Larson Systems Inc.
Manufacturing Expert Spring Testing Solutions Since 1979
The TST is a manually operated torque / angle tester that is available in seven force ranges: 0.3, 3, 25, 100, 200, 500 and 1,300 in-lb.
The TST is a manually operated torque / angle tester that is available in seven force ranges: 0.3, 3, 25, 100, 200, 500 and 1,300 in-lb. The solid steel base and aluminum frame is rugged for durability in many different testing environments. The TST, like all LSI testers, comes standard with an NIST traceable certificate of calibration.
.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
Take the guesswork out of testing with LSI’s revolutionary absolute zeroing technique. Used with custom interchangeable tooling, this technique improves repeatability of setups and results during testing. Parts are then measured against the nominal dimensions according to the drawing or specifications, not to a relative point requiring intuition and guesswork.
Using LSI’s custom interchangeable tooling technique, you can machine tooling blanks to fit your specific applications or send the information to us and we will do the work for you.
With the universal tooling supplied by LSI, you can test many parts with no special fittings. This is great for unique or one-time job runs with a minimum of setup time.
Both custom and universal tooling is designed to be changed in seconds… YES! In just seconds, you can go from one setup to the next, maintaining your repeatability and reproducibility. Setups within ± 0.1°.
Switch from one torque cartridge to another in just minutes, allowing for a single tester to test a wide range of capacities quickly and accurately. Smart torque cartridges can be digitally calibrated. You can also send in only the smart torque cartridge to LSI for remote calibration (full system calibration is better than individual component calibration).
Delicate lower-capacity torque cartridges feature overload-preventing lockout mechanisms
Part sorting using bright LED limit lights for good / bad parts and a statistical summary printout that includes a histogram and data run chart.
This software option lets the user program the limit lights to make sorting reliable and efficient. This option also uses the programmed limits to enable the Mean, Standard Deviation, Range, Range Chart, Histogram, Cp and Cpk statistical printed outputs. Limit Lights and Full Statistics Analysis is a tester software feature. A PC is not needed for this software.
The TST has a built-in mean, standard deviation, range, statistical summary and data logger that can store up to 1,800 test points. It also has automatic deflection compensation, which corrects for torque windup and always displays accurate angle measurements. RS 232 is standard. Soft keys give the user access to digital calibration, linearization and features like user programmable force filter, programmable length offset, user customized print headings, automatic calculation of mean, standard deviation and range of data. Use the RS 232 port for statistical printout or talking to a PC. It works great with LSI’s SSS, a PC-based “Statistical & Spreadsheet Interface Software,” which features dynamic data exchange, allowing you to communicate to spreadsheets like Excel. Measure torque in in-lb, N-mm, gm-mm, kg-m, in-oz, ft-lb, N-m, kg-mm and kg-cm.
Create a more life-like test with optional adjustable compression. The X-Axis Compression Adjuster allows you to apply up to 250 lb of compression force, (based on prior force / length measurements) and gain more accurate readings for your part tests.
Use the optional X-Axis Linear Scale to set compression by length.
.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
Test two points with spring rate calculation in one deflection of the spring.
2 Point With Rate is a tester software option that allows you to calculate the rate (or spring constant) between two points. To use this feature, press the Test Mode button to enter 2 Point With Rate mode. Set your first test point by using the tester’s force and length readings as a guide and pressing the F1 button. Set the second test point using the same method. When both test points are set the tester automatically calculates and displays the rate as shown. This is all accomplished in just one deflection of the spring!
2 Point with Rate is a tester software feature. A PC is not needed for this software.
Two-point testing with automatic free angle calculation. Calculate your torsion springs free angle without measuring by testing two points in one deflection of the spring.
[/col][/row]
For repetitive applications requiring multiple test points on a given spring, the Torsion Spring Tester comes equipped with three stops that can be preset to any given test point.
A self-contained tester with an internal, rechargeable battery pack (approximately 8-10 hours of continuous operation). AC charger also included with each tester.
The TST comes standard with two cranking ratios, giving the operator flexibility when testing. Use the 1:1 ratio for light springs or course movements. Choose the 40:1 micro adjust to fine tune the measurements.
| Load Cell Capacity |
Standard Resolution | |
| 0-20% FS | 20-100% FS | |
| 0.3 in-lb | 0.00002 in-lb | 0.0002 in-lb |
| 3 g-mm | 0.2 g-mm | 2 g-mm |
| 34 N-mm | 0.002 N-mm | 0.02 N-mm |
| 3 in-lb | 0.0002 in-lb | 0.002 in-lb |
| 35 g-mm | 2 g-mm | 20 g-mm |
| 339 N-mm | 0.02 N-mm | 0.2 N-mm |
| 25 in-lb | 0.002 in-lb | 0.02 in-lb |
| 288 kg-mm | 0.02 kg-mm | 0.2 kg-mm |
| 2,825 N-mm | 0.2 N-mm | 2 N-mm |
| 100 in-lb | 0.005 in-lb | 0.05 in-lb |
| 1,152 kg-mm | 0.05 kg-mm | 0.5 kg-mm |
| 11,299 N-mm | 0.5 N-mm | 5 N-mm |
| 200 in-lb | 0.01 in-lb | 0.1 in-lb |
| 2,304 kg-mm | 0.1 kg-mm | 1 kg-mm |
| 22,597 N-mm | 1 N-mm | 10 N-mm |
| 500 in-lb | 0.05 in-lb | 0.5 in-lb |
| 5,761 kg-mm | 0.5 kg-mm | 5 kg-mm |
| 56,493 N-mm | 5 N-mm | 50 N-mm |
| 1,300 in-lb | 0.1 in-lb | 1 in-lb |
| 14,978 kg-mm | 1 kg-mm | 10 kg-mm |
| 146,883 N-mm | 10 N-mm | 100 N-mm |
| Accuracy = ± Full Scale Resolution x 2 | ||
| Description | Part Number | |
|---|---|---|
| TST 1300 - Torsion Spring Tester | 050-0000-0081-00 | Get a Quote |
| Description | Part Number | |
|---|---|---|
| Bed Extension for 24" parts | 025-0000-0669-00 | Get a Quote |
| Bed Extension for 48" parts | 025-0000-0669-01 | Get a Quote |
| X-Axis Compression Adjuster | 025-0000-0725-00 | Get a Quote |
| X-Axis Linear Scale | 025-0000-0730-00 | Get a Quote |
| Description | Part Number | |
|---|---|---|
2 Point With Rate (Torsion)
2 Point with Rate Software OptionPart Number: 050-0000-0072-00 | 050-0000-0072-00 | Get a Quote |
Limit Lights & Full Statistical Analysis
Limit Lights & Full Statistical AnalysisPart Number: 050-0000-0073-00 Limit Lights and Full Statistics Analysis is a tester software feature. A PC is not needed for this software. Sample printouts are examples of testing with limits on an SDHT tester. | 050-0000-0073-00 | Get a Quote |
Calculated Free Angle
Calculated Free AnglePart Number: 050-1000-0040-01 Calculated Free Angle is a tester software feature. A PC is not needed for this software. | 050-1000-0040-01 | Get a Quote |
| Peak Test Mode | 050-0000-0082-00 | Get a Quote |
| Interchangeable Torque Cartridge Capability | 050-0000-0074-00 | Get a Quote |
| Description | Part Number | |
|---|---|---|
| 0.3 in-lb Torque Cartridge with Lockout | 025-0000-0475-00 | Get a Quote |
| 3 in-lb Torque Catridge with Lockout | 025-0000-0475-01 | Get a Quote |
| 25 in-lb Torque Cartridge with Lockout | 025-0000-0475-02 | Get a Quote |
| 100 in-lb Torque Cartridge | 025-0000-0378-05 | Get a Quote |
| 200 in-lb Torque Cartridge | 025-0000-0378-06 | Get a Quote |
| 500 in-lb Torque Cartridge | 025-0000-0378-07 | Get a Quote |
| 1,300 in-lb Torque Cartridge | 025-0000-0378-08 | Get a Quote |
| Description | Part Number | |
|---|---|---|
2" Ø Custom Tooling Blanks (1/4-28 thread)
Custom Tooling BlanksPart Number: 018-0000-1615-01 | 018-0000-1615-01 | Get a Quote |
2" Ø Custom Tooling Blanks (10-32 thread)
Custom Tooling BlanksPart Number: 018-0000-1615-02 | 018-0000-1615-02 | Get a Quote |
3.75" Ø Custom Tooling Blanks (1/4-28 thread)
Custom Tooling BlanksPart Number: 018-0000-1615-00 | 018-0000-1615-00 | Get a Quote |
5" Ø Custom Tooling Blanks (1/4-28 thread)
Custom Tooling BlanksPart Number: 018-0000-1615-03 | 018-0000-1615-03 | Get a Quote |
Universal Tooling Assembly (0.3 to 200 in-lb)
Universal Tooling AssemblyPart Number: 0025-0000-0379-00 | 025-0000-0379-00 | Get a Quote |
Universal Tooling Assembly TST (100 to 1,300 in-lb)
Universal Tooling AssemblyPart Number: 025-0000-0353-00 | 025-0000-0353-00 | Get a Quote |
| Description | Part Number | |
|---|---|---|
Wire Twist Grip Set - 0.028 to 0.250"
Wire Twist Grip SetPart Number: 025-0000-0477-00  | 025-0000-0477-00 | Get a Quote |
Wire Twist Grip Set - 0.078 to 0.500"
Wire Twist Grip SetPart Number: 025-0000-0477-01 | 025-0000-0477-01 | Get a Quote |
Wire Twist Solid Load Cartridge
Wire Twist Grip SetPart Number: 025-0000-0480-00 | 025-0000-0480-00 | Get a Quote |
| Description | Part Number | |
|---|---|---|
| Calibration Core Set (0.3 to 3 in-lb) | 025-0000-0367-00 | Get a Quote |
| Calibration Core Set (25 to 500 in-lb) | 025-0000-0354-00 | Get a Quote |
| Calibration Core Set - 25-1,300 in-lb | 025-0000-0367-03 | Get a Quote |
1.01 lb Calibration Weight Set (0.3 to 3 in-lb)
Calibration WeightsPart Number: 025-0000-0368-01 | 025-0000-0368-01 | Get a Quote |
| 11 lb Calibration Weight Set (25 in-lb) | 025-0000-0368-02 | Get a Quote |
40.5 lb Calibration Weight Set (100 to 500 in-lb)
Calibration WeightsPart Number: 025-0000-0368-03 | 025-0000-0368-03 | Get a Quote |
| 110.5 lb Calibration Weight Set (1,300 in-lb) | 025-0000-0368-04 | Get a Quote |
| Description | Part Number | |
|---|---|---|
| Internal RS 232 Capability | 025-1000-0261-00 | Get a Quote |
RS 232 to Parallel Adapter Cable
RS 232 to Parallel Printer Cable / AdapterPart Number: 025-0000-0458-00 Connect any parallel printer to any RS 232 device. These cables are included with our InkJet Printer. | 025-0000-0458-00 | Get a Quote |
SSS - PC Statistical & Spreadsheet Interface SoftwareTotal Spring InspectionThe SSS software can connect to any LSI manual tester, including the DHT and the TST, and virtually any measuring device that can send data via RS232. The SSS can also accept data from the keyboard. By setting up a specific testing method, you can test your springs reliably and repeatedly and generate one comprehensive report. | 050-0000-0075-00 | Get a Quote |
| Description | Part Number | |
|---|---|---|
| Power Supply - USA (115 VAC) | 025-1000-0396-00 | Get a Quote |
| Power Supply - International (100-240 VAC 50-60 Hz) | 025-1000-0396-04 | Get a Quote |
| Description | Part Number | |
|---|---|---|
Foam Vibration Damping Pad
Foam Vibration Damping PadPart Number: 025-0000-0356-00 | 025-0000-0356-00 | Get a Quote |
Dust Cover
Dust CoverPart Number: 059-1000-0020-00 | 059-1000-0020-00 | Get a Quote |
