MTS Systems

Series 311 High-Force Test Systems

Ultra-stiff, four-column servohydraulic load frames, dynamically rated to deliver loads ranging from 1 to 30 MN. Higher capacity load frames and unique features can be custom engineered to order.

Key Features & Benefits

  • Industry Standard — A proven leader in developing servohydraulic technology
  • Versatile — Dozens of available accessories including bending fixtures, compression platens and high force grips are available to provide a wide range of testing capabilities
  • Accurate/Repeatable Results — Superior frame stiffness and alignment produces accurate results
  • High Performance — Systems can be engineered with higher performance packages to meet any testing requirement

Applications

Test types

BendCompressionDynamic TestingFatigueTensionStiffness and Strength Measurement

Test specimens

ConcreteMaterialsAircraft PanelsWind Turbine Blade Sub-componentsBuilding MaterialsMetalsPiping and TubingRebarChainStructural SteelWire and Cable

Brochures & Datasheets

Technical Specifications

System Geography

1. Optional Tie Bar
2. High-Accuracy Linear Variable Differential Transducer (LVDT)
3. Precision-machined, ultra-stiff columns
4. Optional Hydraulic Crosshead Positioning Cylinders
5. High-Stiffness Crosshead - Integrated Actuator - Integrated Hydraulic Manifold - Close-coupled Accumulators
6. Optional Hose Stand
7. Hydraulic Service Manifold (HSM) - Optional hose stand-mounted - Optional crosshead-mounted (shown) - Optional floor-standing
8. Crosshead Lift/Lock Controls - Optional hose stand-mounted (shown) - Optional floor-standing
9. Optional Hydraulic Grip Supply
10. Load Frame Base Options - Standard T-Slot (shown) - Integrated Strong Floor
11. Precision Force Transducer - Base-mounted (shown) - Actuator-mounted
12. Optional High-Force Accessories - Compression Platens - Hydraulic Wedge Grips (shown) - Bend Fixtures - Custom Fixtures
13. Crosshead Clamping Mechanism
14. High-Performance MTS Actuator - Crosshead-mounted - High-Stiffness - Doubled-ended - Dynamically rated

High Force 311 Specifications

Standard Models Custom Models
Load Frame Specifications Units 311.31 311.32 311.41 311.51 311.61 311.71 311.81 311.91
Dynamic Force Ratings kN 1000 1200 2500 5000 7500 10,000 20,000 30,000
(kip) (220) (265) (550) (1100) (1650) (2200) (4400) (6600)
Standard Dynamic Strokes mm 150, 250 150, 250 150, 300 300 Custom load frame dimensions vary according to customers' specific application requirements. Consult an MTS Applications Engineer for more information.
(in) (6, 10) (6, 10) (6,12) (12)
Column Diameter mm 101.6 101.6 152.4 203.2
(in) (4.00) (4.00) (6.00) (8.00)
Column Spacing ( width ) mm 711.2 711.2 762 1016.0
(in) (28.0) (28.0) (30.0) (40.0)
Column Spacing ( depth ) mm 406.4 406.4 508.0 812.8
(in) (16.0) (16.0) (20.0) (32.0)
Load Frame Height mm 2946-5486 2946-5486 Note 3 4470-8534
(min-max) (in) (116-216) (116-216) Note 3 (176-336)
Specimen and Grip Spacing mm 254-2794 254-2794 Note 2 450-4500
(min-max) (in) (10-110) (10-110) Note 2 (17.8-177)
Base Width ( width ) mm 914.4 914.4 1066.8 1422.4
(in) (36.0) (36.0) (42.0) (56.0)
Base Width (including lifts) mm 1219 1219 1492.5 1903
(in) (48.0) (48.0) (58.8) (75.0)
Base Depth mm 1016 1016 1168.4 1397
(in) (40.0) (40.0) (46.0) (55.0)
Base Height ( from floor ) mm 280.9 280.9 332 450
(in) (11.06) (11.06) (13.06) (17.8)
Hose Stand Spacing ( max ) mm 921 921 2479 2479
(in) (36.3) (36.3) (97.7) (97.7)
Hose Stand Width mm 991 991 991 991
(in) (39.0) (39.0) (39.0) (39.0)
Hose Stand Depth mm 688 688 688 688
(in) (27.1) (27.1) (27.1) (27.1)
Hose Stand Height mm 2426 2426 2819 3200
(in) (95.5) (95.5) (111.0) (126.0)
Approximate Crosshead Weight kg 1225 1225 2903 7938
(lb) (2700) (2700) (6400) (17,500)
Approximate Total Weight kg 4100 4100 9525 21500
(lb) (9100) (9100) (21,000) (47,500)
System Stiffness 4 N/m 1.6 X 10 9 1.6 X 10 9 3.1 X 10 9 3.9 X 10 9
lbf/in 9.3 X 10 6 9.3 X 10 6 17.4 X 10 6 22.6 X 10 6

High Force 311 Specifications

1.Model 311.31 & 311.32 with actuator retracted, 311.41 & 311.51 with actuator at mid-stroke
2.Model 311.41 150 mm stroke is 400 – 3000 mm (15.75 – 118.1 in), 311.41 300 mm stroke is 400 – 3385 (13.31 – 133.3 in)
3.Model 311.41 150 mm stroke is 3554 – 6154 (140.0 – 242.3 in), 311.41 300 mm stroke is 3720 – 6768 (146.5 – 266.5 in)
4.Stiffness calculated at a crosshead height of 2 meters (78.7 inch) above the base.

Specifications are taken from the official MTS product page and may change; please confirm with our team before ordering.

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