Description
Plant mechanics at power stations and process sites often meet heavy bolts in cramped spots. The Snap-on QD3FR250A torque wrench answers with a 1/2 inch flex head on a 50-250 ft-lb click wrench. So the handle can angle past pipework while the socket stays square on the nut.
An 80-tooth flex head on the QD3FR250A
Snap-on lists 80 gear teeth and a 4.5 degree swing arc for this head. That means the ratchet picks up a new tooth with a short movement of the handle. In addition, the head measures 1-5/8 inches wide and 3/4 inch deep, which helps it reach recessed nuts. The full tool runs 25-3/4 inches long, so it gives good leverage at the top of the range.
Clockwise only, by design
Snap-on marks the QD3FR250A for clockwise-only calibration. Therefore, use it to tighten standard right-hand threads. For left-hand threads, choose a model that the maker calibrates in both directions. Also, the QD series carries a ±4% clockwise rating from 20% of full scale. Here that means 50 to 250 ft-lb, which is the whole range.
Power, oil and gas, and renewable sites
- Pump, valve and flange bolts in oil and gas plants.
- Switchgear frames and generator mounts in power stations.
- Solar tracker and wind tower hardware during installation and service.
In each case, the QD3FR250A needs no batteries, so it stays ready in a site toolbox.
Snap-on QD3FR250A torque wrench dimensions
| Drive | 1/2 in square |
| Head | Flex head, 80 teeth, 4.5° arc |
| Range | 50-250 ft-lb |
| Increments | 1 ft-lb |
| Length | 25-3/4 in |
| Head width / depth | 1-5/8 in / 3/4 in |
| Calibration direction | Clockwise only |
| QD series accuracy | ±4% clockwise, 20% to 100% of full scale |
Ordering the Snap-on QD3FR250A torque wrench
SMK Vietnam lists this tool, and Lost in HCM supplies it and confirms price and lead time. To begin a QD3FR250A order, request a quote from Lost in HCM. Lost in HCM also lists the 3/4 inch QD4R600A for heavier joints and the 3/8 inch QD2R100A for lighter ones. Besides that, you can browse all torque wrenches, contact SMK Vietnam, or read more on snapon.com.
QD3FR250A questions
Can I tighten left-hand threads with it?
Snap-on calibrates this model clockwise only. So use a wrench rated for counterclockwise work on left-hand threads.
How fine are the scale steps?
Snap-on lists 1 ft-lb increments across the 50-250 ft-lb range.
How do I set a metric spec?
Divide the N·m value by 1.356 to get ft-lb. For example, 200 N·m comes to about 148 ft-lb.
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