Because of the variety of insulation types and thickness, connector manufacturers generally do not provide insulating layer of the crimping height. The insulation crimping provides stress relief to the conductor's compression zone, so that the wire core is not broken when the cable is bent.
The too small insulation pressure zone will cause the metal stress in the insulation crimping area to be too large and weaken the stress releasing function. Most types of crimping tools can be independent of the conductor's crimping height and adjust the insulation crimping height. The correct adjustment allows the terminal to clamp the insulating layer at least 180 degrees and will not pierce the insulating layer. The outer diameter of the insulating crimping parts of the terminals is close to the outer diameter of the cable insulating layer.