Product Overview
Tactic Model 140 Miniature Manipulator for UHF-Threaded Ultrasonic NDT Transducers
Condition
Used and in good cosmetic shape, with the scuffs, scratches and minor wear you expect from an instrument that spent its working life in an inspection kit. In the photos the black-finished body shows light scratches and machining marks across the flats, and the nameplate still reads clearly: Tactic, TRENTON N.J., MODEL 140, with a stamped number in the serial box. The engraved angulation scale reads 48 24 0 24 48 beside the printed note 6° 1 DIV. The brass micrometer drum is tarnished and lightly scratched but its graduations and red index numbers are legible, all of the knurled locking thumbscrews are present, and the worm and gear teeth look clean and unrounded in the close-up views. Looking straight into the mount tube, the coaxial center contact and its insulator are in place, with some dark residue in the bore. The UHF socket shows its center contact and tan insulator intact.
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Product Overview
The Model 140 is a precision miniature manipulator for ultrasonic nondestructive testing, built by Tactic of Trenton, New Jersey, whose name is still on the plate affixed to the black-finished body. It clamps onto a standard ¾″ search tube and accepts a standard UHF-threaded transducer case, then lets the inspector set a beam angle and lock it instead of holding it by hand. A worm and gear drive swings the transducer through ±54° of single-plane angulation against the engraved scale, which is marked 48 24 0 24 48 and labeled 6° 1 DIV., so one division equals six degrees. Used with compatible equipment such as the Model 45-9, the setup adds ±90° of rotation. The control system is lockable and calibrated, which is the whole point: a repeatable angle, held between indications. Listed elsewhere as Tactic 140, Model 140 manipulator, or an NDT transducer holder.
Key Features
- Manufacturer marking: Tactic, Trenton N.J., on the nameplate
- Model: 140
- Mounts to standard ¾″ search tubes
- Accepts standard UHF-threaded transducer cases
- ±54° single-plane angulation
- Engraved scale marked 48 24 0 24 48, printed 6° 1 DIV. (six degrees per division)
- ±90° rotation with compatible equipment (e.g., Model 45-9)
- Lockable, calibrated control system for stable positioning
- Worm and gear drive with a graduated brass drum and knurled locking thumbscrews
- Black-finished body with bright metal clamp collar and mount post, as photographed
Applications
- Weld inspector holding one refracted angle through a circumferential pipe scan instead of chasing it by hand
- NDT technician running axial and circumferential scans on tubing where every pass has to repeat the same angulation
- Inspection shop keeping an older ¾″ search tube setup in service and needing the angulating head that goes with it
- Training program or calibration bench demonstrating angle beam technique on reference blocks with a positioner that stays put
Frequently Asked Questions
What does the 48 24 0 24 48 scale on the side actually tell me?
It is the angulation scale, engraved on the side plate and printed 6° 1 DIV., so each tick is six degrees and the numbers run out to 48 on both sides of zero. The specification for the 140 is ±54° of single-plane angulation, one division past the last engraved number. You set the angle on the worm drive and lock it with the knurled thumbscrew.
Will my transducer thread onto it?
It accepts standard UHF-threaded transducer cases, and the photos show the UHF socket with its center contact and insulator in place. A case using a different thread or a microdot style connection will not mount without an adapter. Not confirmed for any specific transducer model - check the thread on your own case before ordering.
Does the 140 rotate as well as angulate?
The angulation is built in, single plane, ±54°. The ±90° rotation comes from running it with compatible equipment such as a Model 45-9; on its own the 140 is the angulating head. Not confirmed here - we do not have a 45-9 on the bench to demonstrate the pairing, so verify the combination against your own gear.
What exactly comes in the box?
Exactly what the nine photos show: the Tactic Model 140 manipulator with the clamp collar and mount post it is attached to. No transducer, no cable, no search tube, no case, no documentation.
This one is used - what am I really taking on?
You are buying a used mechanical positioner graded on what we can see and photograph, not on a bench run. There is no calibration record, no functional test report, and no transducer here to try it against, so the photos are the spec: read the nameplate, the engraved scale, the drum graduations and the wear on the black finish, and buy on that. What we will say plainly is that in the views shown the body is straight, every knurled thumbscrew is present, the gear teeth are unrounded and nothing is cracked or missing. This one clears our free shipping line on its own, and it leaves the Idaho warehouse the same or next business day.
Tactic put a scale on the side of this thing where one division equals six degrees, from the era when finding a crack in a weld came down to a steady hand and a knob that would hold its setting. Set your angle, lock it down, and send it back out looking for what nobody wants to find.
