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Copyright information © 1999–2001, 2005, 2008 MTS Systems Corporation. All rights reserved. Trademark information MTS is a registered trademark and of MTS Systems Corporation within the United States. This trademark may be protected in other countries. Advantage is a trademark of MTS Systems Corporation within the United States. This trademark may be protected in other countries. Molykote is a registered trademark of Dow Chemical Corporation. Scotch-Brite is a trademark of 3M.
Contents Technical Support 5 How to Get Technical Support 5 Before You Contact MTS 5 If You Contact MTS by Phone 7 Problem Submittal Form in MTS Manuals 8 Preface 9 Before You Begin 9 Conventions 10 Documentation Conventions 10 Introduction 13 MTS Advantage Screw Action Grips Functional Description 13 MTS Advantage Screw Action Grips Specifications 15 Installation 17 Install Grips on Servohydraulic Systems 17 Install Grips on Electromechanical Systems 19 MTS Advantage™ Screw Action Grips 3
Operation 21 About Selecting Face Surfaces 22 Grip Faces for 100 N (22.
Technical Support How to Get Technical Support Start with your manuals The manuals supplied by MTS provide most of the information you need to use and maintain your equipment. If your equipment includes MTS software, look for online help and README files that contain additional product information. If you cannot find answers to your technical questions from these sources, you can use the internet, e-mail, telephone, or fax to contact MTS for assistance.
Example site number: 571167 When you have more than one MTS system, the system job number identifies which system you are calling about. You can find your job number in the papers sent to you when you ordered your system. Example system number: US1.42460 Know information from prior technical assistance Identify the problem Know relevant computer information 6 Technical Support If you have contacted MTS about this problem before, we can recall your file.
Know relevant software information For software application problems, have the following information available: • The software application’s name, version number, build number, and if available, software patch number. This information is displayed briefly when you launch the application, and can typically be found in the “About” selection in the “Help” menu.
• Write down relevant information After you call If you are not familiar with all aspects of the equipment operation, have an experienced user nearby to assist you. Prepare yourself in case we need to call you back: • Remember to ask for the notification number. • Record the name of the person who helped you. • Write down any specific instructions to be followed, such as data recording or performance monitoring.
Preface Before You Begin Safety first! Other MTS manuals Before you attempt to use your MTS product or system, read and understand the Safety manual and any other safety information provided with your system. Improper installation, operation, or maintenance of MTS equipment in your test facility can result in hazardous conditions that can cause severe personal injury or death and damage to your equipment and specimen.
Conventions Conventions Documentation Conventions The following paragraphs describe some of the conventions that are used in your MTS manuals. Hazard conventions As necessary, hazard notices may be embedded in this manual. These notices contain safety information that is specific to the task to be performed. Hazard notices immediately precede the step or procedure that may lead to an associated hazard. Read all hazard notices carefully and follow the directions that are given.
Conventions Illustrations Electronic manual conventions Hypertext links Illustrations appear in this manual to clarify text. It is important for you to be aware that these illustrations are examples only and do not necessarily represent your actual system configuration, test application, or software. This manual is available as an electronic document in the Portable Document File (PDF) format. It can be viewed on any computer that has Adobe Acrobat Reader installed.
Conventions 12 Preface MTS Advantage™ Screw Action Grips
Introduction The MTS Advantage Screw Action Grips hold a test specimen in a load unit for static tension testing. The grips can only accommodate flat-surfaced specimens. Contents MTS Advantage Screw Action Grips Functional Description MTS Advantage Screw Action Grips Specifications What you need to know 13 15 MTS Systems Corporation assumes that you know how to use your controller. See the appropriate manual for information about performing any controller-related step in this manual’s procedure.
The grips have serrated knobs that are used to manually apply an initial gripping force on the specimen. For grips rated above 100 N (25 lbf), once the specimen is hand tightened into the grips, a torque wrench is used to ensure there is adequate clamping. The torque wrench also compresses a compliant compression puck to ensure the face surfaces follow specimen deformation during elongation. The tensile load pulls the face surfaces, forcing them to pivot around a pin.
Grip faces Six types of face surfaces are available for use with these grips: • Corrugated for gripping smooth specimens • Serrated for gripping soft material • Rubber coated for extra gripping protection for thin specimens • Diamond tipped for more aggressive gripping needs • Grab test for gripping fabric specimens • Line contact for gripping rubber, latex, and cable sheath MTS Advantage Screw Action Grips Specifications The following tables list the specifications for the MTS Advantage Screw
SIZE SOCKET HEAD CAP SCREW* PART NUMBER 15 mm M6 x 1 055-425-901 30 mm M12 x 1.25 055-425-701 45 mm M12 x 1.25 055-426-001 5/8 in M6 x 1 055-425-801 1-1/4 in M6 x 1 100-021-398 1-1/4 in M12 x 1.25 055-425-601 * Each grip order includes two socket head cap screws for grip installation. The optional pin adapters listed require the use of these screws.
Installation This section discusses the installation of the MTS Advantage Screw Action Grips. Two procedures are provided for installing the grips: Contents • One for servohydraulic applications • One for electromechanical applications Install Grips on Servohydraulic Systems 17 Install Grips on Electromechanical Systems 19 Install Grips on Servohydraulic Systems Follow the steps outlined in the next several pages to install the grip on your test system.
Force Transducer Socket Head Cap Screw Socket Head Cap Screw m Advantage m Advantage Screw Action Grip Screw Action Grip Actuator 1. Position the crosshead and actuator. A. Switch on electrical power at your test controller. B. Apply high hydraulic pressure to the load unit. C. Position the crosshead and actuator for easy bend fixture installation. D. Make sure the crosshead is locked. E. Turn off hydraulic pressure. 2. Prepare the mounting hardware.
. Clean and Lubricate A. Inspect the actuator and force transducer threads. Clean and then lightly lubricate them with Molykote G-n paste or silicon grease supplied with the grip assembly. B. Repeat Step A with the mounting screws. WARNING Installing the grip puts your hands in a crush zone. Your fingers and hands could get crushed. Ensure that you have locked the crosshead, and that you have removed hydraulic pressure from the load unit. 3. Install the grip.
3. Insert the adapter into the load unit component (force transducer attachment fixture, lower mounting fixture, and so forth). Align the holes in the adapter and the load unit component and insert the pin. 4. Preload this connection by tightening the locknut bearing on the adapter against the surface of the load unit component. Tighten sufficiently to ensure that there is no slack during testing. 5.
Operation Grip operation consists of selecting and changing face surfaces, selecting and changing pucks, and specimen installation. Contents About Selecting Face Surfaces 22 Grip Faces for 100 N (22.
About Selecting Face Surfaces A face is a type of surface attachment for the MTS Advantage Screw Action grips. There are a variety of surface coatings for the grips from which you can choose in order to test a variety of specimens. The following tables will help you determine which face is suitable for a specific test. Face Surface Usage Guidelines FACE SURFACE USAGE Corrugated Used for gripping smooth specimens such as textile, fabrics, tissue, leather, and other smooth materials.
Grip Faces for 100 N (22.5 lbf) and 2000 N (450 lbf) Grips The faces for the 100 N (22.5 lbf) and the 2000 N (450 lbf) Advantage Screw Action Grips are compatible and the same as the ones used on MTS Pneumatic Grips. The 25 x 25 mm (1.0 x 1.0 in) size is preferred for the 100 N grip; the 38 x 58 mm (1.5 x 2.28 in) size is preferred for the 2000 N grip. 12.5 mm x 25 mm (0.5 in x 1 in) FACE SURFACE PART NUMBER OBSOLETE P/N* Rubber (smooth-EPDM)† 056-163-825 38.
25 mm x 75 mm (1 in x 3 in) FACE SURFACE PART NUMBER OBSOLETE P/N* Smooth 056-163-809 none Corrugated 056-163-810 none Serrated 056-163-811 none Diamond Tip 056-163-812 38.00581 Rubber (matte)† 056-163-813 none Rubber (corrugated)† 056-163-814 none Rubber (smooth-EPDM)† 056-163-815 38.00425 * Obsolete part numbers are associated with older grips. Current part numbers are direct replacements. † Rubber grip faces are for use only at room temperature. 25 mm x 150 mm (1 in x 5.
38 mm x 58 mm (1.5 in x 2.3 in) FACE SURFACE PART NUMBER OBSOLETE P/N* Smooth 056-163-816 38.00601 Corrugated 056-163-817 38.00602 Serrated 056-163-818 38.00603 Diamond Tip 056-163-819 38.00604 Rubber (matte)† 056-163-820 none Rubber (corrugated)† 056-163-821 none Rubber (smooth-EPDM)† 056-163-822 38.00409 Line Contact (r=4.75mm) 056-163-823 none Line Contact (r=4.75mm) w/Rubber Opposite† 056-163-827 none Grab Test 056-163-824 38.
Grip Faces for 5000 N (1124 lbf) Grips 75 mm x 50 mm (3 in x 2 in) FACE SURFACE PART NUMBER OBSOLETE P/N* Smooth 056-163-901 38.00601 Corrugated 056-163-902 38.00602 Serrated 056-163-903 38.00603 Diamond Tip 056-163-904 38.00604 Rubber (matte)† 056-163-905 none Rubber (corrugated)† 056-163-906 none Rubber (smooth-EPDM)† 056-163-907 38.00605 Line Contact 056-163-908 38.00606 Line Contact w/Rubber Opposite† 056-163-910 none Grab Test 056-163-909 38.
Grip Faces for 10000 N (2250 lbf) Grips 75mm x 50 mm (3 in x 2 in) FACE SURFACE PART NUMBER OBSOLETE P/N* Smooth 056-163-901 38.00601 Corrugated 056-163-902 38.00602 Serrated 056-163-903 38.00603 Diamond Tip 056-163-904 38.00604 Line Contact 056-163-908 38.00606 Grab Test 056-163-909 38.00620 * Obsolete part numbers are associated with older grips. Current part numbers are direct replacements.
How to Change Face Surfaces To change the face surfaces: 1. Remove the face pin. Gently push it out from the opposite side of the pin’s chamfered end. The pin’s chamfered end can be on either side of the grip. 2. Remove the face surfaces from the grips, and slide them straight up through the grooves of the piston cylinder in which they are positioned. 3. Place the new face surfaces into the grooves and insert the pin from the opposite side of the chamfered end. Then push the pin in until flush.
How to Select Pucks There are two types of puck selection: • Nonfixed (both knobs are adjusted for specimen installation and the same type of puck is used on both sides of the grip) • Fixed (only one knob, either the left or right, is adjusted for specimen installation and an aluminum puck is used on the fixed side) Use the nonfixed configuration for extra follow-through action.
Clamp Area Calculation SI METRIC U.S. CUSTOMARY 2 A ( mm ) = H ( mm ) × W ( mm ) 2 A ( in ) = H ( in ) × W ( in ) Specimen’s Clamp Stiffness Calculation SI METRIC U.S.
Puck Selection Guidelines Use the following charts to help determine the proper puck for your particular testing situation. All data was gathered in a nonfixed configuration. 100 N Screw Action Grip Applied Clamp Load from Various Pucks (SI Metric) 2500 Clamp Load (N) 2000 1500 Soft Silicon Nylon Aluminum Hard Silicon 1000 500 0 0.00 0.50 1.00 1.50 2.00 2.50 Torque (N-m) 100 N Screw Action Grip Applied Clamp Load from Various Pucks (U.S.
2000 N Screw Action Grip Applied Clamp Load from Various Pucks (SI Metric) 7000 6000 Clamp Load (N) 5000 Aluminum Hard Silicon Soft Silicon Nylon 4000 3000 2000 1000 0 0 5 10 15 20 25 Torque (N-m) 2000 N Screw Action Grip Applied Clamp Load from Various Pucks (U.S.
5000 N Screw Action Grip Applied Clamp Load from Various Pucks (SI Metric) 16000 14000 Clamp Force (N) 12000 10000 Aluminum Soft Silicon Hard Silicon Nylon 8000 6000 4000 2000 0 0 5 10 15 20 25 30 Torque (N-m) 5000 N Screw Action Grip Applied Clamp Load from Various Pucks (U.S.
For each test, match the grip and puck stiffness to the specimen’s stiffness. Use the following tables to determine which puck is to be used for your test specimen. Use the nonfixed puck selections if both faces are adjusted for specimen installation and the same type of puck is used on both sides of the grip). Use the fixed puck selections if only one face, either the left or right, is adjusted for specimen installation and an aluminum puck is used on the fixed side.
TYPICAL SPECIMEN STIFFNESS N/M SPECIMEN STIFFNESS LBF/IN AT LEAST BUT LESS THAN AT LEAST BUT LESS THAN Delicate 77,100 586,700 440 3,350 Soft silicon Soft plastic 586,700 27,475,500 3,350 156,890 Hard silicon Hard plastic 27,475,500 46,569,500 156,890 265,920 Nylon Aluminum 46,569,500 and greater 265,920 and greater Aluminum Delicate 23,323,300 23,579,900 133,180 134,640 Soft silicon Soft plastic 23,579,900 37,023,400 134,640 211,410 Hard silicon Hard plastic 37,0
How to Change Pucks To change the compression pucks: 1. A puck can be inserted into the right side of the grips or on the left side. When changing the puck, use one hand and hold the face against the housing with light pressure. While holding the face against the housing, unscrew the appropriate piston screw. 2. Remove the piston screw. 3. Use the MTS-supplied puck removal tool to remove the puck. Stick the puck removal tool into the puck. Pull the puck down gently and then pull the puck out. 4.
How to Install a Specimen—Servohydraulic Systems The following procedure describes the steps for the initial setup and specimen loading procedures for MTS Advantage Screw Action Grips that are installed into a servohydraulic test system. This procedure assumes that the proper set of face surfaces has been selected and properly installed for the specimen being tested. WARNING Placing hands in the crush zone between the grips while hydraulic pressure is being applied is dangerous.
3. Place and then center the specimen between the grip faces. Turn the grip knob until the specimen is firmly secured in place. See the following table for the maximum grip knob torque rating. 4. Adjust the actuator until the specimen is properly positioned in the other grip. Turn the grip knobs until the specimen is firmly secured into place. See the following table for the maximum grip knob torque rating.
CAUTION Improper specimen installation can damage the grips or the specimen. To prevent damage to the grips or specimen, install the specimen precisely as specified in this procedure. 3. Place and then center the specimen between the grip faces. Turn the grip knob until the specimen is firmly secured in place. See the following table for the maximum grip knob torque rating. 4. Adjust the crosshead until the specimen is properly positioned in the other grip.
Operation MTS Advantage™ Screw Action Grips
Maintenance This section provides information on the MTS Advantage Screw Action Grip lubrication, general maintenance, and replacement parts. General Maintenance Lubrication Cleaning After approximately 500 uses or weekly, whichever comes first, remove the grips and apply a lubricant to the piston screw’s threaded barrels and to the surface of the puck face. Periodically check the face surfaces for debris buildup. Clean them if necessary.
MTS Advantage Screw Action Wedge Grip Service Kits Service kits are provided that include lubricant, O-rings, and other parts for continued operation of the grips.
Advantage Screw Action Grips Replacement Parts Face Surface (see face surface selection guide) Dowel Pin H W L Piston Cylinder Face Pin O-ring (O-ring is on the chamfered side; remove by pushing from opposite side.
PART NUMBER PART 100 N (25 LBF) 2000 N (450 LBF) 5000 N (1125 LBF) 10,000 N (2250 LBF) Grip assembly 054-950-701 054-950-801 054-950-901 100-030-185 Face pin 054-951-202 054951201 054-952-401 054-952-401 Housing 054-585-401 054-585-501 054-585-601 100-030-184 Standoff Indicator Setscrew 054-950-501 054-950-601 011-481-217 054-950-502 054-950-601 011-481-217 054-950-503 054-950-601 011-481-217 054-950-503 054-950-601 011-481-217 054-951-601 054-951-603 054-951-701 054-951-702 054-95
m MTS Systems Corporation 14000 Technology Drive Eden Prairie, Minnesota 55344-2290 USA Toll Free Phone: 800-328-2255 (within the U.S. or Canada) Phone: 952-937-4000 (outside the U.S. or Canada) Fax: 952-937-4515 E-mail: info@mts.com Internet: www.mts.
