7mm Expansion diamond reamers (Single Pass / Stroke Honing) with straight shank

Single Pass / Stroke diamond Honing (Expansion reamers) mainly intended for finishing and fine reaming of valve guide hole with wear resistant coating for hard and super hard materials, also they may be used in the reaming of any other through hole, where it is necessary to receive the roughness Ra 1,25-0,63 µm..

Diamond layer on dia.: 0.23mm
Diamond Type: AC32
Diamond Size: 80/63 (U.S. Standard ANSI 170/200)
Type of Operation: Fine Grinding roughness Ra 1,25-0,63 µm.
Accuracy of adjustment: 0.01mm
Tool life 500 ... 10,000 holes depending on the material parts, design of parts, processing modes.

Diamonds parameters specified by Ukrainian Standard for more details read Form and Classification of diamonds