La oferta termina hoy.Obtén un 30% de descuento en cualquier curso (excepto paquetes).
Termina en --- --- ---
Mensajes del foro
Cursos
Blog
Artículos de tecnología
Discusión y preguntas relacionadas con el curso Fundamentos de compuestos en deportes de motor
= Hilos resueltos
Hey guys, just chasing some opinions here.
I’ve had a set of rods resized recently (big end bores ~47 mm). After machining they were left to cool and stabilise, then measured in a ~20 °C room. Measuring with a bore gauge, they’re consistently coming up about 4-6 microns undersize, with one rod closer to 8 microns under. Shape-wise they look good - no obvious taper or ovality issues.
I’ve measured the crank and a set of new bearings and, on paper, the clearances should still end up in spec. That said, before I go and sacrifice a set of bearings to measure installed ID, I wanted to sanity-check this with others.
At this level of undersize, is there any real concern around bearing crush or distortion, or is this generally considered a non-issue in practice? Just trying to work out if I should send them back now, or whether this is well within safe tolerance.
Appreciate any thoughts or real-world experience. 👍
That's well within spec for most rods in terms of variation anyway. 0.0002" is half of the acceptable spread set by most OE's and bearing manufacturers. OOR and Taper are much more important. Also, you don't have to throw out a bearing if it only has a faint line from the bore gauge, they're still fine to use as long as there's no gouging you can feel.
