The Cogsdill External Roller Burnishing Machine (available in CX-2000 and CX-3000 models) roller burnishes cylindrical diameters of any length in seconds. Parts are sized, finished, and work-hardened by highly polished, precision rollers in one quick pass. Fatigue life, corrosion resistance, and appearance are enhanced as parts are accurately sized and finished.
All ductile or malleable metals with hardness up to R/C 40 can be roller burnished. Cylindrical parts of any length, bars, tubing, wire, and stranded cable may be processed with self-contained, self-feeding roller burnishing machines.
- CX-2000: Heavy-duty, high-production machine ideally used where size or portability is a factor. Features variable frequency drive with digital speed display and economical fixed speed model options.
- CX-3000: Heavy-duty, high-production machine designed for permanent installation on the production floor. Available in two sub-models: CX-3000-1 for part diameters from .045 to 1.004 inch (1.15 to 25.50 mm), and CX-3000-2 for part diameters from .963 to 2.504 inch (25.46 to 63.60 mm).
- Accurate Sizing: Tolerances within .0001 inch (.0025 mm) are attainable, depending on variables such as material type, hardness, pre-machining method, and finish prior to burnishing. A prepared tolerance of .002 inch (.05 mm) can usually be reduced by 50% (.001 inch / .02 mm).
- Low Micro Finishing: One pass can quickly reduce a 20-40 microinch Ra (0.5 to 1.0 micrometer) ground surface or an 80-120 microinch (2-3 micrometers) Ra turned surface to a mirrorlike 5 microinch (.125 micrometer) Ra finish or lower.
- Work Hardening: Surface hardening is achieved simultaneously with sizing and finishing, yielding increases in surface hardness of up to 3 points on the Rockwell "C" scale for certain materials. Extends wear life, improves corrosion resistance, reduces fatigue failures, and reduces friction.
- Appearance Improvement: Machined parts (turned or ground) are burnished to lustrous, mirrorlike finishes. Removes surface patterns and blemishes from prior machining operations, improving subsequent plating applications.
- Fast Processing: Processes parts in seconds at speeds up to 30 feet/minute (9.14 meters/minute). Eliminates time-consuming and expensive finishing operations such as grinding or lapping.
- Sub-Assembly Options & Operating Modes: Operates in interference or compensating modes, available for through-feed burnishing or with an adjustable stop-and-release mechanism.
- Sub-assembly "A": Interference through-feed
- Sub-assembly "B": Interference to a stop
- Sub-assembly "C": Compensating through-feed
- Sub-assembly "E": Compensating to a stop
CX-2000 Machine Dimensions
Race Assembly & Diameter Ranges
- CX-1 Race Assemblies (CX-2000 & CX-3000-1): Adjustable in increments of .0001 inch (.0025 mm) over a range of .021 inch (.53 mm) for each nominal size. Diameter range: .045 to 1.004 inch (1.15 to 25.50 mm).
- CX-2 Race Assemblies (CX-3000-2): Adjustable in increments of .0002 inch (.0051 mm) over a range of .041 inch (1.04 mm) for each nominal size. Diameter range: .963 to 2.504 inch (25.46 to 63.60 mm).
Speed and Feed Recommendations (Starting Reference)
Note: Feed rates are based on using a stationary cage (part free to rotate with anti-spacer installed). If using a thrust bearing where the part does not rotate, feed rate is approximately 1/2 of the indicated value.
