Quick Answer
FGA Adjustable Torque Screwdrivers provide repeatable torque control for precision fastening applications while helping reduce assembly errors, over-tightening, and fastener damage.
Who This Is For
- Manufacturing & process engineers
- Assembly operators
- Quality engineers
- Electronics manufacturers
- Medical device manufacturers
- Aerospace assembly teams
- Telecommunications equipment manufacturers
- General industrial assembly environments
When Should You Use This?
Use FGA Adjustable Screwdrivers when:
- Precise torque control is required
- Fastening consistency is important
- Components are sensitive to over-tightening
- Multiple torque settings are needed
- Product quality and repeatability are priorities
- Standardized assembly processes are required
When Should You NOT Use This?
Do not use FGA Adjustable Screwdrivers if:
- High-torque fastening applications exceed the tool range
- Impact fastening is required
- A general-purpose hand tool is needed
- The application does not require controlled torque fastening
How FGA Adjustable Screwdrivers Work
The FGA screwdriver uses a precision cam-over clutch mechanism:
- Operator applies force to the fastener
- Tool reaches the preset torque value
- Clutch automatically cam-overs and disengages
- Operator stops applying force immediately after release
Result:
Improved fastening consistency, reduced fastener damage, and more reliable assembly quality.
Core Features
- Adjustable torque settings
- Cam-over clutch mechanism
- Repeatable torque performance
- Helps reduce over-tightening
- Supports precision fastening applications
- Compatible with interchangeable bits
- Designed for clean manufacturing environments
FGA Models
The FGA Series includes adjustable cam-over torque screwdrivers designed for applications requiring repeatable torque performance and the flexibility to adjust torque settings for different fastening requirements.
Each model can be adjusted throughout its specified torque range using the built-in digital torque scale and locking mechanism.
How FGA Models Are Specified
Each FGA model represents a screwdriver family with an adjustable torque range.
Unlike preset screwdrivers, FGA tools allow the user to adjust and verify torque settings as production requirements change.
Example
The FGA-40 has an adjustable torque range of 4–40 lbf.in (0.4–4.5 N·m).
If your application requires 25 lbf.in, the tool can be adjusted to that setting and verified using a torque analyzer.
FGA Torque Range Lineup
0.18 N·m → 9 N·m
FGA-8
0.18 N·m ───────── 0.9 N·m
FGA-20
0.22 N·m ─────────────────── 2.3 N·m
FGA-40
0.4 N·m ─────────────────────────────── 4.5 N·m
FGA-80
0.9 N·m ───────────────────────────────────────────── 9 N·m
Model Selection Guide
Need a screwdriver for low-torque fastening applications?
Choose:
- FGA-8
The FGA-8 provides a torque range of 1.6–8 lbf.in (18–90 cN·m) and is suited for precision assembly and delicate fastening applications.
Need a versatile screwdriver for light assembly applications?
Choose:
- FGA-20
The FGA-20 provides a torque range of 2–20 lbf.in (0.22–2.3 N·m) and is commonly used where multiple low torque settings are required.
Need a broader torque range for production assembly?
Choose:
- FGA-40
The FGA-40 provides a torque range of 4–40 lbf.in (0.4–4.5 N·m) and includes a removable sliding T-bar for easier torque adjustment.
Need the highest torque capacity in the FGA lineup?
Choose:
- FGA-80
The FGA-80 provides a torque range of 8–80 lbf.in (0.9–9 N·m) and includes a removable sliding T-bar for torque adjustment.
Need multiple torque unit options?
Choose:
- FGA-8
- FGA-20
- FGA-40
These models allow selection of:
- ozf.in
- lbf.in
- cN·m
- N·m
- kgf·cm
Need higher torque settings?
Choose:
- FGA-80
The FGA-80 supports:
- lbf.in
- N·m
- kgf·cm
FGA Models
| Model | Item Number | Torque Range (lbf.in) | Torque Range (N·m) | Torque Range (cN·m) | Drive Size | Length | Weight |
|---|---|---|---|---|---|---|---|
| FGA-8 | 076720 | 1.6–8 | 0.18–0.9 | 18–90 | 1/4" Female Hex | 7" | 13 oz |
| FGA-20 | 076721 | 2–20 | 0.22–2.3 | 22–226 | 1/4" Female Hex | 7" | 13.1 oz |
| FGA-40 | 076722 | 4–40 | 0.4–4.5 | 45.2–452 | 1/4" Female Hex | 7" | 13.3 oz |
| FGA-80 | 076723 | 8–80 | 0.9–9 | — | 1/4" Female Hex | 7" | 13.3 oz |
Which FGA Model Should I Select?
Start with these questions:
- What torque value is required?
- Will torque settings need to change between applications?
- Is a wider torque adjustment range beneficial?
- Is the application focused on precision assembly or general production fastening?
- Are multiple torque units required?
- Is preventing over-torque critical?
- Will multiple operators use the tool?
- Is one adjustable tool preferred over maintaining multiple preset tools?
The answers to these questions will help determine the appropriate FGA model for the application.
Setup & Adjustment
Adjustable Torque Setting
FGA tools utilize an externally adjustable torque mechanism with a digital torque scale.
To adjust torque:
- Unlock the adjustment mechanism.
- Adjust the torque setting using the digital scale.
- Lock the setting in place.
- Verify the torque value using a torque analyzer before production use.
Important Adjustment Notes
- The digital torque scale allows quick torque setting changes.
- The locking mechanism helps prevent incidental torque adjustments.
- Torque settings should always be verified using calibrated torque testing equipment.
- Operate the tool only within its specified torque range.
Removable Sliding T-Bar
The FGA-40 and FGA-80 models include a removable sliding T-bar to assist with torque adjustment.
Can Torque Be Changed Later?
Yes.
FGA tools are designed for adjustable torque applications and can be reconfigured as production requirements change. Torque settings should be verified after adjustment before returning the tool to service.
Common Applications
The FGA series is commonly used in:
- Electronics assembly
- Medical device manufacturing
- Aerospace assembly
- Telecommunications equipment production
- Appliance manufacturing
- Precision mechanical fastening applications
- General industrial assembly
Configuration Options
- Adjustable torque settings
- Interchangeable bit compatibility
- Cleanroom-compatible configurations
- ESD-safe model availability
Use Cases (Real-World Examples)
Electronics Assembly
Problem: Sensitive components damaged from over-tightening
Solution: Cam-over clutch helps control torque application
Medical Device Manufacturing
Problem: Inconsistent fastening quality
Solution: Adjustable torque settings improve process consistency
Aerospace Assembly
Problem: Precision fastening requirements vary between applications
Solution: Adjustable screwdriver allows torque changes for multiple fastener specifications
Clean Manufacturing Environments
Problem: Standard tools may not be suitable for controlled assembly areas
Solution: Cleanroom-compatible screwdriver supports controlled production processes
Troubleshooting
Issue 1: Inconsistent torque output
- Cause: Tool wear or improper adjustment
- Solution: Verify torque setting and recalibrate if necessary
Issue 2: Excessive cam-over behavior
- Cause: Incorrect torque setting or worn components
- Solution: Inspect tool and confirm proper adjustment
Issue 3: Fastener damage
- Cause: Incorrect bit selection or excessive force after release
- Solution: Replace worn bits and stop force immediately after cam-over
Calibration & Standards
Why Torque Accuracy Matters
Incorrect torque can lead to:
- Loose fasteners
- Product failures
- Damaged threads
- Cracked components
- Reduced product lifespan
- Increased warranty claims
Calibration Recommendations
Many manufacturers recommend calibration:
- Every 5,000 cycles
- Every 12 months
- After the tool is dropped or damaged
Importance of Torque Verification
Torque verification helps ensure:
- Process consistency
- Product quality
- Compliance with quality standards
- Reliable fastening performance
Bit Compatibility & Fastening Best Practices
Compatible Bit Types
- Phillips
- Slotted
- Torx
- Hex
- Specialty fastening profiles
Best Practices
- Keep tool aligned with the fastener
- Replace worn bits regularly
- Operate within the recommended torque range
- Use proper fastening technique
Maintenance & Storage Guidelines
Recommended Maintenance
- Inspect tool regularly
- Keep tool clean
- Monitor clutch performance
- Verify torque accuracy periodically
Proper Storage
- Store in a clean, dry environment
- Avoid excessive humidity
- Set tool to minimum torque during long-term storage
- Protect tool from impacts and contamination
Frequently Asked Questions
Are ESD-safe models available?
Yes. Select FGA models are available in ESD-safe configurations for electronics manufacturing environments.
Are Cleanroom Models Available?
Yes. Select FGA models are available in cleanroom configurations designed for controlled manufacturing environments and sensitive assembly applications.
Are replacement parts available?
Replacement parts and accessories are available for many FGA screwdriver models.
Can calibration services be provided?
Yes. Professional torque calibration and testing services are available.
Media & Supporting Content
Related Content / Articles
- Guide: Choosing Between Preset and Adjustable Torque Screwdrivers
- Mountz Torque Hand Tools Bang Sheet
- Mountz Hand Tools Service Card
Need Help?
- Contact Applications Engineering for setup guidance
- Speak with Sales for product selection
- Call us:
- North America:(408) 850-9978
- International: +44 1428 741756
M-F 6am - 5pm PST
