CRAFTSMAN Digital Torque Wrench CMMT99435 User Manual

1. Introduction

This manual provides detailed instructions for the safe and effective operation, maintenance, and troubleshooting of your CRAFTSMAN Digital Torque Wrench, Model CMMT99435. Please read this manual thoroughly before using the tool to ensure proper function and to prevent injury or damage.

The CRAFTSMAN 3/8-inch Digital Torque Wrench is designed for precise torque applications, converting measurements between ft./lbs., in./lbs., and Nm. It features an LED backlit screen for clear readout visibility and an ergonomic handle for comfortable use.

2. Safety Information

Always observe basic safety precautions when using this tool to reduce the risk of personal injury and damage to the tool or workpiece.

• Read All Instructions: Familiarize yourself with the tool's functions and operating procedures.
• Wear Eye Protection: Always wear ANSI-approved safety goggles.
• Keep Work Area Clean: Cluttered areas invite accidents.
• Do Not Over-Torque: Exceeding the wrench's maximum torque capacity can damage the tool and fastener.
• Proper Storage: Store the wrench in a clean, dry place, away from extreme temperatures and humidity.
• Battery Safety: Ensure correct battery polarity and remove batteries during prolonged storage to prevent leakage.

3. Product Components

The CRAFTSMAN Digital Torque Wrench consists of the following main components:

• Drive Head: 3/8-inch square drive for sockets.
• Digital Display: LED backlit screen for torque readings.
• Control Buttons: For power, unit selection, and setting torque values.
• Handle: Ergonomically designed for comfortable grip.
• Battery Compartment: Located at the base of the handle.

Figure 1: Side view of the CRAFTSMAN Digital Torque Wrench, showing the digital display and control buttons.

Figure 2: Front view of the CRAFTSMAN Digital Torque Wrench, highlighting the drive head and ergonomic handle.

4. Setup and Initial Operation

4.1. Battery Installation

1. Locate the battery compartment cap at the bottom of the wrench handle.
2. Carefully unscrew or unlatch the cap.
3. Insert the required batteries (Alkaline, typically AAA or AA, refer to specifications) ensuring correct polarity (+/-).
4. Replace the battery compartment cap securely.

Figure 3: CRAFTSMAN Digital Torque Wrench shown with two AAA batteries, indicating the battery type for installation.

4.2. Power On/Off

• To power on, press the Power button. The display will illuminate.
• To power off, press and hold the Power button until the display turns off, or the wrench will automatically shut off after a period of inactivity to conserve battery life.

4.3. Unit Selection

Press the Unit button to cycle through available torque units: ft./lbs., in./lbs., and Nm.

5. Operating Instructions

5.1. Setting Target Torque

1. Power on the wrench and select the desired unit (ft./lbs., in./lbs., or Nm).
2. Press the Set button to enter torque setting mode.
3. Use the Up and Down arrow buttons to adjust the target torque value.
4. Press the Set button again to confirm the target torque and exit setting mode.

5.2. Applying Torque

1. Attach the appropriate socket to the 3/8-inch drive head.
2. Place the socket onto the fastener.
3. Apply steady, smooth force to the wrench handle. The digital display will show the real-time torque being applied.
4. As you approach the target torque, the wrench may provide an audible or visual alert (e.g., LED indicator, beeping) to indicate proximity to the set value.
5. Stop applying force immediately once the target torque is reached and confirmed by the wrench's indicator.

5.3. Peak Hold Mode (if applicable)

Some digital torque wrenches feature a peak hold mode, which displays the maximum torque applied during an operation. Consult the specific model's interface for activation and usage if this feature is present.

6. Maintenance

• Cleaning: Wipe the wrench clean with a soft, dry cloth after each use. Do not use harsh chemicals or solvents.
• Storage: Store the wrench in its protective case (if provided) in a dry, temperature-controlled environment. Remove batteries if storing for extended periods (over 30 days).
• Calibration: Digital torque wrenches require periodic calibration to maintain accuracy. Refer to CRAFTSMAN's official service guidelines for recommended calibration intervals and procedures.
• Inspection: Regularly inspect the drive head and handle for any signs of wear or damage. Do not use a damaged wrench.

7. Troubleshooting

8. Specifications

• Model: CMMT99435
• Drive Size: 3/8-inch
• Torque Range: 20-100 ft./lbs. (approx. 27.1-135.6 Nm, 240-1200 in./lbs.)
• Measurement Units: ft./lbs., in./lbs., Nm
• Display: LED Backlit Digital
• Power Source: Batteries (Alkaline, type specified in battery compartment)
• Material: Metal
• Item Length: 19.01 Inches
• Item Weight: 0.01 Ounces (Note: This weight appears to be a data entry error. Refer to product packaging for accurate weight.)
• Head Style: Fixed Square
• UPC: 885911610292

9. Warranty and Support

For warranty information, service, or technical support, please refer to the official CRAFTSMAN website or contact CRAFTSMAN customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.

CRAFTSMAN Official Website: www.craftsman.com