Description
On a panel line, an operator who can turn a torque knob will sooner or later turn it. The Snap-on QDRIVER4P torque screwdriver removes that risk. It is a preset driver: the tool crib dials in one value with a setting tool and a tester, and the operator simply drives screws. Snap-on lists its setting range as 4 to 40 in-lb, or 45 to 451 N·cm.
What preset means on the Snap-on QDRIVER4P torque screwdriver
An adjustable driver has a scale and a knob that anyone can change. A preset driver has neither on the outside. Instead, a technician sets the value once, checks it on a torque tester and hands the tool out. As a result, the QDRIVER4P delivers the same spec on every shift until the crib decides to change it.
Features from Snap-on’s catalog
- Cam-over clutch that free-wheels when it reaches the set torque, so the operator cannot over-tighten the screw.
- Takes any standard 1/4-inch hex screwdriver bit, with magnetic bit retention.
- Red anodized aluminium body with a stainless steel shank.
- Tri-lobe grip for a firm, comfortable hold.
- ±6% accuracy, clockwise only.
Snap-on also lists the QDRIVER4P at 6 inches long. Because it works clockwise only, keep a plain screwdriver for removal.
Where 4-40 in-lb fits
That band equals about 0.45 to 4.5 N·m. In practice, the Snap-on QDRIVER4P torque screwdriver covers many terminal screws on breakers, contactors, DIN-rail terminals and power supplies. Its Lost in HCM listing tags the QDRIVER4P for power, oil and gas and renewable energy jobs. For example, a solar team could keep one driver per combiner-box spec, each one preset and labelled.
Picking between the 3P and the 4P
Choose by your target value. The QDRIVER3P covers 1.5-15 in-lb, while the QDRIVER4P covers 4-40 in-lb. So a 20 in-lb terminal belongs on the 4P, but a 10 in-lb screw sits nearer the middle of the 3P.
Keeping the Snap-on QDRIVER4P torque screwdriver on spec
Log each driver’s serial number and its set value. Next, verify it on a torque tester on a fixed calendar and again after any fall. Also keep the setting tool in the crib, not on the line, so the preset stays a preset.
How to order
SMK Vietnam lists the QDRIVER4P for our partner Lost in HCM, who supplies it and gives quotes. For a price, request a quote from Lost in HCM. You can also browse other torque screwdrivers, contact SMK Vietnam, or look up the QDRIVER range on snapon.com.
QDRIVER4P questions from tool cribs
Who sets the torque on a QDRIVER4P?
Usually the tool crib or a quality technician. They set it once with a setting tool, verify it on a tester and then issue it.
What bits does it take?
Snap-on says the preset drivers accept all standard 1/4-inch hex screwdriver bits, held by a magnet.
Can it loosen screws?
No. Snap-on rates the series for clockwise use only, so use a normal screwdriver to remove screws.
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