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)

FG Mini Models

The FG Mini Series includes two preset torque screwdriver models covering torque ranges from 3–50 ozf.in (2–35.3 cN·m). Each model can be preset to a specific torque value within its operating range and is available in multiple color-coded configurations.

How FG Mini Models Are Specified

Each FG Mini model represents a screwdriver family capable of being preset to a range of torque values.

The published range indicates the available torque settings that can be specified during setup or calibration.

Example

The FG-50z has an available torque range of 10–50 ozf.in (7.1–35.3 cN·m).

If your application requires 30 ozf.in, the screwdriver can be preset and verified at that torque value using a torque analyzer.

FG Mini Torque Range Lineup

2 cN·m → 35.3 cN·m

FG-25z

[2 ─────────────────────── 17.7]

FG-50z

    [7.1 ─────────────────────────────── 35.3]

Model Selection Guide

Need extremely low torque capability?

Choose:

FG-25z

The FG-25z provides a torque range of 3–25 ozf.in (2–17.7 cN·m) and is designed for micro-fasteners and delicate assembly applications.

Need a higher micro-torque range?

Choose:

FG-50z

The FG-50z provides a torque range of 10–50 ozf.in (7.1–35.3 cN·m) while maintaining the same compact size and ergonomic design.

Need a compact screwdriver for limited-access applications?

Choose:

FG-25z
FG-50z

Both models feature a compact design suitable for precision assembly and micro-fastening applications.

Need color-coded torque identification?

Choose either model.

Both FG Mini models are available with:

Blue label
Red label
Green label
Gold label

Color coding helps identify torque settings within production environments.

FG Mini Models

Model	Torque Range (ozf.in)	Torque Range (cN·m)	Drive Size
FG-25z	3–25	2–17.7	1/4" Female Hex
FG-50z	10–50	7.1–35.3	1/4" Female Hex

Label Color Options

Model	Blue	Red	Green	Gold
FG-25z	076705	076706	076707	076708
FG-50z	076709	076710	076711	076712

Which FG Mini Model Should I Select?

Start with these questions:

What torque value is required?
Is the application a micro-fastening or precision assembly process?
Are very small fasteners involved?
Is preventing over-torque critical?
Will multiple operators use the tool?
Is a compact screwdriver required due to limited workspace?
Is torque identification by color coding beneficial for the process?

The answers to these questions will help determine the appropriate FG Mini model for the application.

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.

Decision Guide

FG Mini vs Other Options

Use FG Mini when:

Low torque + small fasteners
Tight working space
High precision required

Move to other tools when:

FG Standard: Higher torque needed
Adjustable: Torque changes frequently
Smart Tools (ECT/EPT): Data tracking required

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