Quick Answer
FG Cleanroom preset screwdrivers deliver fixed, repeatable torque using a cam-over clutch while utilizing low-outgassing materials and specialized seals designed to help minimize contamination in cleanroom manufacturing environments.
Who This Is For
- Manufacturing & process engineers
- Cleanroom assembly operators
- Quality & calibration teams
- Semiconductor manufacturers
- Medical device manufacturers
- Aerospace assembly teams
- Optics and laboratory production environments
- CX and Sales teams supporting torque tools
When Should You Use This?
Use FG Cleanroom preset screwdrivers when:
- Cleanroom compatibility is required
- Torque must remain fixed and controlled
- Sensitive assemblies require contamination reduction
- Multiple operators need consistent fastening results
- Over-tightening could damage components
- Production quality and process control are critical
When Should You NOT Use This?
Do not use FG Cleanroom preset screwdrivers if:
- Torque values need to change frequently → use an adjustable tool
- Higher torque ranges are required → use larger torque screwdriver models
- Torque data capture or traceability is required → use a transducerized system
- Cleanroom compatibility is not required for the application
How FG Cleanroom Preset Screwdrivers Work
FG Cleanroom tools use a cam-over clutch mechanism with internal torque adjustment:
- Torque builds during fastening
- Once the preset torque is reached, the tool cam-overs or slips
- Additional torque is prevented from being applied
- Wear-resistant seals and cleanroom materials help minimize airborne contamination and grease leakage
Result:
Consistent torque, reduced fastener damage, improved quality control, and cleaner assembly processes.
Core Features
- High-grade, low-outgassing powder coat
- Dynamic wear-resistant internal seals
- Cam-over clutch for torque limiting
- Internal tamper-resistant torque adjustment
- Preset torque operation
- Designed for cleanroom environments
- Helps reduce airborne contamination
- Helps prevent grease leakage
- Repeatable torque performance
- Designed to meet ISO torque accuracy requirements
FG Cleanroom Series Models
The FG Cleanroom Series is available in both standard cleanroom and HVG (High-Vacuum Grease) configurations for contamination-sensitive fastening applications.
All models utilize Mountz cam-over technology and are designed to meet or exceed ISO 6789:2017 accuracy and repeatability requirements (±6% of setting). The cleanroom models feature low-outgassing materials, dynamic wear-resistant seals, and contamination-control features to help reduce airborne particles and grease leakage.
FG Cleanroom Torque Range Lineup
FG-25z CR / FG-25z CR-HVG
3.5–17.6 cN·m
FG-50z CR / FG-50z CR-HVG
7.1–35.3 cN·m
FG-8i CR / FG-8i CR-HVG
18–90 cN·m
FG-20i CR / FG-20i CR-HVG
22–226 cN·m
FG-40i CR / FG-40i CR-HVG
0.4–4.5 N·m
FG-125i CR / FG-125i CR-HVG
2.8–14.1 N·m
Model Selection Guide
Need a micro-torque screwdriver for miniature fasteners?
Choose:
- FG-25z CR
- FG-25z CR-HVG
- FG-50z CR
- FG-50z CR-HVG
These models are designed for low-torque fastening applications commonly found in semiconductor, electronics, optics, and laboratory assemblies.
Need a standard cleanroom production screwdriver?
Choose:
- FG-8i CR
- FG-20i CR
- FG-40i CR
- FG-125i CR
These models utilize standard polyurea grease and are designed for cleanroom manufacturing environments requiring contamination control and repeatable torque performance.
Need an ultra-high vacuum solution?
Choose:
- FG-8i CR-HVG
- FG-20i CR-HVG
- FG-40i CR-HVG
- FG-125i CR-HVG
HVG models utilize specialized ultra-high vacuum grease with exceptionally low vapor pressure for highly sensitive vacuum and optics applications where VOC emissions must be minimized.
Need a cleanroom screwdriver for medium torque applications?
Choose:
- FG-40i CR
- FG-40i CR-HVG
- FG-125i CR
- FG-125i CR-HVG
These models offer higher torque capacities and include a removable cleanroom-friendly T-bar with a press-fit design.
FG Cleanroom Models
Standard Cleanroom Models
| Model | Item Number | Torque Range | Drive Size |
|---|---|---|---|
| FG-8i CR | 076452 | 1.6–8 lbf.in (18–90 cN·m) | 1/4" Female Hex |
| FG-20i CR | 076453 | 2–20 lbf.in (22–226 cN·m) | 1/4" Female Hex |
| FG-40i CR | 076454 | 4–40 lbf.in (0.4–4.5 N·m) | 1/4" Female Hex |
| FG-125i CR | 076455 | 25–125 lbf.in (2.8–14.1 N·m) | 1/4" Female Hex |
High-Vacuum Grease (HVG) Models
| Model | Item Number | Torque Range | Drive Size |
|---|---|---|---|
| FG-8i CR-HVG | 076458 | 1.6–8 lbf.in (18–90 cN·m) | 1/4" Female Hex |
| FG-20i CR-HVG | 076459 | 2–20 lbf.in (22–226 cN·m) | 1/4" Female Hex |
| FG-40i CR-HVG | 076460 | 4–40 lbf.in (0.4–4.5 N·m) | 1/4" Female Hex |
| FG-125i CR-HVG | 076461 | 25–125 lbf.in (2.8–14.1 N·m) | 1/4" Female Hex |
Standard Cleanroom vs HVG Models
Standard Cleanroom Models
- Polyurea grease
- General cleanroom manufacturing applications
- Blue-green grease
- Temperature range: -40°C to +276°C
- Calibration interval: 20,000 cycles
- Routine maintenance interval: 100,000 cycles
HVG Models
- Ultra-high vacuum grease
- Ultra-high vacuum and optics applications
- Translucent white grease
- Temperature range: -20°C to +325°C
- Calibration interval: 5,000 cycles
- Routine maintenance interval: 50,000 cycles
Which FG Cleanroom Model Should I Select?
Start with these questions:
- Is the application performed in a cleanroom environment?
- Is ultra-high vacuum compatibility required?
- What torque value is required?
- Is contamination control critical to product quality?
- Are optics, semiconductor, or vacuum systems involved?
- Is low outgassing a requirement?
- Will the tool be used for micro-torque or medium-torque fastening?
- Is maximum calibration life important?
The answers to these questions will help determine the appropriate FG Cleanroom Series model for the application.
Setup & Adjustment
Internal Torque Adjustment
FG Cleanroom screwdrivers utilize an internal adjustment mechanism.
To adjust torque:
- Remove the end cap.
- Use the appropriate hex key to adjust the torque setting.
- Verify the torque value using a calibrated torque analyzer.
- Seal the end cap with a calibration sticker if required by internal quality procedures.
- Verify performance before releasing the tool for production use.
FG Cleanroom tools do not feature an external adjustment scale. The tamper-resistant internal adjustment design helps prevent unauthorized torque changes.
Can Torque Be Changed Later?
FG Cleanroom screwdrivers are designed to operate as preset torque tools.
If a different torque value is required, the internal adjustment mechanism can be used to reset the tool within its specified torque range. The new setting should be verified using a calibrated torque analyzer before the tool is returned to service.
For production environments, torque adjustments are typically performed by authorized personnel as part of a calibration or quality control process.
Use Cases (Real-World Examples)
1. Semiconductor Manufacturing
Problem: Airborne contamination affects sensitive production environments
Solution: Cleanroom screwdriver minimizes contamination and grease leakage
2. Medical Device Assembly
Problem: Over-tightening damages delicate assemblies
Solution: Cam-over clutch prevents excessive torque application
3. Optics & Laboratory Equipment
Problem: Precision assemblies require contamination-controlled fastening
Solution: Low-outgassing materials support cleaner assembly environments
4. Aerospace Manufacturing
Problem: Operators need consistent torque during repetitive fastening
Solution: Preset torque improves fastening repeatability across production lines
Troubleshooting
Issue 1: Torque feels inconsistent
Cause: Tool out of calibration
Solution: Recalibrate using a torque analyzer or send to a calibration lab
Issue 2: Tool slips too early
Cause: Torque set too low or internal adjustment drift
Solution: Reset torque using calibration equipment
Issue 3: Contamination concerns remain
Cause: Improper cleaning procedures or workstation contamination
Solution: Follow cleanroom handling and cleaning protocols
Issue 4: Operator thinks tool is broken
Cause: Misunderstanding of cam-over behavior
Solution: Train operator that clutch release indicates correct torque reached
Issue 5: Grease leakage observed
Cause: Seal wear or improper maintenance
Solution: Inspect seals and service tool if necessary
Calibration & Standards
FG Cleanroom tools are designed to meet ISO torque accuracy and repeatability requirements.
Recommended calibration intervals may include:
- Every 5,000 cycles
- Every 12 months
- Based on internal quality standards
- After the tool is dropped or damaged
Certain FG cleanroom models offer calibration life up to 20,000 cycles before recalibration.
Torque verification using a calibrated torque analyzer helps support:
- Product quality
- Process consistency
- Reliable fastening performance
- Compliance with internal quality procedures
Cleanroom Protection Notes
Why Cleanroom-Compatible Tools Matter
Cleanroom manufacturing environments require strict contamination control to help protect:
- Semiconductor components
- Medical devices
- Optical assemblies
- Laboratory equipment
- Sensitive electronics
Even small airborne particles or grease contamination can negatively impact assembly quality and product reliability.
Cleanroom Features
FG Cleanroom screwdrivers include:
- Low-outgassing powder coat finish
- Wear-resistant internal seals
- Protective polyurethane sleeve
- Grease leakage prevention features
- Materials designed for clean manufacturing environments
Cleaning Recommendations
The tools can withstand frequent wiping and cleaning using:
- Water-based cleaning procedures
- Isopropyl alcohol-based solvents
The tools are not designed to be submerged.
Integration / Advanced Notes
- Manual fastening tools only
- No PLC or MES integration
- No built-in torque traceability
- Depends on proper calibration and contamination-control procedures
- Internal tamper-resistant torque adjustment
- Designed for cleanroom manufacturing environments
Media & Supporting Content
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Related Articles / Content
- Webinar: How to Select a Cleanroom or ESD Screwdriver for a Torque Application
- Mountz Hand Tools Sales Bang Sheet
- Case Study: FG Cleanroom Screwdriver Compatibility for Precision Optics Assembly
- White Paper: FG Cleanroom Screwdrivers: Redefining Precision in Critical Environments
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
