Series 249 Swivels Product Information 011-775-600 E l
Copyright information Trademark information © 1985, 1986, 1994, 1999, 2008 MTS Systems Corporation. All rights reserved. MTS is a registered trademark of MTS Systems Corporation within the United States. These trademarks may be protected in other countries. Molykote is a registered trademark of Dow Chemical Corporation. Superbolt is a registered trademark of Steinbock Machinery Corporation. Torquenut is a trademark of Steinbock Machinery Corporation.
Contents Technical Support 5 How to Get Technical Support Before You Contact MTS 5 5 If You Contact MTS by Phone 6 Problem Submittal Form in MTS Manuals 7 Preface 9 Before You Begin Conventions 9 10 Documentation Conventions 10 Introduction 13 Series 249 Rod Swivel Component Identification Series 249 Rod Swivel Functional Description Series 249 Rod Swivel Specifications Model 249.12 Dimensions 18 Model 249.20 Dimensions 19 Model 249.23 Dimensions 20 Model 249.32 Dimensions 21 Model 249.
Maintenance 29 Swivel Bearing Backlash 29 Checking for Swivel Bearing Backlash—Observation Method 29 Checking for Swivel Bearing Backlash—System Response Method Adjusting Backlash 31 Adjusting Models 249.12/.20/.23/.32 Adjusting Models 249.41/.42/.
How to Get Technical Support 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.
If You Contact MTS by Phone Know information from prior technical assistance Identify the problem Know relevant computer information Know relevant software information If you have contacted MTS about this problem before, we can recall your file.
Problem Submittal Form in MTS Manuals If you are calling about an issue that has already been assigned a notification number, please provide that number. You will be assigned a unique notification number about any new issue.
Problem Submittal Form in MTS Manuals 8 Technical Support Series 249 Rod Swivel Product Manual
Before You Begin Preface Before You Begin Safety first! 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.
Documentation Conventions Hypertext links The electronic document has many hypertext links displayed in a blue font. All blue words in the body text, along with all contents entries and index page numbers, are hypertext links. When you click a hypertext link, the application jumps to the corresponding topic.
Documentation Conventions 12 Preface Series 249 Rod Swivel Product Manual
Introduction The MTS Series 249 Swivels allow hydraulic actuators to operate with a degree of movement. Two types of swivels are available, which allow the use of swivels at each end of an actuator. The following figure shows both types of swivels. Contents Series 249 Rod Swivel Component Identification Series 249 Rod Swivel Functional Description Series 249 Rod Swivel Specifications Model 249.12 Dimensions 18 Model 249.20 Dimensions 19 Model 249.23 Dimensions 20 Model 249.
Series 249 Rod Swivel Component Identification Series 249 Rod Swivel Component Identification Clamping Bolt Swivel Eye Eye Insert Retaining Ring Pin Backlash Adjuster Swivel Jaw Spherical Washers Spherical Bearing Series 249 Swivel Components COMPONENT DESCRIPTION Swivel eye Contains the spherical bearings. There are two mounting styles: • The base type has a bolt pattern on the top that is suitable for mounting the base of an actuator to it.
Series 249 Rod Swivel Functional Description Series 249 Rod Swivel Functional Description The Series 249 Swivels are used for testing purposes where swivel movement with minimum backlash is required. They are particularly suited for the demands of closed-loop servohydraulic testing applications. The swivels can be mounted to a linear hydraulic actuator, load cell, or mechanical linkage. A reaction mass, bedplate, or structural component can be attached to a mounted swivel.
Series 249 Rod Swivel Specifications Series 249 Rod Swivel Specifications The following tables list the swivel base and swivel rod end force rating, the weight specifications, and the swivel base and swivel rod end operational specifications. Force Rating and Weight Specifications MODEL FORCE RATING BASE WEIGHT ROD END WEIGHT 249.12 25 kN (5.5 kip) 2.9 kg (6.5 lb) 2.1 kg (4.6 lb) 249.20 70 kN (15 kip) 13 kg (28 lb) 11 kg (24 lb) 249.23 160 kN (35 kip) 30 kg (66 lb) 27 kg (60 lb) 249.
Series 249 Rod Swivel Specifications Tilt Angle Series 249 Rod Swivel Product Manual Swivel Angle Introduction 17
Model 249.12 Dimensions Model 249.12 Dimensions 62.9 mm (2.475 in.) 62.9 mm (2.475 in.) Thread M12 x 125 mm (1/2-20 UNS-2B) Depth 19.0 mm (0.75 in.) 73.0 mm (2.875 in.) 73.0 mm (1.875 in.) 10.3 mm (0.406 in.) diameter 88.9 mm (3.50 in.) 88.9 mm (3.50 in.) Bolt Pattern 10.4 mm (0.41 in.) 79.4 mm (3.125 in.) 47.6 mm (1.875 in.) 24.6 mm (0.97 in.) For Actuator Rod For Actuator Base Footprint 63.6 mm (2.50 in.) 85.8 mm (3.38 in) 10.7 mm (0.422 in.) diameter 63.6 mm (2.50 in.) 83.6 mm (3.
Model 249.20 Dimensions Model 249.20 Dimensions 17.3 mm (0.68 in.) diameter 89.9 mm (3.54 in.) 133.4 mm (5.25 in.) 89.9 mm (3.54 in.) 133.4 mm (5.25 in.) Thread M27 x 2 mm (1-14 UNS-2B) Depth 35.0 mm (1.38 in.) Bolt Pattern If present—used to align the LVDT base. Refer to Actuator Product Manual 15.7 mm (0.62 in.) 121.9 mm (4.80 in.) 104.7 mm (4.12 in.) 76.2 mm (3.00 in.) 76.2 mm (3.00 in.) 38.1 mm (1.50 in.) For Actuator Rod For Actuator Base Footprint 114.3 mm (4.50 in.) 142.7 mm (5.62 in.
Model 249.23 Dimensions Model 249.23 Dimensions 16.8 mm (0.66 in.) diameter 89.9 mm (3.54 in.) 139.7 mm (5.50 in.) 89.9 mm (3.54 in.) 139.7 mm (5.50 in.) Thread M27 x 2mm (1-14 UNS-2B) Depth 50.8 mm (2.00 in.) Bolt Pattern If present–used to align the LVDT base. Refer to Actuator Product Manual 12.7 mm (0.50 in.) 162.0 mm (6.38 in.) 136.7 mm (5.38 in.) 101.6 mm (4.00 in.) 101.6 mm (4.00 in.) 57.2 mm (2.25 in.) For Actuator Rod For Actuator Base Footprint 146.1 mm (5.75 in.) 187.5 mm (7.50 in.
Model 249.32 Dimensions Model 249.32 Dimensions 36.3 mm (1.43 in.) 36.3 mm (1.43 in.) 135.1 mm (5.32 in.) 203.2 mm (8.00 in.) 135.1 mm (5.32 in.) Thread M36 x 2 mm ( 1.5-12 UN-2B) Depth 76.2 mm (3.00 in.) 25.4 mm (1.00 in.) 203.2 mm (8.00 in.) Bolt Pattern If present–used to align the LVDT base. Refer to Actuator Product Manual. 215.9 mm (8.50 in.) 177.8 mm (7.00 in.) 139.7 mm (5.50 in.) 127.0 mm (5.00 in.) For Actuator Rod 23.0 mm (0.91 in.) diameter 139.7 mm (5.50 in.) 127.0 mm (5.00 in.
Model 249.41 Dimensions Model 249.41 Dimensions 71.9 mm (2.832 in.) 24.8 mm (0.975 in.) diameter 71.9 mm (2.832 in.) 104.7 mm (4.121 in.) 104.7 mm (4.121 in.) M52 x 2mm (2-12 UN) Torquenut Bolt Pattern Adapter 320.5 mm (12.62 in.) 406.4 mm (16.00 in.) 152.4 mm (6.00 in.) 152.4 mm (6.00 in.) 109.5 mm (4.31 in.) For Actuator Base For Actuator Rod Footprint 241.3 mm (9.50 in.) 317.5 mm (12.50 in.) 33.65 mm (1.325 in.) 241.3 mm (9.50 in.) 314.5 mm (12.38 in.
Model 249.42 Dimensions Model 249.42 Dimensions 24.4 mm (0.96 in.) diameter 71.9 mm (2.832 in.) 71.9 mm (2.832 in.) Adapter 104.7 mm (4.121 in.) 104.7 mm (4.121 in.) 2–12 Torquenut Bolt Pattern 29.2 mm (1.15 in.) 339.7 mm (13.375 in.) 206.4 mm (8.125 in.) 250.1 mm (9.875 in.) 230.1 mm (9.06 in.) 206.4 mm (8.125 in.) For Actuator Base For Actuator Rod Footprint 279.4 mm (11.00 in.) 355.6 mm (14.00 in.) 34.8 mm (1.37 in.) diameter 279.4 mm (11.00 in.) 346.2 mm (14.34 in.
Model 249.51 Dimensions Model 249.51 Dimensions Thread 1-8 UNC 2B 81.6 mm (3.212 in.) 81.6 mm (3.212 in.) 3–12 Torquenut Adapter 122.1 mm (4.806 in.) 122.1 mm (4.806 in.) Bolt Pattern 412.7 mm (16.25 in.) 304.8 mm (12.00 in.) 213.4 mm 241.3 mm (12.30 in.) (9.50 in.) 241.3 mm (9.50 in.) For Actuator Base For Actuator Rod Footprint 298.4 mm (11.75 in. 406.4 mm (16.00 in.) 43.9 mm (1.73 in.) diameter 298.4 mm (11.75 in. 406.4 m (16.00 in.
Mounting a Swivel Installation This section describes how to install the Series 249 Swivels. Contents Mounting a Swivel 25 Mounting for Angularly Applied Loads Rigid support for swivel mounts 26 The swivel base assembly is not designed to rigidly support an actuator for vertical operation. In general, actuators that require rigid support are equipped with a pedestal base accessory.
Mounting for Angularly Applied Loads Mounting Bolt Tightening Sequence Mounting for Angularly Applied Loads If the swivel mounting surface is not perpendicular to the direction of applied force, it may be necessary to install retaining stops to prevent the swivel from slipping. Slippage can be expected if the operating forces for the angle of load application are exceeded. The following figure shows the position of the retaining stops and the angle of load application.
2 .4 9. 51 24 24 9 9. 41 2 24 9. 3 24 9. 23 24 0 9. 2 24 (degrees of rotation from the vertical 24 9. 12 Mounting for Angularly Applied Loads Angle of Load Application versus Maximum Load at Slip Point Systems that require the swivels to react angularly to applied tensile and compressive loads should also take into account the possibility of backlash between the retaining stops and the swivel jaw. The retaining stops should be mounted in a manner that will eliminate or minimize this backlash.
(degrees of rotation from the vertical) Mounting for Angularly Applied Loads Shear strength of retaining stops Minimum Shear Rating of Retaining Stops 28 Installation Series 249 Rod Swivel Product Manual
Swivel Bearing Backlash Maintenance Contents Swivel Bearing Backlash 29 Checking for Swivel Bearing Backlash—Observation Method 29 Checking for Swivel Bearing Backlash—System Response Method Adjusting Backlash 31 Adjusting Models 249.12/.20/.23/.32 Adjusting Models 249.41/.42/.51 Overview 31 32 33 Maintenance for the Series 249 Swivels consist of periodic checks and, if necessary, adjusting the backlash. The spherical bearing used in the swivels should not be lubricated.
Checking for Swivel Bearing Backlash—Observation the “normal” appearance, sound, and feel of a properly adjusted swivel in case an adjustment becomes necessary in the future. WARNING Never allow any part of your body to get in the path of motion of any hydraulic component or its associated fixturing. Never rely on your reflexes to protect you from unexpected actuator movement. Actuator and associated fixturing movement can injure personnel or damage equipment it comes in contact with.
Checking for Swivel Bearing Backlash—System Checking for Swivel Bearing Backlash—System Response Method When a swivel bearing is too loose, the amount of force measured as the actuator moves from compression to tension can exhibit a small signal discontinuity during the load reversal. The following figure shows this relationship for a system designed to measure small changes in load.
Adjusting Models 249.12/.20/.23/.32 Clamping Torque and Bolt Type CLAMPING TORQUE MODEL BOLT TYPE N·M LBF·FT 249.12 34 25 Hex head bolt 249.20 110 84 Socket head cap screw 249.23 380 280 Socket head cap screw 249.32 920 680 Socket head cap screw 249.41 62 45 Superbolt Torquenut 249.42 62 45 Superbolt Torquenut 249.
Adjusting Models 249.41/.42/.51 loose, the bearing is clamped too tightly and the clamping bolt can fail in fatigue. Find and correct the source of the problem before continuing. 6. Apply hydraulic pressure and check for backlash using the methods described in “Checking for Swivel Bearing Backlash.” Note The increased amount of force that will be required to rotate and tilt the swivel when it is set to an extremely tight backlash adjustment can introduce unwanted forces into the testing system.
Adjusting Models 249.41/.42/.51 CAUTION Do not loosen the jackbolts on the Torquenut without following the instructions in Step 3 of this procedure. Damage to the hardened washer can occur if the jackbolts are not loosened evenly and in the proper sequence. Ensure that the jackbolts are not loosened more than one-eighth turn at a time, and that the proper loosening sequence is followed. 3. Following the sequence shown below, loosen every third jackbolt oneeighth turn at a time.
Adjusting Models 249.41/.42/.51 It will be necessary to torque each jackbolt several times, because the preceding jackbolts will loosen as the subsequent jackbolts are torqued. Using the same method, torque each jackbolt to a final clamping torque of 62 N·m (45 lbf·ft). 9. Apply hydraulic pressure and check for backlash using the methods described in “Checking for Swivel Bearing Backlash.
Adjusting Models 249.41/.42/.
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