JACKET AND/OR INSULATION STRIPPING - DESCRIPTION AND OPERATION

** ON A/C NOT FOR ALL

1. General

A. Procedure

(1) Use this procedure for stripping the jacket and/or insulation from wire and coaxial cables used on commercial aircraft. Authorization for the specific type of wire, or cable, to be stripped, is controlled by the engineering drawing.

(2) Where the instructions contained differ from the engineering drawing, the drawing instructions shall prevail.

(3) Any differences between this document and the engineering drawing shall be reported to the Rohr Corps. Engeneering Group for resolution.

(4) Reference Information
(See Table 1)

-------------------------------------------------------

! REFERENCE ! DESCRIPTION !

!---------------!-------------------------------------!

! 70-71-42 ! Connector Boot Part Numbers

! 70-71-44 ! Connectors Insert Arrangement !

-------------------------------------------------------

(5) Tools and Equipment: Table 2 (Sheet 1)
(See Table 2 (Sheet 1))

NOTE: Equivalent substitues may be used instead of the following items.

---------------------------------------------------------------------

! REFERENCE ! DESCRIPTION ! VENDOR ! FSCM !

!------------!-------------------!-------------------------!--------!

! Model 2A ! Knife, Thermal ! Freeport Marine Supp ! V84594 !

! ! (used with M10) ! 47 W Meric Rd. ! !

! ! ! Freeway, NY 11520-3709 ! !

! ! ! ! !

! M10 ! Power Supply ! ! V84594 !

! ! (used with Model ! ! !

! ! 2A) ! ! !

! ! ! ! !

! MS3191-1 ! Crimp Tool ! Commercial ! !

! ! ! ! !

! MS31919-1 ! Crimp Tool ! Commercial ! !

! ! ! ! !

! 16A ! Locator, (use ! Commercial ! !

! ! with MS31919-1 ! ! !

! ! and MS3191-1 ! ! !

! ! crimp tool) ! ! !

! ! ! ! !

! 20A ! Locator, (use ! Commercial ! !

! ! with MS31919-1 ! ! !

! ! and MS3191-1 ! ! !

! ! crimp tool) ! ! !

! ! ! ! !

! 300B Pico ! Crimp Tool, ! Pico Crimping Tools ! V29268 !

! ! Pneumatic ! Co. 9832 Jersey Ave. ! !

! ! ! Santa Fe, Springs, ! !

! ! ! CA 90670-3139 ! !

! ! ! ! !

! STD. 16 ! Locator, (Use ! ! V29268 !

! ! with 300B), ! ! !

! ! Size: 16 ! ! !

! ! ! ! !

! STD. 20 ! Locator, (Use ! ! V29268 !

! ! with 300B), ! ! !

! ! Size: 20 ! ! !

---------------------------------------------------------------------

(6) Tools and Equipment
See Table 2 (Sheet 2)

---------------------------------------------------------------------

! REFERENCE ! DESCRIPTION ! VENDOR ! FSCM !

!------------!-------------------!-------------------------!--------!

! 314DA- ! Locator, (use ! ! V29268 !

! N.049 ! with 300B), ! ! !

! ! Size: 16 ! ! !

! ! ! ! !

! 314DA- ! Locator, (use ! ! V29268 !

! N. 038 ! with 300B) ! ! !

! ! Size: 20 ! ! !

! ! ! ! !

! 45-059 ! Wire Stripper ! Ideal Industries Inc, ! V30119 !

! ! ! Becker Place, Sycamore, ! !

! ! ! IL 60178 ! !

! ! ! ! !

! L-4421 ! Blade ! ! V30119 !

! ! (Replacement) ! ! !

! ! (use with L-4421) ! ! !

! ! ! ! !

! No specific! Scissors ! Commercial ! !

! ! ! ! !

! No specific! Utility Knife ! Commercial ! !

! ! ! ! !

! No specific! Blade Screwdriver ! Commercial ! !

---------------------------------------------------------------------

** ON A/C NOT FOR ALL

2. Stripping Practices:

A. Procedure

The amount of insulation or jacket to be stripped from a wire, or a cable, is dependent upon the type of wire, and the configuration of the termination to be used. Refer to the applicable connector assembly for strip dimensions and termination procedures.

(1) Check stripped conductor, and inside of the insulation that is stripped off, for severed conductor strands. Refer to Table 3 for allowable number of cut strands. Nicked strands shall be considered severed. Slight scrapes on the strand plating shall be considered as acceptable. Slight gripper marks on the insulation next to the stripped conductor shall be considered acceptable. No shield damage is permitted.

CAUTION: WHERE MULTIPLE LAYER INSULATION IS TO BE STRIPPED, CAREFULLY INSPECT

THE STRIPPED CONDUCTOR TO BE SURE THAT ALL LAYERS OF THE INSULATION

ARE STRIPPED OFF,AND THAT THERE IS NO INNER INSULATION LEFT ON THE

CONDUCTOR.

(2) Stripping tool adjustments and modifications must be made by the authorized tool control department. If the stripper does not operate properly, return it to the control department for repair of replacement.

(3) Blade type strippers shall be used for stripping the wire or cable insulation. If a stripper is not available that will handle the larger wire sizes, a sharp knife or razor blade may be used. Thermal strippers shall not be used.

(4) When stripping a wire with a woven outer insulation that is subject to fraying, install a suitable heat-shrinkable sleeve over the end to be stripped, or paint the area with Glyptol and let dry. Either methol will prevent the outer installation form fraying.

(5) Only when specified on the engineering drawing, the wire may be "step-stripped" to allow the installation of oversize wire into the rear insert of the connector. If step-stripping is required, strip and follows:

(a) Strip the wire in the normal manner to the specified length.

(b) Remove the additional specified layer(s) of insulation to the length required to clear the under-sized hole in the rear insert of the connector.(Fig.1)

Longitudinal Cut for Stripping ** ON A/C NOT FOR ALL

(c) When the specific stripping function is not specified on the engineering drawing, reduce the insulation outside diameter only enough to permit proper installation of the oversized wire.

NOTE: If the above noted situation exists, obtain approval of the Rohr Corps. Electrical Engineering Group before stripping.

(6) Step-stripping may be accomplished as follows:

(a) Make a circumferential cut through the outer layer of insulation by using an oversize stripping hole in a blade type hand stripper, (for example, a 16 gage hole to strip the outer installation from a 20 gage wire) or by using a sharp knife.

CAUTION: DO NOT DAMAGE THE UNDERLYING INSULATION.

(b) Remove the insulation by hand. If necessary, make a longitudinal cut almost through the insulation, and peel of the insulation.

Longitudinal Cut for Stripping ** ON A/C NOT FOR ALL

(7) Hand strippers for 24 through 10 gage wire:

(a) The following instructions apply when using hand strippers on small gage wire:

1 Before stripping wire, examine the stripper for proper alignment. Sample strip an adequate number of wires to ensure that the tool is functioning properly.

NOTE: This is the Operator's responsibility.

2 Approved stripping tools are listed in Tables 4 and 5. All stripping tools must be approved by the Electrical Engineering Group, and the Materials and Processes Department.
PERMISSABLE CUT STRAND LIMITATIONS

a Severe strand limitation
See Table 3

--------------------------------------------

! COPPER WIRE GAGE ! NUMBER OF CUT STRANDS !

!------------------!-----------------------!

! 24 THROUGH 12 ! 0 !

! 10 ! 2 !

! 8 THROUGH 4 ! 4 !

! 2 ! 12 !

! 1 ! 16 !

! 1/0 - 2/0 ! 20 !

! ALUMINUM WIRE ! 0 !

--------------------------------------------

3 To prevent damage, and prolong the service life of the Ideal Stripmaster and Custom Stripmaster hand tools, the following practice is recommended when the strippers are not in actual use. This is particularly important when returning the strippers to a tool box or to the tool crib.

a Close the stripper handles so that the blades and gripping jaws are closed.

b Secure the handles in the closed position with an elastic band, or with a plastic mechanical strap.

Wire Stripping Tool ** ON A/C NOT FOR ALL

(8) Operation of the Ideal Stripmaster wire stripper

(a) The Stripmaster wire stripper, as illustrated in Figure 5, is a hand operated stripper that automaticly returns to the open (start strip) position. To operate this stripper, proceed as follows:

1 Establish the proper strip length by reference to the RPS applicable to the equipment in which the wire is to be terminated. If no RPS is available for the application, measure the solder pot, wire well, or crimp to determine the proper length.

2 Place the wire in the slot in the stripper knife that will properly strip the wire size.

Wire Stripping Tool ** ON A/C NOT FOR ALL

NOTE: The wire size stamped at each position on the stripper knife will not always be the proper size for the wire being stripped. Test strip several piece of wire to make sure that the slot in the stripper knife will od a clean stripping job without damage to the conductor.

a Stripping Tool Selection
See Table 4

----------------------------------------------------------

! STRIPPING ! WIRE ! NUMBER ! PART ! REPLACEMENT !

! TOOL ! GAGE ! OF ! NUMBER ! BLADES !

! (HAND) ! ! HOLES ! ! PART No. !

!-------------!----------!--------!--------!-------------!

! STRIPMASTER ! 8 TO 12 ! 3 ! 45-090 ! L-4419 !

! (IDEAL) ! 10 TO 18 ! 4 ! 45-091 ! L-4420 !

! ! 10 TO 22 ! 6 ! 45-092 ! L-4421 !

----------------------------------------------------------

b Stripping Tool Selection
See Table 5

------------------------------------------------------------------------------

! STRIPPING ! WIRE ! NUMBER ! PART No. ! PART No. ! REPLACEMENT !

! TOOL ! GAGE ! OF ! W/O STOP ! WITH STOP ! BLADES !

! (HAND) ! ! HOLES ! LATCH AND ! LATCH AND ! PART No. !

! ! ! ! WIRE STOP ! WIRE STOP ! !

!----------------!----------!--------!-----------!-------------!-------------!

! CUSTOM ! 10 TO 14 ! 3 ! 45-170 ! 45-180 ! L-5210 !

! STRIPMASTER ! ! ! ! ! !

! (for standard ! 16 TO 26 ! 6 ! 45-171 ! 45-181 ! L-5211 !

! TEFLON WIRE) ! ! ! ! ! !

! (IDEAL) ! 26 TO 30 ! 3 ! 45-172 ! 45-182 ! L-5436 !

------------------------------------------------------------------------------

3 Squeeze the handles of the stripper. The stripper blades will close and cut almost through the insulation, then the insulation off of the conductor.

4 In order to prevent kinks, or splaying of the conductor strands, continue to squeeze the stripper handles until the automatic "stop return" devie clicks into place. This hold the stripper open until the gripper jaws release, allowing removal of the stripper wire.

5 A light pressure on the "stop return" device will release it, allowing the tool to return to the open, "start strip" position.

6 Check the stripped wire for damage to the insulation where the grippers held the wire.

7 Check inside of the stripped insulation to see that strands have been cut and left in the insulation.

8 Check the stripped conductor for cut or scraped strands.

NOTE: Tools should be checked frequently, by the user, th ensure proper operation. Faulty tools should be returned to the Tool Control Department for repair or replacement.

(9) Ideal Custom Stripmaster wire Stripper:

Custom Stripmaster ** ON A/C NOT FOR ALL

(a) The Custom Stripmaster is quite similar to the Stripmaster. The main difference is in the cutting blades. Where Stripmaster has knife type blades, the Custom Stripmaster had die type blades that lend themselves toward stripping harder, slicker, teflon insulation.

** ON A/C NOT FOR ALL

3. Quality Assurance

A. Procedure

The wire stripping operation shall be checked for the following characteristics:

(1) Check compliance with the applicable connector, or termination RPS for the proper strip length. If not available, the stripped wire may be inserted in the solder pot, crimp pot, or crimp barrel of the termination in use, to see if adequate stripped conductor length is extending from the insulation.

(2) Check for compliance with the requirements of these instructions.

(3) Inspect the stripped wire for cut or nicked strands. For the allowable number of cut or nicked strands, see Table 2.

(4) Inspect the wire insulation where the gripper of the stripping tool held the wire during the stripping process. Minor indentation is acceptable. Major indentation and tears in the insulation are cause for rejection.

[Rev.10 from 2021] 2026.04.01 02:19:14 UTC