BLG-Series Brushless Electric Screwdrivers

Quick Answer

The BLG-Series is a line of brushless electric clutch screwdrivers designed for precision assembly applications requiring accurate, repeatable torque control. Featuring a high-performance brushless motor, precision automatic shut-off clutch, adjustable torque settings, and optional OPC models, the BLG-Series delivers reliable fastening performance for demanding 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 BLG-Series when:

Precision torque control is required
High-volume production fastening is performed
Long motor life and reduced maintenance are important
Continuous-duty operation is required
Adjustable torque settings are needed
Screw counting or error-proofing is part of the assembly process
A cost-effective brushless electric screwdriver is desired

When Should You NOT Use This?

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

Higher torque above 10 lbf.in is required
Vacuum screw pickup is needed
ESD-safe models are required
Torque and angle traceability are needed
Advanced programmable fastening strategies are required
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 BLG-Series Works

The BLG-Series uses a high-performance brushless motor to drive a precision automatic shut-off clutch.

During operation, the screwdriver:

Delivers repeatable torque output
Automatically shuts off when the preset torque is reached
Allows external torque adjustment
Minimizes heat buildup during continuous operation
Reduces maintenance through brushless motor technology
Supports high-volume production fastening

Result:

Accurate torque control
Improved fastening consistency
Longer motor life
Reduced maintenance
Increased production efficiency

Core Features

High-performance brushless motor
Precision automatic shut-off clutch
External torque adjustment scale
Designed for continuous-duty production
Minimal heat buildup during continuous operation
Lever-start and Two-Way Start configurations
Compact ergonomic housing
OPC models available for screw counting applications
Requires a compatible transformer (power supply)

Configuration Options

Configuration	Best For
Lever Start	Standard production fastening
Two-Way Start (Lever & Push-to-Start)	Flexible production environments
OPC Models	Screw counting and error-proofing applications

Available Models

The BLG-Series includes four brushless electric screwdrivers designed for precision low-torque fastening applications. Models are available in lever-start, Two-Way Start, and OPC configurations with torque capacities ranging from 0.9 to 10 lbf.in (10–120 cN·m).

BLG-Series Model Chart

Model	Item Number	Start Type	Torque Range	RPM (High/Low)	Drive Size	Screw Size
BLG-4000X	144520	Lever Start	0.9–4.8 lbf.in (10–55 cN·m)	1000 / 690	1/4" Female Hex	M1.4–2.6
BLG-4000X-OPC	144522	Lever Start	0.9–4.8 lbf.in (10–55 cN·m)	1000 / 690	1/4" Female Hex	M1.4–2.6
BLG-5000X	144521	Two-Way Start	1.7–10 lbf.in (20–120 cN·m)	1000 / 690	1/4" Female Hex	M2.0–3.0
BLG-5000X-OPC	144523	Two-Way Start	1.7–10 lbf.in (20–120 cN·m)	1000 / 690	1/4" Female Hex	M2.0–3.0

Model Selection Guide

If you need:	Recommended Model
Lowest torque applications	BLG-4000X
Precision electronics assembly	BLG-4000X
General production fastening	BLG-5000X
Two-Way Start operation	BLG-5000X
Screw counting and error-proofing	BLG-4000X-OPC or BLG-5000X-OPC

Compatible Accessories

Accessory	Item Number	Purpose
T-30BL Transformer	144300	Powers BLG-4000X models
T-70BL Transformer	144400	Powers BLG-4000X and BLG-5000X models
BLOP-STC Screw Counter Transformer	144175	Required for OPC models

Transformer

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

T-30BL is compatible with the BLG-4000X.
T-70BL is compatible with both the BLG-4000X and BLG-5000X.
OPC models are designed to operate only with the HIOS BLOP-STC Screw Counter Transformer, providing screw counting and additional error-proofing capabilities.

Setup & Adjustment

Connect the BLG-Series screwdriver to the appropriate transformer.
Install the correct driver bit for the application.
Adjust the external torque setting using the torque adjustment scale.
Verify torque output with a calibrated torque analyzer before production.
If using an OPC model, connect the HIOS BLOP-STC Screw Counter Transformer and verify communication.
Perform sample fastenings and make final torque adjustments before beginning production.
Periodically verify torque output as part of your quality control program.

Common Applications

The BLG-Series is commonly used in:

Electronics assembly
Medical device manufacturing
Consumer electronics manufacturing
Telecommunications equipment assembly
Industrial product assembly
High-volume production environments requiring precision fastening
Applications requiring screw counting and error-proofing

Use Cases (Real-World Examples)

Electronics Assembly

Problem: Precision electronic assemblies require accurate, repeatable torque to protect sensitive components and ensure product quality.

Solution: The BLG-Series provides consistent torque control with a precision automatic shut-off clutch, helping improve fastening accuracy and assembly consistency.

High-Volume Production

Problem: Continuous production environments require reliable fastening tools that operate for long periods with minimal maintenance.

Solution: The BLG-Series combines a high-performance brushless motor with an automatic shut-off clutch to deliver repeatable torque while reducing maintenance associated with brushed motors.

Screw Counting Applications

Problem: Manufacturers need to verify that every required fastener has been installed before completing an assembly.

Solution: BLG-Series OPC models operate with the HIOS BLOP-STC Screw Counter Transformer to support screw counting and help reduce assembly errors.

General Industrial Assembly

Problem: Production lines require a durable electric screwdriver capable of maintaining fastening consistency throughout repetitive assembly operations.

Solution: The BLG-Series provides dependable brushless motor performance with adjustable torque settings for reliable production fastening.

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.