Description
Vietnam’s alumina refineries at Tan Rai in Lam Dong and Nhan Co in Dak Nong turn bauxite into white alumina powder. Their grinding mills, digesters, thickeners and calciners carry heavy rotating loads in caustic, dusty air. So the largest base and drive bolts need a check at each planned stop. The Snap-on TESI4000L Torqometer reaches those values with a newton meter dial, and its lamp flashes at the target.

Refinery joints for the Snap-on TESI4000L Torqometer
- Mill drive gearbox and motor base bolts on bauxite grinding mills.
- Drive head mounting bolts on thickener and clarifier rakes.
- Agitator gearbox bolts on digesters and precipitation tanks.
- Large pump base and coupling bolts where the maker gives a value.
However, plant builders set the bolting method, and some joints use tensioners or heated bolts instead. So use the TESI4000L only where the drawing lists a newton meter value.
Catalog row for the TESI4000L
| Item | TESI4000L (CAT1500i p.334) |
|---|---|
| Square drive | 1-1/2 in |
| Range | 4,000 N·m |
| Increments | 100 N·m |
| Length | 140 in |
| Width | 5-1/2 in |
| Head depth | 2-13/16 in |
This row sits in Snap-on’s Newton Meter Reading/Standard 2% Accuracy table in catalog CAT1500i. At this size, the table lists a follow-up TESI4000FU and this signal model, with no basic version and no storage case. The plain TESI4000L in this listing names no certificate. Per the same table, a C at the end of the stock number orders the certificate of calibration model.
A lamp you can see from the handle end
Mill bays are loud, and the crew stands far from the dial on a 140 inch lever. So a fine needle is hard to follow during a long pull. Snap-on’s Signal version answers with a built-in light that flashes once the targeted torque arrives. As a result, the person on the handle and the person at the TESI4000L head both know when to stop.
Start of the TESI4000L accuracy band
Lost in HCM lists the TESI4000L under Newton Meter Reading/Standard 2% Accuracy. By Snap-on’s definition, that grade holds the reading to 2% from one fifth of the scale up to the top. For this wrench, the band therefore begins at 800 N·m. In US terms, 4,000 N·m is about 2,950 ft-lb, while lighter bolts on chutes and covers need a smaller dial.
Moving the Snap-on TESI4000L Torqometer safely
A TESI4000L lever needs two people and a clear path. First, plan the swing arc and lock out the machine. Then pull slowly while a partner steadies the head on the nut. Also rinse off caustic residue and red mud, then dry the wrench before storage. Snap-on warns never to use a Torqometer to break bolts loose, and it calls for periodic recalibration.
Quotes for the Snap-on TESI4000L Torqometer
Alumina producers, mining contractors and plant service firms can source the TESI4000L from Lost in HCM, which supplies the SMK Vietnam Torqometer range. Before the next planned stop, request a quote from Lost in HCM. You can compare sizes in our torque wrenches range, read more at snapon.com, or contact SMK Vietnam.
Refinery crew FAQ for the TESI4000L
How long is the TESI4000L?
Snap-on lists 140 inches, or about 3.6 meters. Plan transport, storage and access around that length.
Is an extension handle in the box?
The catalog row does not tie a handle to this model. Ask Lost in HCM to confirm the box contents before you order.
Why pick the signal model over the follow-up?
The lamp helps when the crew cannot watch the dial. The TESI4000FU instead holds the torque achieved on a second needle.
















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