Stäubli MA420 CT-CP Crimping Pliers
These operating instructions provide detailed guidance for the Stäubli MA420 crimping pliers, model CT-CP.
Safety Instructions
Always use components and tools specified by Stäubli. Adhere strictly to the preparation and assembly instructions provided. Failure to do so may compromise safety and conformity with technical data. Do not modify the product in any way. Connectors not originally manufactured by Stäubli, even if described as "Stäubli-compatible" by other manufacturers, may not meet the requirements for safe and stable electrical connections and must not be used with Stäubli elements. Stäubli accepts no liability for damages resulting from the use of unauthorized connectors with Stäubli elements. Stäubli Electrical Connectors (Stäubli) disclaims all liability for non-compliance with these warnings.
Installation, Electrotechnical Expertise: Products must be assembled and installed by qualified and instructed personnel, observing all applicable safety regulations.
Caution, Risk of Electric Shock: Always work in a de-energized state. Follow the five safety rules for electrical installations: 1. Disconnect completely. 2. Secure against re-connection. 3. Verify absence of operating voltage. 4. Carry out grounding and short-circuiting. 5. Provide protection against adjacent live parts. All personnel involved must be electrically skilled, instructed, or supervised by such a person. Protection against electric shock must also be checked in the end-use applications.
Caution: Before each use, inspect the connector for external defects, especially the insulation. If there are any safety concerns, consult an electrically skilled person or replace the connector.
Useful hint or tip: For further technical data, please refer to the product catalog at www.staubli.com/electrical.
Features Overview
The hand tool primarily consists of the crimp head with a crimp die, two locking bolts for the crimp head, a movable handle, and a locking mechanism.
Figure 1: Overview of the Crimping Pliers
The crimping pliers (CT-CP) feature a crimp head, handles, a fast feed lever, pins, a release lever, and upper and lower crimping dies. The crimping die set (8) is also shown.
Key Components:
- 1. Handle
- 2. Adapter
- 3. Fast feed lever
- 4. Pins
- 5. Release lever
- 6. Upper crimping die
- 7. Lower crimping die
- 8. Crimping die set
Crimping Die Sets:
| Type | Order No. | Conductor Cross Section (mm²) | AWG | Description |
|---|---|---|---|---|
| CT-CP | 33.3930 | - | - | Crimping pliers |
| CT-I-CP-4 | 33.3931 | 2.5 - 4 | 14 - 12 | Crimping die |
| CT-I-CP-6 | 33.3932 | 6 | 10 | Crimping die |
| CT-I-CP-10 | 33.3933 | 10 | 8 | Crimping die |
Change of Crimping Die Set
Follow these steps to change the crimping die set:
- Open the tool.
- Loosen the pins of the basic tool and extract them until they stop.
- Remove the adapter.
- Insert the lower crimping die until it is locked.
- Insert the upper crimping die until it is locked.
- Place the adapter onto the basic tool and lock the pins.
- Ensure the crimping die set is correctly mounted.
Figures 2-7: Die Set Replacement Procedure
Illustrations showing the process of opening the tool, loosening pins, removing the adapter, inserting the lower and upper dies, and securing the adapter with pins.
Crimping Procedure
- Open the tool.
- Insert the contact into the center of the respective crimping zone.
- Operate the fast feed lever anticlockwise until the contact is held. Alternatively, press the handles to secure the contact.
- Insert the cable into the die.
- Open and close the tool completely until the lower crimping die is in the basic position.
Figures 8-12: Crimping Process
Visuals demonstrating opening the tool, inserting the contact and cable, operating the fast feed lever, and completing the crimp cycle.
Note: Ensure the tool is operated correctly to achieve a proper crimp.
Premature Release
There are two versions for premature release:
Version 1: Manual Release with Fast Feed Lever
- Press and hold the release lever down.
- Operate the fast feed lever clockwise until the lower crimping die is in the basic position.
Figures 14-15: Manual Release
Illustrations showing how to press the release lever and operate the fast feed lever for manual release.
Version 2: Release with a Wrench
Use a wrench if manual release is not possible.
- Close the handles slightly until the release lever can be pressed down out of the teeth structure.
- Keep the release lever pressed, apply the wrench, and move the nut anticlockwise until the lower crimping die is in the basic position.
Figures 16-17: Wrench Release
Visuals demonstrating the procedure for releasing the tool using a wrench when manual release is difficult.
Attention: Do not use a crimped wire if a premature release occurred. Incorrectly crimped wires must be discarded and not used.
Manufacturer Information
Manufacturer/Producer: Stäubli Electrical Connectors AG
Stockbrunnenrain 8
4123 Allschwil/Switzerland
Tel: +41 61 306 55 55
Fax: +41 61 306 55 56
Email: ec.ch@staubli.com
Website: www.staubli.com/electrical
