FG Mini Preset Torque Screwdrivers

Quick Answer

FG Mini screwdrivers deliver a fixed, repeatable torque using a cam-over clutch. They are ideal for small fasteners and precision applications where over-torque must be prevented.

Who This Is For

Manufacturing & process engineers
Assembly operators
Quality & calibration teams
Medical, electronics, and aerospace manufacturers
CX and Sales teams supporting hand tools

When Should You Use This?

Use FG Mini preset screwdrivers when:

Torque must remain fixed and controlled
You are working with small fasteners / low torque ranges
Multiple operators need consistent results
Over-tightening could damage components

When Should You NOT Use This?

Do not use FG Mini if:

Torque values need to change frequently → use an adjustable tool
Higher torque ranges are required → use standard FG models
Torque data capture or traceability is required → use a transducerized system

How FG Mini Preset Screwdrivers Work

FG Mini tools use a cam-over clutch mechanism:

Torque builds during fastening
Once the preset torque is reached, the tool “slips”
Prevents additional torque from being applied

Result:
Consistent torque, reduced fastener damage, and improved quality control

Core Features

Internal, tamper-resistant torque adjustment
Cam-over clutch for torque limiting
Compact, lightweight design
Designed for micro-torque applications
±6% torque accuracy (ISO compliant)

Available Models

The FG Mini Series includes two preset torque screwdriver families designed for low-torque and precision fastening applications. Each model can be preset to a specific torque value within its operating range and features a 1/4" female hex drive.

Color-Coded Model Options

FG Mini preset screwdrivers are available with four color-coded labels to help identify torque settings throughout production environments.

FG-25z

Label Color	Item Number	Torque Range	Drive Size
Blue	076705	3–25 ozf.in (2–17.7 cN·m)	1/4" Female Hex
Red	076706	3–25 ozf.in (2–17.7 cN·m)	1/4" Female Hex
Green	076707	3–25 ozf.in (2–17.7 cN·m)	1/4" Female Hex
Gold	076708	3–25 ozf.in (2–17.7 cN·m)	1/4" Female Hex

FG-50z

Label Color	Item Number	Torque Range	Drive Size
Blue	076709	10–50 ozf.in (7.1–35.3 cN·m)	1/4" Female Hex
Red	076710	10–50 ozf.in (7.1–35.3 cN·m)	1/4" Female Hex
Green	076711	10–50 ozf.in (7.1–35.3 cN·m)	1/4" Female Hex
Gold	076712	10–50 ozf.in (7.1–35.3 cN·m)	1/4" Female Hex

Color coding helps operators quickly identify torque tools assigned to different fastening applications while reducing the chance of using the incorrect preset screwdriver.

Model Selection Guide

Choose the FG-25z when:

Torque requirements are between 3–25 ozf.in (2–17.7 cN·m)
Working with micro-fasteners
Maximum precision is required
Limited working space requires a compact screwdriver

Choose the FG-50z when:

Torque requirements are between 10–50 ozf.in (7.1–35.3 cN·m)
Higher micro-torque is required
Small fasteners still require precise torque control

Either model is a good choice when:

Over-torque prevention is important
Multiple operators require consistent torque
A compact preset screwdriver is preferred
Color-coded tool identification would benefit the production process

Consider another Mountz screwdriver when:

Higher torque is required → Use a standard FG Preset Screwdriver
Torque values change frequently → Use an FGA Adjustable Screwdriver
ESD protection is required → Use an FG Mini ESD Preset Screwdriver
Torque data collection and traceability are required → Use an ECT- or EPT-Series Smart Screwdriver

What's Included

Each FG Mini preset screwdriver includes:

FG Mini preset screwdriver
Factory calibration certificate

The screwdriver can be supplied preset to a specified torque value before shipment or adjusted later using a torque analyzer and the internal adjustment mechanism.

Setup & Adjustment

Internal Torque Adjustment

FG Mini tools use an internal adjustment mechanism.

To adjust torque:

Set up the screwdriver on a torque analyzer.
Use the adjustment hex key to modify the torque setting.
Verify the torque value using the analyzer.
Seal the end cap with a calibration sticker after adjustment.

FG Mini tools do not feature an external torque adjustment scale.

Factory Preset Option

FG Mini tools can be supplied preset to a specific torque value for immediate production use.

Can Torque Be Changed Later?

Yes.

FG Mini tools can be adjusted to a new torque value using a torque analyzer and internal adjustment mechanism. After adjustment, torque should be verified before returning the tool to production service.

Use Cases (Real-World Examples)

1. Medical Device Assembly

Problem: Small screws stripped due to over-torque
Solution: FG Mini ensures consistent torque and prevents damage

2. Electronics Manufacturing

Problem: Operator inconsistency across shifts
Solution: Preset torque eliminates variation between operators

3. Aerospace Components

Problem: Tight tolerance fasteners require precise torque
Solution: Cam-over mechanism ensures repeatable accuracy

Troubleshooting

Issue 1: Torque feels inconsistent

Cause: Tool out of calibration
Solution: Recalibrate using analyzer or send to lab

Issue 2: Tool slips too early

Cause: Torque set too low or internal adjustment drift
Solution: Reset torque using analyzer

Issue 3: Fasteners still stripping

Cause: Incorrect torque specification
Solution: Verify torque requirement for application

Issue 4: Operator thinks tool is broken

Cause: Misunderstanding of cam-over function
Solution: Train operator—slip indicates correct torque reached

Issue 5: Cannot adjust torque

Cause: No external adjustment (by design)
Solution: Use internal adjustment with proper tools

Calibration & Standards

FG Mini tools follow International Organization for Standardization ISO 6789-1:2017:

Recalibrate every 5,000 cycles, or
Based on internal quality requirements

Integration / Advanced Notes

No PLC or MES integration (manual tool)
No data capture or traceability
Depends on proper calibration program
Risk: Incorrect torque setting without analyzer verification

Media & Supporting Content

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

FG Mini Preset Torque Screwdrivers – FAQ & User Guide