The TLS is a pre-set torque screwdriver that’s ideal for production applications where over-torque conditions are not tolerated. Built with a cam-over design, the accurate TLS torque screwdriver prevents a fastener or bolt from being over-torqued. The design action of the cam-over torque screwdriver is such that when the tool reaches its pre-set torque value the mechanism disengages from the drive thus limiting the torque applied. Designed for variety of industries like aerospace, automotive, electronics, energy, medical, and packaging, the Mountz Inc. TLS torque screwdriver ensures proper torque control.

A pre-set 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.

Built with a cam-over design, the accurate TLS torque screwdriver prevents a fastener or bolt from being over-torqued. The design action of the torque limiting screwdrivers is such that when the tool reaches its set torque value the mechanism disengages from the drive thus limiting the torque applied. Inside the screwdriver, a precision radial ball clutch “slips-free” when the set torque is reached preventing over-torquing. Also, the thrust bearings insure that the torque setting is independent of any end load applied by the operator.

Designed and manufactured to meet or exceed the accuracy and repeatability requirements of ISO6789: 2003, Mountz offers various TLS torque screwdriver models that range from 0.7 ozf.in to 120 lbf.in. Featuring a tamper-proof internal adjustment, the torque screwdrivers have no external adjustment scale and must be preset using a torque tester.

Mountz also offers the TLS torque screwdrivers in clean room configuration. The clean room torque screwdrivers are manufactured to comply with Class 100 Clean Room standards and are polished and sealed with a PTFE impregnated anodized coating that creates a tool nearly 40 times as clean as “off the shelf” torque tools.

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. The cam-over philosophy of each Mountz torque screwdriver prevents operators from influencing the torque output when tightening fasteners.

Once a torque specification is determined, the joint should be audited to verify the product has been fastened to the specified torque. There are three common torque test methods that have been established to provide an accurate reference to the applied torque.

1) First Movement Test – Once the fastener has been tightened, employ the use of torque measuring tool. Mark the tightened fastener and surrounding application. In the tightening direction, begin to slowly apply force to the tool until the first movement in the fastener is noted. The reading recorded is a good indication of the original torque applied to the joint. This is the best way to determine residual torque.

2) Loosening Test – This is a similar process to the first movement test described above, except instead of the tightening the fastener, the torque is applied in the direction that loosens the fastener. At the point the fastener breaks loose, the torque reading is recorded. The torque value to loosen the fastener is the approximate torque that was applied to the joint.

3) Marking Test – Once the fastener tightened, mark clearly the surface of the fastener, nut or bolt and continuing the mark onto the surface being clamped for reference. This time loosen the fastener and retighten until the marks on both application and fastener are aligned. The torque required to return the fastener to its original location is the reference to the original torque applied to the fastener.

Which torque testing method do think is the best to use and why?

The TSN is a pre-set torque wrench that’s ideal for maintenance and production applications where over-torque conditions are not tolerated. Built with a cam-over design, the accurate TSN torque wrench prevents a fastener or bolt from being over-torqued. The design action of the cam-over torque wrench is such that when the tool reaches its pre-set torque value the mechanism disengages from the drive thus limiting the torque applied. Designed for variety of industries like aerospace, automotive, electronics, energy, medical, and packaging, the Mountz Inc. TSN torque wrench ensures proper torque control.

A pre-set torque wrench is similar to a person setting an alarm clock to signal the achievement of a selected time. The torque wrench is pre-set to the required torque value of the application and then the tool signals the operator when torque is achieved.

Inside the TSN torque wrench, a precision radial ball clutch “slips-free” when the pre-set torque is reached preventing the fastener from being over-torqued. The use of a cam-over torque wrench takes the operator influence out of the torque equation and offers more accurate and repeatable results than a standard ‘click’ type wrench. A click wrench typically breaks about 3 degrees after set torque is reached and then becomes positive. If the operator continues to pull on the click wrench, he or she can over tighten the fastener.

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When planning a production area, it pays dividends in the long term to plan the ergonomics of the operation and consult a health and safety inspector or ergonomic manager. Ensure both the workplace and the assembly operation are compatible with the majority of operators who will work there. This can reduce future costs arising from work-related health disorders among operators, along with costs arising from poor product quality. Also, the need to redesign the production system later may be avoided.

The goal for all ergonomic and safety managers is to reduce the number of people suffering from work-related injuries. With the cost for worker’s compensation continuing to increase, companies are looking for ergonomic solutions to reduce the costs of insurance claims.

In the Assembly Area, Does Your Company Have a Strategy for Reducing Injury Loses?

Every workstation is unique. The human being represents the largest collection of variables; therefore a workstation that suits one operator perfectly may be a disaster for another. This could be one of the reasons why problems often arise unexpectedly when a new production unit is started up.

The goal must be to design workstations where every member of the actual workforce can work comfortably. This calls for a large degree of adjustability that often increases the cost. However, the investment can be justified by the resulting high flexibility.

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