Roll-a-Finish Selection and Operation Guide
30Pages

Roller burnishing overview Cogsdill Roll-a-Finish tools offer you a fast, clean, and economical method of sizing and finishing metal parts to exacting specifications. The tools can be operated on any spindle. Parts of virtually any configuration and material are accurately sized within “tenths,” with surface finishes as fine as 2 micro-inches (0.05 micrometers)... in seconds! An additional benefit: roller burnishing work hardens the part surface, producing a dense, compacted, wear-resistant surface for longer part life. Parts are improved, with faster production, and at a lower cost. size finish work harden in seconds! 2

Burnishing TOOLS & MACHINES Universal Burnishing Tools Bearingizing Tools Turning-Holder Style Boring-Bar Style External Roll-a-Finish® Tools CX® External Roller Burnishing Machines Internal Roll-a-Finish® Tools We are pleased to offer the widest array of standard burnishing products in the industry, supported by the broadest range of experience in application engineering and custom tool design. Let us provide you with burnishing solutions to meet your sizing and finishing needs, with Diamond Burnishing Tools faster production and at a lower cost. COGSDILL TOOL PRODUCTS, INC. Burnishing...

roll • er burn • i • shing defined Roller burnishing overview Roller burnishing is a surface finishing technique in which hardened, highly polished steel rollers are brought into pressure contact with a softer piece part. As the pressure generated through the rollers exceeds the yield point of the piece-part material, the surface is plastically deformed by cold flowing of subsurface material. The result is a mirror-like finish and a tough, work-hardened surface with load-carrying characteristics which make the burnished surface superior to finishes obtained by abrasive metal-removal...

diamond CX external roller burnishing machines burnishing ■ Inside diameters (holes) ■ Outside diameters (shafts) ■ Flat surfaces ■ Tapers ■ Spherical surfaces and contours ■ Fillets (radii at shoulders) Standard Roll-a-Finish tools are available from stock for inside diameters from .187 to 4.000 inches (4.75 to 101.6mm), and for outside diameters from .062 to 2.000 inches (1.57 to 50.8mm). The tools are easily adjustable over a typical range of up to .040 inch (1.02mm). Special designs are available for larger and smaller diameters, and for tapers, faces, contours, and virtually any part...

Cogsdill Tool Products, Inc. SR Series Internal Roll-a-Finish® tools Our premier line of internal Roll-a-Finish® tools, designed to suit all applications. Ideal for applications where tool length is restricted by tool changers, turrets, etc. Offered in three styles: ■ Through-hole style with nohelix cage (machine-feeding) ■ Through-hole style with helix cage (self-feeding) ■ Bottoming-style for blind hole, with no-helix cage (machinefeeding) ... with up to four ■ ThroughHole (No Helix) work lengths: Two inch (SR) Four inch (SR-4) ■ Six inch (SR-6) ■ Eight inch (SR-8) ... and available from...

Cogsdill Tool Products, Inc. U series Internal Roll-a-Finish® tools For hole diameters from 2.500 to 4.000 inches (63.5 to 101.6mm). Work length is unlimited; extension adapters can be used to increase work length. Offered in two styles: ■ Through-hole style with helix cage (self-feeding) ■ Bottoming-style for blind hole, with no-helix cage (machinefeeding) ... and available ThroughHole (Helix) from stock. Note: Also available from stock in through-hole, no-helix style. 12 Bottoming (No Helix)

Cogsdill Tool Products, Inc. Bearingizing tools The Bearingizing Tool combines roller burnishing with peening action. As the tool is rotated at a high speed the rolls spin, rise, and fall over a cammed arbor, delivering up to 200,000 rapid fire blows per minute to the work surface. The peaks and valleys of the machined surface are compacted into a smooth, hardened, and ultrafine The Bearingizer may be the tool of choice where the following conditions exist: ■ Parts with thin walls — Bearingizing eliminates barrel-shaping of the part. ■ surface finish. Parts with irregular wall thicknesses —...

Bearingizing tools Selection & ordering information To select a tool for the part and material to be Bearingized, determine the proper tool build-up. The build-up is the effective tool diameter required to produce a certain size in a given material. It is measured with the rolls diametrically opposed on the high surfaces of the cam. The build-up is equal to the maximum finished hole diameter plus a spring-back allowance — see chart. The maximum diameter (high side of tolerance) is used to allow for tool wear and still maintain part size within tolerance limits. Cam diameter Build up...

Bearingizing tools Operation & maintenance Machines Any machine capable of rotating the tool — e.g. drill press, speed lathe, or turret lathe — may be used. Material Any ductile or malleable material — powdered, laminated, cast, forged, extruded, sintered or hardened (maximum Rc 38) can be bearingized. Steel, stainless, alloy, cast iron, aluminum, copper and brass are examples. Procedure Proper part preparation is essential in order to obtain precise results. Cogsdill will recommend the surface preparation and amount of stock to leave for Bearingizing, but some trials may be required to...

Cogsdill Tool Products, Inc. External Roll-a-Finish® tools AEX series For burnishing the outside diameter of cylindrical parts, such as shafts rotating in bushings or bearings. Provides an ideal surface for grease and oil seals. AEX-1 Available from stock for nominal diameters from .062 to 2.000 inches (1.57 to 50.8mm) Offered in three ■ styles: AEX-1, with a smaller body diameter and shorter overall length suitable for screw machines and automatics. All AEX-1 tools are bottoming-style, designed for machine-feed. Available for nominal diameters from .062 to .625 inch (1.57 to 15.88mm). ■...