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Connecting Rod Manufacturing and Finishing

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How Racing Engine Parts Are Made! CP Carrillo Factory Tour & Behind The Scenes (Rods & Pistons)

What happens here

Connecting rods are often machined from steel forgings. A significant portion of the material is removed during a 'profiling' operation to achieve the general shape, followed by boring processes to prepare the rods for subsequent assembly. The grain flow in forged steel rods is crucial for strength and controlled during the forging process. In contrast to pistons, connecting rod production can involve more operations, especially for steel rods, due to the need for fasteners and other intricate features. After machining, connecting rods undergo processes like deburring and honing to achieve precise dimensions and smooth finishes, followed by washing and inspection before approval for delivery.

Goal: Manufacture connecting rods, including profiling, boring, and finishing operations.

Tools and materials

  • CNC Vertical Milling Machines N/A — Profiling and boring operations on connecting rods
  • Deburring Tools N/A — Removing sharp edges from machined parts
  • Honing Machines Sunnen — Achieving precise internal diameters for connecting rod bores
  • Aluminum Connecting Rods — Alternative material for connecting rods, offering a more cost-effective option for certain applications
  • Steel Connecting Rod Forgings N/A — Raw material for high-strength connecting rods

What they say

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let's go see all the rods get done with the connecting rod we actually start the operation down the street and that's where our forging so all our raw and finished materials are in the other building and basically we we do some boring processes over there so that we can prepare to put them on the machines over here so these machines are all doing a similar thing we refer to it as profiling which takes the majority of the material off of the connecting rod and gives it the general shape that you're looking for here's one prior to and here's one after so when you hear Ford's drive versus cast Rod when you go to force Rod it starts as one of these slugs well forged Rod versus a Billet Rod too right so the thing that we try to pride ourselves on is the fact that everything we do is forged so we actually get the grain flow to go the way that we want it to go uh Billet Rod has a straight line ring and ours don't so it's a hundred percent machine so when it's done you can't tell the difference between a fill it and a forged Rod but these are like Billet Force rods it's 100 machine support yes and that's different than either one of the other things you've got them combined here yeah so uh that's the way it's always been uh and then we also manufacture aluminum connecting rods now um there is this for like a Pro Stock deal or something oh that's actually an import you got a lot of rods going right now though the the rod side you know as the industry was up and down and you know we were coming back from a pandemic uh we're fortunate enough to be very busy in a nice to have industry right so um we're thriving we're having record months finally it's slowing down a little bit on the Piston side the rod size still pretty hectic I think we're 14 weeks or so for a set of connecting rods and we're down to about five weeks for Pistons right now so oh wow um what are those itty bitty rods for uh it might be for like a Hayabusa like a little motorcycle racing so this is some of the area where the the final boring is done some rods actually get serration on the party line so that they are stuck together and that way some are sleeves some are serrated a variety of different methods that we use we have some reverse entry connecting rods like that where the bolts come in from the top and then the majority of them this is a bullet connecting rod I don't remember if you have these or yours or not I think that's what I will have in the six liter for the Yukon okay yeah so similar…

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