R8 to 3MT Sleeve

I was skeptical about swapping tooling, but this sleeve fits snugly with zero runout—the hardened steel really holds up under heavy cuts. It’s saved me from buying a whole new set of collets for my mill.

The tolerances on this are spot on—my 3MT collet chuck seated firmly with zero wobble on the first try. Hardened finish feels solid and should hold up fine on the bench mill, and it does exactly what it promises.

Finally got around to installing this on my mill and the hardened finish feels solid—no slop when seating a 3MT drill chuck. The precision grind is spot on, and it’s saved me from buying a whole separate spindle setup.