The slotted pins defined in the DIN 1471 standard published by the German Institute for Standardization (DIN) have three longitudinal taper grooves that expand the diameter of the full-length tapered groove pin. The expanded diameter is pressed back to the nominal diameter when inserted into the straight hole. As the pin tries to expand to a larger diameter, the force against the wall of the hole tightens the fit. This creates holding power against shock and vibration.
Similarly, the ISO 8744 standard published by the International Organization for Standards (ISO) describes the specifications of full-length tapered grooved pins made of steel or austenitic stainless steel, having three equally spaced grooves on their outer surface, ranging from 1,5 mm to 25 mm (inclusive) in length (ISO 8744 Grooved pins - Full-length tapered grooved). The material shifted on either side of the grooves, creating an extended diameter larger than the nominal diameter, causes a non-positive locking fit when these grooved pins are forced into a drilled hole equal to the nominal diameter.
Requirements for full length conical splines are included in the DIN 1471 standard under the following headings:
Stainless steels for DIN 1471 spring lock washers are divided into three groups: austenitic, ferritic and martensitic. Austenitic steel is by far the most common type (more than 90 percent of commercial fasteners). Steel groups and strength classes are indicated with four-digit letters and numbers as shown in the table in the standard. The DIN EN ISO 3506 standard contains the requirements for screws and nuts made of stainless steel.
Our organization, among the numerous tests, measurements, analyses, and evaluations it provides for businesses in various sectors, also offers testing services for full-length tapered pins under the DIN 1471 standard and full-length tapered pins under the ISO 8744 standard, thanks to its trained and expert staff and advanced technological equipment.
To get an appointment, to get more detailed information or to request an evaluation, you can ask us to fill in our form and reach you.
