TORQOMETER® Newton Meter Light Signal (with Calibration Certificate) – TESI20LC

The dial torque wrench TESI20LC belongs to the Snap-on TORQOMETER® Newton meter dial torque wrenches range, and Lost in HCM supplies it to workshops and factories across Vietnam. The width, inches is 2-11/16 (68) mm. Snap-on lists the country of origin as USA.

Dial torque wrench TESI20LC overview

Plants and service teams that audit torque need a tool they can read, not just hear. The dial torque wrench TESI20LC answers that need with a clear N·m dial and ±2% accuracy from 20% of full scale. In short, it measures as well as it tightens.

Many members ship with a calibration certificate, and their part numbers end in C. Most models also carry a one-year Snap-on Repair Center warranty for repair or calibration. Lost in HCM supplies these wrenches to FDI plants with CO/CQ papers and a VAT e-invoice.

The storage case is PB9. The model is Light Signal. The head depth is 1-1/4 inches.

The increments is .5 N•m. The length is 9-29/32 inches. The range is 20 N•m.

The square drive is 3/8 inches.

Specifications at a glance

These figures come from the Snap-on listing for TESI20LC. Values marked “calculated” are unit conversions we added for convenience.

How the dial torque wrench works

Inside the wrench, a measuring beam flexes slightly as you pull on the handle. The dial mechanism then turns that small bend into needle travel across the scale. Because the scale reads in N·m, you see the applied torque directly.

First, you fit the socket and place the wrench square to the fastener. Next, you pull smoothly and watch the needle climb toward the value you need. Finally, you stop at the target, and on a Follow-up model the memory pointer holds the peak.

Key features of the dial torque wrench TESI20LC

Every model in this family shares the same dial design and the same ±2% accuracy promise. Here are the features that matter most when you compare options for your plant or workshop.

• Large Newton meter dial. The round dial reads directly in Newton meters, with increments as fine as 0.2 N·m on small models. As a result, technicians read the value at a glance without any unit conversion.
• Guaranteed 2% accuracy. Snap-on guarantees accuracy within ±2% of reading from 20% of full scale up to full scale. This holds in both directions, so the wrench suits audits as well as daily tightening.
• Three indicator models. Basic models show live torque, while Follow-up models add a memory pointer that holds the peak. Light Signal models add a light cue, so you can choose how each operator gets feedback.
• Wide range of capacities. Listed ranges start at 5 N·m for small fasteners and reach 2,800 N·m for heavy bolts. Therefore, one family can cover electronics benches, vehicle work, and large plant machinery.
• Drives up to 1-1/2 inch. Square drives run from 1/4 inch on the smallest models up to 1-1/2 inch on the largest. In addition, tool length grows with capacity, from about 10 inches to 80 inches.
• Calibration certificate options. Many part numbers ship with a calibration certificate, and their codes end in C. That way, a new wrench arrives with documents that quality teams can file right away.

Snap-on data sheet notes

Snap-on also lists these details for TESI20LC:

• Guaranteed Accuracy: Within ± 2% of the reading from 20% of full scale to full scale clockwise and counterclockwise.

Typical applications

These wrenches solve one problem well: measuring real torque on a joint. Below are typical jobs where that matters, from audits to heavy bolts. Each one also rewards a clear, recorded value.

• Torque audits on finished joints. Quality teams check a tightened bolt by pulling until it just moves and reading the dial. A Follow-up model holds that peak value, so inspectors can record it after the pull.
• Engine and gearbox assembly. Engine, axle, and gearbox bolts need steady torque in a known range. Therefore, a mid-range dial wrench with a 3/8 or 1/2 inch drive suits these shop jobs well.
• Heavy flange and structural bolts. Large models up to 2,800 N·m handle big flange, base, and structural bolts on plant machinery. Because these wrenches are long, check the swing space around each bolt before work.
• Left-hand thread fasteners. Some shafts, pulleys, and fittings use left-hand threads that tighten counterclockwise. A dial wrench keeps its ±2% accuracy in that direction, so you need no second tool.
• Small fasteners on precision parts. Models from 5 to 20 N·m with 1/4 or 3/8 inch drives suit small screws and bolts. For example, electronics, instruments, and pumps often call for these low values.
• Process trials and line setup. During process trials, engineers use a dial wrench to see how much torque a joint really needs. Then they set click or preset wrenches for the production line at that value.

Industries that use the dial torque wrench TESI20LC

Any sector that audits bolted joints needs a tool that reads torque, not just signals it. So dial wrenches show up in workshops, plants, and power sites. Here is how each industry uses them.

• Automotive service. Dealers and fleet workshops torque wheel, axle, and engine bolts every day. In Vietnam, many FDI and Japanese-brand service centers need recorded values, so a readable dial helps them pass audits.
• Vehicle and motorbike assembly. Assembly plants in Hai Phong, Bac Ninh, and Dong Nai run strict torque audits on finished vehicles. Therefore, quality teams use Follow-up dial wrenches to read and log the peak value on each joint.
• Heavy equipment maintenance. Excavators, cranes, and mining trucks use large bolts on tracks, booms, and drive parts. For this reason, contractors in Vietnam choose high-range models with 3/4, 1, or 1-1/2 inch drives.
• Energy and power plants. Power plants, wind farms, and substations need controlled torque on flanges, couplings, and switchgear bolts. Meanwhile, maintenance crews value a mechanical dial that stays easy to read in the field.
• Electronics manufacturing. FDI electronics plants in Bac Ninh, Hai Phong, and Thai Nguyen fasten small housings, heat sinks, and fixtures. So low-range models from 5 to 20 N·m give them clear readings for line checks.
• Factory maintenance. Plants in Binh Duong and Dong Nai maintain pumps, motors, and gearboxes with bolts from 60 to 500 N·m. In addition, a dial wrench gives a clear value that teams can record for ISO audits.

Dial torque wrench TESI20LC compared with similar brands

Before you buy, compare the dial torque wrench TESI20LC with other ways to measure torque on a joint. However, the right choice depends on the job. Instead of one best tool, look at reading style, range, records, and local service in Vietnam.

Dial wrenches shine in audits, process trials, and left-hand thread work. Meanwhile, click wrenches stay faster for repeat tightening on a line. Pick the tool that matches the task first, then confirm current specs with each maker. Specifications change over time, so confirm current data with each maker before you decide.

Choosing the right model

• Pick a range that puts your target torque between 20% and 100% of full scale. That is the band where Snap-on guarantees ±2% accuracy.
• Match the square drive to your sockets and the load. Small models use 1/4 or 3/8 inch drives, while high-range models use 3/4 to 1-1/2 inch.
• Choose Basic for live readings, Follow-up for peak capture, and Light Signal for a visual stop cue. For audits, the Follow-up model is usually the best fit.
• Check the tool length against the space around your joints. The largest models reach 80 inches long, so plan room for a full, steady pull.
• Order a part number that ends in C if you need a calibration certificate on delivery. This saves time when your quality system asks for records before first use.
• Note the storage case listed on each product page, such as PB9, PBR5, or PB39. A fitted case protects the dial during transport and humid storage.

For other sizes in the same range, compare TORQOMETER® Newton Meter Follow-up (with Calibration Certificate) – TESI70FUC, TORQOMETER® Newton Meter Basic – TESI2805, TORQOMETER® Newton Meter Basic – TESI1360, TORQOMETER® Newton Meter Light Signal – TESI4000L. Also browse the full Snap-on torque tools shop for handles, testers and adapters.

Care, storage and calibration

• Store the wrench in its case, flat and dry, with no load on the dial. Then the needle and measuring beam stay in good shape between jobs.
• Wipe off oil and dust with a dry cloth after each use. Also keep solvents away from the dial face, because they can cloud the clear cover.
• Recalibrate every 12 months or 5,000 cycles, as ISO 6789-1:2017 recommends, or sooner after a drop. We can arrange recalibration through an accredited laboratory.
• Never pull past full scale or use the wrench to break loose seized bolts. Overload can bend the beam, so send the tool for checks after any overload.
• Carry large models in their cases and support the long tube during transport. In the humid season, add desiccant so the dial and drive stay free of rust.

Frequently asked questions

Request a quote

Send us the part number, quantity and delivery site, and we will reply with a quote. You can request a quote online or call 0902 327 669.