KNIPEX 87 51 250

KNIPEX 87 51 250 Cobra Water Pump Pliers Instruction Manual

Model: 87 51 250

1. Introducció

This manual provides essential information for the safe and effective use of your KNIPEX 87 51 250 Cobra Water Pump Pliers. Please read these instructions carefully before use and retain them for future reference.

The KNIPEX Cobra Water Pump Pliers are designed for gripping, holding, pressing, and bending various workpieces. Their unique design allows for quick and precise adjustment directly on the workpiece.

KNIPEX 87 51 250 Cobra Water Pump Pliers

Image 1.1: The KNIPEX 87 51 250 Cobra Water Pump Pliers, showcasing their design with red handles and black jaws.

2. Informació de seguretat

Always observe general safety regulations when working with hand tools. Failure to do so may result in injury or damage to the tool or workpiece.

  • Utilitzeu equips de protecció individual adequats, com ara ulleres de seguretat, per protegir-vos de les deixalles que suren volant.
  • Ensure the pliers are clean and free from grease or oil before use to maintain a secure grip.
  • Do not use pliers for purposes other than those for which they are intended.
  • Avoid applying excessive force that could damage the tool or the workpiece.
  • Mantenir fora de l'abast dels nens.

3. Característiques clau

  • Self-locking on pipes and nuts: Provides a firm grip without slipping, reducing the effort required.
  • Ajust fi: Allows for optimal adaptation to different sizes of workpieces and a comfortable handle width.
  • Slim head and joint area: Ensures good access to the workpiece even in confined spaces.
  • Pinch guard: Prevents operators' fingers from being pinched.
  • High-grade Chromium-Vanadium steel: Forged, oil-hardened for durability and strength.
KNIPEX Cobra Pliers Jaw Adjustment

Image 3.1: Close-up of the pliers' jaw mechanism, illustrating the fine adjustment and self-locking feature on a flat object.

4. Configuració

The KNIPEX Cobra Water Pump Pliers are ready for immediate use upon removal from packaging. No assembly is required.

4.1 Inspecció inicial

Before first use, inspect the pliers for any signs of damage or manufacturing defects. Ensure the joint moves smoothly and the gripping jaws are intact.

KNIPEX Cobra Pliers in use on a bolt

Image 4.1: The pliers gripping a bolt, demonstrating their application in a practical scenario.

5. Instruccions de funcionament

5.1 Adjusting the Pliers

  1. Position the pliers' jaws around the workpiece.
  2. Press the "PUSH" button located on the joint.
  3. Slide the upper jaw to adjust the opening width until it firmly grips the workpiece. Release the button to lock the adjustment.
  4. The fine adjustment allows for precise positioning and a comfortable handle width for various hand sizes and workpiece dimensions.
KNIPEX Cobra Pliers adjustment button

Image 5.1: Close-up of the "PUSH" button on the pliers' joint, used for quick and precise jaw adjustment.

5.2 Gripping and Holding

Due to the self-locking effect, the pliers will grip pipes and nuts securely without slipping. This minimizes the need for constant pressure on the handles, reducing user fatigue.

KNIPEX Cobra Pliers gripping a pipe

Image 5.2: The pliers gripping a pipe, demonstrating the self-locking capability.

6. Manteniment

Proper maintenance ensures the longevity and optimal performance of your KNIPEX Cobra Water Pump Pliers.

  • Neteja: After each use, wipe the pliers clean with a dry cloth to remove dirt, grease, or debris.
  • Lubricació: Periodically apply a small amount of light machine oil to the joint to ensure smooth operation.
  • Emmagatzematge: Store the pliers in a dry environment to prevent rust. Keep them away from corrosive materials.
  • Inspecció: Regularly check the gripping teeth for wear and tear. If the teeth are significantly worn, the gripping performance may be reduced.

7. Solució De Problemes

ProblemaCausa possibleSolució
Jaws do not grip securely.Incorrect adjustment; Worn gripping teeth; Oily/greasy workpiece.Re-adjust the jaws to fit the workpiece tightly. Clean the workpiece and pliers. If teeth are severely worn, consider replacing the tool.
Joint is stiff or difficult to adjust.Lack of lubrication; Dirt or debris in the joint.Clean the joint area thoroughly. Apply a small amount of light machine oil to the joint.
Pliers slip on the workpiece.Improper adjustment; Workpiece material is too soft or slippery; Excessive force applied incorrectly.Ensure jaws are adjusted tightly. Clean workpiece. Use appropriate tool for specific material if necessary. Apply steady, controlled pressure.

8. Especificacions

CaracterísticaDetall
Número de model87 51 250
MarcaKNIPEX
MaterialAcer al crom-vanadi
Dimensions del producte9.84" de llargada x 1.69" d'amplada
Pes de l'article284 grams (aproximadament 10 unces)
Material del mànecPlàstic
Tipus de gripErgonòmic
Especificació MetDIN ISO 8976
Amplada de tall (màx.)34 mil·límetres
KNIPEX Cobra Pliers with dimensions

Image 8.1: Diagram showing the approximate length (9.75") and width (1.67") of the KNIPEX Cobra Pliers.

9. Garantia i Suport

For information regarding warranty coverage and customer support, please refer to the official KNIPEX website or contact your authorized dealer. KNIPEX tools are known for their high quality and durability, backed by the manufacturer's commitment to excellence.

Official KNIPEX Weblloc: www.knipex.com

© 2025 KNIPEX. All rights reserved.

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