There are five families of Henrob self-pierce rivets. Each family is defined by unique geometry and has a range of macro features including head style, stem diameter and stem length. The five groups have been specifically developed to meet different functional requirements and application performances. Rivet type selection
The choice of rivet type for a given application is dependent on numerous performance criteria. A rivet is selected, in conjunction with appropriate tooling, to match the application characteristics such as the examples listed below:
Typical Application Characteristics
Aluminium, Steel, Plastic, Composite
Material - High Ductility
Cold rolled steel sheet, Aluminium Sheet
Material - Reduced Ductility
Hot rolled steel, Extrusions, Castings
Material - Low Tensile Properties
Mild steel, Non Ferrous Alloys, Plastic
Material - High Tensile Properties
HSLA Steel, DP & TRIP Steels
Total Joint Thickness
1mm to 6mm (Steel) 1mm to 10mm(Aluminium)
Mixed Material Combinations
Plastics to Metal, Aluminium to Steel
Furniture, Cabinets, Attachments
Head styles are selected on the basis of either functional requirements or aesthetic appeal. Functional requirements may be:
Head flushness (level with material surface)
Shear, peel and fatigue strength
Locator or mechanical stop
Large bearing surface
Attachment points for secondary parts
Countersunk head benefits:
Flushness on the head side of the joint
Good fatigue resistance
Flat, pan and dome head benefits:
Provides good peel strength, especially in plastics or thin sheet metals Allows good head seating, especially when riveting thick or very hard materials Accentuates the aesthetics of a riveted joint and/or covers surrounding indentation on a Class A surface Special head styles
Special rivet head styles are supplied when there is a need to combine the functions of the self pierce rivet and an additional feature.
Rivet length and stem diameter
Rivet length is always matched to the stack thickness to be fastened. A given rivet length will cover a range of material stacks. Testing is carried out to determine the suitability of the rivet length for the material and thickness range being riveted. Henrob offers rivets in lengths of 4 to 14mm.
There are two standard diameters: 3mm and 5mm. The criteria for selecting the appropriate rivet diameter include:
Required strength of joint
Required robustness of joint
Available access to joining area
Material thickness and hardness
Henrob has a state-of-the-art rivet manufacturing facility that includes in-line wire processing, advanced multi-die forging technology with SPC control and 100% automatic inspection and packaging of finished rivets.
An aggressive R&D effort allows Henrob to offer the largest available range of self-pierce rivets and related products such as threaded studs, T-studs and stand-off location pins in various materials such as steel, stainless steel, aluminium, copper and brass. Dedicated R&D forging capacity facilitates the rapid development of new rivet geometries.
Henrob's rivet design and manufacturing process are certified to TS16949 and ISO14001. Complete batch traceability exists from the production of raw material through to the packaged product.
Henrob | Self Pierce Riveting
Henrob is committed to pushing the boundaries of HSPR technology to new levels. Its philosophy - "an innovator not an imitator" - is realised in a corporate culture based on entrepreneurial and creative flair. We are extremely proud of having in our Henrob family the largest and most talented group of people solely dedicated to self-pierce riveting technology.
Henrob’s philosophy is to design reliable, robust solutions for production. This is achieved with the aid of 3D computer-aided design (CAD) software allowing in-depth modeling of tools and product access studies. Finite Element Analysis (FEA) software is used to ensure adequate life expectancy of components. Design data can be exchanged via the web, e-mail or FTP servers, offering rapid turnaround of rivet joint designs and equipment proposals.
Henrob applications engineers add fastening and assembly expertise to your technical team. After a careful review of your joint and installation needs, they will propose a complete fastener and tool specification suited to your application requirements and production environment. They may even suggest product design changes to allow more efficient assembly.
Whether developing a new product or streamlining assembly of an existing one, you can rely on Henrob's experience and innovation in fastening technology. From standard tools to customised systems, from rivet joint design assistance to automated assembly cells, Henrob can find your optimal solution.
Henrob fastening systems have benefited applications in a wide variety of industries around the world. View our case studies to see how we have helped customers cut in-place costs while improving their assemblies and finished products.
Henrob Self-Pierce Riveting (HSPR) is a cold joining process used to fasten two or more sheets of material by driving a rivet through the top sheet(s) and upsetting the rivet, under the influence of a die, into the lower sheet without piercing it.