Snap-on TQSS4A Torque Driver, 50 in-lb Stubby Torqometer U.S. Basic Dial, 5-1/4″ Body, 1/4″ Square Drive Handle

Description

Behind a helm console, a technician often works by feel with one arm through a hatch. That is where screws on gauges, switch panels and battery terminals get over or under tightened. The Snap-on TQSS4A torque driver brings a readable dial into that space. It covers values up to 50 in-lb on a body just 5-1/4 inches long.

Boatyard work for the Snap-on TQSS4A torque driver

Shipyards and boat builders along the coast, from Hai Phong to Vung Tau, fit out patrol craft, ferries and fishing vessels. As a result, their electrical teams face small fasteners in tight bays. Common TQSS4A jobs include:

• Gauge and switch panel screws on the helm console.
• Navigation light housing and bracket screws.
• Busbar and terminal screws in distribution panels, when the label gives a value in range.
• Sensor and sender screws in the engine room.

Always take the value from the equipment maker, though. Snap-on does not describe this driver as insulated, so isolate circuits before work.

What Snap-on lists for the 50 in-lb stubby

The Torqometer U.S. chart places the TQSS4A on its 50 in-lb row. Its figures are simple, so buyers can compare quickly:

• Stubby Basic model with one live needle.
• Range of 50 in-lb, marked in 1 in-lb steps.
• Length of 5-1/4 inches.
• PB47 storage case included.
• Internal 1/4 inch square drive in the handle.

In metric terms, full scale equals about 5.6 N·m. The stated 2% applies from 20% of the scale, so plan targets between roughly 10 and 50 in-lb.

Bits or sockets

Because the handle takes a 1/4 inch square drive, the TQSS4A accepts a small socket or a square-drive bit holder. For instance, one driver can run a slotted terminal screw and then a small nut on a light bracket.

Sizing up or down from the TQSS4A

Most marine terminal values sit in the middle of this dial, which is where it reads best. However, a very light screw near 10 in-lb reads better on the 30 in-lb TQSS2.5A. Above 50 in-lb, the stubby TQSS6A extends the scale to 75 in-lb. Also, the TQS4A shares this scale on an 8-11/16 inch body if you want a longer grip. Meanwhile, the TQSS4FUA adds a peak pointer for sign-off checks.

Salt air and the Snap-on TQSS4A torque driver

Salt spray attacks any tool that lives in a vessel’s bilge for long. So never rinse the dial under water. Instead, wipe the TQSS4A with a dry cloth after each job and store it in its PB47 case with a desiccant pack. Then send it for checks on the interval your quality plan sets, and sooner after any drop on a steel deck.

Getting the Snap-on TQSS4A torque driver to your yard

SMK Vietnam shows this driver for our partner Lost in HCM, which supplies it and quotes each request. Go ahead and request a quote from Lost in HCM with the quantity and yard address. You may also compare other torque screwdrivers, open the Snap-on site, or contact SMK Vietnam.

Marine electrician FAQ

Can the TQSS4A work on live boat circuits?

No. Snap-on gives it no insulation rating. Isolate the battery bank or shore power before you check terminals.

Is the TQSS4A short enough for a helm console?

Its 5-1/4 inch body reaches many console screws. Still, measure the gap behind the panel with the bit fitted.

What does a 50 in-lb dial equal in N·m?

Full scale is about 5.6 N·m. One in-lb equals roughly 0.113 N·m, so convert metric labels before each job.