408-6877 Datasheet, PDF (4/5 Pages) TE Connectivity Ltd – Crimping Die Assemblies

408-6877
6. MAINTENANCE AND INSPECTION
6.1. Daily Maintenance
1. Remove dust, moisture, and other contaminants with a clean brush or a soft, lint-free cloth. Do NOT
use objects that could damage the dies.
2. Make sure the proper die retaining screws are in place and secured.
3. When the dies are not in use, mate and store them in a clean, dry area.
4. Store the tool with the tool handles closed to prevent objects from becoming lodged within the jaws.
6.2. Periodic Inspection
Regular inspections should be performed by quality control personnel. A record of scheduled inspections
should remain with the dies and/or be supplied to supervisory personnel responsible for the dies. The
inspection frequency should be based on the amount of use, working conditions, operator training and skill, and
established company standards. These inspections should be performed in the following sequence:
Visual Inspection
1. Remove all lubrication and accumulated film by immersing the dies in a suitable commercial
degreaser that will not affect paint or plastic material.
2. Make certain all die retaining screws, retaining rings, and die components are in place. If
replacements are necessary, refer to Section 7, REPLACEMENT.
3. Check all bearing surfaces for wear. Remove and replace worn components.
Center Contact Crimp Height Inspection
Crimp height inspection is performed through the use of a micrometer with a modified anvil, commonly
referred to as a crimp height comparator. TE does not market crimp height comparators. Refer to
Instruction Sheet 408-7424 for detailed information on obtaining and using a crimp height comparator.
Proceed as follows to check the crimp height of the center contact:
1. Select a center contact for the connector being used.
2. Refer to Section 4, CRIMPING PROCEDURE, and crimp the center contact accordingly.
3. Using a crimp height comparator, measure the crimp height as shown in Figure 5. If the crimp height
conforms to that shown, the die assembly is considered dimensionally correct. If not, the dies must be
replaced before returning them to service (refer to Section 7, REPLACEMENT).
Gaging the Ferrule Crimping Chamber
This inspection requires the use of a plug gage conforming to the diameters in Figure 5. TE does not
manufacture or market these gages.
To gage the ferrule crimping chamber, proceed as follows:
1. Close the jaws until the dies have bottomed, then HOLD the tool handles in this position. Do NOT
force the dies beyond initial contact.
2. Align the GO element with the proper crimping chamber. Push the element straight into the crimping
chamber without using force. The GO element must pass completely through the crimping chamber.
3. Align the NO-GO element and try to insert it straight into the same crimping chamber. The NO-GO
element may start entry, but must not pass completely through.
If the crimping chamber conforms to the gage inspection, the dies are considered dimensionally correct,
and should be lubricated with a THIN coat of any good SAE 20 motor oil. If not, the dies must be replaced
(refer to Section 7, REPLACEMENT).
For additional information regarding the use of a plug gage, refer to Instruction Sheet 408-7424.
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