SPIROL manufactures two types of Slotted Spring Pins: SPIROL Standard Slotted Pins and ISO 8752 Slotted Pins. SPIROL Standard Slotted Pins offer significant advantages as compared to ISO 8752 Slotted Pins, which were originally designed to function as Dowel Bushings. Dowel Bushings are used in conjunction with bolts and isolate bolt threads from shear planes.

Conversely, SPIROL Standard Slotted Spring Pins were designed to perform one of the following pinning functions without the addition of any other fastener: hinge, alignment, retention, stop, or hub/shaft connection. While both SPIROL Standard Slotted Spring Pins and ISO 8752 Slotted Pins can be effective in an assembly, SPIROL Standard Slotted Spring Pins are easier to install and superior in form, fit, and function.

More advantages of the SPIROL Standard Slotted Pins include >

• Slot width narrower than the wall thickness, thus preventing the pins from nesting or interlocking.
• Smaller expanded (pre-insertion) diameter which results in lower insertion force and smoother insertion.
• Rounder pins, which in turn results in better conformance of the pin to the hole wall and eliminates the edge of the slot damaging the hole during insertion.
• Lower stress in the spine of the installed pin. This results in longer pin life in shock or fatigue applications.
• Ability to use automatic vibratory feeding of pins for installation without interlocking.
• Plating of pins for additional corrosion resistance or appearance without “touch marks” or the bonding of nested pins.

Whilst both pins are of great quality and a high standard, the SPIROL Standard Slotted Spring Pins have a few extra advantages that make this product an asset to any assembly. SPIROL’s application engineers will work alongside your design to make sure that you are using the most effective and efficient fastening solutions in your product.