sales@foscoconnect.com
(510) 319-9878
Silicon Valley, CA, USA
Product Overview
The Wiha 28501 TorqueVario-S is a professional-grade precision torque screwdriver engineered for exact fastening in critical assembly, repair, and manufacturing applications. Featuring an adjustable torque range of 15 to 80 in-oz, this tool enables network engineers and technicians to apply accurate, repeatable torque force. When the precise, pre-set torque limit is reached, the tool provides immediate tactile and audible feedback (a perceptible click), safeguarding delicate components against over-tightening.
To ensure consistency across tasks, the TorqueVario-S integrates a specialized adjustment tool requirement, actively preventing operators from unintentionally altering the torque limits during active use. The driver features a built-in, highly visible window scale that clearly displays the set torque value, eliminating guesswork and false readings on the bench or in the field.
Key Specifications and Features
- Torque Range: 15 to 80 in-oz (adjustable)
- Tension Feedback: Audible and perceptible click upon reaching target torque
- Display: Integrated window scale for clear torque value visibility
- Tamper Resistance: Requires included adjustment tool to modify torque settings, preventing accidental alterations
- Interface: Equipped with a 4-mm micro bit holder for precision jobs
Package Contents
- Wiha 28501 TorqueVario-S Screwdriver
- Torque-setter adjustment tool
- 4-mm micro bit holder
- Factory calibration certificate
- Instruction manual
- Protective hard plastic storage tube
Frequently Asked Questions
Q: How do I adjust the torque setting on the Wiha 28501?
A: The torque limit is set exclusively using the included torque-setter adjustment tool. This specific design choice ensures the torque setting cannot be accidentally changed by the user's grip or movement during standard operation.
Q: What size precision bits does this torque screwdriver accommodate?
A: The tool comes with a dedicated bit adapter that securely holds standard 4-mm micro bits, making it ideal for precision electronics and fiber optic equipment housing hardware.

