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Pins

A wrist pin, also known as a piston pin, is an important component in an internal combustion engine. It is the critical link between a piston and connecting rod, and is continually exposed to extremely high loads in alternating directions and it is also subjected to shearing and bending forces from the connecting rod.

Taking all these parameter in consideration, CP-Carrillo offers a wide variety of wrist pins to fit different applications and uses. Below is a selection of different materials and treatments available.


Chromoly Bar Stock Pins

CP-Carrillo 5100 Series Pins are an affordable alternative Wrist Pin

  • 1 micron surface finish
  • Case hardened (computerized gas process)
  • Gun drilled I.D.’s
  • Precision ground ends
  • Made from Carbon Steel bar stock
  • Available with chamfered ends for wire locks
  • Straight wall design to reduce pin bore galling

9310 Steel Pins

These high quality Pins are ISO 9000 and QS 9000 certified and statistical process control (SPC) is fully implemented throughout manufacturing

  • 100% Rockwell tested
  • Case hardened (computerized gas process)
  • Gun drilled I.D.’s with 3 stages of I.D. honing
  • Weight tolerances +/- 1 gram
  • Precision ground ends with I.D. radius
  • Straight wall design to reduce pin galling on ends
  • Available with chamfered ends for Wire Locks
  • Cryogenically treated (subzero heat-treating process) for improved material strength and grain structure

Diamond-Like coated pins (DLC)

CP-Carrillo’s Diamond-Like coated Premium Pins are manufactured from high quality 9310 steel. Our metal-free carbon coating is harder than steel, ensuring a durability unsurpassed by any other coated pin on the market today. They are ISO 9000 and QS 9000 certified, ensuring consistency, quality and performance. They offer high resistance to abrasive wear, extend the service life and improve reliability under extreme conditions that push other coatings to their limits. When performance and durability are required, these pins offer that competitive edge you are looking for.

  • Enhanced surface hardiness
  • Improved surface quality
  • Low friction coefficient
  • 100% Rockwell Tested
  • 1 Micron surface finish
  • Case hardened (computerized gas process)
  • Gun drilled I.D.’s with 3 stages of I.D. honing
  • Weight tolerances +/- 1 gram
  • Precision ground ends with I.D. radius
  • Cryogenically treated (subzero heat-treating process) for improved material strength and grain structure

Ceramic Micro-Dimpled pins

CP-Carrillo’s Micro-Dimpled finish pins offer affordable wear protection. This unique treatment process refines and compacts the pin’s surface texture, making it harder and more durable. The improved surface texture allows more consistent lubrication, reducing friction and decreasing chances of wrist pin galling. Available in both our 5100 Chromoly and 9310 pins, these pins are perfect for every budget -and application.

  • Strengthened surface structure
  • More durable, harder and consistent finish
  • Micro-Dimpling holds lubricant better
  • 1 Micron surface finish
  • Case hardened (computerized gas process)
  • Gun drilled I.D.’s
  • Weight tolerances +/- 1 gram
  • Precision ground ends
  • Available with chamfered ends for use with Wire Locks
  • Straight wall design to reduce pin bore galling