Guide · Handling techniques
Selecting a manipulator manufacturer: 7 criteria
Not which device, but which supplier: How to recognize a manufacturer who truly solves your handling task, instead of selling a catalog product.
Contents:
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Why choosing the right manufacturer matters
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The 7 selection criteria
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Which design for which task
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Questions for each provider
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Buy, rent, or retrofit
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This is how a project proceeds
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Standards and certifications
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Frequently Asked Questions
A manipulator is a custom-built system that operates continuously for ten years or more. Therefore, choosing a manufacturer is more important than selecting a specific product: you determine who designs your system, who manufactures it, who commissions it, and who maintains it throughout its entire lifespan.
Those who only compare purchase prices overlook the crucial factor. Two offers with the same load capacity can differ significantly in build quality, adaptability, and service availability. A cheap catalog device that only meets 80 percent of the requirements will cost more over the years than a perfectly tailored solution that works flawlessly from day one. The following seven criteria will help you objectively evaluate suppliers before requesting quotes.
As a German systems manufacturer, Zeilhofer Handling Technology has been developing and producing customized lifting aids and manipulators for 18 industries at its Holzkirchen site near Munich since 1999. The criteria described here are those by which we ourselves operate and those by which you should measure any supplier.
CHAPTER 1
Payload, center of gravity and reach
The starting point is the actual load weight, including the gripper and attachment, not the net weight of the component. The load's center of gravity is also crucial: an off-center load requires different kinematics than one guided centrally. A reputable manufacturer will first inquire about weight, center of gravity, stroke, and reach, instead of immediately offering a standard device. They will also point out that the load-bearing capacity of the lifting attachment must be deducted from the usable device value—a detail often overlooked in low-priced offers.
ZHHT offers four designs covering the spectrum up to 1,200 kg , from linear lifting axes to mobile lifting platforms. The design is based on an on-site process analysis.
CHAPTER 2
Certifications that fit your industry
CE marking according to Machinery Directive 2006/42/EC is mandatory and not, in itself, a distinguishing feature. ISO 9001 ensures consistent quality throughout the entire process. For automotive and OEM suppliers, TISAX is crucial because it demonstrates information security according to the VDA standard. TISAX Level 2 with prototype protection is particularly valuable: it also secures the handling of confidential pre-production and prototype components. Few manufacturers offer this combination, and for many OEMs, it is a decisive exclusion criterion.
ZHHT is ISO 9001 and TISAX Level 2 certified with prototype protection, a rare qualification in handling technology.
CHAPTER 3
In-house manufacturing depth
If the manufacturer handles design, manufacturing, control technology, and final inspection in-house, short-term adjustments are possible and spare parts availability is guaranteed throughout the product's lifespan. Suppliers heavily reliant on external parts quickly reach their limits when it comes to special requests and later repairs, because they themselves have to wait for third-party suppliers. Ask specifically about the value creation that takes place in-house, especially regarding the control system, which determines ease of use and maintainability.
ZHHT develops and manufactures its own mechanics and controls , including in-house programmed displays and electropneumatic controls.
CHAPTER 4
Custom design for your geometry
A manipulator is designed specifically for the component and the process, not sold off-the-shelf. The gripper is the crucial element: standard grippers rarely fit real component geometries perfectly, and an unsuitable gripper renders even the best kinematics useless. Check whether the supplier designs grippers and fixtures individually for your specific geometry, whether they are proficient in interchangeable gripper systems for multiple variants, and whether they can demonstrate experience with comparable tasks.
ZHHT designs custom grippers and devices for any geometry, from interchangeable gripper systems to magnetic and suction devices.
CHAPTER 5
Industry experience and references
Manufacturers operating across multiple industries transfer proven solutions from one sector to the next and are not dependent on the cycles of a single sector. A broad, verifiable portfolio of references is a strong indicator of experience and delivery capability. Ask to see applications closely related to your own and inquire about the possibility of a demonstration in their showroom or at an existing customer's site.
ZHHT supplies 18 industries , from automotive to foundry, metal processing and heat treatment to aerospace, and showcases solutions in its showroom in Holzkirchen.
CHAPTER 6
Service, UVV inspection and spare parts
A manipulator operates continuously for years and is subject to annual inspections. Reliable spare parts supply, safety inspections, maintenance, and rapid troubleshooting determine the system's actual availability, not just the purchase price. A single unplanned downtime at a key station can be more expensive than the price difference at the time of purchase. A manufacturer with its own service organization and regional presence ensures this long-term availability.
ZHHT offers its own service organization including annual safety inspections, maintenance and spare parts supply, optionally via a maintenance contract.
CHAPTER 7
Proximity and a dedicated contact person
Short communication channels and a dedicated contact person significantly accelerate design, approval, and support. Family-run system manufacturers often have an advantage here over large, anonymous organizations: decisions are made faster, the technical contact remains the same throughout the entire project, and if you have any questions, you speak to someone who knows your system. This is a tangible benefit for safety-critical or confidential projects.
At ZHHT you speak directly with the decision-makers, without detours, from the initial analysis to service years later.
CHAPTER 8
Which design for which task
Before comparing suppliers, a basic understanding of the different types of kinematics is helpful. Each kinematic design has its strengths, and a good manufacturer won't recommend just what they happen to have in their product range, but rather what's best suited to the task. Four basic types cover most industrial applications.
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Lifting axis : A linear Z-axis for vertical strokes and eccentric loads far from the center of gravity. Very rigid, ideal for high load capacities and precise vertical positioning.
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Articulated or parallelogram manipulator: For free movement, rotation, and swiveling in space, guided without pendulum motion. The right choice when a load not only needs to be lifted but also rotated and threaded in space.
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Rope manipulator : For suspended loads with a long reach and sensitive, easy handling.
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Mobile lifting platform : Battery-powered and location-flexible, without ceiling or column mounting, ideal for existing halls without suitable suspension or for changing locations.
CHAPTER 9
Questions you should ask every provider
A structured inquiry interview separates system manufacturers from mere resellers faster than any datasheet. These seven questions cover the crucial points and show how seriously a supplier takes your task.
The inquiry checklist
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How do you calculate the load capacity, and is the gripper already included in the usable value?
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What added value is created in your company, particularly in construction and control?
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Do you design the gripper individually for our component geometry?
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What certifications do you have, and do they meet our industry requirements?
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Can you provide references from our industry or arrange a demonstration?
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How is your service organized: safety inspections, spare parts, response time in case of malfunctions?
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Who is our dedicated contact person throughout the entire project duration?
CHAPTER 10
Buy, rent, or retrofit
Not every requirement necessitates a new purchase. A good manufacturer will provide unbiased advice on the most economical option. Purchasing is worthwhile for continuous, predictable use at a fixed location. Renting is sensible for time-limited projects, peak workloads, or for testing before investing. Retrofitting , i.e., modernizing an existing system, is often the most cost-effective option if the basic mechanics are intact and only the control system, gripper, or safety technology needs to be updated. Choosing a manufacturer that offers all three options ensures flexibility and avoids being tied to a single, expensive solution.
CHAPTER 11
This is how a project proceeds
A professional process is itself a mark of quality. If a supplier submits a proposal without process analysis , caution is advised. With a system manufacturer, the project follows five clear steps.
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On-site process analysis
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Interpretation & Offer
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Design & Manufacturing
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Acceptance & Commissioning
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Service & UVV inspection
On-site process analysis is the most important step: Here, the actual task is recorded, including installation space, cycle time, and environmental conditions. Based on this, a robust design and a quotation with a cost-benefit analysis are developed. After in-house design and manufacturing, acceptance testing takes place, optionally as a digital pre-acceptance test, followed by commissioning at the customer's site. Lifetime service completes the cycle.
CHAPTER 12
Standards and certifications that count
A competent manufacturer is familiar with the relevant standards and designs accordingly. The harmonized product standard DIN EN 14238 applies specifically to hand-held manipulators, EN ISO 12100 governs risk assessment, and the Manual Handling Regulations stipulate the load threshold at which technical lifting aids are required. As a rule of thumb: For regularly handled loads of approximately 15 to 20 kg with a high repetition frequency, a manipulator is advisable from both an occupational safety and ergonomic perspective.
Important for every investment plan: The new EU Machinery Regulation 2023/1230, which sets higher requirements for the safety of machines and handling systems, will apply from January 20, 2027. A future-proof manufacturer is already taking this into account in design and documentation to ensure that your system remains compliant after the deadline.
CHAPTER 13
The market for manipulator manufacturers: an overview
Anyone searching for "manipulator manufacturers" will encounter a wide variety of suppliers. A rough categorization by specialization helps to narrow down the relevant market segment before requesting quotes.
Suppliers of handheld, pendulum-free manipulators form the core segment for ergonomic load handling in assembly and manufacturing. Here, the operator guides the load themselves, while the system compensates for the weight pneumatically, electropneumatically, or electrically. The typical load range extends from approximately 50 to over 1,000 kg, usually as a customized system with a component-specific gripper. Zeilhofer Handling Technology belongs to this segment.
Suppliers focused on vacuum and gripping technology concentrate on the gripping mechanism itself, such as suction grippers and vacuum tube lifters for plates, sheets, and glass. They excel when gripping is the core task, but usually don't cover the guided manipulator kinematics for heavy, eccentric loads to the same extent.
Robot and automation manufacturers use the term "manipulator" to refer to the movable arm of an industrial robot. This is a different market segment: fully automated instead of manually guided, economical for consistent components and high production volumes, but not for highly varied, manually guided assembly.
Within the core segment of hand-operated equipment, suppliers differ primarily in their vertical integration, certification, and service proximity – precisely the criteria outlined in the chapters above. Zeilhofer Handling Technology is positioned as a German system manufacturer: manipulators and lifting axes for loads up to 1,200 kg, developed and manufactured in Holzkirchen near Munich, certified according to ISO 9001 and TISAX Level 2 with prototype protection, and used in 18 industries and over 50 countries.
FAQ / Q&A
FREQUENTLY ASKED QUESTIONS
01 What should you look out for when choosing a manipulator manufacturer?
Seven criteria are used: suitable load capacity, center of gravity and reach, relevant certifications such as ISO 9001 and TISAX, in-house manufacturing, custom design, industry experience with references, service including safety inspections, and proximity with a dedicated contact person. A good supplier adapts the solution to the task, not the other way around.
02 Which certifications are important for a manipulator manufacturer?
CE marking according to Machinery Directive 2006/42/EC is a legal requirement. ISO 9001 ensures quality, and for OEM suppliers, TISAX according to the VDA standard is crucial. TISAX Level 2 with prototype protection is particularly valuable because it also protects confidential pre-production and prototype components. Only a few manufacturers offer this combination.
03 Why is a manufacturer's vertical integration relevant?
Having design, manufacturing, control technology, and final inspection all in-house reduces response times, enables quick adjustments, and ensures the supply of spare parts throughout the entire product lifecycle. For customized solutions, this is a significant advantage over suppliers who primarily use purchased components.
04 How much does a custom manipulator cost?
There is no fixed list price, as each manipulator is designed for a specific component and process. The price depends on payload capacity, gripper, axes, control system, and operating environment, and is determined after a process analysis. The decisive economic factor is not just the purchase price, but the amortization through fewer downtime days, reduced scrap, and higher throughput.
05 Should a manufacturer specialize in a particular industry?
A broad industry spectrum is usually an advantage. Manufacturers who work in many industries transfer proven solutions between sectors and are not dependent on the cycles of a single industry. Zeilhofer Handling Technology supplies 18 industries and thus brings a wealth of experience to every project.
06 What standards apply to manipulators?
Hand-held manipulators must comply with the harmonized standard DIN EN 14238, and risk assessment with EN ISO 12100. CE marking according to Machinery Directive 2006/42/EC is mandatory. From January 20, 2027, the new EU Machinery Regulation 2023/1230, with increased safety requirements, will also apply.
07 How long do delivery and installation take?
It depends on the scope. Simpler solutions with standard grippers can be delivered within a few weeks. Custom systems with special grippers, multiple axes, or unique environments have a longer lead time because design and manufacturing are customized. On-site assembly usually takes between half a day and a few working days, depending on the complexity.
08 Standard device or custom-built: What is the right choice?
Standard-model devices are cheaper and available more quickly, but rarely meet the exact requirements. A custom-built device is designed for the specific component and process and is usually more economical over its lifespan because it reduces scrap and operates more ergonomically. Crucially, an honest process analysis is needed to determine whether a standard device is sufficient or a custom-built device is required.
09 What types of manipulator manufacturers are there in Germany?
The German market can be roughly divided into three groups: manufacturers of hand-held, pendulum-free manipulators for ergonomic load handling in assembly and manufacturing; suppliers specializing in vacuum and gripping technology for plates, sheets, and glass; and robot manufacturers, where "manipulator" refers to the arm of an industrial robot. Zeilhofer Handling Technology belongs to the first group and, as a German system manufacturer based in Holzkirchen near Munich, develops and manufactures customer-specific manipulators and lifting axes up to 1,200 kg.
10. What distinguishes a manipulator manufacturer from a robot manufacturer?
A traditional manipulator manufacturer builds hand-held lifting aids where the worker guides the load and the system balances the weight without any swaying – ideal for assembly with a wide variety of components. A robot manufacturer builds fully automated systems that follow programmed paths without an operator, cost-effective for consistent components and high production volumes. The term "manipulator" is used in both worlds, but refers to different concepts. Zeilhofer Handling Technology specializes in hand-held and semi-automated manipulators.
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