BESL3 Series 120VAC Direct Plug-In Screwdrivers
Operation Manual
www.deltaregis.com
Page 4
An external torque adjustment nut located at the nose of the screwdriver is used to set the output torque of the screwdriver. A
reference scale (0–8) is available as a guide —
this scale is for reference only and does not indicate actual torque values
. Rotate
the torque nut clockwise (covering higher numbers on the scale) to increase torque output, ccw to decrease torque output.
Always make adjustments starting below the desired torque and working upward in gradual increases.
We recommend the use of an appropriate torque tester and static joint testing after installation to verify proper torque settings.
A torque lock sleeve is included with the tool. This sleeve replaces the tool’s housing nut and covers the torque adjustment nut to
deter tampering.
Please note that, on a new tool, the torque output may decline during the initial break-in period. The decline will become minor
and stabilized afterwards. To ensure required torque output, the user should check torque output periodically with a torque meter
and adjust as required.
Setting the Torque
Getting Started
Unpack the screwdriver from its box and confirm that all items have been received in good condition. The screwdriver is shipped
with the appropriate grounded power cord for connection to the AC supply receptacle.
Select a suitable location for plugging in the screwdriver. Ensure that the location allows for the required range of motion of the
screwdriver without stressing the power cable. The cable should bend naturally and always have some play in it. Undue stress put
on the cable will result in premature cable failure.
Installing Driver Bits
Retract the sleeve on the bit holder and insert the desired 1/4” hex power bit. Release the sleeve and ensure that the bit is properly
locked in place by pulling back and forth on the bit.
Make sure that the tool’s start mechanism (lever or push-start) is not engaged and the fwd/off/rev switch is in the ‘off’ position to
prevent the tool from accidentally starting when plugging in the tool.
Depending on the model of screwdriver selected, the screwdriver will have either a start lever or a push-to-start mechanism
(models with ‘P’ suffix). All models also have a forward/off/reverse switch. Please note that the center position of this switch is ‘off’.
The screwdriver switch should be left in the off position when the tool is not being used for any extended length of time.
Hold the tool grip securely in your hand so that the index finger is over the trigger mechanism (on a lever start model) and the
thumb can be used to cycle the fwd/rev switch if necessary. For higher torque models, we recommend the use of a torque reaction
arm to improve operator ergonomics.
Familiarize yourself with the operation of the tool by free running the tool before use at higher torque values.
Note — Do not switch from forward to reverse (or reverse to forward) while the motor is running.
Recommended Grip
Driving the Fastener
Put the fwd/rev switch in the forward position. For lever start models, squeeze the trigger and hold until the clutch reacts. If using
a push-to-start model, apply adequate downward force to start the tool and hold until the clutch reacts and the tool shuts off. The
preset torque will not be reached if the trigger mechanism is released before the clutch activates. Ensure that enough downward
force is applied to prevent the screwdriver bit from camming out of the fastener during the rundown process.
