HZ-40 Centrifugal Barrel Finisher

HZ-40 Centrifugal Barrel
Finishing Machine

The Most Popular Entry-Level Centrifugal Barrel Tumbler for Precision Part Manufacturers

The HZ-40 is Mass Finishing’s best-selling centrifugal barrel finisher—and the machine most manufacturers start with when they’re moving from hand finishing to automated centrifugal processing. At 47″W x 38″D, it fits into production cells and lab environments that can’t accommodate full-sized industrial equipment, but it delivers finishing capacity and force that benchtop machines cannot match.

What sets the HZ-40 apart from the smaller HZ-12 is both capacity and versatility. With four interchangeable barrel configurations—two-sided, bolted-end, latched-end, and half-latched—the HZ-40 adapts to different part geometries, material sensitivities, and batch sizes without requiring a second machine. That flexibility is why it’s become the standard entry-level centrifugal barrel tumbler for additive manufacturing post-processing, medical implant finishing, and precision machined components.

Additive manufacturers use the HZ-40 to deburr and surface-finish 3D-printed metal parts—removing support material residue, smoothing layer lines, and preparing surfaces for downstream coating or inspection. Medical device companies rely on it for implantable and surgical components where consistent surface quality is a regulatory requirement, not a preference.

Machine Type: Compact
Max Part Size: 11″ L x 5.5″ D
Barrel Dimensions: 12.5″ L x 6.875″ D
Popular Industries: Additive Manufacturing, Medical & Surgical, Precision Part Manufacturers

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What Makes the HZ-40 the Go-To Centrifugal Finishing Machine for Precision Parts

The HZ-40 occupies a specific position in the HZ-Series lineup: it’s the largest compact centrifugal barrel finisher Mass Finishing makes, and the smallest machine that offers four distinct barrel types. That combination of size, capacity, and configurability makes it the most frequently purchased model across all industries we serve.

With 1 to 1.42 cubic feet of total barrel capacity (depending on barrel type) and parts up to 11″ long and 5.5″ in diameter, the HZ-40 handles components that are too large for the HZ-12 but don’t require the 2+ cubic-foot capacity of the HZ-60 or larger. It’s the right machine when your parts are small to mid-sized and your production volumes range from R&D prototyping to moderate serial production.

Variable frequency control gives operators precise speed adjustment—lower RPMs for delicate polishing of plated or coated surfaces, higher RPMs for aggressive deburring of as-printed metal or machined steel. The HZ-40 accepts both 230V and 460V three-phase power, with single-phase available on request for facilities without three-phase service.

HZ-40 Features and Benefits

Four barrel configurations

No other compact centrifugal barrel finisher offers this range of barrel options. Two-sided barrels accept dividers for part separation. Bolted-end barrels handle high-pressure applications. Full-size latched-end barrels maximize capacity. Half-size barrels let you run 8 isolated compartments for delicate or mixed-alloy batches.

Compact enough for cell manufacturing

The 4’ x 3’ footprint fits into additive manufacturing post-processing cells, medical device production lines, and CNC machining departments. It rolls in next to your printer or lathe without requiring a dedicated finishing room.

3X the capacity of the HZ-12

The jump from 12 liters (HZ-12) to 40 liters of total capacity means you can process more parts per batch or handle parts up to 11″ long—covering surgical instruments, additive-manufactured brackets, and mid-size precision components that won’t fit in a benchtop machine.

Consistent, validatable results

For medical device and aerospace manufacturers, process consistency isn’t optional. The HZ-40’s controlled parameters—speed, cycle time, media type, compound concentration—produce repeatable finishes batch after batch, supporting FDA and AS9100 quality documentation requirements.

Isotropic surface finishing

The HZ-40 produces finishes that are uniform in all directions—no directional tool marks or polishing lines. For 3D-printed metal parts, this means layer lines and staircase artifacts are replaced with a smooth, omnidirectional texture that improves both function and appearance.

Safe, interlocked operation

Hood lock prevents access during cycles, and two-button jog ensures deliberate barrel positioning. These aren’t add-ons—they’re standard on every HZ-40, which matters in regulated manufacturing environments where machine safety documentation is required.

HZ-40 Barrels

The HZ-40 is the only compact centrifugal barrel finisher in the HZ-Series that supports four distinct barrel configurations. This versatility is one of the primary reasons it’s the most popular model for manufacturers running mixed-part environments—you can switch barrel types in minutes to match the application without changing machines.
A second set of barrels allows continuous operation: load and prepare one set while the other runs, which can effectively double your throughput.

Two-Sided Barrel (Aluminum or Steel)

The only HZ-40 barrel option that accepts removable dividers for creating separate compartments within each barrel. Medical device manufacturers processing mixed batches—different implant sizes or alloy types—use two-sided barrels to prevent cross-contamination and part-on-part contact. Heavy-duty cam locks with safety lock pins keep lids secure under high centrifugal loads. Available in aluminum (lighter, easier to handle) or steel (more durable for abrasive media and aggressive cycles).

Bolted-End Barrel

Designed for high-pressure applications where cycle intensity and media weight demand a more robust seal. The bolted hardware withstands repeated heavy-duty use without loosening—making this the preferred barrel for aggressive deburring of hardened steel, titanium, and as-printed metal parts where support structure removal requires maximum force.

Latched-End Barrel (Full-Size)

The highest-capacity barrel option at 12.5″ L x 6.875″ D, with snap latches for the fastest lid removal. Best for production environments where batch volume matters more than part separation—high-volume finishing of uniform parts like machined fittings, fasteners, or 3D-printed components that are structurally robust enough to tumble together.

Latched-End Barrel (Half-Size)

Two half-barrels fit per cradle (8 total), giving you the most compartments of any HZ-40 configuration. Each half-barrel is light enough to lift in and out of the machine easily. Ideal for small, high-value parts—spinal screws, dental implant components, jewelry pieces—where every part needs isolation during processing.

HZ-40 centrifugal machine media and compounds

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HZ-40 Recommended Accessories

Processing Table

Collect processing water and easily clean out sediment
Reduce the mess from the finishing process
Sludge tank can be sold separately

Vibratory Media Separator

Dump full barrels onto vibrating screen deck to quickly separate parts from tumbling media
Removable wire mesh screens for different part sizes
Custom screens also available

PLC Touchscreen

Store processes as recipes for easier operation
Replaces the analog cycle start buttons
Allows for better monitoring of machine use and time
Maintenance reminders programmed in based on hour meter

Extra Barrels

Dramatically reduce downtime on the machine
Load and unload the second set of barrels while the machine is running

Additional HZ-40 Specs & Resources

Main Motor Hp	3 HP Leeson Brand (or comparable brand) Totally Enclosed Fan Cooled (TEFC)
Voltage	230/460 Three Phase, 60 hertz (Single phase available upon request)
Total Capacity	1-1.42 cubic feet
Variable Speed Drive	Allen Bradley PowerFlex 525 (or comparable brand)
Approximate Shipping Weight	1300 lbs.
Overall Dimensions	47″W x 38″D x 49″H
Machine Construction	Heavy duty steel All welded construction Reinforced, gusseted, and welded to maximum strength
Barrel Construction	Various size barrels available (See Below) Removable lids Lined with polyurethane 1/4” min. thickness Entire barrel can be removed from machine to load/unload media and parts.
Control Panel	NEMA 12 enclosed panel UL Certification (Available upon request) Allen Bradley buttons and switches 0-100 Hour cycle timer mounted on standard panel Digital RPM meter with potentiometer adjustment Power jog of turret
Brake	Automatically stops the turret when a stop is activated or the cycle is completed Activated if the door is opened
Barrel Options
Two-Sided Barrels	Can use dividers Non-removable liners Inner Dimensions- 9.8″ x 5.7”
Bolted-End Barrels	Inner Dimensions- 11″ x 5.875″ Heavier Duty with Removeable Liners
Latched-End Barrels (Full Sized)	Inner Dimensions- 12.5” x 6.875” Highest Capacity with removable liners
Latched-End Barrels (Half Sized)	Inner Dimensions- 5.5″ x 6.875″ 8 Total with Removable Liners (2 per cradle)

: An MFI customer HZ-40 set up with Processing Table and Tank along with a Media Storage Rack.

: An MFI customer HZ-40 set up with Processing Table and Tank along with a Media Storage Rack.

: An MFI customer HZ-40 set up with Processing Table and Tank along with a Media Storage Rack.

: An HZ-40 next to an HZ-120 in a production setting.

: An HZ-40 installed in a 3D printing cell.

Barrel Type	Empty	Ceramic Media	Plastic Media
Two-Sided, Aluminum	17	23	20
Two-Sided, Steel	24	30	26
Half-Size, Latched End	12	23	20
Full-Size, Latched End	24	49	43
Bolted End Barrel	24	40	36
HZ-12 Latched End Barrel	12.5	21	19

Free Standing Media Separator	Industrial media and parts separator Dump fully loaded barrels onto vibratory screen deck to easily extract smaller parts from media 110 V Single Phase power requirement
Work Station and Sludge Tank	Constructed of 1/2” P.V.C. and Anodized aluminum frame Includes three compartment sludge tank mounted on casters for easier mobility 72” L x 32” D x 58” H (With Backsplash)
Electric Hoist	L-Shaped jib arm with Manual Swivel Bolted on with Brackets 110 Volt power requirement Allows operator to lift barrels out of the machine with the push of a button
Media Screen Kit	Simple bucket with 5 different size separating screens Screen sizes: ¼”, 3/8”, ½”, ¾”, 1” Separate parts from the mass of media by shaking bucket
Media Drain Basket	Industrial bin with metal screens in the bottom Ideal for draining water and solution from media and parts
PLC Controller	Horner Electric EXL6 Store recipes and processes and gain access to machine diagnostics
Barrel Dividers	Made from NYLOIL® A cast nylon with built-in oil lubrication Provides superior machinability, performance, and durability compared to other plastic. Available on Two-Sided, Side Load barrels only
Light Tower Indicator	Visual indicator of machines status Can be customized to match existing equipment
Infrared Safety Light Curtains	Disables machine if curtain is broken while door is open during loading/unloading Added layer of safety
Media and Compound	Required for running parts MFI Stocks all consumables used in testing process Media ships in 50- or 55-pound quantities Pricing Varies Depending on Type
Centrifuge Module CF55 SD Series Microseparator™	Clean and process effluent from tumbling process Processed wastewater is safe to send to drain or be used in a recycling system. Solids are collected through centrifugal action of rotor via a reusable liner Watch the video
Media Storage Rack	Keep media out of the way when not in use Industrial powder coated steel construction Made to fit 12 MFI gray media bins

HZ-40 vs. HZ-12: Which Compact Centrifugal Barrel Finisher Is Right for You?

	HZ-12	HZ-40
Total Capacity	12 liters (0.42 cu ft)	40 liters (1–1.42 cu ft)
Max Part Size	8″ L x 4.5″ D	11″ L x 5.5″ D
Barrel Options	2 (full-size and half-size latched)	4 (two-sided, bolted, full latched, half latched)
Power	120V single phase	230/460V three phase (single phase available)
Best For	Dental labs, jewelry, small medical components	Additive post-processing, medical implants, precision machined parts, mixed-part operations

Choose the HZ-12 if your parts are small (under 8″), your volumes are moderate, and your operation runs on single-phase power—typical of dental labs, jewelry workshops, and small medical device cleanrooms.

Choose the HZ-40 if you need more capacity, more barrel flexibility, or your parts exceed the HZ-12’s size limits. The HZ-40 is the better starting point for additive manufacturing post-processing, precision machining shops, and medical manufacturers who anticipate scaling production.

Not sure which model fits? Send us a sample part or share your dimensions and throughput goals—we’ll recommend the right fit.

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