ASME B107.37-2003 pdf free download.PLIERS: WIRE CUTTERS/STRIPPERS
(u) Class 1, for general-purpose insulation, shall be capable of removing a minimum of 0.75 in. of insulation from general-purpose solid and stranded copper wire. Strippers shall consist essentially of a body, handles, stripping blades, serrated gripping jaws, and automatic stop return, and be similar to Fig. 1. Pliers shall be equipped with blades conforming to one of the sizes specified in Table 1.
(1) The stripping blades shall have a sufficient num- ber of adequately spaced grooves to accommodate the range of wire sizes specified in Table 1 without the neces- sity of making adjustments in any way.
(2) Pliers shall be provided with a device to stop return of the arms until after the stripped wire is removed. The stripper shall release the wire from the gripping jaws on partial release of compression and simultaneously hold the stripping jaws open to prevent crushing of the wire. Stripping and gripping jaws shall automatically return to the original stripping position as release of the compression is completed. Action shall be such that fine and stranded wires shall not be bent or mushroomed.
(b) Class 2 shall be designed for removal of polytetra- fluoroethylene (Teflon@) insulation, MIL-W-16878 Types E (200″C, 600 V) and EE (200°C; 1,000 V), which requires an unusual amount of precision and rigidity in the strip- ping operation. Pliers shall consist essentially of a body, handles, stripping blades, gripping jaws, an automatic stop return, an optional short latch, and a stripping length stop, and be similar to Fig. 2.
Pliers shall be equipped with blades conforming to one of the sizes specified in Table 2.
(1) Stripping blades shall be in accordance with subparagraph (a)(l) above and have a sufficient number of adequately spaced grooves to accommodate the range of wire sizes specified in Table 2 without the necessity of making adjustments in any way. The blades shall be installed in matched pairs (upper and lower). Support and guidance shall be provided to ensure proper blade alignment when the upper and lower blades are closed on the wire. The stripping blades shall be designed to both cut and accurately position the insulation immedi- ately surrounding the particular place on the wire that is being stripped. The applicable size of blades shown in Table 2 shall also be permanently and legibly marked in a plainly visible place on the blades for each stripper.
(2) The stationary gripping jaw shall lie in a plane approximately parallel to the centers of the stripping holes so that the wire to be stripped wiil be properly aligned with the applicable groove.
(3) The automatic stop return shall be in accordance with subparagraph (a)(2) above.
(4) Strippers may be provided with a short stop latch that shall be easily engaged or disengaged, at the option of the user. When engaged, this short stop latch shall limit the strippers’ length of stroke to approxi- mately 0.25 in., so that the portion of the insulation on a wire usually stripped off may be severed but only partially removed. This separated piece of insulation may be left to temporarily protect the stripped end of the wire from damage, and may be removed by the operator’s fingers when it is no longer needed. This short stop latch shall also incorporate a device that shall function within the limited stroke imposed by the short stop latch and shall be similar to, but independent of, the automatic stop return described in subparagraph (a)(2) above. When the short stop latch is disengaged, it shall in no way interfere with the operation of the wire stripper.
(5) A stripping length stop may be provided so that the ends of the wires may be repeatedly stripped to a predetermined length. This stop shall be adjustable so that any desired stripping length from 0.25 in. through 1.0 in. may be selected and easily set. This stop shall be constructed or designed so that no position in its range will obstruct the operator’s view of the grooves and markings on the stripping blades as they close on the wire.ASME B107.37 pdf download.ASME B107.37-2003 pdf free download
