Description
Reach stackers, straddle carriers and terminal tractors at Cai Mep and Lach Huyen run around the clock. Their wheel, axle and frame bolts carry heavy loads, so workshop crews need a torque value they can see. The Snap-on TESI500AC Torqometer reads up to 500 N·m on a 3/4 inch square drive. According to its listing, this Basic dial model comes with a calibration certificate.

What a 500 N·m dial covers in a port workshop
Large fleet bolts often sit in the middle of this scale. For instance, the jobs below suit a 3/4 inch dial:
- Wheel nuts and hub bolts on yard tractors and trailers.
- Axle, spring and frame bolts during planned service.
- Spreader and attachment mounting bolts, where the maker’s value falls in range.
- Hydraulic pump and motor mounting bolts.
Of course, the equipment manual always sets the figure. Use the dial to reach it and to audit it, never to guess it.
Snap-on TESI500AC Torqometer size and scale
| Square drive | 3/4 in |
| Range | 500 N·m |
| Increments | 10 N·m |
| Length | 29-7/8 in |
| Width | 3-1/4 in |
| Head depth (without drive) | 1-25/32 in |
| Storage case | PB39 |
These values come from the TESI500A row of catalog CAT1500i, in the Newton Meter Reading/Standard 2% Accuracy table. In that table, a C added to the stock number denotes a certificate of calibration model. As a result, the TESI500AC is the certificate version of the TESI500A.
Plan for a 30 inch pull
At just under 30 inches long, this wrench needs clear swing space. So walk the job first and check that a full, steady stroke fits around the tire or frame rail. Also stand firm on level ground rather than reaching from a ladder. A smooth pull matters, because a jerky one makes the needle harder to read.
Reading 10 N·m marks
Each mark on this dial stands for 10 N·m, so read every target against the nearest mark. Meanwhile, Snap-on states its Standard 2% grade from 20% of full scale to full scale. On this size, then, the useful band runs from 100 N·m up to 500 N·m. Below 100 N·m, pick a smaller Torqometer. Because the grade holds counterclockwise too, the same tool can audit left-hand threads.
Storage between shifts
Salt air and wash-down spray reach every corner of a port workshop. Therefore return the wrench to the PB39 case that Snap-on lists for this size, and keep the case off the floor. Never load it past 500 N·m, and keep a breaker bar for seized nuts. Then plan outside recalibration on a fixed cycle.
Get a Snap-on TESI500AC Torqometer quote
Lost in HCM supplies this wrench and prepares every quote, while SMK Vietnam lists it for them. Request a quote from Lost in HCM with your quantity and site. Alternatively, browse more torque wrenches, read about Torqometer tools at snapon.com, or contact SMK Vietnam.
Fleet workshop FAQ
Can one technician handle a 500 N·m dial wrench?
Yes, for most jobs with enough swing space. Still, brace your stance and slow down as the needle nears the target.
Will the TESI500AC hold a reading after the pull?
No. As a Basic model it has a single needle, so note the value while you pull. For a held reading, look at a Follow-up model.
Does the certificate come with the wrench?
The listing says the TESI500AC ships with a calibration certificate. Lost in HCM can explain what that document covers.
















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