The practical difference between the SPUN 4,000 and SPUN 2,000 is stated system capacity. Sputtek describes the SPUN 2,000 as handling up to 1,200 kg in a single cycle, while the SPUN 4,000 is described as handling up to 3,000 kg. That makes the SPUN 2,000 a potential fit for smaller or lower-volume requirements, while the SPUN 4,000 deserves evaluation when heavier batch loads or future production growth are central concerns.
This is not a choice between two coating chemistries or guaranteed levels of coating quality. The right system depends on the parts, fixtures, batch composition, production cadence, preparation and finishing flow, and quality requirements. Maximum load is an important starting point, not a complete equipment specification.
Quick summary
- SPUN 2,000: stated capacity of up to 1,200 kg per cycle.
- SPUN 4,000: stated capacity of up to 3,000 kg per cycle.
- The designations describe PVD equipment capacity, not different coating types or automatic quality grades.
- Part geometry, fixture layout, loading requirements, and coating exposure can reduce usable capacity.
- Confirm chamber dimensions, cycle time, utilities, installation, pricing, maintenance, and documentation directly with Sputtek.
The verified difference between SPUN 4,000 and SPUN 2,000
Both models are PVD coating systems for industrial production. The clearest verified distinction is the stated maximum single-cycle load: up to 1,200 kg for the SPUN 2,000 and up to 3,000 kg for the SPUN 4,000.
| Consideration | SPUN 2,000 | SPUN 4,000 |
|---|---|---|
| Stated maximum load | Up to 1,200 kg per cycle | Up to 3,000 kg per cycle |
| Potential fit | Smaller or lower-volume programs, subject to part and fixture review | Heavier batch loads, larger programs, or planned growth, subject to part and fixture review |
| Coating category | PVD system | PVD system |
| Not established by the model name | Exact chamber size, cycle time, or coating quality | Exact chamber size, cycle time, or superior coating quality |
These figures are useful for initial planning, but they do not mean every part mix can use the full stated load. A batch may reach the weight limit before the fixture space, part clearance, or coating exposure is suitable. A light batch may also require a larger system if its physical envelope is substantial.
What the capacity difference means for production planning
The difference between 1,200 kg and 3,000 kg matters when it changes how you organize batches and schedules. Begin with a representative production run rather than relying only on the heaviest part or an average that hides variation.
- What are the typical and maximum total batch weights?
- How many part numbers must run together?
- Does the batch contain heavy components, small tools, long parts, or mixed geometries?
- How often must coated parts be available?
- Are demand and batch sizes expected to increase?
A higher-capacity system may allow compatible parts to be consolidated into fewer runs, but the available evidence does not establish exact cycle times or daily throughput for either model. Do not convert the kilogram figures into an assumed number of cycles per day without confirming loading, preparation, coating, unloading, inspection, and post-processing requirements.
Sputtek states that it supports work from prototyping through high-volume production. The transition path therefore matters: a system suitable for an initial trial may not be the best long-term choice if the part family, batch frequency, or production volume is expected to change.
Which system may fit your operation?
When the SPUN 2,000 may be a sensible starting point
The SPUN 2,000 may be worth evaluating when representative batches are comfortably within its stated capacity and the production plan does not require the additional load-handling range of the SPUN 4,000. It may suit smaller programs, staged qualification, or a product mix that does not justify a larger system.
That conclusion still requires an actual parts and fixtures review. Lower total weight does not guarantee suitability if parts are unusually large, require special orientation, or need spacing that limits the load.
When the SPUN 4,000 may warrant evaluation
The SPUN 4,000 may deserve consideration when regular batches approach the practical range of the SPUN 2,000, when heavy components must be processed together, or when a high-volume program is expected to grow. Its stated capacity of up to 3,000 kg provides a larger load-handling reference for those discussions.
More capacity is not automatically better. A larger system may be unnecessary if your parts, cadence, facility, or business case do not require it. Balance current requirements with credible forecasts instead of choosing the largest model by default.
Why nominal capacity is not the whole equipment decision
Part geometry can matter as much as mass. Length, width, height, recessed features, surface orientation, and required spacing can affect how many components fit and whether critical surfaces receive the intended treatment.
Fixture strategy also changes usable capacity. Fixtures must support parts consistently, expose the surfaces requiring coating, and allow repeatable loading. A heavy fixture arrangement consumes part of the stated load, while a physically large arrangement may limit the number of components even when the batch is relatively light.
The complete process route matters too. Sputtek lists in-house sandblasting, microblasting, degreasing and cleaning, stripping and polishing, after-coating polishing, and quality-control laboratory testing among its supporting capabilities. These steps affect scheduling, handling, acceptance criteria, and batch release.
For a broader planning framework, review the factors involved in PVD equipment planning, including geometry, batch cadence, fixtures, preparation, post-processing, and quality control.
PVD equipment selection criteria beyond the model name
Application and coating requirements
Define the substrate, part function, failure mode, and required coating family. PVD may support stamping, plastic processing, machining and cutting, aluminum die cast and extrusion, and component applications, but the correct process depends on the specific operating environment. The model name cannot determine recipe suitability.
Current and forecast demand
Measure representative batch weights, part counts, production frequency, and peak demand. Separate confirmed demand from speculation. A credible growth forecast may justify evaluating the SPUN 4,000, while uncertain demand may call for a staged assessment.
Fixtures and repeatability
Ask how parts will be oriented, how critical surfaces will be exposed, how fixtures affect capacity, and how the arrangement can be repeated from prototype runs through production. Fixture repeatability is central to consistent loading and process control.
Preparation, finishing, and quality records
Confirm how cleaning, blasting, stripping, polishing, lapping, inspection, and release documentation fit into the proposed workflow. For regulated or quality-sensitive applications, identify required records and acceptance criteria before selecting equipment.
Machine details to confirm before specifying either system
The available evidence verifies the two stated load capacities, but not several details that may determine facility and process fit. Request current specifications for:
- Internal chamber dimensions and usable fixture envelope.
- Maximum part dimensions, loading constraints, and allowable fixture mass.
- Typical and validated cycle times for your parts and recipes.
- Power, utilities, ventilation, floor space, and installation requirements.
- Automation, loading method, recipe control, and operator requirements.
- Maintenance intervals, service arrangements, spare parts, and training.
- Purchase price, delivery schedule, commissioning scope, and warranty terms.
- Process documentation, inspection records, and quality-control outputs.
Do not infer these specifications from the model names. In particular, do not assume that SPUN 4,000 provides better adhesion, greater hardness, a different chemistry, or a shorter cycle simply because it has a higher load capacity.
Buyer checklist for a productive system-fit discussion
- Part drawings, dimensions, weights, materials, and useful photographs.
- Surfaces requiring coating and areas that must remain uncoated.
- Coating requirements, known failure modes, and operating conditions.
- Typical, minimum, and maximum batch weights.
- Part counts and the part numbers that may run together.
- Current production volume, delivery cadence, and forecast growth.
- Existing or proposed fixture concepts, orientation, and spacing.
- Preparation, stripping, polishing, lapping, inspection, and packaging needs.
- Quality records, acceptance limits, traceability, and customer documentation.
- Facility constraints, installation timing, budget range, and procurement milestones.
This moves the discussion beyond “Which machine is bigger?” toward the more useful question: which system can support the required parts, controls, cadence, and growth plan with appropriate capacity?
FAQ
Are SPUN 2,000 and SPUN 4,000 different coating types?
No. Both are identified as PVD coating systems. Their principal verified distinction is stated single-cycle load capacity, not coating chemistry.
Does SPUN 4,000 provide better coating quality?
There is no supplied evidence that SPUN 4,000 automatically produces better quality. Quality depends on preparation, fixtures, recipe, process control, and inspection. Confirm comparative performance for your parts directly with Sputtek.
Is stated kilogram capacity the same as usable production capacity?
No. The figures are maximum single-cycle load references. Dimensions, fixture mass, spacing, orientation, exposure, and part mix can reduce usable capacity.
What should I provide when asking Sputtek to recommend a system?
Provide drawings, materials, dimensions, weights, coating requirements, batch weights, cadence, fixture details, forecast volumes, facility constraints, and quality documentation needs.
Can either system support prototypes through high-volume production?
Sputtek states that it supports coating work from prototyping through high-volume production. Suitability for a particular system depends on the parts, batches, fixtures, process requirements, and expected scale.
Conclusion: choose for the production requirement, not the larger number
The SPUN 2,000 and SPUN 4,000 comparison is primarily a capacity decision. The SPUN 2,000 is stated to handle up to 1,200 kg per cycle, while the SPUN 4,000 is stated to handle up to 3,000 kg. Those figures make the SPUN 2,000 a potential fit for smaller requirements and the SPUN 4,000 a candidate for heavier loads or larger growth plans.
Neither should be selected from the model name alone. Compare batch weights, geometry, fixtures, cadence, preparation, finishing, quality controls, facility requirements, and future demand. If you are evaluating PVD coating systems, provide those details to Sputtek for a system-fit discussion based on your parts, batch requirements, and production goals.
