EF-Series Electric Torque Screwdrivers

Quick Answer

The EF-Series is a line of electric clutch screwdrivers designed for precision assembly applications requiring accurate, repeatable torque control. Featuring a precision automatic shut-off clutch, adjustable torque settings, and lever-start or push-to-start configurations, the EF-Series helps improve fastening consistency while supporting continuous production environments.

Who This Is For

Manufacturing engineers
Process engineers
Quality engineers
Assembly operators
Electronics manufacturers
Medical device manufacturers
Aerospace manufacturers
Industrial assembly facilities

When Should You Use This?

Use the EF-Series when:

Low- to medium-torque fastening is required
Repeatable torque control is critical
Electronics or precision assemblies are being produced
Continuous production fastening is performed
ESD-safe tools are required
Operator comfort is important
Adjustable torque settings are needed

When Should You NOT Use This?

The EF-Series may not be the best choice when:

High-torque fastening is required
Torque and angle traceability are needed
Fastening data collection is required
Advanced process control or error-proofing is necessary
A cordless screwdriver is preferred

For applications requiring programmable fastening strategies or torque and angle monitoring, consider the Mountz ECT-Series or EPT-Series.

How the EF-Series Works

The EF-Series uses an electric motor to drive a precision automatic shut-off clutch.

During operation, the screwdriver:

Delivers repeatable torque output
Automatically disengages when the preset torque is reached
Allows external torque adjustment
Supports continuous production fastening
Helps improve fastening consistency

Result:

Accurate torque control
Improved product quality
Reduced fastening variation
Increased production efficiency
Better assembly consistency

Core Features

Precision automatic shut-off clutch
External torque adjustment
Lever-start and push-to-start models
ESD-safe models available
Ergonomic lightweight design
Adjustable speed by model
Continuous-duty operation
Compatible with optional Torque Cover
Requires transformer for operation

Configuration Options

Lever-start models
Push-to-start models
ESD-safe models
External torque adjustment
Optional Torque Cover
Transformer powered

Available Models

The EF-Series includes multiple electric torque screwdrivers designed for precision low- and medium-torque fastening applications. Models are available in lever-start and push-to-start configurations with torque capacities ranging from 0.3 to 15.6 lbf.in.

EF-Series Model Chart

Model	Item Number	Start Type	Torque Range	RPM (High/Low)	Drive Size
EF030-E ESD	145781	Lever Start	0.3–2.6 lbf.in	1000 / 700	4 mm HIOS
EF040-E ESD	145782	Lever Start	0.35–3.5 lbf.in	1000 / 700	4 mm HIOS
EF055-E ESD	145783	Lever Start	0.4–4.8 lbf.in	1000 / 500	4 mm HIOS
EF080-A ESD	145704	Lever Start	0.8–6.9 lbf.in	1000 / 670	1/4" Female Hex
EF080PA ESD	145705	Push-to-Start	0.8–6.9 lbf.in	1000 / 670	1/4" Female Hex
EF120-A ESD	145708	Lever Start	1.7–10.4 lbf.in	1000 / 670	1/4" Female Hex
EF120PA ESD	145709	Push-to-Start	1.7–10.4 lbf.in	1000 / 670	1/4" Female Hex
EF180-A ESD	145880	Lever Start	1.7–15.6 lbf.in	630 / 440	1/4" Female Hex
EF180PA ESD	145881	Push-to-Start	1.7–15.6 lbf.in	630 / 440	1/4" Female Hex

Model Selection Guide

If you need:	Recommended Model
Lowest torque applications	EF030-E
Precision electronics assembly	EF040-E or EF055-E
General production assembly	EF080 Series
Medium-torque assembly	EF120 Series
Highest torque capacity	EF180 Series
Lever-start operation	EF030-E, EF040-E, EF055-E, EF080-A, EF120-A, EF180-A
Push-to-start operation	EF080PA, EF120PA, EF180PA

Compatible Accessories

Accessory	Item Number	Purpose
Torque Cover (EF080/EF120/EF180)	145700	Prevents accidental torque adjustment
Torque Cover (EF030/EF040/EF055)	145773	Prevents accidental torque adjustment
Transformer	Required	Powers the screwdriver

Transformer

The EF-Series requires a compatible transformer (power supply) for operation.

Refer to the product documentation to select the appropriate transformer for your screwdriver model.

Setup & Adjustment

Connect the EF-Series screwdriver to a compatible transformer.
Install the appropriate driver bit.
Adjust the external torque setting for the fastening application.
Verify the torque setting using a calibrated torque analyzer before production.
Install the optional Torque Cover if protection against accidental torque adjustment is required.
Perform sample fastenings and make final adjustments before beginning production.
Periodically verify torque output as part of your quality control program.

Common Applications

The EF-Series is commonly used in:

Electronics assembly
Medical device manufacturing
Aerospace assembly
Telecommunications equipment assembly
Consumer electronics manufacturing
Industrial product assembly
General production environments requiring low- to medium-torque fastening

Use Cases (Real-World Examples)

Electronics Assembly

Problem: Sensitive electronic assemblies require precise, repeatable torque to prevent fastener or component damage.

Solution: The EF-Series delivers accurate torque control with a precision automatic shut-off clutch for consistent fastening results.

Medical Device Manufacturing

Problem: Small fasteners must be installed consistently to maintain product quality and compliance.

Solution: The EF-Series provides repeatable torque output and ergonomic operation for precision assembly applications.

High-Volume Production

Problem: Production environments require reliable fastening performance throughout long operating shifts.

Solution: The EF-Series is designed as a rugged production tool that delivers consistent fastening performance in repetitive assembly applications.

ESD-Sensitive Manufacturing

Problem: Electrostatic discharge can damage sensitive electronic components during assembly.

Solution: ESD models help protect sensitive products from electrostatic discharge while maintaining fastening accuracy.

Maintenance

Verify torque output regularly using a calibrated torque analyzer.
Inspect the bit holder and drive components for wear or damage.
Keep the screwdriver clean and free of dust and debris.
Inspect the power cable and transformer before operation.
Replace worn screwdriver bits as needed to maintain fastening accuracy.
Periodically verify torque settings as part of your preventive maintenance program.