There are different technologies and options in the market when it comes to torque electric screwdrivers for the assembly industry, but how do you choose the right one for your particular needs?
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Here are some points to consider when evaluating the ideal screwdriver for your assembly line.
Target Torque &#; Probably the most important data point to consider when selecting an electric screwdriver, make sure the target torque is within the screwdrivers torque range. Constant use above 80% of the screwdrivers nominal capacity is not recommended and can wear out the motor.
Precision Level &#; Each assembly process has different quality and repeatability requirements and different technologies will allow you to reach the precision level your application need.
As a rule of thumb you can expect the following precision range for these technologies:
Clutch Control: +/- 7%
Current Control: +/- 5%
Transducerized: +/- 3%
(meaning the actual torque value will be within the percentage indicated above)
Angle Requirement &#; Some applications have specific angle requirements and not all screwdrivers have angle monitoring and control; you typically have to move into the higher end of the torque tool market in order to have this capability.
Speed Requirement &#; Some applications require specific speed levels to meet the assembly quality needs and productivity rates.
Multiple Torque Capability &#; Some applications require more than one torque to be applied during assembly, typically due to different screws being used for different parts. Rather than using multiple screwdrivers, an operator can utilize a multi-torque screwdriver that can be programmed to handle a variety of torque levels (up to 100 with Kolver&#;s K-Ducer line).
Output Signal &#; For quality and process control, some applications require output signals; some common signals are START, STOP, and OK, but more sophisticated systems can output many more.
Input Signal &#; If you need to remotely control the operation of the assembly process, make sure the screwdrivers controller has the input signals available. These signals can allow you to start & stop the screwdriver or even change programs or configurations from a PLC or PC.
Fastening Data &#; Some applications need to gather, register and export the operation data for quality control and traceability. If this is a requirement make sure your assembly system can process and export this information. Common data that can be exported is Target and Final Torque, Screw #, Program #, Angle, of course date and hour, as the screwdrivers information.
These are some important factors to consider when selecting the right torque screwdrivers for your assembly needs. However, there&#;s many other important considerations to take into account when evaluating a purchase &#; ergonomics, performance, reliability, cost, and more.
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Kolver USA
Kolver K-Ducer Transducer System
Ratchet It Up and Add Multi-Bits
You will face jobs that require the use of a &#;hand-powered&#; screwdriver, but also demand speed and torque. How do you get as much speed and torque from your screwdriver without resorting to battery power?
The simple answer is to use a ratchet screwdriver that uses multi-bits.
A ratchet screwdriver with a good, solid mechanism will allow you to turn screws with greater speed and higher torque. This will still give you hand-control over the application. Look out for mechanisms in the ratchet screwdriver. These allow you plenty of control over the torque as you tighten or loosen.
Pay attention to the manufacturing of bar and tip of your screwdriver. Look for chrome vanadium steel as this is both strong and corrosion-resistant. Sand blasted tips provide a secure grip in the slot or recess of the screw head.
Bits are important to consider also.
Rather than fiddling around with several different screwdrivers according to the sort of head fitted on them, a multi-bit screwdriver is supplied with interchangeable adaptors that magnetically hold a variety of bits, from standard 1/4&#; hex drive Phillips to 1/4&#; hex drive torx.
Keeping track of your multi-bits while on site may be tricky, so look for a ratchet screwdriver that has some sort of internal, or adequate, safe external, storage.
Here&#;s a great example of a multibit ratchet screwdriver to consider:
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