Rotary barrel tumbling machines are the oldest way of surface finishing. Yet, it is still widely used because of its low cost. Barrel sizes available are 140X2L, 300X2L, and 500X2L.
Inovatec Machinery · Vibratory Finishing
Inovatec’s Double Barrel Rotary Tumbling Machine give smooth surface finishes, fast deburring, and reliable results for every batch. Below is real performance data and before-and-after comparisons from our industrial customers.
Before AfterProcess Specs
Parts Material | Processing time (min) | Media Type | Media Wear Rate | Ra before | Ra after | Material Removal | Consistency | |
Stainless steel (304) | 50 minutes | GC ceramic media ACT 15X15mm (3/4 inch) | 0.5% per hour | 1.0 | 0.18 | < 0.3% | ±1% Surface Uniformity |
Consistent Results: The Double Barrel Rotary Tumbling Machine delivers uniform surface finish quality from batch to batch, ensuring stable and reliable results in production.
Low Damage Rate: With gentle tumbling action in two independent barrels and properly matched media, the Double Barrel Rotary Tumbling Machine reduces part-to-part impact and helps protect small or delicate components.
High Repeatability: Digital controls and simple program settings help the Double Barrel Rotary Tumbling Machine maintain cycle-to-cycle consistency, typically within ±1% under identical processing conditions.
Real Industrial Testing: The Double Barrel Rotary Tumbling Machine is proven through 1,000+ finishing tests across different metals, part sizes, and geometries.
Process Tracking: Each Double Barrel Rotary Tumbling Machine can record cycle time, media type, and key process parameters for easier quality control and repeatable finishing results.
Detailed specifications for our DM series Double Rotary barrel tumbling machines. Compare models and download comprehensive technical documentation.
| Model | Capacity | Size | Motor | Speed | Lining Thickness |
| (L) | L x W x H (mm) | (kw) | (rpm) | (mm) | |
| DM140X2 | 140X2 | 2570X850X1267 | 3 | 40 | 10 |
| DM300X2 | 300X2 | 3000X1300X1450 | 4 | 30 | 10 |
| DM500X2 | 500X2 | 3870X1150X1420 | 7.5 | 25 | 10 |
The DM double barrel series uses the same rotational tumbling principle as the single-barrel DM series — the defining difference is the dual-barrel configuration driven by one motor. Two barrels run simultaneously at the same speed, each operating as an independent processing chamber. This is the primary reason to choose the double barrel over running two single machines: throughput per motor, per floor space, and per operator doubles without doubling capital cost.
Both barrels are driven by a single motor through a shared drive shaft, so they always rotate at the same speed. Each barrel is independent in loading and unloading — the operator can run different part types or process stages in each barrel simultaneously, or run the same parts in both for higher batch volume per cycle. Barrel sizes are DM140×2 (140 L per barrel, 40 rpm), DM300×2 (300 L per barrel, 30 rpm) and DM500×2 (500 L per barrel, 25 rpm). The double configuration covers a practical range from workshop batch testing to production-volume finishing in a single machine.
Both barrels are hexagonal cross-section with 10 mm cast PU lining throughout. The hexagonal geometry creates the consistent lift-and-drop tumbling action that is the DM series' key process advantage over round barrels. The 10 mm PU lining protects parts from metal-on-metal contact with the barrel wall and absorbs vibration noise. Speed decreases with barrel size — DM140×2 at 40 rpm, DM500×2 at 25 rpm — maintaining the correct tumbling action across all capacities.
All DM double barrel models include a digital process timer with auto-stop, allowing unattended overnight operation. A safety cover prevents access to the rotating barrels during the cycle. An optional Siemens touch screen PLC controller provides programmable recipes — up to 50 programs covering different part types, speeds and cycle times — for production environments where multiple operators need to run consistent repeatable processes without manual parameter setting. The optional Bosch Rexroth VFD allows independent speed adjustment for wet (higher speed) and dry (lower speed) processes.
The DM double barrel series provides two independent processing chambers on one machine — the most cost-effective way to run two simultaneous barrel tumbling processes without two separate machines. Both barrels rotate at the same speed from a single shared drive, but each barrel loads, operates and unloads independently. This lets the operator run two different part types, two different media combinations, or the same parts split across two barrels for higher batch volume per cycle.
The gentle rotational tumbling process is the same as the single DM barrel series — this is the right machine when part quality takes priority over cycle speed, particularly for thin stampings, delicate parts, parts with holes, and long or sensitive components where vibratory action would cause damage. Cycle times are typically 1–8 hours, significantly longer than vibratory finishing, which is the trade-off for the gentler action.
Rotary barrel tumbling machines are the oldest way of surface finishing. Yet, it is still widely used because of its low cost. Barrel sizes available are 140X2L, 300X2L and 500X2L.
In barrel tumbling process, the rotary drum rolls the mass in the barrel and parts get the desired surface. 2 barrels are driven by one single motor with the same speed. Therefore, you can deburr different parts lots at the same time.
The double barrel machines are available also in Hexagonal shape and also Olive shape.
Feature:
Application:
Watch our Surface finishing process in action. Learn more about our Surface finishing process technology.
Our mass finishing machine and tumbling media serve diverse industries with specialized finishing solutions for various materials and part types.
Engine components, transmission parts, brake systems
Turbine blades, landing gear, structural components
Fasteners, connectors, precision tools
Post-processing, surface refinement, finishing
Inovatec Machinery stands out as a trusted partner in surface finishing solutions, offering unmatched quality, innovation, and customer support.
Since 2003, we've been at the forefront of surface finishing technology, continuously innovating and improving our solutions based on real-world manufacturing needs.
We understand that every application is unique. Our engineering team works closely with you to design and configure machines that perfectly match your requirements.
With partners and service centers worldwide, we provide localized support and rapid response times regardless of your location.
We value your time. Our technical team responds to inquiries within 24 hours, ensuring you get the answers and support you need quickly.
Benefit from our expertise at no cost. We offer complimentary technical consultations to help you optimize your finishing processes and select the right equipment.
Over 500 satisfied customers across 50+ countries trust Inovatec for their surface finishing needs, with a 99% customer satisfaction rate.
Explore real applications by industry and scenario, with Before/After, sub‑categories and resources to help you quickly find what you need.
Jewelry | Precious Metals | Jewelry Polishing
Precision polishing, deburring and mirror finishing for gold, silver, copper and titanium jewelry—balancing premium surface quality with throughput.
Burrs on edges, surface scratches and oxidation spots reduce luster and wearing comfort.
Noticeably improved mirror gloss with rounded edges and better wearing comfort.
Additive Manufacturing | SLA/SLS/FDM
Removes layer lines, densifies surfaces and unifies appearance for 3D‑printed parts across materials and processes.
Pronounced layer lines, support marks and rough surface affect assembly and appearance.
Smooth, refined surface ready for painting/electroplating; presentation‑grade look.
Sheet Metal | Laser Cutting | Edge Optimization
Removes dross/burrs and adds edge radiusing on laser‑cut parts to improve safety and assembly quality.
Sharp, burred edges can cause cuts and hinder coating adhesion.
Consistent rounded edges and clean surfaces for better paint/e‑coat adhesion.
Consumer Electronics | Small Appliances | Exterior Parts
Delivers consistent texture and feel for high‑volume consumer products, improving brand perception and yields.
Uneven brushing, micro‑burrs and harsh feel affect assembly and user experience.
Uniform texture, smooth edges and refined touch; markedly better consistency.
Stone | Gemstone | Tumbling
Rounds edges and enhances gloss on natural/synthetic stones for jewelry and decorative crafts.
Sharp edges, rough surfaces and uneven color/reflection.
Rounded edges and even polish; improved visual appeal.
Automotive | Engine/Drivetrain | High‑volume Consistency
Deburring, edge radiusing and surface consistency for automotive parts to meet stringent standards.
Tool marks and residual burrs with sharp edges reduce fatigue strength and hinder assembly.
Stable edge radii and compliant roughness with high repeatability.
Defense | High Reliability | Process Consistency
High‑reliability, consistent surface finishing across metals and composites.
Sharp edges, stress concentrations and surface defects impact durability and safety.
Consistent chamfers and stable surface quality; coating/assembly‑ready.
Aluminum Profiles | Die‑cast Parts | High‑volume Finishing
Efficient, consistent finishing for aluminum parts; ideal for pre‑anodizing treatment and brushed/polished appearance.
Gate/flash marks and dull surfaces; notable batch variation.
Flash removed with refined texture and higher brightness; improved batch consistency.
Engineering Plastics | Injection‑molded Parts | Deflashing
Removes plastic flash and smooths edges to prevent scratching and improve assembly.
Visible flash and sharp edges affect feel and assembly.
Flash removed and corners smoothed; improved look and feel.
Enhance your mass finishing machine and tumbling media with our professional-grade accessories. Increase efficiency, reduce noise, and optimize your finishing process.
Get the most out of your mass finishing machine and tumbling media with our comprehensive accessory package. Our experts will help you select the right combination of accessories for your specific application needs.
Accessories designed to maximize machine efficiency and output quality
Reduce operational costs through improved efficiency and reduced waste
All accessories designed for seamless integration with your existing machine
Inovatec Machinery is committed to the highest standards of quality, safety, and reliability.
Quality Management System certified by international standards, ensuring consistent product quality.
European Conformity marking ensuring our machines meet EU safety standards.
Comprehensive testing and inspection reports from SGS.
Environmental protection standards compliance.
Since 2003, Inovatec Machinery has been at the forefront of surface finishing technology innovation.
Our machines are trusted by manufacturers worldwide and recognized at major industry exhibitions.
Regular participation in major industry exhibitions worldwide.
Strategic partnerships across major manufacturing regions.
Find answers to common questions about our products.
This machine is designed for mass finishing of small to medium-sized metal, plastic, or ceramic parts. It’s commonly used for deburring, polishing, descaling, edge rounding, and surface smoothing. The dual barrel design allows for two different processes to run simultaneously or for increased throughput.
The double barrel is more cost-effective than two single machines when: you need two simultaneous processing chambers and want to minimise floor space, capital cost and the number of separate machines to maintain; both chambers will always run at the same speed (the shared drive cannot be independently controlled); and the two barrel sizes you need are both covered within the DM140×2, DM300×2 or DM500×2 range.
Choose two separate single DM machines when: you need to run the two barrels at different speeds (e.g., aggressive deburring in one while dry polishing in the other); you need to be able to stop or adjust one barrel independently of the other; or the barrel sizes you need are different (e.g., one 100 L and one 300 L).
For most small-to-medium factory applications where both barrels process the same or similar parts, the double barrel delivers better value per square metre of floor space.
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399# Shushan Road, Wuxing District, Huzhou City, Zhejiang Province, 313000 China
6317 Arcadia St, Eastvale, CA 92880 USA (323-577-3309)
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