These shell mill arbors are hardened steel tool holders designed to securely mount large, hollow-center face mills onto CNC or manual milling machine spindles (1/2", MT2, MT3 and R8). Large DiameterShank SizeFit Cutter Bore Size & Capacity
22mm
1/2"
1/2" x 1"
40mm
1/2"
3/4" x 1"
50mm
1/2"
1" x 1"
50mm
MT.2
1" x 1"
40mm