Thread Gaging & Remediation Units For Integration

In use internationally, for thread verification and thread remediation. The most popular Thread Units in the World!

New Vista RTU Robotic Gaging and Remediation Units and Tool Docking Systems for Thread Gaging, Thread Remediation, and Plain Hole Gaging

For automatic verifying of threaded features in screw machines and CNC lathes

SHOWN: Bank of servo-driven STHs for oil filter application.
“GO” verification (pitch diameter).
“NO GO” verification (pitch diameter).
“NO GO” verification (minor diameter).
Rate: 90 filters per minute.

A standard STH-500 tooled to verify internal threads.

A standard STH Unit system tooled to verify internal threads. The included control system is programmed and ready to integrate (options available for cabinet mounted controls).

A standard STH Unit system tooled to verify external threads. The included control system is programmed and ready to integrate (options available for cabinet mounted controls).

A 3-Spindle Thread-Verification Head supplied for an automated subframe application. The tools pass through clearance holes to verify the threads.

This Multi-spindle Head verifies thirty-nine M6 blind holes simultaneously. Compliant toolholders accommodate X-Y and angular positioning errors. Thread depths are individually set with fingerwheels, and a set of thread depth masters were supplied for this job. The parts here are automotive Cam Covers.

A 2-Spindle Gaging Unit for large threads in a defense application.

A Single-Spindle Unit in use for automotive subframes.

An 8-Spindle Thread-Chasing Head cleaning out paint from M12 internal threads.

A four-spindle Station, in use in a plant in India.

This color display shows the status of each threaded hole in a round pattern of eight holes.

This Multi-Spindle Thread-Verification Unit simultaneously “GO” verifies 57 threads in two engine covers.

This standard-issue, servo-driven RTU is equipped with the Type J Auto-change Chuck, for use in conjunction with the New Vista Type J Tool Docking System.

A New Vista Type J Auto-change Tool Docking System shown, with tools for gaging internal and external threads.

An RTU Unit verifying an M24 Thread in a Crankcase.

This is what is included in a typical RTU shipment to a New Vista customer. The controls componentry you see here is also available cabinet-mounted, with everything wired in.

Here’s a variety of Auto-change and snap-in RTU tooling, for both internal and external threads.

New Vista keeps End Adapters and Side Adapters in stock, for mounting on most of the popular robots.

TVU-SMNP-500-C used in a CNC turning center. This sealed Thread-Verifying Unit mounts on the machine tool’s turret. Air sensing is employed in this TVU so that no electrics need to be run to the turret.

Available in configurations to fit your CNC lathe.

Tool Block Mount
CAT. REF. TVU-SMNP-B
Turret Mount
CAT. REF. TVU-SMNP-S
Turret Mount
CAT. REF. TVU-SMNP-C

MOTORS; VOLTAGES; GEARING

A typical STH callout looks like this: STH-500-SM2-1X-12.7-R

STH is the basic model designation.
500 = an ‘L’ torque unit.
SM2 = Mitsubishi servomotor; D = direct current motor.
1X = direct drive; 4X = 4:1 gear reduction; 7X = 7:1 gear reduction.
7 (or 16) is the output shaft diameter in millimeters.

SPECIFICATIONS AND CAPACITIES FOR STH UNITS

Cycle times shown below are for “typical” thread verification applications, with servo-driven versions, and where the thread lengths are twice the thread diameter. For very short, small diameter threads, cycles down to 0.8 seconds are possible.

The maximum thread lengths that can be gaged are 6mm (1/4”) less than the maximum stroke figures shown. If more stroke is required, order an –ES version.

MODEL SERIES	TORQUE UNIT	WILL VERIFY THREAD SIZES	MAX. STROKE	APPROXIMATE CYCLE TIME
250-SM2-1X-12.5	S	M2 – M5 (#2 thru #10)	32mm (1.25 in.)	1.5 seconds
500-SM2-1X-12.5	L	M5 – M22 (#10 thru 7/8”)	32mm (1.25 in.)	2.0 seconds
2000-SM2-4X-16	XL	M12 – M50 (1/2” thru 2”)	32mm (1.25 in.)	4.0 seconds
2500-SM2-7X-16	XXL	M19 – M64 (3/4” thru 2-1/2”)	32mm (1.25 in.)	6.0 seconds
3000-SM2-7X-16	XXXL	M50 – M100 (2” thru 4”)	38mm (1.50 in.)	7.0 seconds (for M50 size)

Additional dash-number designations:
- Add –FL for flange-mount versions.
- Add –ES suffix for extra stroke versions.
- Add –PD suffix to mount the Programmable Thread Depth Option.
- Add –CMB suffix for “GO / NO GO” (combination gaging) versions. Also for verifying high/low thread pitch diameter limits, as with pipe threads.
Quoted as Options:
- Slide to advance the Unit. For STH foot-mounted versions: a RAM-250 or RAM-350 Slide Unit from New Vista can be employed for this purpose.
- Programmable Thread Depth Option.
- Thread Gage Members, Thread Ring Gages, RemediationTools and Toolholders: Please order separately.

Specifications and Capacities for RTU Units

You can accommodate nearly any thread size between M1 and M75 with any new standard-issue RTU-SM2. Different models for different thread sizes (or different pitches) are no longer necessary. Any RTU-SM2 can now be used to gage or remediate nearly any thread.
With the new tooling for RTUs, torques and rpms are selectable right off the screen.
Specialty tool shanks are no longer a necessity. New tooling options for the new RTU-SM2s accommodate straight shank, taper shank, all-threaded reversible or Type BH tools.
The weight of an RTU with a set of tooling is about 3.6 kg (8 lbs.)
Parts are available for immediate shipment worldwide for all standard-issue RTU-SM2s.

SPECIFICATIONS AND CAPACITIES

Model	Torque Unit	Thread Size	Max Stroke Up To (Approx.)	Cycle Time¹
TVU-SMNP-250-B (S, C)	S	3-5mm (#4 thru #10)	44mm (1.75 in.)	1.0 sec
TVU-SMNP-500-B (S, C)	L	6-25mm (1/4” thru 1”)	50mm (2.00 in.)	1.8 sec
TVU-SMNP-1000-B (S, C)	XL	25-44mm (1” thru 1-3/4”)	57mm (2.25 in.)	2.8 sec
TVU-SMNP-1500-B (S, C)	XXL	44-64mm (1-3/4” thru 2-1/2”)	64mm (2.50 in.)	3.3 sec

¹ Cycle times shown are for situations where the thread length equals the thread diameter. Shorter or longer threads can result in shorter or longer cycles.

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Quickly and automatically verifies or chases threaded holes (or external threads) by powering a suitable tool into (or onto) and out of (or off of) the part. Versions are capable of “GO” gaging, “NO GO” gaging, combination gaging or thread chasing.
Sensitive high speed drive allows the tool to stop in case of missing, short, or improperly formed threads. This creates a “reject” signal.
Spring-biased spindle prevents damage to end of thread at start of engagement.
Will verify blind holes (or male threads) accurately for thread depth (length). Will mount in any orientation.
Will not jam or stick in short or obstructed (reject) threads.
Does not subject the part (or the spindle) to high force or torque levels…even with a reject.
A single STH Unit will work with a variety of threads. No leadscrew is employed.
Proven out for your application before shipping.
Shipped with complete installation instructions. Integration is simple.

Available as single-spindle Units, multiple-spindle Heads or complete Stations.
Used to form, verify or remediate threaded holes (or external threads) by engaging appropriate thread tools with various threaded features.
Will simultaneously form, verify or remediate threads of different sizes and pitches.
Spindles are set individually for different torques and thread depths.
Spindle Units can be equipped with compliant toolholders — to accommodate out-of-position holes.
Not subject to damage from broken taps, missing or displaced holes, etc.
Will not jam or stick in undersize or short threads. Won’t crossthread.
Supplied proven out for your application.

Quickly and automatically verifies or remediates threaded holes (or external threads) by powering a suitable tool into (or onto) and back out of (or off of) the part. Every RTU is capable of “GO” gaging, “NO GO” gaging, combination gaging, thread chasing and plain hole gaging.
Sensitive high speed drive allows the tool to stop in case of missing, short, or improperly formed threads. This creates a “reject” signal.
Spring-biased spindle nose prevents damage to end of thread at start of engagement.
Will verify blind holes (or male threads) accurately for thread depth (length). Will work in any orientation.
Will not crossthread.
Will not jam or stick in short or obstructed (reject) threads.
Does not subject the part (or the spindle) to high force or torque levels.
A single RTU Unit will work with a variety of thread sizes and thread pitches. No leadscrew is employed.
Proven out on a robot for your application before shipping.
Shipped tooled and programmed for your application, with complete integration instructions.

Mounts in a tooling station or tailstock in a CNC lathe or screw machine. Rotary power and advance are provided by the machine tool.
Quickly verifies threaded holes (or external threads) by automatically running a thread gage tool into or (onto) the part. The tool will follow the existing thread.
The TVU-SMNP features a spindle with torque control and axial control, allowing the tool to spin with the part (or retract) in cases where the mouth of the thread is severely distorted. This feature prevents double (out-of-phase) re-threading.
Will verify blind holes accurately to thread depth.
“Locks up” when spindle is reversed, so that the thread gage tool will not stick in (or on) the thread when wrong-size (or short) threads are encountered.
Does not subject the part (or the spindle) to high force or torque levels.