SKINTOP® Strain Relief Cable Glands
A: 2-D Drawings can be requested through your sales representative.3-D drawings are available for customers to download through the Lapp Group CAD website.
A: Certificates can be requested through any Lapp North America sales representative by calling 800-774-3539 or filling out the contact form.
A: UL #E146370, #E79903
For additional approval documents, please contact your Lapp North America sales representative.
A: Click here to download the SKINTOP® Polyamide Style Cable Gland Technical Data Sheet
A: For information regarding the drill hole size and other related product dimensions, click here
Click here to consult the SKINTOP® Cable Glands torque values.
To prevent damage of the outer sheath, please note that different cable materials require various torque values.
A: UV test requirements are completed according to the UL 514B test specifications.
Black glands are recommended for UV applications, as color retention is not an issue. Other colors have a tendency to fade over time; however, physical performance will remain unaffected.
A: SKINTOP® glands that are UL listed meet the minimum 35 pound UL pull test requirement.
A: In reference to SKINTOP® glands, PSI, Pounds per Square Inch, refers to the amount of water pressure that is sprayed directly on the cable gland without any leakage.
A: Within the static temperature range, both the SKINTOP® and cable are not subjected to movement, including possible vibration.
The dynamic value listed refers to slight movement of the cable, as tested under the IP and UL test conditions and procedures.
A: Non-metallic SKINTOP® SL/SLR, PG 36-48 and SKINTOP® SLM/SLRM, Metric 40-63 come standard with an o-ring to ensure the listed IP 68 rating. Metal SKINTOP® glands come standard with an o-ring.
A: O-rings are typically not required with NPT glands, as the tapered threads are typically screwed into corresponding NPT fittings until the tapered threads lock. For through-hole, knockout applications, the straight-thread of a PG or Metric gland is preferred and can be supplied with an o-ring.
A: Locknuts are typically not required with NPT style glands, as the tapered threads are usually screwed into corresponding NPT fittings. For through-hole, knockout applications, the straight-thread of a PG or Metric gland is preferred and is standardly provided with a locknut.
Please note NPT locknuts can be ordered separately.
A: SKINTOP® ST cable glands were developed and patented by Lapp Kabel in 1977. The design of the SKINTOP® ST was therefore the first of its kind, all other manufacturers on the market have now adapted the design to suit after the patent had run out. Even today, you can still find the one and other application at our customer applications were SKINTOP® cable entries are still in use and that have been in service since 25 years. Unfortunately, we have no documented endurance test on specific applications. If the cable gland in the interior, is not subjected to any dramatic climatic changes, or mechanical loads, a long service life is a matter of course. A cable gland used, for example, outdoors means that it is difficult to make any general statement hereto, because products are subjected to changing weather factors However, our SKINTOP® ST / ST-M has been used for years in numerous, renowned solar industry manufacturers, e.g. on solar boxes, without any problems.
At the following link both our customers and ourselves can create a LOG IN account, free of charge, for our 3D database: http://lapp.partcommunity.com/PARTcommunity/Portal/lapp Downloads of the 3D-drawings are all up to date, and they can be downloaded free of charge in various 3D formats. Customer benefit: Direct integration of products into the design drawings and part lists saves time and money. Better planning improves the functional reliability throughout the entire process chain.
A: Polyamide customized versions are generally possible, but they have to be checked in individual cases. Behind each customized version with deviating size there is an expensive tool, which is only profitable for large volumes (generally >100,000 items per size and year). Special colors can in turn be realized from small volumes upwards without approvals (generally > 5000 units per size and order). Brass customized versions can also be realized in small volumes. However, in order to achieve an economic part price a quantity of at least 1000 items per order should be considered.
A: The values listed in the catalogue and on the package insert are recommended guide values, with which we have achieved our approvals (VDE, UL). Testing is conducted in accordance with VDE although a plug gauge is used, which permits higher tightening torques than are generally required for cables and wires. Practical example: If a soft silicone cable is installed, an excessively high tightening torque can lead to damage quicker than the case would be when a robust rubber cable is used.
A: For DIX inserts a deviation of minus 2-3 tenths (-0.2 to -0.3 mm) is possible. In other words, at 3.7 mm a 4 mm hole can still cover it up. This depends however, on the packing density. If, e.g. one has 8 holes each at 4 mm with a 3.7 mm cable, then the domed cap nut has to be really tightened to compensate for any deviation. This should be tested on a case-related basis, insofar as the nominal diameter is not given and the deviation is too large, as the degree of protection must also be considered. If the degree of protection here is IP55 and not IP68, the theoretical margin is greater. For cables with, e.g. 4.4 mm one will have problems alone in trying to insert the cable into a 4 mm hole. Customized DIX-M inserts are available from a minimum quantity of > 5000 units.
A: Clamping range (cable diameter used) – be as close to upper maximum as possible. If usable, always offer the smallest-possible cable gland (saves also money for customer). Connection thread – For PG inquiries refer to METRIC (The PG standard has been invalid since March 2001, whereupon the conversion to metric components occurred). Exceptions hereto are maintenance and service, or use outside the scope of the EN 50262 standard. IP degree of protection – Generally, the higher it is, the better it is. Temperature ranges – Static means that the installed cable is firmly fixed into place. Dynamic means that he installed cable can be moved. SKINTOP® STR / STR-M – R stands for a reduced, in other words, narrower sealing insert, to enable even smaller cable diameters to be inserted. UV resistance – All versions in black are UV resistant and therefore they can be used outdoors, the UL514B standard is also testing UV resistance. Sometimes customers require an additional UL F1 outdoor rating, here only SKINTOP® SOLAR (plus) can be offered.
A:UL94 refers to a flame-retardance property classification for accessory products. A differentiation is made here as follows:
UL94 HB – Horizontal fire test
UL94V-2 – Maximum burning duration 30 seconds (then self-extinguishing), drop formation permitted
UL94V-0 – Maximum burning duration 10 seconds (then self-extinguishing), drop formation not permitted
Drop formation always goes hand in hand with the risk of fire propagation.
Note: If a cable is sold in accordance with IEC 332.3 (e.g. ÖLFLEX® CLASSIC 110H), which passes the major bundled fire test and which is extremely flame-retardant, then as part of the cross selling it is practical to also offer UL94V-0 classified products (SKINTOP® ST-HF-M, SILVYN® RILL PA6, etc.).
A: At this moment in time, China does not require CCC approval for imports; this is currently not scheduled (not yet). Aside of this the Russian Confederation does also not require a GOST approval for imports.
A: The gland body on our SKINTOP® ST / ST-M comes with a connection thread (below the hexagon) and a function thread (above the hexagon). This function thread is also known as a multiple trapezoidal thread. It contains 2 thread entries to enable a straight seating and fast closing of the domed cap nut. If one cuts through this thread lengthwise and views the cross-section, a trapezoidal shape can be detected. This trapezoidal shape offers an enormous mechanical stability, which in turn enables extremely high tightening torques. This is a tremendous advantage when in rough industrial environments and when assembling. If a fitter, e.g. screws the gland too tightly, the thread will be unable to over tighten, or jump.
A: Machines and installations are subjected to vibrations caused by motor operation. These vibrations can cause the domed cap nut to work its way loose. Because the fastening of the installed cables is effected through the domed cap nut's compressed segmented cage, when the domed cap nut is opened the standard required strain relief is no longer given. The vibration control ensures that the domed cap nut remains firmly seated even when subjected to strong vibrations.
A: In the end of the sixties the German Industrial Standard DIN 46320 was introduced. This standard was a pure design standard for cable glands and accessories like lock nuts, etc. As a result every cable entry and accessory looked homogeneous, in other words nearly similar. However, back then, our cable entries set themselves apart from other competitors. We used the brand name (SKINDICHT®), while other manufacturers mainly used the official, complex standard designations for their products (e.g. C4 PG11x6-11). The gland bodies were made of brass (nickel-plated), the sealing to the cable was usually realized through a sealing cone or variable slotted sealing ring (cf. onion ring). Strain relief was provided through saddle clamps. Disadvantageous however was that the majority of versions only fulfilled a low IP degree of protection, and that an extreme amount of time was required for assembly.
In 1977 Lapp Kabel invented the SKINTOP® design, manufactured by injection molding technology. This new method meant that the gland body was suddenly a great deal less expensive than a turning-workpiece made of nickel plated brass. In addition to this, the flexible lamella gasket system enables a far greater clamping area to be covered. This in turn led to significant savings being made on the customer side, something that during the course of the years has made us and SKINTOP® market leader.
A: Following its market launch the demand for this innovative solution was extremely high. To underline the safety and functionality of the new type of cable entry, it was originally tested and approved by SEV (electrosuisse – Association for Electrical Engineering, Power and Information Technologies) and VDE (Association of German Electrical Engineers). This was promptly followed by UL and CSA approval, which then permitted the use on global focus markets. During the course of the next few years our SKINTOP® cable entry underwent constant improvement, to match our customers' requirements and the challenges presented by new systems. Along with a multiple trapezoidal thread, vibration control and integrated sealing lips it was also equipped with an ergonomically-shaped dome cap nut, which made assembly in an environment covered in machine oil so much easier. Today too, the approvals for our SKINTOP® cable entry are all kept "up to date". Depending on the particular version involved, they are the only cable entry on the market to comply with up to 9 approvals and guidelines.
A: VDE (EN 50262) – Metric cable gland standard - For use in machines and systems in Europe.
UL (UL514B) – US cable gland standard - For use in machines and systems in the USA.
CSA (UL514B) – Canadian cable gland standard - For use in machines and systems in Canada.
DNV – For use in ship building as well as in mobile offshore units (e.g. wind parks).
TüV GGVS – Approval for truck vehicle engineering (German Law on the Road Transport of Hazardous Goods)
ATEX (EN 60079) – Approval for dust and gas explosion endangered areas (e.g. mills, silos, service stations, etc.)
IP69K (DIN 40050) – For machines and installations that are cleaned with high pressure (car washing installations, food industry, etc.)
REACH (2002/95/EG) – Directive governing registration, evaluation, authorization and restriction of chemicals
RoHS (EG no. 1907/2006)– Directive governing restriction on use of hazardous substances
CE (EG Directive 94/9/EG) – Fulfills low voltage guideline