A preset torque screwdriver is similar to a person setting an alarm clock to signal the achievement of a selected time. The torque screwdriver is pre-set to the required torque value of the application and then the tool signals the operator when torque is achieved. A preset torque screwdriver does not feature an external adjustment scale. These tools have internal adjustment mechanism for setting the torque value and must be preset using a torque tester. Preset screwdrivers are ideal for production applications where there is one torque setting required and you need to prevent incidental or operator tampering of the torque setting. However, if the torque specification changes or new project requires a different torque setting, the preset torque screwdriver is still flexible enough that a new torque setting can be set internally using a torque analyzer.
The cam-over philosophy of each Mountz hand torque screwdriver prevents a fastener or bolt from being under and over tightened. These torque tools are ideal for production applications where over-torque conditions are not tolerated. As a quality control tool, the torque screwdriver allows any user to deliver the correct torque with confidence regardless of task and operator skill level.
The design action of the cam-over torque screwdriver is such that when the tool reaches its preset torque value the mechanism disengages from the drive thus limiting the torque applied. Also, the thrust bearings insure that the torque setting is independent of any end load applied by the operator. Designed for variety of industries like medical, aerospace, semiconductor, electronics, and communications, a Mountz preset torque screwdriver ensures proper torque control. Featuring a tamper-proof internal adjustment, the Mountz preset torque screwdrivers have no external adjustment scale and must be pre-set using a torque tester.
Use some caution when selecting a preset torque screwdriver from an industrial supplier. A low cost tool is a short term solution. It becomes a long term, nagging costly expense that impacts quality and reputation. Most torque screwdrivers feature a “ball clutch” design. This is where a ball bearing rolls over or hops over a static bar or cam position. The design limits the quality and life of the tool. It also causes the screwdriver to be out of calibration sooner, which increases the service cost of the tool. Another attribute often seen with a poorly designed screwdriver is a loose drive shaft or bit holder.
The radial cam design of the Mountz preset torque screwdriver allows for a smooth cam action with minimal wear on the tool. This provides precision torque control and extends the operating life cycle of the tool before necessary routine tool maintenance is required.
Designed and manufactured to meet or exceed the accuracy and repeatability requirements of ISO6789: 2003, Mountz offers a vast selection of preset torque driver models that range from 0.7 inch-ounces to 120 inch-pounds. Offering the most complete array of torque screwdrivers available on the market today, Mountz provides preset screwdrivers in different configurations to accommodate the various torque applications.
TLS Pro Torque Screwdrivers: Ergonomic preset torque screwdrivers
TLS Pro ESD Torque Screwdrivers: ESD compliant & ergonomic preset torque screwdrivers
TLS Torque Screwdrivers: The industry standard for screwdrivers, built with lightweight aluminum handles.
PSE Torque Screwdrivers: Similar to the TLS screwdrivers, but also features an ergonomic rubber grip and is an ESD compliant tool.
TLS – IFR Models (Impact Free Resetting): These models eliminate any small reaction during resetting. Ideal for applications with delicate and sensitive components.
TLS – OWC (One-Way Clutch with Locking Mechanism): The one-way clutch system is designed for the screwdriver to apply torque in one direction and lockup in the opposite direction for easy screw removal. Ideal for maintenance and refurbishing applications.
Clean Room Torque Screwdrivers: These tools are designed to meet and exceed Class 100 clean room standards.
Torque tools go out of calibration with use. Calibrating a torque tool is a fine-tuning process of bringing the tool back within its tolerance. Torque testers can also be used for quick tools tests on the line or in the lab to determine whether torque tools are holding a given setting.
Regular torque calibration of a hand screwdriver ensures accuracy, repeatable tool performance, and adherence to international standards. Torque testing also guarantees the torque equipment is operating to peak performance and can highlight any potential tooling problems before they arise perhaps due to tool wear or broken components.
Using a quality torque screwdriver makes a safer world through accuracy and precision. Controlling torque is essential for companies to ensure their product’s quality, safety and reliability isn’t compromised. The failure of a three-cent fastener that isn’t properly tightened can lead to catastrophic or latent failures. Fasteners that are insufficiently fastened can vibrate loose and excessive torque can strip threaded fasteners.
Request an appointment for preset torque screwdriver demonstration by a Mountz representative.