pneumatic gripper vs. hydraulic gripper



Pneumatic and hydraulic grippers are amongst the preferred gripper sorts (together with servo-electric). For those who’re questioning whether or not pneumatic or hydraulic grippers are more likely to be the perfect match to your software, this text is for you as we evaluate and distinction the design, efficiency and usefulness of hydraulic and pneumatic grippers.
Spoiler: As showdowns go, this one is simple to name. We’ll quickly uncover that for collaborative robotic functions, there isn’t a severe competitors between the 2: pneumatic grippers are the perfect alternative to your cobot-powered functions.
Let’s discover out why…
What’s a hydraulic gripper? 
Hydraulic grippers are heavy-duty grippers that apply the kind of forces required to deal with heavy (normally >50kg, 110.23 lb) gadgets.
How does a hydraulic gripper work?
Hydraulic grippers use pressurized fluids to maneuver a piston. When the piston strikes, it transfers this pressure to the claw, opening and shutting it. What’s a pneumatic gripper? How does a pneumatic gripper work? Pneumatic grippers use stress from a compressed air provide system to produce the facility required to maneuver an interior piston, thereby opening and shutting the pneumatic gripper fingers (or ‘jaws’). Pneumatic gripper mechanisms comprise no motors or gears, which makes it simple to translate the facility of a piston/cylinder system right into a gripping pressure. Because the majority of producing amenities have already got entry to compressed air, deploying pneumatic grippers is simple and cost-effective. One of many primary advantages of pneumatic grippers is that they supply a excessive quantity of gripping pressure in a small, gentle and low-cost bundle. For manufacturing amenities the place house is at a premium, pneumatic grippers are a cost-effective and ergonomic alternative. They’re additionally fairly simple to keep up –after getting your pneumatic gripper working, it might probably present thousands and thousands of cycles with out requiring upkeep.
What’s the distinction between pneumatic and hydraulic grippers?
One of many major the explanation why hydraulic grippers are hardly ever, if ever, utilized in collaborative automation is as a result of the everyday payloads do not match. For causes of security, ease of deployment, value, mobility and footprint, cobots are designed for lower-than-hydraulic payloads of as much as round 16kg (35.3 lbs). Due to this fact, for nearly each conceivable cobot-powered software, utilizing a hydraulic gripper can be costly overkill.
If you want to carry weights of 500kg (1102.31lb), for instance, a regular industrial robotic with a hydraulic gripper and fencing is likely to be the only option. However for Common Robots clients, pneumatics supply completely enough power density for functions corresponding to meeting, materials dealing with and machine tending.
Moreover, since hydraulic grippers comprise pistons and oiled components, they’re much higher-maintenance than their servo-electric and pneumatic counterparts. Hydraulic gripper upkeep can be advanced and may require expert technicians to keep up the oil, pump and reservoir. This highlights one other necessary purpose why pneumatic grippers are usually most popular over hydraulic grippers for collaborative functions: cobots are designed for simple operation by non-expert end-users, so including a posh hydraulic gripping system to a cobot will undermine the general system’s ease of use. 
Since they depend on air quite than fluids, pneumatic robotic grippers could be deployed in clear room environments. By comparability, hydraulic robotic grippers are too messy –particularly once they fail and leak hydraulic fluid into your work cell. 
Moreover, when it comes to value, hydraulic grippers are way more costly than their pneumatic counterparts. In case you are drawn to cobots partly due to their low value in comparison with conventional automation, then it does not make numerous sense to deploy a hydraulic gripper that might simply value greater than the cobot itself. 
Lastly, if accuracy is necessary to your collaborative software, then take into account that pneumatic gripping methods present higher accuracy than their hydraulic counterparts. Your gripper’s URCap software program and simple integration with Common Robots cobot vary ensures a continuing circulation of information that can be utilized to tweak your functions and processes, scale back downtime and enhance productiveness.
URCaps are particular software program packages designed to make sure clean programming and management of UR licensed end-effectors and elements. UR+ is a world ecosystem of elements, software program, and software kits which were validated and authorized to be mechanically, electrically and digitally suitable with cobots from Common Robots. UR+ hosts a wide array of pneumatic grippers from you to select from.
Pneumatic grippers simply win this robotic gripper showdown, however they’ve their very own limitations. For instance, as a result of they depend on pressurized air circulation, pressure management is just not as exact as that offered by electrical grippers. Offering a fragile grip will also be a problem for pneumatic methods because it’s exhausting to regulate the gripper at very low pressures. If an exterior air provide is required, this may add further value to your deployment. And whereas pneumatic grippers are appropriate for a lot of clear room functions, in the event that they fail, they will contaminate the air contained in the work cell. For these causes, some producers want to make use of electrical grippers for his or her materials dealing with wants.
UR+ is a one-stop-shop for pneumatic robotic grippers
Let’s check out a few of pneumatic robotic gripper choices accessible by means of UR+
The GRIPKIT-P Sequence from Weiss Robotics is a pneumatic gripper and dealing with system for Common Robots. The GRIPKIT-P system incorporates all the pieces finish customers have to arrange materials dealing with, meeting and machine tending duties inside minutes. For those who want excessive dynamics and gripping pressure with compact dimensions, GRIPKIT-P pneumatic grippers (in parallel or centric design) are superb.