1. Introduction
This manual provides essential information for the safe and effective operation, maintenance, and care of your CRAFTSMAN CMMT99436 1/2-Inch Digital Torque Wrench. Please read this manual thoroughly before using the tool and retain it for future reference.
The CRAFTSMAN 1/2-Inch Digital Torque Wrench is designed for precision torque applications, offering convenience by converting torque measurements between foot-pounds (ft./lb.), inch-pounds (in./lb.), and Newton-meters (Nm) with ease. Its LED backlit screen ensures clear readability of every readout, even in dimly lit environments.
2. Consignes de sécurité
- Always wear appropriate personal protective equipment (PPE), including safety glasses, when operating this tool.
- Assurez-vous que la pièce à usiner est stable et bien fixée avant d'appliquer le couple.
- Do not exceed the maximum torque capacity of 250 ft./lb.
- Avoid using the torque wrench as a breaker bar or for loosening fasteners.
- Gardez l'outil propre et sec. Ne l'exposez pas à une humidité excessive ni à des températures extrêmes.
- Rangez l'outil dans son étui de protection lorsqu'il n'est pas utilisé.
3. Composants terminésview
The CRAFTSMAN CMMT99436 Digital Torque Wrench consists of the following main components:
- Tête d'entraînement : 1/2-inch square drive for sockets.
- Arbre: Construction métallique durable.
- Affichage numérique: LED backlit screen for torque readings.
- Panneau de contrôle: Buttons for power, unit selection, and setting adjustments.
- Poignée ergonomique : Offre une prise en main confortable et sûre.
- Compartiment à piles : Located at the end of the handle.
Figure 1 : Plein view of the CRAFTSMAN CMMT99436 Digital Torque Wrench.
4. Installation
4.1 Installation de la batterie
- Locate the battery compartment cap at the end of the handle.
- Unscrew or unclip the cap to open the compartment.
- Insert the required batteries (typically AA, refer to packaging for exact type) ensuring correct polarity (+/-).
- Replace the compartment cap and secure it.
4.2 Étalonnage initial
For optimal accuracy, ensure the wrench is calibrated before first use and periodically thereafter. Place the wrench on a flat, level surface. Press and hold the 'C' (Calibration) button until the display shows '0000' or a similar calibration indicator. This process zeros the sensor, preparing it for accurate measurements.
5. Mode d'emploi
5.1 Mise sous/hors tension
- To power on, press the power button (usually marked with a power symbol or 'C'). The display will light up.
- To power off, press and hold the power button until the display turns off. The wrench may also have an auto-shutoff feature after a period of inactivity.
5.2 Sélection d'unité
Press the 'U/S' (Unit/Setting) button to cycle through available measurement units: ft./lb., in./lb., Nm, and degrees (for angle measurement). Select the desired unit for your application.
Figure 2: Digital display and control panel for unit selection.
5.3 Setting Target Torque/Angle
- Use the arrow buttons (up/down) on the control panel to adjust the target torque value or angle.
- The display will show the set value.
5.4 Application du couple
- Attach the appropriate socket to the 1/2-inch drive head.
- Placez la douille sur la fixation.
- Apply steady, smooth force to the handle. The digital display will show the real-time torque being applied.
- As you approach the target torque, the wrench will provide audible beeps and visual indicators (e.g., green LED) to alert you.
- Once the target torque is reached, the wrench will emit a continuous tone and/or a red LED will illuminate, indicating that you should stop applying force. This 'click style' feedback helps prevent over-tightening.
Figure 3: The drive head and 'click style' mechanism for precise torque application.
5.5 Clockwise/Counter-clockwise Usage
The wrench is designed to measure torque in both clockwise and counter-clockwise directions. Ensure the ratchet direction switch on the drive head is set correctly for your application.
6. Entretien
- Nettoyage: Wipe the wrench with a clean, dry cloth after each use. Do not use harsh chemicals or abrasive cleaners.
- Stockage: Store the torque wrench in its original durable clear case in a dry, temperature-controlled environment. Remove batteries if storing for extended periods to prevent leakage.
- Étalonnage: Digital torque wrenches should be recalibrated periodically by a qualified service center to maintain accuracy. Refer to the manufacturer's recommendations for calibration intervals.
Figure 4: The CRAFTSMAN Digital Torque Wrench stored in its durable clear case for quick identification and protection.
7. Dépannage
| Problème | Cause possible | Solution |
|---|---|---|
| L'affichage ne fonctionne pas | Piles mortes ou mal installées | Remplacez les piles en veillant à respecter la polarité. |
| Lectures inexactes | Needs calibration; improper technique | Perform initial calibration (Section 4.2). Ensure smooth, steady force application. |
| No audible/visual alert | Settings adjusted; low battery | Check settings for alert activation. Replace batteries. |
8. Spécifications
- Numéro de modèle : CMMT99436
- Marque: ARTISAN
- Taille du lecteur : 1/2 pouce
- Plage de couple: 50-250 ft./lb.
- Normes de mesure : SAE (ft./lb., in./lb.), Metric (Nm)
- Style de tête : Carré fixe
- Mode de fonctionnement : Electric (Digital)
- Cliquet : Oui
- Matériel: Métal
- Finition: Revêtement en poudre
- Longueur de l'article : 29.64 pouces
- Poids de l'article : 5 livres
- Composants inclus : (1) Clé dynamométrique
- Conformité: Meets or Exceeds ASME Specifications
9. Garantie et assistance
For warranty information, technical support, or service inquiries, please refer to the official CRAFTSMAN webConsultez leur site web ou contactez leur service client. Conservez votre reçu d'achat comme preuve d'achat.
