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Vacuum Pad
Vacuum Pad Holder Resin Body Type
Ultra-lightweight, highly durable Vacuum Pad Holder with a resin body.
Options
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No copper-based metallic material is used in flow paths
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HNBR or FKM is used for the seal rubber material. *Some products are only compatible in the flow path.
Type & Price list
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Advantages
Ultra-lightweight 6.6 g
Weight down to 1/4 of current standard type.
Model code of the compared: VPC-M6-6-M6
Maximum payload: 1000 g
*Horizontal lifting is recommended.
Superior wear resistance and high durability
Using wear-resistant materials and PISCO's original polygonal shape (patent pending) as a rotation stopper reduces load during rotational motion of conveyance, thereby improving both wear resistance and durability.
Maximizes the robot’s available payload with its lightweight design.
This lightweight design does not overburden the robot's payload when using multiple vacuum pads on the EOAT.
2 options for the spring load.
L type: 0.5 to 1.0 N, H type: 1.0 to 2.0 N
-S3 specification (No copper-based metallic material used in flow paths) can be selected.
Suitable for applications requiring "low level ozone resistant".
Click here to learn about -S3 specification
Specifications
Chemical-proof properties
| S: Superior | Usable with little to no impact on the material. |
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| G: Good | Usable but may cause material degradation under certain conditions. |
| N: No good | Significant material degradation and use is not advised. |
*2. These are reference test values only. Be sure to evaluate performance on the actual equipment.
Port size
Vacuum port size
| Push-in fitting (mm) | φ1.8, φ2, φ3, φ4, φ6,φ1/8",φ5/32",φ1/4" |
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| Barb fitting (Tube O.D.xI.D.) (mm) | φ3xφ2, φ4xφ2.5, φ6xφ4,φ1/4"xφ0.18",φ1/4"xφ0.16" |
Construction
Ordering Information
Model Designation (Example)
Detailed Safety Instructions
Caution
1.Do not apply grease. This may cause the resin body to degrade.
2.Be sure to follow the instructions below when installing or maintaining the product. Otherwise, the product may become deformed and malfunction. (1) When installing Vacuum Pad Holder Resin Body Type, use a proper tool such as a wrench to engage part B indicated in the picture below. (2) When installing a vacuum pad to the holder or retighten the fitting, be sure to use a tool such as a wrench to secure part A indicated in the picture below. (3) Do not engage part C (the shaft) indicated in the picture below with a tool such as a wrench.
3.Please refer to the tightening torque in the table 1, 2, and 3 for thread tightening. Failure to tighten with the proper torque may result in product or tool damage, loosening of the threads, or leakage.
Frequently Asked Questions for Vacuum Pad Series
PISCO Vacuum Pad series consists primarily of the pad holder, vacuum pad, and pad screw, etc. in a combination.
Replacement vacuum pads are available if you like to replace just the vacuum pad with one of the same diameter. To replace the vacuum pad with one of a different diameter, please make sure that the following conditions are met before purchasing.
1. Pad screw size or pad connection type must be the same.
2. Accessories such as a pad screw, plain washer, and pad support that match the pad diameter also need to be purchased and replaced.
*) Please check the "Vacuum Pad Configuration" pages in PISCO catalog on PISCO website. If you have any questions, please contact PISCO sales office in your region.
Vacuum Pad Holder with a female thread option in "vacuum port size and joint type" allows for the replacement of the fitting with a different one.
Please check PISCO catalog to see if female thread options are available for the same holder type with your current Vacuum Pad Holder.
*)
VPMC holder does not have a female thread option due to structural reasons.
Also, VPMA and VPA holders (pad connection configuration code:H3, T8, or M4) do not have female thread options.
A sliding malfunction may occur if the key groove on the shaft (part "B" in the illustration below) becomes deformed, and the deformed area contacts the inner diameter of the pad holder.
This incident is a result of engaging a wrench on the shaft (part "A" in the illustration below) when installing the spring-loaded Vacuum Pad Holder on the equipment.
If this is the case, please replace Vacuum Pad Holder with a new one.
When installing Vacuum Pad Holder, please use a wrench or a similar tool to hold each of upper and lower bulkhead nuts and tighten them.
(Please be careful not to tighten the bulkhead nuts exceeding the proper tightening torque. If you apply too much torque, the bulkhead nuts may become deformed and cause a sliding malfunction.)
To install or remove Vacuum Pad, please engage a wrench or a similar tool on the hexagonal portion of the shaft.
[Video] Safety instructions on the installation of PISCO Vacuum Pad Holder (in Japanese only)
Basically, the pad rubber of Vacuum Pad is a consumable item, and it can get cracks by friction. Also, if NBR (nitrile rubber) is used in Vacuum Pad rubber parts, ozone-induced cracks may occur on these parts and cause Vacuum Pad to malfunction. (Ozone cracks)
Ozone cracks will form perpendicular to the stress orientation (the direction of forces such as tensile stress).
If the cracks look like the ones in the illustrations and pictures, they are likely ozone cracks.
Illustration of ozone cracks
Example of ozone cracks in nitrile rubber (NBR)
Sources of low-concentration ozone typically include equipment utilizing ultraviolet light or electrical discharge principles (such as cleaners, static eliminators, and air purifiers), motors, and dry air compressors. However, ozone concentration and generation frequency are not constant, and the degree of impact varies.
HNBR, FKM (fluorine rubber), EPDM, AU (urethane rubber), and VMQ (silicone rubber) are good ozone resistant materials. These pad materials are available for your consideration.
Yes, certainly. You can order just Bulkhead Nut. Please check the model codes in the table below.
If you cannot find the product you are looking for, please contact PISCO sales office in your region for assistance or contact us via the inquiry form.
(1) and (2) in the model code of Bulkhead Nut indicate the following: (1) the major diameter from the bulkhead thread size (from the "M" column of the outline dimension table under Dimensional Drawing on PISCO website product pages) and (2) the thread pitch.
*Outline dimension tables are on PISCO website brief product summary pages.
(Accessing a type such as "Bulkhead Union PM" via the link on PISCO website product page will take you to its brief product summary page.)
For more information, please check the example illustrated below the table.
| Product series | Used for | Model code of Bulkhead Nut |
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PM16, PMF16 |
PM16: MN28P1.5 |
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PM and PMF other than the above |
MNF(1)P(2) |
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PMP, PML |
MN(1)P(2) |
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PM3M, PM4M, PM1/8M |
MN(1)P(2) |
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PM6M, PM1/4M |
MNF(1)P(2) |
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LM-FM5 |
MN10P1 |
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SSPM NSMC, NSM, NSMF, NSMFF |
SMN(1)P(2) |
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SPMF, SPM, SPML |
MN(1)P②-SP |
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PPMP |
MNP(1)P(2) |
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KM |
MN(1)P(2) |
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NKMF |
MN(1)P(2) |
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PSM |
PSM4M-4: MN10P1 |
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MKR |
MNF(1)P(2) |
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CPSE3M-4, CPSE7M-6 |
CPSE3M-4: CPS340M02NI |
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BVM, BVLM |
MNF(1)P(2) |
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BVM, BVLM |
MNF(1)P(2) |
[Example] PM6
Brief product summary page
Digital Catalog
Even with the same tube size, the bulkhead thread sizes (M) will differ depending on the product.
Please refer to the outline dimension table of your preferred product.
Please refer to the tightening torque table of each series in "Common Safety Instructions for Fittings" or "Common Safety Instructions for Vacuum Pad (Suction cup)" on PISCO website.
If Vacuum Pad is the source of the suction marks, the additives used in Vacuum Pad materials may have bled or bloomed onto the pad surface and transferred to the workpieces. PISCO Vacuum Pad Mark-free Type is developed for conveyance of LCD glasses and conveyance of workpieces in the semiconductor production equipment. Its resin pad is less prone to bleeding or blooming compared to vulcanized rubber, making it highly effective for preventing suction marks.
However, if suction marks are caused by environmental factors, such as dust or stains on the surrounding area or workpieces, rather than by Vacuum Pad, then other countermeasures are needed.
The maximum operating temperature limit depends on the material used. It is 60℃ for urethane rubber, 110℃ for nitrile rubber, and 230℃ for fluorine rubber. (Please refer to PISCO catalogs for the maximum operating temperature limit of other rubber materials.)
The aforementioned maximum operating temperature limits are allowed only for an instant. Please exercise caution If you need to use PISCO Vacuum Pad at the maximum operating temperature limit for a certain amount of time.
First, please check the product name (and if you have already made a choice, its model code). Also, check the proper name of the chemical to be used.
Then, check the chemical-proof properties of the materials used in your chosen product via the following link, "Chemical-proof properties".
The possible causes for shaft failures are as follows.
1. The bush was deformed due to excessive tightening of the bulkhead nut during the installation of Pad Holder.
2. The key groove on the shaft was deformed due to the wrench being improperly engaged on the outer hexagonal column of the shaft during the installation of Pad Holder.
*) For the recommended tightening torque according to pad diameter as well as the related safety instructions, please refer to the “Common Safety Instructions for Vacuum Pads” on PISCO website.
The spring force of Vacuum Pad Holder can be customized as a special order. Please contact PISCO sales office in your region for details.
*) Please note that we may not be able to accommodate your request for the desired spring force.
Yes, it is.
For standard holder types such as VPC and VPD, the shaft rotation stopper gets settled in the key groove of the shaft to prevent rotation.
For mini holder types such as VPMC and VPMD, the shaft has hexagonal features to prevent its rotation.
Installing a fall prevention valve on each Vacuum Pad can minimize the decrease in the suction force (vacuum level) when some units of Vacuum Pad are not suctioning.
However, the fall prevention valve does not completely interrupt the air circuit and allows a slight amount of atmospheric air in. Depending on how many Vacuum Pad units that are not suctioning, the vacuum level needed in the circuit may not be achieved.
Also, please exercise caution when using multiple units of Vacuum Pad to suction one workpiece, as this may cause the workpiece to lose balance, leading other units of Vacuum Pad to come off.
[Video] Fall Prevention Valve
Vacuum Pen (both VTA and VTB) has a vacuum generator incorporated in its pen-shaped body and creates a vacuum (suction) with a supply of compressed air.
For Vacuum Pen without a built-in valve (VTA type), vacuum (suction) is constantly created with a supply of compressed air.
Resting your index finger over the hole near the tip of the pen body can increase the vacuum level for suction of a workpiece. Removing your index finger from the hole allows atmospheric air in, reducing the vacuum level and releasing the workpiece.
For Vacuum Pen with a built-in valve (VTB type), the flow of compressed air supplied is stooped at the tip of the pen body where the button is located. Pressing the button allows compressed air to enter the vacuum generator and creates a vacuum (suction). It is an energy-saving specification since air consumption can be reduced when Vacuum Pen is not in use. Disengaging the button releases the workpiece.
[Video] Introduction of Vacuum Pen
Watch the video at 01:17 for VTA (without a built-in valve)
Watch the video at 01:58 for VTB (with a built-in valve)
PISCO Vacuum Pad Standard type is used for Vacuum Pen at its tip. If you'd like to purchase and replace Vacuum Pad only, please select the pad diameter from φ1, 2, 4, 6, and 8 mm and the rubber material of your preference from the "Parts" list in PISCO catalog on PISCO website.
Model code: VP (1) R (2)
(1) Pad diameter: 1, 2, 4, 6, and 8 mm
(2) Pad rubber material: N (Nitrile), S (Silicone) or NE (Conductive NBR, low resistance type)
*R means Vacuum Pad Standard type
(Example) Model code of 2 mm diameter Vacuum Pad, Nitrile rubber material: VP2RN
*) If you need to replace Vacuum Pad for Vacuum Pen with anti-static black body color (EG), please select "NE (Conductive NBR, low resistance type)" for the pad rubber material.
(Example) Model code of 4 mm diameter Vacuum Pad, Conductive NBR rubber material: VP4RNE.
Apart from the aforementioned, you can also use PISCO Vacuum Pad with the connection configuration code H3 and T8.
Moreover, you can have more options for Vacuum Pad if you are open for changing Pad Holder (metallic part at the tip of Vacuum Pen) type.
Please see below for details.
Vacuum Pen with Pad Holder type and Vacuum Pen Package set use the following types of Pad Holder. Please check the model code in the table.
Other types of Pad Holder not mentioned above are also available.
Applicable pad diameter: up to φ50 mm, Pad type: 11 types
You can just replace Pad Holder and attach it to your Vacuum Pen.
Please see below for details.
Please refer to the inner diameter of Vacuum Pad to determine the minimum diameter of a workpiece that can be suctioned by Vacuum Pen.
| Vacuum Pad size | Vacuum Pad I. D.* |
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φ1 mm |
φ0.5 mm |
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φ2 mm |
φ0.6 mm |
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φ3 mm |
φ0.8 mm |
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φ4 mm |
φ1.2 mm |
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Without Vacuum Pad (Pad Holder only) |
φ1.6 mm |
*) The minimum diameter of a workpiece that can be suctioned is the pad inner diameter.
The inner diameter of Pad Holder for Vacuum Pen is φ1.6 mm. However, the aforementioned Vacuum Pad, ranging in size from φ1 to 4 mm, each has an inner diameter smaller than φ1.6 mm. Therefore, the minimum diameter of a workpiece that can be suctioned is smaller than φ1.6 mm as in the table above.
The inner diameter of Vacuum Pad sized φ6 and 8 mm is greater than that of Pad Holder (φ1.6 mm). Therefore, they are suitable for suctioning workpieces larger than φ1.6 mm.
Please note that the calculation is based on the dimension. The actual allowable diameter may differ depending on the workpiece to be suctioned. Please evaluate the product under the actual operating conditions for your final decision.
Please read the instruction manual of Vacuum Pad Trial Kit or see the how-to video below.
*For English, refer to the product catalog on PISCO website. Please contact PISCO sales office near you for further information.
[Video] How to assemble Vacuum Pad Trial Kit (in Japanese only)
This specification does not use copper-based materials, making it ideal for processes and operating environments where copper should be avoided.
For the "-S3 spec.", no copper-based materials are used for the metal parts, and the seal rubber material is HNBR or FKM. More specifically, we offer “-S3 spec.” products that use stainless steel for the metal parts in flow paths instead of brass.
"-S3 spec." may be available as standard rather than optional and not be indicated in the model designation.
(Ex.) Tube Fitting SUS 304: the metal body is SUS304, and the seal rubber material is FKM.
There are two ways to measure pressure: absolute pressure and gauge pressure.
Absolute pressure
Absolute pressure is measured in respect to the absolute zero pressure, which is a perfect vacuum.
It is commonly used to measure the pneumatic flow rate, etc.
Absolute pressure is denoted with “abs” at the end of the pressure unit. (Ex. 10 kPa abs)
Gauge pressure
Gauge pressure is zero referenced against ambient atmospheric pressure at a location and time of measurement.
It represents how much pressure is applied to an area of 1 cm2 based on atmospheric pressure. It is commonly used for indication of the manometer. The pressure above the ambient atmospheric pressure is called “positive pressure”, and the pressure below the ambient atmospheric pressure is called “negative pressure”.
The torr is a unit of pressure/vacuum measurement that was widely used before the pascal (Pa) and hectopascal (hPa) in the International System of Units (SI) were introduced. (Absolute vacuum is 0 torr, and standard atmosphere is 760 torr)
The torr, also known as the “millimeter of mercury (mmHg)” is a non-SI unit of pressure that is still being used in many fields.
1 Torr = 133.32 Pa
1 atmospheric pressure = 1013 hPa = 1.01325 x 105 Pa = 760 Torr
*) 1 pascal is 1/100th of hectopascal used in weather forecasting.
Inquiries about this product
It is also possible to suggest products suitable for various conditions such as applications and functions. Please feel free to contact us or visit the nearest sales office.
The following are frequently asked questions. Please check before making inquiries.
