Description
Glass furnaces, ceramic kilns and steam boilers all fire through burners fed by a gas train. Small screws hold flame scanners, igniters, valve covers and sight glass rings on that hardware. The Snap-on TQSS2.5A torque driver lets a burner tech set those screws to a value rather than by feel. This short Torqometer basic model shows torque on a U.S. dial with one live needle.
Burner service with the Snap-on TQSS2.5A torque driver
A loose scanner bracket can tilt the sensor and trip the burner. On the other hand, an overtight cover screw can crack a casting or crush a gasket. So burner makers often give screw values in their service manuals. With this driver, the tech watches the needle climb and stops at the value. In addition, the stubby body fits behind front plates and inside crowded control boxes.
What the TQSS2.5A basic dial shows
A basic model has one needle that follows the torque in real time. When you let go, it drops back to zero. Therefore you read the Snap-on TQSS2.5A torque driver while you turn, not afterward. That suits a tech who sets screws one by one. By contrast, a follow-up model adds a second needle that stays at the peak.
TQSS2.5A in the U.S. driver table
| Item | TQSS2.5A |
|---|---|
| Model type | Stubby basic (1 needle) |
| Length | 5-1/4 in |
| Range | 480 in-oz / 30 in-lb |
| Increments | 12 in-oz / 1 in-lb |
| Full-length twin | TQS2.5A, 7-3/4 in |
| Case | PB47 storage case |
Catalog CAT1500i gives the values above, and Snap-on’s 2005 reinstatement notice names the TQSS2.5A too. Per the catalog, the drivers in this table carry no certificate unless you add a C to the stock number. Its 2% guarantee runs from 20% of full scale to the top of the dial. So the TQSS2.5A reads best from 6 in-lb to 30 in-lb, about 0.7 to 3.4 N·m.
Care of the TQSS2.5A near hot equipment
Let a burner cool before you work on it, both for your safety and for the tool. Also keep the dial away from radiant heat, which can warp plastic parts. After each job, wipe off soot and oil and store the driver in its PB47 case. Then follow your plant’s calibration cycle.
Get the Snap-on TQSS2.5A torque driver through Lost in HCM
Lost in HCM supplies this driver and quotes every order. For a combustion service kit, request a quote from Lost in HCM. SMK Vietnam lists more torque screwdrivers as well. You can also read the maker’s pages at snapon.com or contact SMK Vietnam.
TQSS2.5A combustion tech FAQ
How do I record a TQSS2.5A value without a peak needle?
Read the dial at the moment the screw reaches the value, then write it down before you release. If you need a held peak, the stubby follow-up TQSS2.5FUA keeps it.
Can the TQSS2.5A check gas train fittings?
It suits small screws on covers, brackets and sensors. Pipe fittings and flange bolts need a torque wrench and the valve maker’s values.
What should I order if QA asks for a certificate?
Per the catalog, adding C orders the certificate version, so ask Lost in HCM about the TQSS2.5AC.
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