G'day Brian. Our machines have a 2" (50.8 mm)boring bar as standard. These bars will machine bores down to approx 56-58 mm minimum. You need to allow some clearance for swarf removal. We do have a Small bore kit, this is a 1 1/4" (31.75 mm) boring bar for smaller bores, this fits in to our 2" system using reducing bushes etc. If you require more information please email me or go to our website. www.pmtaus.com
