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VMT is a CNC machining and manufacturing factory for various electronic equipment casings. With 16 years of experience in CNC machining electronic housings and various types of CNC electronic housing samples, you can send pictures to view and view the factory online, contact us immediately to obtain samples. We can provide you with various types of electronic product casing machining services to meet your customized CNC machining needs.
Product Specification:
VMT provides custom CNC machining for metal tattoo pen housings, bodies and motor housings based on your drawings, assembly interfaces and cosmetic requirements. From motor bores and thin walls to threads, mating features and anodized surfaces, we coordinate DFM review, CNC turning, milling, finishing and inspection from prototype validation through repeat production.
Tattoo pen designs vary in motor layout, drive structure, wall thickness, adjustment mechanism and external appearance. VMT machines custom metal housing components from customer drawings rather than supplying standard tattoo pen parts.
Main body housings form the primary metal structure around the motor and drive system. CNC turning controls the main ID, OD and shoulders, while secondary milling creates customer-specific openings and external features.
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Motor housings locate and support the motor within the assembly. Machining focuses on motor bores, locating shoulders, shaft clearance and the dimensional relationships required for predictable installation.
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Integrated bodies combine multiple structural and locating features into one component. DFM focuses on deep bores, thin walls, internal access and the machining sequence needed to control critical relationships.
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Segmented housings may use threaded, stepped or locating interfaces between body sections. Thread fit, axial position and cosmetic alignment are reviewed together with the planned surface finish.
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Drive section housings can contain bearing seats, guide bores, internal shoulders or side openings. Turning and milling are coordinated around the functional interfaces defined in the customer drawing.
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Rear housings and end caps may combine concentric profiles, internal threads and connector-side features. Machining is planned around mating geometry, orientation and the final cosmetic requirement.
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Housing designs around an adjustable-stroke mechanism may require controlled rotating relationships, internal clearance and stable mating geometry while maintaining a consistent external appearance.
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For customer-specific cylindrical, stepped, lightweight or multi-feature housings, machining methods are selected after reviewing geometry, material, tolerances, surface finish and production volume.
Request a QuoteWe build the machining route around the features that control final assembly: the motor bore, main housing axis, internal shoulders, threads, secondary openings and cosmetic surfaces. Our precision CNC machining capability can reach ±0.005 mm for suitable critical dimensions, machined surface roughness can reach Ra 0.2 μm where required, and critical features are checked through the machining and finishing sequence rather than only at final inspection.
Motor and drive misalignment often starts when turning and milling use unrelated references, so we establish the main axis first, carry that datum into later operations and verify bore/runout relationships where required; suitable critical dimensions can be controlled to ±0.005 mm after engineering review.
Deep internal material removal can make a lightweight cylindrical body move under clamping or residual stress, so we separate roughing and finishing, control clamping force and check critical diameters during IPQC before the housing reaches surface finishing.
Long tool reach can create chatter, poor shoulder definition or hidden depth errors, so we review boring access, select turning or mill-turn tooling around the internal geometry and measure critical bore and shoulder depths before later operations add cost.
Housing sections that assemble correctly before anodizing can bind after finishing, so thread starts, reliefs, mating diameters and coating allowance are reviewed together, with masking or post-finish gauge checks used where the drawing requires stable repeat assembly.
Button openings, connector ports, flats and slots must remain correctly positioned around the turned body, so indexed 3/4-axis, mill-turn or 5-axis machining is selected to reduce unnecessary datum transfers and preserve feature-to-axis relationships.
Visible housings can fail visually even when dimensions pass, so cosmetic A-surfaces are defined before fixturing, machining can reach Ra 0.2 μm where applicable, anodized color can be controlled to ΔE≤1.2 when specified, and finished parts are protected through inspection and packaging.
Before machining starts, we review which features control assembly, where thin-wall or deep-bore risk exists, how turning and secondary milling should share datums, and which dimensions may change after anodizing or coating. The goal is to find problems while they can still be solved in the drawing and process plan—not after parts have already been machined and finished.
We map thin-wall zones, fixture contact and material-removal sequence before programming, then separate roughing and finishing where needed so lightweight housings are less likely to move after deep internal machining.
Motor bore size, axis and shoulder relationship are identified as functional characteristics before machining; suitable critical dimensions can be controlled to ±0.005 mm after engineering review so the process and inspection plan focus on repeatable motor seating.
Shoulder depths are reviewed against the complete internal stack because a correct bore diameter can still fail assembly if the axial seat is wrong; tool access and inspection points are therefore planned before release.
Thread start, relief, mating diameter and finishing buildup are checked together so threaded housing sections can still assemble after anodizing or coating, with masking, allowance and gauge verification defined where required.
Deep cavities are reviewed for tool reach, chip evacuation and measurement access, then turning, boring, mill-turn or multi-axis machining is selected according to the actual geometry rather than forcing every feature into one operation.
Button openings, connector ports, flats and slots are related back to the main turned datum, and 3/4-axis or 5-axis machining is selected where reducing re-clamping helps protect their position around the cylindrical body.
Visible surfaces are defined before fixture planning so clamp contact, deburring and handling stay away from critical appearance areas; machined surfaces can reach Ra 0.2 μm where the geometry and specification require it.
Critical bores, threads and mating diameters are identified before finishing so masking or dimensional allowance can be built into the machining plan, reducing the risk of a part passing before coating but failing afterward.
Logo position, laser marking and engraving are reviewed together with clamping and finishing so branding remains aligned, avoids functional interfaces and is completed at the correct point in the manufacturing sequence.
Tattoo pen housings usually combine a cylindrical ID/OD system with threads, internal shoulders, side openings, slots and cosmetic surfaces, so VMT matches turning, mill-turn, indexed milling, 5-axis machining or Swiss machining to the actual feature access and datum relationship instead of sending every housing through the same machine route.
Best for side ports, button openings, flats, slots, logo pockets and accessible multi-face features after the main housing axis has been established by turning, keeping secondary machining economical without unnecessary 5-axis cost.
Best for: side openings, flats, slots, end caps, accessible secondary features
Used for contoured pen bodies, angled connector features and complex multi-face housings where reducing setup transfers helps protect the relationship between the motor axis, external geometry and secondary openings.
Best for: contoured bodies, angled ports, multi-face housings, complex end sections
Primary for cylindrical tattoo pen housings because ID, OD, shoulders, grooves and threads can be built around one rotational axis, while mill-turn adds ports, flats or slots with fewer datum transfers on suitable geometry.
Best for: main bodies, motor housings, threaded sections, concentric ID/OD features
Suited to smaller-diameter sleeves, rear caps, compact motor sleeves and slender concentric housing components where stable bar-fed turning supports repeatable threads and cylindrical features; VMT's published Swiss tolerance capability reaches ±0.01 mm for suitable geometry.
Best for: small sleeves, rear caps, motor sleeves, compact threaded cylindrical parts
Expand each step to see how the machining route protects axis relationships, thin walls, finish-sensitive fits and cosmetic surfaces.
Material choice changes housing weight, wall rigidity, machining cost, corrosion behavior and finishing options, so VMT matches the alloy to the actual housing structure, appearance target and production requirement rather than using one default material for every design.
Used for lightweight main and motor housings, 6061-T6 machines cleanly, anodizes consistently, and helps balance low mass, appearance, repeatable fit, and production cost.
Used for thin-wall or higher-strength housings, 7075-T6 offers high strength-to-weight performance, supports anodizing, and helps retain rigidity while reducing unnecessary housing mass.
Used for appearance-focused housings, 6063 machines well, develops attractive anodized surfaces, and helps brands achieve lightweight structures with clean, consistent cosmetic finishes.
Used for compact motor sleeves or wear-prone housing features, 303 machines efficiently, accepts passivation, and provides durable threads, interfaces, and repeatable precision.
Used where corrosion resistance and durable metal surfaces matter, 304/316 support passivation or electropolishing and provide robust housings for demanding cleaning environments.
Used for decorative bodies, counterweight sections, or precision inserts, brass machines smoothly, accepts polishing and plating, and adds premium appearance with controlled mass.
Used for premium lightweight high-strength housings, Grade 5 titanium resists corrosion, accepts polishing or PVD, and delivers durability with reduced structural mass.
Used selectively for conductive, thermal, or decorative housing features, copper machines precisely, accepts polishing and plating, and adds heat-transfer or visual value.
Tattoo pen housings are high-appearance components, but finishing must not compromise motor bores, housing threads, mating diameters or locating shoulders, so VMT reviews the finish together with machining allowance, masking and post-finish inspection.
Provides color, corrosion resistance and a durable cosmetic surface for aluminum housings, with critical threads and bores reviewed before finishing.
Creates a uniform matte appearance that reduces visible machining direction while supporting controlled anodized color on appearance-critical aluminum housings.
Adds wear resistance to suitable aluminum surfaces, with coating buildup reviewed against motor seats, threads and mating diameters before release.
Creates brighter or smoother visible surfaces while process control protects sharp transitions, engraved details and functional mating geometry.
Adds directional texture for premium cosmetic designs, with orientation controlled to keep production appearance consistent across visible housing surfaces.
Supports premium color or wear-focused surfaces on suitable designs, with coating thickness and fit-sensitive areas reviewed before processing.
Adds logos, model information or serial marks after process planning so branding remains aligned and does not interfere with critical surfaces.
Used mainly for stainless housing components to improve corrosion resistance or surface cleanliness while preserving drawing-defined functional geometry.
Inspection is built around the dimensions that decide whether the housing will assemble and look right: motor bore size and axis, internal shoulders, remaining wall thickness, threads, secondary openings and finished mating surfaces. Critical dimensions can reach ±0.005 mm after engineering review, machined surfaces can reach Ra 0.2 μm where required, and high-appearance anodized parts can be controlled to an approved color standard of ΔE≤1.2 when specified.
Checks are placed at the stage where they can prevent the next process from adding cost: IPQC verifies machining features before finishing, post-finish inspection confirms fit-sensitive areas after anodizing or coating, and final appearance inspection checks scratches, dents, color and handling condition before protective packaging.
| Inspection Focus | Problem Prevented | Typical Control Method | Customer Result |
|---|---|---|---|
| Main Housing ID / OD | Incorrect wall condition or mating diameter | Bore / OD measurement against drawing; ±0.005 mm available for suitable critical dimensions after review | Stable housing geometry and mating diameters |
| Motor Bore | Loose, tight or off-position motor seating | Bore gauge, CMM or dedicated measurement depending on tolerance and datum requirement | More repeatable motor installation |
| Concentricity / Runout | Motor and drive axis misalignment | CMM or runout measurement where the drawing defines a functional axis relationship | Better alignment through the assembled drive system |
| Internal Shoulder Depth | Incorrect axial stack or component position | Depth measurement, height gauge or CMM linked to the functional datum | Controlled motor and drive seating depth |
| Wall Thickness | Ovality, weak sections or distortion after material removal | Section-specific IPQC checks before later machining and finishing | More consistent lightweight housings |
| Threads & Mating Features | Binding, looseness or failed assembly after finishing | Thread gauges, mating checks and post-finish verification where coating buildup matters | Smoother repeat assembly |
| Side Openings / Milled Features | Misplaced buttons, connector ports, slots or flats | Datum-based positional inspection or CMM from the same functional reference used in machining | Correct relationship to the housing axis |
| Surface Roughness & Cosmetic A-Surfaces | Visible tool marks, scratches or inconsistent pre-finish surfaces | Roughness measurement where specified plus visual inspection; Ra 0.2 μm achievable where applicable | Cleaner appearance before finishing |
| Finished Mating Areas & Color | Fit or appearance changing after anodizing / coating | Post-finish dimensional verification and approved color comparison; ΔE≤1.2 when specified | Fit and appearance checked before shipment |
A prototype confirms whether the design can be manufactured and assembled as intended. Production must confirm whether the same result can be repeated consistently across future batches.
Review geometry, critical dimensions, material, finishing and quantity.
Validate motor installation, fit, clearance, wall condition and appearance.
Correct assembly or manufacturability issues before production release.
Define datums, fixtures, tooling, inspection points and finishing requirements.
Monitor critical features before the batch reaches later processes.
Coordinate approved finishing and final dimensional/appearance inspection.
Maintain the approved manufacturing logic for future production batches.
We machine the metal housing structures that define weight, assembly fit, external appearance and serviceability in tattoo pen programs. The machining plan is coordinated around your motor and drive interfaces, connector layout, adjustment mechanism, brand finish and production quantity so the housing is developed as part of the complete mechanical design rather than as an isolated cosmetic shell.
Main bodies and motor housings designed around compact internal packaging, low weight, connector access, critical motor alignment and high-appearance anodized surfaces.
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Cylindrical metal bodies with RCA or other connector-side openings, controlled internal datums and customer-specific rear housing geometry for reliable assembly.
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Housing sections built around rotating or adjustable mechanisms where internal clearance, thread fit, axial positioning and exterior alignment must remain coordinated.
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Drawing-based housings with brand-specific geometry, anodized color, texture, laser marking and packaging requirements coordinated from prototype validation into repeat production.
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The original production route used aluminum bar stock plus CNC machining, which required excessive material removal and long machining time for the deep internal cavity. For volume production, our engineers changed the route to a formed aluminum blank followed by CNC turning, live-tool machining and multi-axis CNC operations, reducing machining cost while keeping the required dimensional and appearance quality.
Reduce material waste and machining time as the cylindrical aluminum housing moved from development into production, while maintaining stable inner/outer geometry, threaded features, button-hole position and final surface quality.
Machining the full internal cavity from bar stock consumed too much material and cycle time. The part also required multiple machining stages, so a stable benchmark had to be maintained between turning and later operations. Button holes required consistent dimensional control and sharp-edge management before finishing.
We used a 200T stretching process to create the near-net-shape blank, established the turning benchmark, machined the inner and outer surfaces by lathe, completed mouth threads and button-hole features with CNC / live tooling, and used additional multi-axis machining for the remaining geometry.
Button-hole tolerances were controlled with easy-to-check gauges, sharp corners were managed before painting and surface treatment, and the optimized process reduced machining cost by 50% while meeting the required quality level for production.
Samples are only useful when they lead to a stable production decision. We focus on delivering parts that pass customer testing, arrive in good condition and give purchasing and engineering teams confidence to move into the next order.
“We have now tested the samples and found out that their quality was very good. So, we would like to order a batch of 1000 pcs of each type for our production.”
Sample approval → 1,000 pcs production order
“Products received! Thanks Wendy and the VMT team. We are really happy with the end product.”
Finished-part quality recognized after delivery
“Your parts were perfect, thank-you. I want to order a production quantity soon.”
Approved parts → production intent
“Yes! All is good. Thanks for doing a great job!”
Quality and project execution confirmedSend the information you already have. We use it to review material, machining route, critical fits, surface finishing, inspection and production planning before quotation; missing manufacturing details can be clarified during DFM review.
Send the complete 3D geometry so we can review internal cavities, thin walls, tool access, turning features and secondary milled geometry.
Mark critical tolerances, threads, GD&T, datum relationships and dimensions that directly control motor, drive or housing assembly.
Tell us the alloy you want to machine. If it is not decided, share the part application plus weight, strength, corrosion, wear and appearance priorities and we can help compare suitable material options.
Tell us the first prototype quantity and expected production volume so we can decide whether the prototype process can scale directly or should be optimized before larger batches.
Identify motor bores, internal shoulders, bearing/sleeve fits, threads and mating diameters that must assemble reliably so process and inspection controls focus on functional features.
Provide mating-part drawings, samples or interface dimensions when available so the housing can be reviewed as part of the mechanical assembly rather than as an isolated shell.
Specify anodizing, bead blasting, polishing, PVD or other finishes together with target color, gloss or texture; approved samples are useful for appearance-critical projects.
Mark the visible areas that must remain free from clamp marks, scratches or color inconsistency so fixture contact, handling and packaging can be planned correctly.
Provide logo artwork, location, orientation and marking method so engraving or laser marking is placed correctly in the machining and finishing sequence.
Tell us if finished housings need individual protection, trays, labels or special handling so high-appearance surfaces remain protected after final inspection.
Need matching metal components for the same tattoo equipment program? We also machine separate grip systems and open-frame rotary structures from customer drawings, with process and inspection controls matched to each component's functional interfaces.
A tattoo pen housing is easy to underestimate because much of the exterior is cylindrical. In practice, weight reduction, motor alignment, thin walls, threads, secondary openings and anodized appearance all interact, so the drawing should be prepared around the finished assembly—not only around what is easy to machine.
The housing should be dimensioned around the features that control the internal mechanism. The motor bore, internal shoulders, drive-axis relationship and mating body sections matter more than an unrelated external cosmetic diameter. If those features are created from different datums without a clear functional reference, each individual dimension can pass inspection while the assembled mechanism still runs off-axis.
On the 2D drawing, define the datum structure around the motor and housing axis where alignment matters. Use GD&T only where it protects function, and identify the surfaces that locate the motor, drive mechanism, rear section or other mating components. Suitable critical dimensions can be controlled to ±0.005 mm after engineering review, but applying that tolerance to every diameter normally increases machining and inspection cost without improving the final product.
The practical result is a process plan built around the assembly relationship: turning establishes the rotational foundation, later milling references that foundation, and inspection checks the features that actually determine how the tattoo pen goes together.
Not every surface on a tattoo pen housing needs the same tolerance. Motor seats, bearing or sleeve fits, threaded interfaces and axial shoulders can directly affect assembly, while many external curves exist mainly for appearance and ergonomics. Using the same tight tolerance everywhere makes the program slower, increases tool changes and raises inspection cost.
Classify the drawing into functional features, mating features and cosmetic surfaces. Tighten only the relationships that affect alignment, fit or movement. For visible surfaces, define the cosmetic standard separately—surface roughness, acceptable tool marks, edge condition, blast texture or anodized color—so appearance is controlled without forcing unnecessary dimensional precision onto non-functional areas.
Light weight is important for handheld tattoo equipment, but simply removing more internal material can create a housing that is difficult to manufacture consistently. Deep cavities leave less material to resist clamping force, and uneven wall thickness can allow the body to move as internal stress is released during machining.
Use gradual wall transitions where possible, avoid unnecessary deep pockets that add little functional value, and keep enough material around motor seats, threads and connector openings to support the final geometry. During DFM, the roughing and finishing sequence can then be arranged so the housing stabilizes before critical diameters are completed.
Most tattoo pen housings are not pure turning parts. The main ID, OD, shoulders, grooves and threads are naturally created around a lathe axis, but side ports, button openings, flats, slots and logo pockets require live tooling, indexed milling or 5-axis access. The process should therefore be planned as one coordinated route instead of treating turning and milling as unrelated operations.
Where possible, establish the main rotational datum first and reuse it during secondary machining. Mill-turn can reduce re-clamping on suitable geometry; 3/4-axis milling is economical for accessible side features; 5-axis machining becomes useful when angled features or contoured bodies would otherwise require several setups.
Anodizing should be considered while the housing is still being dimensioned. Threads, motor bores, bearing seats and mating diameters may behave differently after a surface layer is added, while bead blasting before anodizing can also change the appearance and edge condition of cosmetic areas.
Identify which surfaces are allowed to receive the finish and which must preserve a functional fit. Depending on the drawing, the process may use machining allowance, masking or post-finish verification. For appearance-critical housings, define the finish sample, gloss/matte expectation and A-surfaces before production; approved anodized color standards can be controlled to ΔE≤1.2 when specified.
A dimension is only useful in production if it can be measured reliably. Deep shoulders, narrow internal grooves and complex datum relationships can be difficult to verify after the complete housing is finished. If inspection access is ignored during design, the part may require expensive special gauges or leave critical features dependent on indirect measurement.
During drawing review, identify how each critical feature will be checked: bore gauge, thread gauge, depth measurement, CMM, runout inspection or mating-part verification. Place IPQC before the next expensive process when possible. A motor bore should be checked before anodizing; a finished thread may need another mating check afterward.
Send your available STEP/STP file, 2D drawing, material, quantity, critical fits and surface-finish requirements. We can review manufacturability, machining risks, inspection priorities and finishing considerations before quotation.
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