For additional technical information or to make arrangements for free sample part finishing contact: Dave Davidson, Deburring/Finishing Technologist. ddavidson@deburring-tech-group.com | dryfinish.wordpress.com


Guest column by Mike Klein, Chief Technical Officer, Iso-Finishing Inc.


CENTRIFUGAL BARREL FINISHING.

Centrifugal Barrel Finishing (CBF) is a high-energy finishing method where Centrifugal Barrel Machines are used. A great example of this type of machine is the HZ Series. These machines are typically made up of four individual barrels (or drums) mounted on the outer edge of a turret. The turret is rotated in one direction, causing the barrels to rotate in the opposite direction creating very high G-forces or pressures, as well as considerable media sliding action within the drums. The movement mimics that of a ferris wheel. This action is due to either a Timing Belt, V-Belts or Chain that is connected between the main shaft and the centerline of the four barrels. In operation, this turret rotation creates a high centrifugal force. This force compresses the load into a tight mass causing the media and parts to slide against each other removing burrs and creating a superior finish. Short cycle times are realized because of the high centrifugal energy being applied to the parts.

What is the Difference Between Wet and Dry Barrel Finishing?  Wet barrel finishing is a batch system for removing excess material or polishing parts, employing water and other agents to form radii, remove burrs, improve surface appearance, polish and clean. Wet barrel finishing works well for processing metal. Wet barrel finishing equipment may sometimes be used in dry tumbling operations.

Dry centrifugal barrel finishing is a batch system for mass polishing or removing excess material from plastic or metal parts without liquids by tumbling them in a media and compound mixture. This process is valuable for finishing very delicate parts that would be damaged in a wet barrel. A dry system produces a smoother and higher finish. The finished parts have more of a hand-buffed appearance with greater uniformity. The result is something very difficult to do with hand finishing methods.

Although most methods for barrel finishing employ a wet process, dry tumbling has some definite advantages in particular cases. Some factories are not set up to handle large quantities of water, making wet tumbling impossible. Dry tumbling may be used under such circumstances to eliminate hand finishing. ISO Finishing is set up to handle any type of process your job requires.

What types of materials can I process in these machines?  Any type of material can be deburred, polished, or refined in a CBF including: Titanium, Gold, Silver, Zinc, Aluminum, Brass, Steel, Stainless, Pewter, Beryllium, Barium, Cadmium, Vanadium, Copper, Nickel, Zirconium, Tungsten, Iron, Tin, Vasco x-2m,9310, M50, Vim-var, Bismuth, Palladium, Yttrium, Niobium, Magnesium, Manganese, Scandium, Osmium, Plastics, and Glass.

Can I Run Multiple Parts in One Barrel?   Yes, in most cases you can put several parts per barrel, depending on size and material. At times when parts are not allowed to come into contact with another; in these situations, depending on type of equipment, parts can be segregated by using divided compartments available with our machines, or a type of fixturing device that will hold the parts in a fixed position.

How much does it cost to process my parts?  Obviously, the cost will differ between projects, but we encourage you to take advantage of our free sample processing services to determine your cost. It is really easy to do, just give us a call or fill out and submit our free sample part processing form.  We will process a few of your sample parts for you and then return them to you with a fully detailed cost analysis and process report.


From Small to Large Components.   
ISO Finishing specializes in Centrifugal Barrel Finishing and we are able finish an extended range of sizes:

• From 3 Cubic Millimeters
• Up to 9″ wide x 9″ high x 41″ long

Centrifugal Barrel Finishing Machine Sizes.  CBF Machines available from ISO Finishing vary in size from the compact, table-top HZ-12 to the super-sized HZ-330. No matter the size, these machines are built for heavy use with industrial ball bearings and hot poured polyurethane barrel liners that can stand up to the wear of running repeated finishing cycles.
Entry-Level Centrifugal Barrel Finishing Machines

The HZ-12 and HZ-40 models make-up the compact line of CBF machines. They feature smaller, removable barrels. The HZ-12 is popular in the dental industry because of its smaller stature. It works well in small places like dental labs, and packs the same high-end finishing punch of its bigger brothers. By purchasing a second set of four barrels, the operator can run one set of barrels while they are loading and preparing another. This can dramatically reduce downtime on the machine.

Mid-Size Centrifugal Barrel Finishing Machines.  The HZ-60 and HZ-85 provide more than double the capacity and efficiency over the smaller tumblers. Each machine features a wide barrel that can be divided into several chambers to aid in avoiding part impingement.

Full-Size Tumbling Machines
From the HZ-120 with its stout and long barrels to the HZ-160, these full-sized industrial finishing machines can handle just about any type of part imaginable. The HZ-160 features a 15 horsepower motor with 1.5 more cubic feet of barrel space than the HZ-120. For jobs that require a bigger barrel or a greater overall volume, the HZ-160 offers a great solution. These CBF machines can be fully customized with a touchscreen control panel, barrel lid-lifting system, parts separator, drain pan and infrared safety curtain.

Super-Sized Tumbling Machines.  The HZ-220 CBF Machine is a significant jump in size. With barrels that are over two feet wide, this machine can handle larger parts and volume. The HZ-330 is a monster of a machine that has been used a variety of select applications. Download Super-Size Machines.

ISO Finishing Precision Processing.  We have worked with manufacturers in industries ranging from medical and aerospace to firearms and OEMs to carry out finishing services and create finished products. These unique industries and their products require attention to the finest of details—and yield virtually no room for error.

Our process includes several steps to ensure parts and product reliability:

Custom Development Strategy.   There is no magic here—it’s precision. We customize each finishing process to fit our clients’ needs from start to finish. At the end of the day, we specialize in you. Our centrifugal barrel services are ideal for parts from 3mm³ to up to 9” x 9” x 41” and are custom-tailored for each specific component.

Samples & Quality.  We formulate a process for each product and provide our clients with finished samples at no charge. Collaboration with the customer is key. If something needs improvement, we’ll use the client feedback to adjust the process—not the standard. The result is a customized, consistent, and repeatable set of specifications for finishing your unique product.

Advanced Technology.  We continue to add state-of-the-art machinery, media and inspection equipment to adapt to the industry’s latest advances. Our methods have exceeded expectations by providing a better finishing quality and faster turnaround times than are typically possible in-house or as an outsourced operation.
ISO Finishing works on products made of all types of materials. Contact us today at 1-509-563-9859 or email me at ddavidson@deburring-tech-group.com for creating surface perfection on your manufactured parts.

Contact us directly at ddavidson@deburring-tech-group.com or text, WhatsApp or call my mobile: +1.509-563.9859

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