Snap-on QD4R400A Torque Wrench, 3/4″ Drive Fixed Ratchet Click Type, 80-400 ft-lb

Description

Long studs and deep nuts make heavy bolting slow when the wrench has no ratchet. The Snap-on QD4R400A torque wrench solves that with a fixed ratchet head on a 3/4″ drive. In addition, its adjustable click scale runs from 80 to 400 ft-lb, a wide band for heavy-duty joints.

A 3/4-inch wrench that starts low

For example, other 3/4″ models on this site start at 120 or 200 ft-lb. By contrast, the QD4R400A starts at 80 ft-lb. So one tool can cover both mid-weight and heavy fasteners on the same machine, such as a gearbox cover and its base bolts.

Jobs for the Snap-on QD4R400A torque wrench

• Excavator, loader and bulldozer service in construction fleets.
• Tractor and harvester overhauls before the crop season.
• Mill, crusher and conveyor frames in cement and quarry plants.
• Large pump and fan bases in water and utility works.

QD4R400A or QD4600A?

Both use a 3/4″ drive, yet they suit different work.

Choose the QD4R400A when you need the ratchet for run-down, or when many targets sit below 120 ft-lb. On the other hand, pick the QD4600A when most targets climb above 400 ft-lb.

Technique for a heavy pull

First, brace your feet and pull the handle toward you, square to the bolt. Then slow down near the target and stop at the click. Also make sure the socket sits fully on the nut, because a tilted socket can slip.

Upkeep after field work

Clean mud and grease off the QD4R400A head after each job, since grit can wear the ratchet. Then turn the scale down to 80 ft-lb and store the wrench in its case. Finally, schedule outside calibration checks at a set interval.

Order in Vietnam

Lost in HCM supplies the wrench and prepares every quote. To get yours, request a quote from Lost in HCM. For other drive sizes, browse our torque wrenches or contact SMK Vietnam for advice. Product news from the maker appears on snapon.com.

Common buyer questions

Why buy the Snap-on QD4R400A torque wrench instead of a 1/2-inch model?

Its 3/4″ drive takes heavier sockets, and it reaches 400 ft-lb, well beyond the 1/2″ models listed here.

Which unit does it read?

The product name gives its range in ft-lb. For N·m specs, divide by 1.356 to find the setting.

Who handles delivery?

Lost in HCM supplies the wrench and confirms delivery in its quote.