BHF Fine Boring Heads High precision machining to a close tolerance ITS BORE with high surface quality. These heads enable a fine diametric adjustment as small as 2 μm with a direct reading. BHF MB16-MB40 Diameter Range: 18-63 ø18-23 ø22-29 40 34 16 1 2 9 0 3 8 4 20 1 2 7 6 5 Ø18-23 IHRF 16 Ø22-29 IHRF 20 9 0 3 8 7 6 5 4 BHF MB16-16x34 BHF MB20-20x40 BHF MB16-16x34 BHF MB20-20x40 ø28-38 ø28-38 ø36-50 50 63 25 2 32 1 2 9 0 1 3 8 9 0 3 7 6 5 4 Ø28-38 IHFF 25 IHRF 25 8 4 7 6 5 Ø36-50 IHFF 32 IHRF 32 BHF MB25-25x50 BHF MB32-32x63 BHF MB25-25x50 BHF MB32-32x63 ø48-63 80 40 1 2 9 0 3 8 7 6 5 4 Ø48-63 IHFF 40 BHF MB40-40x80 BHF MB40-40x80 775 775