Need Help Choosing an Electric Torque Screwdriver?

When selecting an Express Assembly electric torque screwdriver, ensuring the tool meets your specific operational requirements is crucial.   We offer three types of traditional electric torque screwdrivers: brushless, brushed, and current control. In the first section, we’ll outline the key factors to consider when selecting the right screwdriver for your needs. The second section will explain the advantages of each type and help you decide which is best suited for your specific applications.

These screwdrivers are designed for various industrial, commercial, and precision assembly tasks, offering a range of options based on torque, power source, and application needs. Here’s a comprehensive guide to help you pick the right tool:

1. Torque Range
   • Determine Your Torque Needs: Express Assembly offers torque ranges from as low as 0.07 in-lbs. to over 442 in-lbs., accommodating delicate electronics or heavy industrial tasks. Always choose a model that fits the torque requirement of your application.
   • Torque Accuracy: For tasks requiring precision, Express Assembly screwdrivers offer high torque accuracy (±3%), ensuring consistency and preventing over-tightening or under-tightening.  For jobs where precision is less critical, we also offer screwdrivers with (±5%) torque accuracy.
2. Speed (RPM)
   • Speed: Express Assembly screwdrivers feature variable speed settings, allowing high-speed efficiency for productivity or slower speeds for delicate operations requiring greater control.
   • Adjustable Speed: Only our brushed screwdriver models offer multiple RPM settings, while our brushless models operate at a single constant speed. If your application requires varying speeds or a slow start for challenging screws, a brushless screwdriver would be the ideal choice.
3. Clutch Type
   • Slip Clutch: A mechanical clutch provides reliable torque control for general-purpose applications, making it suitable for tasks where precision is less critical. These clutches slip until the trigger is released and are available only with a trigger-start mechanism. Slip clutch screwdrivers are typically more economical than shut-off models and have a lower torque accuracy.
   • Shut-Off Clutch: Designed for high-precision work, an automatic shut-off clutch stops the tool once the set torque is reached, preventing over-tightening. These screwdrivers typically offer higher torque accuracy, and the shut-off mechanism provides a more comfortable user experience compared to the previously mentioned slip clutch.
4. Ergonomics
   • Comfort and Handling: Consider the tool’s grip and balance. Express Assembly tools are designed to be ergonomic and lightweight, minimizing user fatigue during prolonged use.
     • For horizontal assembly (such as on a desktop), an inline torque screwdriver is ideal as it keeps the operator’s wrist at a 90-degree angle to the workpiece.
     • For vertical assembly, a pistol grip torque screwdriver is recommended, ensuring the operator’s wrist remains aligned with the workpiece.
     • For tight or low-clearance spaces, an angle torque screwdriver is the best choice.
   • Trigger Type: Choose between push-to-start or trigger options based on what feels more intuitive for your work environment.
5. Build Quality and Durability
   • Industrial Use: Express Assembly screwdrivers are built to withstand heavy use, making them suitable for industrial settings.
   • Motor Type: Brushless motors are more efficient and require less maintenance compared to brushed motors, offering longer tool life.
6. Safety Features
   • Over-Torque Protection: Look for models with over-torque protection, which prevents damage to fasteners or components by cutting off power when torque limits are reached.
   • ESD Safe: If working with sensitive electronics, ESD-safe models help prevent static discharge that could damage components.  Only our brushless and cordless screwdrivers are ESD safe.
7. Cost and Warranty
   • Budget Considerations: Express Assembly offers a range of screwdrivers with various features at different price points. Choose a model that balances necessary features and budget.
   • Warranty and Support: All models come with a 1-year warranty and a 30-day money-back guarantee.
8. ESD-Safe Brushless motors
   • ESD-Safe Models: For electronics or circuit assembly, ensure your chosen model is ESD-safe to protect sensitive parts.

Why Choose a Brushless Electric Torque Screwdriver?

Brushless electric torque screwdrivers are ideal for those requiring durability, precision, and reduced maintenance in industrial environments. Here’s why you might prefer a brushless model:

1. Durability and Low Maintenance
   • Brushless Motors: These motors have no brushes to wear out, leading to longer tool life and less maintenance.
   • Reduced Heat and Friction: Brushless motors produce less heat and friction, making them suitable for high-volume production environments.
2. Energy Efficiency
   • Power Efficiency: Brushless motors use less power for the same torque output, extending battery life for cordless models and reducing electricity use in corded versions.
3. Precision Torque Control
   • High Torque Accuracy: Premium brushless models typically offer ±3% torque accuracy, crucial for industries like electronics or medical devices.
   • Advanced Settings: Some models allow for precise torque adjustments, offering flexibility across various tasks.
4. Longevity and Cost Savings
   • Longer Tool Life: With fewer internal components to wear out, brushless models last longer, reducing long-term costs.
   • Cost-Effectiveness: Though more expensive upfront, brushless screwdrivers save money in the long run due to reduced maintenance and higher efficiency.
5. Quieter Operation
   • Reduced Noise: Brushless motors operate quieter than brushed models, making them suitable for noise-sensitive environments.

When to Choose a Brushed Electric Torque Screwdriver

Brushed electric torque screwdrivers remain a reliable and cost-effective option for many general assembly tasks. Here’s when a brushed model is ideal:

1. Torque Range and Accuracy
   • Brushed models cover a wide range of torque options, typically from 0.5 in-lbs. to 39 in-lbs., making them suitable for general applications.
   • Maintenance: Brushed motors require periodic maintenance due to brush wear, but brushes are usually replaceable, extending the tool’s life.
2. Cost-Effective Option
   • Brushed torque screwdrivers are more affordable upfront than brushless models, making them ideal for lower-volume or less-intensive tasks.

Choosing a Current Control Torque Screwdriver

Express Assembly current control torque screwdrivers use advanced technology to regulate torque precisely. Here’s what to consider:

1. Current Control Technology
   • Precision Control: These screwdrivers stop automatically when the preset torque is reached, ideal for industries needing precise torque application.
   • Rundown Control:  These screwdrivers offer precise control during fastener insertion. For instance, the driver can be programmed to begin at a slow speed, allowing the operator to properly align the screw. It can then increase speed for efficient screw setting, and finally slow down during the last turns to achieve an accurate torque setting.
2. Power and Speed
   • High RPM: Models with higher RPM can improve efficiency on production lines, while lower speeds allow for delicate applications.
3. Ergonomics and Durability
   • Comfort: These tools are designed for ease of use in extended operations, reducing fatigue.
   • Long-Lasting Design: With fewer mechanical components, these screwdrivers are low maintenance, ideal for high-precision, long-term use.

Conclusion

Selecting the right Express Assembly torque screwdriver depends on your application’s torque requirements, power source preference, and industry-specific needs. Whether you opt for a corded, cordless, brushed, or brushless model, understanding these key factors will ensure you pick the best tool for accurate, efficient, and long-lasting performance.  Give us a call and talk directly with one of our experts.

EA-BN Series – Premium DC Brushless Full Shut-Off Clutch Electric Torque Torque Screwdrivers

EA-BN Brushless Screwdriver

• Brushless Motor (results in lower maintenance cost and no carbon fibers entering work environment)
• New Ergonomic design (prevents damage to the fastener that could be caused by the screwdrivers bit.)
• Available in both lever and push-to-start clutches
• Full shut-off clutch turns screwdriver off automatically once the predefined torque setting is reached
• External power supply plugs into either an AC110V or 220V source and converts to a 12 – 40 DCV (depends on screwdriver model)
• Electrostatic Discharge (ESD) protection housing (i.e circuit board assembly)
• Torque accuracy +- 3%
• Torque Range 0.07 – 442 in-lbs.
• Models Inline, Pistol Grip, Angle Grip
• Duel RPM
• Can be ordered with advance power supply that has screw counting and automated assembly line integration

Best for: Applications that require precision repeatable torque, duel RPM or EDS protection, for example machine screw applications, general assembly applications, circuit board assembly applications, assembly line integration, or industrial applications.

Recommended EA-BN Products by Screw Size

ED Series – Direct Plug-In Full Shut-Off Clutch Electric Torque Screwdrivers

ED Push to Start Screwdriver

• Direct plug-in 120V (240V available upon request)
• Lever or Push-to-Start models available
• Clutch turns off automatically once the predefined torque setting is reached.
• Stepless torque adjuster for easy torque changes
• Torque accuracy +- 3%
• Torque Range 1.3 – 40.0 in-lbs.
• Models Inline, Pistol Grip, Angle Grip
• Single speed

Best for: Applications that require precision repeatable torque, for example mechine screw applications, general assembly applications, or industrial application.

Recommended ED Products by Screw Size

ES Series – Direct Plug-In Slip Clutch Electric Torque Screwdrivers

ES Lever Start Screwdriver

• Direct plug-in, lever start – Start the screwdriver by applying slight pressure on the trigger lever
• Slip/cushion clutch – When the torque setting is reached, the clutch slips until the lever is released
• Stepless Torque Adjuster for easy torque changes
• Torque accuracy +- 5%
• Torque Range 0.44– 40.0 in-lbs.
• Models Inline
• Single Speed

Best for: Assembly applications that require less demanding torque accuracy, for example self-tapping screw applications, general assembly applications, or disassembly applications.

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Still not sure of the best screwdriver for your job?  Give us a call at (866)863-2302 and our experts will help you select the perfect tool.