bed to accommodate up to 9m x 600mm wide & 300mm high. You will be quoted for the most efficient & cost-effective way to create the holes or slots for your project. Punching is much quicker than drilling or milling.ĭepending on the size of the part, along with the thickness & grade of the material, it may be more suitable to have parts plasma cut instead. The shape that is punched out does not have to be a circle – many different punch designs are also available. Hole diameters less than the plate thickness must be drilled. The punched hole diameter must be greater than the plate thickness.
A great option if only a limited number of holes are required and are not needed to be of as high quality as a drilled hole.Ī punch uses sheer force to mechanically push through the metal and is best for working with thicker materials. We punch holes and slots in aluminium, stainless and carbon steel plates. Sometimes another process will be required to form the holes or slots, capabilities of the plasma cutter are great for cutting mild steel because the system uses a function called TrueHole, this process allows us to cut bolt-ready holes of a diameter of 0.7 x thickness of the material eg. If we are cutting profiles in-house then it is often possible to draw in the positions of the holes or slots on the flat pattern so they can be cut by the plasma, this does depend however on the thickness of the material. Making holes through punching, drilling or using the plasma cutter are all viable processes and are selected depending on the need, time scale and equipment availability for each project.
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