Gelenk-Manipulator für Körbe
Gelenk-Manipulator für Körbe
Category 01
Vacuum hose lifters: Disadvantages and the better alternative
A vacuum tube lifter swings, suctions, and holds the load using only one safety device. For many components weighing 50 kg or more, a device with a rigid load guide is the more reliable alternative. ZHHT builds complete devices – mechanical, with suction cups, or as a combination of both. Your honest decision-making guide.
CHAPTER 1
How a vacuum tube lifter works
A vacuum tube lifter, also called a lifting tube or vacuum lifter, uses a blower to create a continuous vacuum. A suction gripper adheres to the load, and a flexible tube contracts during lifting. This method is fast and ergonomic for light, flat goods with a dense, clean surface: boxes, sacks, and sheets up to approximately 50 kg.
This guide doesn't disparage the technology. The tube lifter is strong in its segment. It shows where its physical limitations and disadvantages begin, and when a engineered device is the better alternative.
CHAPTER 2
Pendulum-mounted or rigidly guided?
The crucial difference lies in the load handling. A tube lifter hangs from a tube and allows the load to swing. This is desirable for order picking, but becomes a problem as soon as a component needs to be fitted, inserted, or positioned with pinpoint accuracy.
ZHHT fixtures guide the load rigidly and precisely directly at the component. The fixture grips the workpiece securely, holds it in position without any pendulum movement, and precisely defines the direction of movement required by the process. This is the difference between "moving it somehow" and "reliable joining."
CHAPTER 3
We build devices, not just lifts.
One important difference: A tube lifter is a standard device with a suction cup. ZHHT designs complete fixtures tailored to your specific component. The load-bearing capacity is developed for your geometry, using grippers, mandrels, form fixtures, crossbeams, or clamps. Our article on custom grippers and fixtures illustrates what this looks like.
And if vacuum technology is the right technology for your application: Suction cup devices are also part of our modular system. The article "What is a suction cup device?" explains exactly what this means. A practical example is our manipulator with a suction cup device for mounting plates up to 100 kg . We're not against vacuum technology; we choose the gripping technology according to your specific requirements.
MECHANICALLY
Form recording
Zangen, Dorne, Klemmungen und Formschalen, individuell für Ihr Bauteil konstruiert.
VACUUM
suction device
Where vacuum technology makes sense, we integrate suction cups combined with rigid guidance.
COMBINED
Suction + Gripping
Suction cup for suction, mechanical positive locking for securing. Redundancy for maximum safety.
CHAPTER 4
Safety: double protection is better
A simple vacuum tube lifter relies on a single safety mechanism to hold the load: the vacuum. As long as the suction is active, the gripper holds reliably. The situation becomes critical when the load changes. If the operator bumps the workpiece or it deforms during lifting, the vacuum can break and the load can fall.
This is precisely where our combined suction and gripping device comes into play. The suction cup gently picks up the component, while a mechanical positive locking mechanism provides additional security. If one locking mechanism fails, the second one holds. This redundancy principle offers a significant increase in operational safety, especially for safety-critical loads or those moved overhead.
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The second safety aspect is the control system. Standard tube lifters are designed for quick, one-handed operation; that's their selling point. A true, safety-oriented two-handed control, as required at many machining and joining stations, is not standard. With ZHHT devices, the operation can be specifically tailored to the safety requirements of your workplace, from one-handed operation to defined two-handed operation, ensuring the operator's hands remain securely on the control during critical movements.
CHAPTER 5
What are the disadvantages of vacuum tube lifters?
A vacuum requires a dense contact surface. Without it, the holding force decreases. In addition, there are economic disadvantages that are often underestimated in everyday practice:
01 Surface
Oily & dirty
Oils, chips, and release agents disrupt the seal. Typical in machining, foundries, and press shops.
03 Energy
Continuous consumption
The blower runs even when stationary. Low energy efficiency, up to 4 kW at 200 kg.
02 Structure
Porous & permeable
Uncoated wood, open-pored casting, and fabric allow the negative pressure to escape.
04 Environment
noise level
Side channel blowers produce a sometimes unpleasantly high continuous noise level.
CHAPTER 6
Hose lifter and device in comparison
Both approaches have their merits. The following comparison shows, based on six criteria, when a vacuum tube lifter is suitable and when a ZHHT device is the process-reliable choice.
01 Loads from 50 to 200 kg.
A vacuum tube lifter operates at its performance limit in this area and consumes a lot of energy. A ZHHT device guides the load here in its core area, reliably and without continuous extraction.
02 Precise joining and positioning
The tube lifter swings along the tube and does not give the load a defined position. The ZHHT device guides the load rigidly and without swinging directly along the component, making it ideal for insertion, joining, and screwing.
03 Securing the load
A tube lifter holds the load using only one safety mechanism, the vacuum, which can break if the load changes. The ZHHT device provides redundant safety through suction and mechanical positive locking: If one safety mechanism fails, the second holds.
04 Safety-related control
Standard hose lifters are designed for quick one-handed operation; a true two-handed safety control is not standard. With ZHHT, the operation can be specifically tailored to the workplace, including a defined two-handed operation.
05 Oily, porous or hot surfaces
On oily, porous, or hot surfaces, the suction gripper loses its holding force, and the vacuum breaks. The ZHHT device grips using a form-fit mechanism and operates regardless of the surface condition.
06 Sensitive, smooth surfaces
This is where the tube lifter demonstrates its strength: gentle, even suction without pressure marks. When vacuum technology is the right approach, ZHHT builds the appropriate suction device with defined guidance.
CHAPTER 7
Three things only ZHHT offers
A standard hose lifter is a catalog item with a suction cup. What distinguishes it from a ZHHT device can be summarized in three points that a pure lifter supplier cannot provide.
Guide directly on the component
Rigid, pendulum-free load guidance
Directly on the workpiece. The device grips your component securely and precisely dictates the movement. A hose lifter cannot do this; it swings along the hose.
Grasping and sucking at the same time
Double safety through redundancy. The suction cup picks up the contents, while the mechanical positive connection ensures a secure fit. If one safety mechanism fails, the second holds. A simple tube lifter doesn't offer this combination; it relies solely on vacuum for safety.
Designed for your component
Custom machine construction instead of standard equipment. Every fixture is custom-built for your geometry, weight, and process, developed by our engineers. A catalog tube lifter forces your component into a pre-defined grid. We do it the other way around.
CHAPTER 8
Interactive: Which solution is the right one?
Answer six questions about your application. The finder will provide an initial, non-binding assessment.
CHAPTER 9
Seven signals for a device
If any of these signals apply, it's worth taking a look at a custom-designed device before investing in a standard tube lifter.
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The component must be joined with precise positioning. A pendulum guide is not sufficient.
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Security is the top priority. Redundant backup beats a single one.
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The surface is oily, porous, or rough. The suction cup is losing its holding power.
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The load is over 50 kg. Creating a vacuum becomes complex and energy-intensive.
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The workplace requires two-handed control. This is not standard for hose lifters.
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Workpieces emerge from the process hot. Seals suffer, service life decreases.
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They want a complete solution: recording, guidance, securing, and drive, all from a single source.
CHAPTER 10
What else you get with ZHHT
A lifting aid is more than just the device itself. Those who buy from ZHHT get a partner who designs the solution, ensures its safety, and supports it throughout its entire lifecycle.
Design according to your component
Special machine construction since 1999. The image is created for your geometry, not the other way around.
One contact person, complete solution
Mounting, guidance, securing, drive and crane connection from a single source, no interface gaps.
Certified quality
ISO 9001 and TISAX Level 2 with prototype protection. Secure even for sensitive components.
Experience from 18 industries
From automotive to foundries to heat treatment. We understand the requirements of your environment.
Consultation without technical constraints
We recommend mechanical, vacuum, or hybrid solutions, depending on the task, not based on product range.
Spare parts guaranteed for 10 years
Predictable operational reliability instead of obsolescence after a short time. Long system lifespan.
Loads from 25 to 1,200 kg
A portfolio that grows with you. If your requirements change, we have the right class.
Maintenance, safety inspections and service
Regular inspections and service are provided to ensure your system remains safe and available.
CHAPTER 11
The ZHHT portfolio at a glance
From light one-handed operation to heavy loads: ZHHT covers the entire range from 25 to 1,200 kg. Our guide explains in detail which design is suitable for which situation: Selecting the right lifting aid: Manipulator, lifting axis, and lifting platform compared .
FAQ / Q&A
FREQUENTLY ASKED QUESTIONS
01 What is the alternative to a vacuum tube lifter?
A specially designed device with rigid load guidance. Instead of allowing the load to swing along the hose, a fixture securely grips the component. For loads between 50 and 200 kg, the cable manipulator and ZH90 Flex-Arm are suitable; for heavier loads, the articulated manipulator (up to 800 kg) or the ZH90 lifting axis (up to 1,200 kg) are recommended.
02 What are the disadvantages of vacuum tube lifters?
They require a clean, dense surface and fail on oily, porous, or rough surfaces. They guide the load in a pendulum-like motion, not with precise positioning. The blower consumes energy even when stationary and generates continuous noise. The load relies on only one safety mechanism: the vacuum.
03 What is the difference between oscillating and rigid load guidance?
A hose lifter hangs from a hose, the load swinging freely. A device with rigid load guidance grips the component securely and holds it without swinging, ideal for precise positioning, insertion, and screwing.
04 Do vacuum tube lifters offer a two-hand safety control?
Not as standard. Tube lifters are designed for quick one-handed operation. Custom-designed devices can be specifically tailored to the safety requirements of the workplace, up to and including defined two-handed operation.
05 Can a hose lifter lose its load?
As long as the vacuum is maintained, the gripper will hold. If the load changes, for example due to impact or deformation, the vacuum can break. A combined suction and mechanical gripping device provides redundant load securing.
06 Can a vacuum tube lifter lift oily or porous parts?
Only to a limited extent. Oily, porous, or rough surfaces lead to vacuum loss. A device with mechanical form clamping grips regardless of the surface condition and is therefore more reliable in these cases.
07 For which loads is a vacuum tube lifter the best choice?
For light, flat goods with a dense, clean surface, up to approximately 50 kg, that are freely movable. In this segment, it is fast and ergonomic.
READ MORE
FURTHER GUIDES ON THIS TOPIC
In-depth guides on related topics in handling technology.
COUNSELOR
Was ist eine Saugvorrichtung?
How ZHHT integrates suction cups into custom devices and when vacuum is the right gripping technique.
PRACTICAL EXAMPLE
Manipulator mit Saugvorrichtung
Flexible handling of mounting plates up to 100 kg: suction and guiding in one solution.
SELECTION
Die richtige Hebehilfe wählen
Manipulator, lifting axis or hoist: which design is suitable for which task, in direct comparison.