Description
US-built control panels, instrument skids and inverters often list screw torque in inch-pounds. The Snap-on QD1R50A torque wrench reads in that unit, from 10 to 50 in-lb. It pairs that light scale with a 1/4″ square drive and a fixed ratchet head. As a result, it fits inside crowded enclosures where a larger tool cannot turn.
Why in-lb, and what it means in N·m
Inch-pounds give finer steps than ft-lb at the bottom of the scale. For reference, 12 in-lb equal 1 ft-lb, so the whole QD1R50A range sits below about 4.2 ft-lb. In metric terms, 10 in-lb is roughly 1.13 N·m, and 50 in-lb is about 5.65 N·m. Therefore a 3 N·m terminal spec converts to about 26.5 in-lb on this wrench. However, if most of your drawings are metric, Snap-on also offers N·m models such as the QD1RN6B and QD1RN25B.
Power, oil and gas, and solar uses
- Terminal screws in MCC and switchgear compartments.
- Gauge mounts, instrument fittings and small cover screws on oil and gas skids.
- Junction box lids, combiner box terminals and inverter covers on solar sites.
- Sensor and transmitter housings that crack under excess load.
In each case, the QD1R50A ratchet keeps the socket seated while you move your hand inside a tight panel.
Setting the Snap-on QD1R50A torque wrench for light loads
Light settings reward patience. First, turn the handle to your value and confirm the reading on the scale. Next, seat the socket fully and pull slowly, with your hand on the grip. Stop at the click. At low values the signal feels soft, so train new staff on a scrap joint before live work. Also skip adapters and long extensions where you can, because they add flex at this scale.
Care for a 1/4 in click wrench
Small wrenches take more falls than big ones, and a fall can shift the reading. So keep the Snap-on QD1R50A torque wrench in its case or in a marked drawer slot. Return it to the lowest setting at the end of the day. In addition, many teams check low-range wrenches on a bench torque tester between formal calibration visits.
Ordering through Lost in HCM
The QD1R50A appears on SMK Vietnam on behalf of Lost in HCM, our supply partner. Lost in HCM prepares the quote, including price and lead time. When you are ready, request a quote from Lost in HCM. For other sizes, browse torque wrenches, or contact SMK Vietnam if you need help choosing. Brand information sits on snapon.com.
QD1R50A FAQ for panel and field technicians
What is 50 in-lb in N·m?
About 5.65 N·m. The 10 in-lb low end of the QD1R50A is close to 1.13 N·m.
Is the Snap-on QD1R50A torque wrench a good fit for terminal screws?
Yes, when the spec falls between 10 and 50 in-lb. Check the equipment manual first, since terminal values vary with screw size.
Can I buy it straight from SMK Vietnam?
No. Lost in HCM supplies the QD1R50A and handles the quote and delivery.
Reviews
There are no reviews yet.