What drill and reamer are used to process an empty diameter of 8mmH7?
You can refer to the relevant mechanical processing manual, should have an introduction, I think it should be 7.8 of the drill, 8 of the reamer
Drill with a small bit 2.8mm-4.2mm first, and then use 7.8mm to expand the hole. Then machine reamer 8mmH7. Reaming speed should be slow, small and uniform, add oil lubrication cooling. This can be processed into a qualified 8mmH7 hole.
Drill with a small bit 2.8mm-4.2mm first, and then use 7.8mm to expand the hole. Then machine reamer 8mmH7. Reaming speed should be slow, small and uniform, add oil lubrication cooling. It can be machined into a qualified 8mmH7 hole.A rotary tool with one or more cutter teeth for removing thin metal on the surface of a machined hole; a rotary finishing tool having a straight or spiral blade; used for reaming or trimming.A drill, comprising a cutter rod, a cutter rod tip, tip two is located in a main plane (C - C) on the cutting insert (5, 5 '), the cutting blades (5, 5') have in common second planes (E - E) on orientation the short cutting edge center. The blade forms a point like center, the cutting edge is used to enter the workpiece, and thereby the bit is aligned. Two chip grooves (6, 6 ') are arranged on the cutter bar, and the chip removing slots (6, 6') extend from the tip to the end. In any section along the bar, the flutes are located are diametrically opposed to each other's position in the flat tube, flat tube and two common edge edge in the pipe on both sides of the belt plane (F F) 90 degrees extension, wherein the knife rod has a maximum in the rigid plane. The orientation of the second plane (E E) of the center cutting edge is approximately 90 degrees with respect to the main rigid direction (F F) of the blade plane or the bottom of the cutter bar.
