Snap-on 390-2-2 Weight Hanger, 4 oz, for TTC Torque Transducer Calibration

Description

Dead-weight checks remain one of the clearest ways to prove that a torque transducer reads true. Known mass hangs at a known radius, and the indicator should show the matching torque. The Snap-on 390-2-2 weight hanger is the smallest link in that chain. Snap-on lists it as a 4 oz hanger for its TTC series transducers.

Where the Snap-on 390-2-2 weight hanger fits

Snap-on states that these hangers and trays serve to calibrate any TTC series transducer. It also describes the trays as certified as to weight. Low-range transducers need the lightest start load, and that is where the 4 oz hanger comes in.

How the hanger works with wheels and arms

The hanger hooks onto a calibration wheel or arm, and weights stack on it. Torque then equals the total hanging weight times the radius. Because the hanger forms part of that load, its own 4 oz counts in every step. For example, Snap-on’s TTC500 2-1/2 in calibration wheel suits very low ranges, up to 50 in-oz. Its No. 1 weight set, the TTC3200, covers all transducers, and Snap-on says those weights are NIST traceable.

Part of the TTCCALKIT

Snap-on also packs the 390-2-2 into its TTCCALKIT calibration kit, where it appears as a 4 oz calibration weight tray. That kit adds calibration wheels, a 40 in arm, a stand kit and heavier trays. So a lab that owns the kit may only need the hanger as a spare. A lab that builds its own set, on the other hand, can order it alone.

Which systems use it

SMK Vietnam lists several TTC products, such as the TTC2000SYS manual system and the TTC2800SYS motorized system. It also lists the TTC610 and TTC810 indicators. The 390-2-2 weight hanger belongs to the same TTC accessory family.

Handling tips for the 390-2-2

Handle the hanger with clean gloves, since oil and dirt add mass. Also hang it gently, because a swing or bounce disturbs the reading. Store it in a closed box between checks. Finally, send it to an outside lab at intervals to check its mass, in line with your quality system.

Order the Snap-on 390-2-2 weight hanger

Lost in HCM supplies Snap-on calibration accessories and prepares quotes, while SMK Vietnam lists them. Please request a quote from Lost in HCM and name your TTC system. Also see torque testers and calibration systems, or contact SMK Vietnam. Snap-on’s main site is snapon.com.

390-2-2 questions

How heavy is the 390-2-2?

Snap-on lists it as a 4 oz weight hanger.

Which transducers does it suit?

Snap-on says its hangers and trays can calibrate any TTC series transducer.

Is it in the TTCCALKIT?

Yes. The kit list includes the 390-2-2 as its 4 oz weight tray.