CORD GRIPS » EMI / RFI Cord Grips

Overview Advantages & Applications How They Work Selecting Specifications PG Specs NPT Specs

Selecting

To begin selection and specification of TOR-SPRING™ EMI/RFI Cord Grips, first determine and define the following requirements for each application:

  • Cable Jacket's Outer Diameter
  • Braided Shield's Outer Diameter
  • Enclosure/Housing Wall Thickness
  • Cable Entry, Opening Thread Type/Size (When Pre-Determined)
  • Environmental Factors and Conditions, ie.
  • Indoor/Outdoor Use, Temperature Range, Presence of Chemicals, Vapors and Gases

Selection Options

TOR-SPRING™ EMI/RFI Cord Grips are offered in PG and NPT Thread Types in a wide range of sizes. PG Type Cord Grips are available with different combinations of Insert materials (PVC or Santoprene) and Body Styles (See Page 39). NPT Type Cord Grips feature PVC Inserts and one standard body style (See Page 39). These selection options provide the capability to optimize a Cord Grip's configuration to suit an application's particular design requirements. TOR-SPRING™ Cord Grips with PG Thread Sizes are found on pages 36 and 37 while NPT Thread Sizes are listed on Page 38.

How to Select/Specify TOR-SPRING™ Cord Grips

Follow these (7) easy steps to correctly select and specify EMI/RFI TOR-SPRING™ Cord Grips

1. Obtain the Outside Diameters of the Cable Jacket and Braided Shield from either the cable manufacturer or by taking measurements from the actual cable to be used.

2. Choose the Insert Material, either Polyvinylchloride (PVC) or Santoprene (STP) best suited for your application. Note: NPT Sizes are only available with PVC Inserts.

3. Based upon the application's requirements, determine the Cord Grip's external thread type, size and length needed. Body size, external thread length and other relevant dimensions for PG and NPT Sizes are found on Page 39. PG Size TOR-SPRING™ Cord Grips are available in (2) distinct Body Styles and provide a broader range of sizes when compared with the NPT Sizes. Subsequently, PG Sizes accommodate a greater range of Cable and Shield Diameters. This expanded range makes them the first selection choice for both US and European Cabling. Depending on Thread Type selected, follow either Step 4. or Step 5. indicated below.

4. All PG Size TOR-SPRING™ Cord Grips listed on Page 37 utilize the preferred method of cable preparation which involves Segmenting the Cable Jacket.

4a. Using the dimensional information found on Page 39, select the Body Style A or B which best satisfies your application requirements for external thread length and overall body size.

4b. Referring to the Cable Dia. and Style Column Listings on Page 37, find those diameter ranges that will accept the Cable Jacket Outer Diameter.

4c. Next, verify that the corresponding Shield Dia. Range will accommodate the Braided Shield Outer Diameter. If both the Cable and Shield Diameters fall within the given ranges, select the respective Cord Grip Type and Cat.No.

4d. Should the Cable Shield Diameter fall outside of the listed Shield Dia. Range, it will be necessary to select a larger or smaller size TOR-SPRING™ Cord Grip PG Size so that both the cable and shield diameters fall within the listed ranges.

4e. If none of the Cable and Shield Dia. Ranges listed will accommodate the cable, make your TOR-SPRING™ Cord Grip selection from the PG Sizes listed on Page 36 and utilize the alternate cable preparation method involving Stripping the Cable Jacket from the Cord Grip attachment point to end of the cable.

4f. From the external thread of the selected PG Size TOR-SPRING™ Cord Grip, choose the corresponding special design, PG Size EMI/RFI Locknut from the listing found on Page 59.

5. The NPT Size TOR-SPRING™ Cord Grips listed at the bottom of Page 38 use the preferred method of cable preparation which involves Segmenting the Cable Jacket.

5a. Referring to the Cable Dia. Column Listing on the bottom of Page 38, find the diameter range that will accept the Cable Jacket Outer Diameter.

5b. Next, verify that the corresponding Shield Dia. Range will accommodate the Braided Shield Outer Diameter. If both the Cable and Shield Diameters fall within the given range, select the respective Cord Grip Type and Cat. No.

5c. Should either the Cable or the Shield Diameters fall outside the listed ranges, select the TOR-SPRING™ Cord Grip from the list of additional NPT sizes found on the upper part of Page 38 and utilize the alternate method of cable preparation involving Stripping the Cable Jacket from the Cord Grip attachment point to the end of the cable.

5d. If none of the NPT Sizes will accommodate the Cable and Shield Diameters, it will be necessary to select and use the appropriate PG Size as an alternate.

5e. When an NPT Size TOR-SPRING™ Cord Grip will be used, select the corresponding standard design Nickel Plated Brass Locknut from the listing on Page 58.

6. From the Mtg. Hole Dia. Column and the TOR-SPRING™ Cord Grip Size chosen, obtain the dimension of the clearance hole to be drilled or machined into the enclosure/housing.

7. Follow the TOR-SPRING™ Cord Grip Installation Instructions given on Page 36.