Straight Shank Roller Burnishing Tools

Cogsdill roller burnishers employ a cold-working process which produces a fine surface finish. Hardened and highly polished rolls apply a steady rolling pressure against the work surface. As the rolls rotate under pressure, they cold roll the peaks flowing the metal into the valleys. The roller burnishing pressure required depends on the ductility and tensile strength of the material and the surface roughness before burnishing. Any change in size can only occur within the limits of the surface roughness, (peak-to-valley depth). Parts produced from any machinable material can be brought to size fast with the Burnishing tool. Any standard spindle driven machine may be used. Size control is built into the tool with diameter adjustment in increments of one or two tenths depending on tool size. The precise size can be quickly attained with simple manual adjustment and maintained throughout long production processing operations. The Burnishing tool works metal without cutting or abrading the surface. It moves the metal, smoothing and compressing the peaks into the valleys, generating a dense and uniform surface - friction free and leaving no residue or feathered edges. Processing time is seconds as compared to minutes for grinding, reaming, honing or lapping operations. During the extremely fast cycle time for part sizing and finishing, the work surface is also being work hardened and strengthened. Surface hardness increases from 5% to 10%. The low micro finish substantially increases part wear life and corrosion resistance . . . the added strength improves fatigue resistance, decreasing part failures.Internal Diameter given is Nominal. Each roller burring tool can be adjusted within the following ranges:\tNominal Size\tAdjustment\t(mm)\tMin\tMax\t4.0 - 5.75\t-0.03\t0.25\t6.0 - 12.5\t-0.05\t0.50\t13.0 - 50.0\t-0.10\t1.00