Rod Ends with Stud and Threaded bars Overview springfixlinkages.com Bore diameter of bearing over incl. mm - 6 10 12 12 16 Single plain mean bore diameter variation µm +12 0 +15 0 +18 0 Deviation of a single width of the inner ring µm 0 -150 0 -150 0 -200 Thread, metric measurements: Female thread DIN ISO 965-1 6H Male thread DIN ISO 965-1 6g Static basic load rating CO (kN) The maximal admissible load of our rods ends with stud is specified by the static load rating Co that is indicated in the catalogue. The static load rating Co of a plain bearing corresponds to the static radial load that does not yet cause a lasting deformation at the weakest housing section of the rod end or bearing during standstill at room temperature. In all cases the user has to match the selection criteria with the installation situation and check the suitability of the rod end bearing. In this context the user has to define sufficient security factors and maintenance intervals. Whenever the load is greater than the upper limit of the load rating, please contact us, we may be able to offer an alternative. R3600 Adaptor bolt For use with rod ends R3579 and R3580 R3610, R3613 Female rod ends with stud Maintenance free, suitable for low speeds under high dynamic loads R3611, R3614 Male rod ends with stud Maintenance free. Suitable for low speeds under high dynamic loads R3640-R3642 High Performance version These bearings can be regreased and are suitable for high speeds R3660 – threaded bar right hand and left hand threads R3662 – R3668 linkage bars sizes M6 to M12
13
Embed
Overview - Springfix Linkages · Overview springfixlinkages.com Bore diameter of bearing over incl. mm-6 10 12 12 16 Single plain mean bore diameter variation µm +12 0 +15 0 +18
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
11
Rod Ends with Stud and Threaded barsOverview
springfixlinkages.com
Bore diameter of bearing
overincl. mm -
61012
1216
Single plain mean bore diameter variation
µm+12
0+15
0+18
0
Deviation of a single width of the inner ring
µm0
-1500
-1500
-200
Thread, metric measurements: Female thread DIN ISO 965-1 6HMale thread DIN ISO 965-1 6g
Static basic load rating CO (kN)The maximal admissible load of our rods ends with stud isspecified by the static load rating Co that is indicated inthe catalogue.
The static load rating Co of a plain bearing corresponds to the static radial load that does not yet cause a lastingdeformation at the weakest housing section of the rod end or bearing during standstill at room temperature.
In all cases the user has to match the selection criteriawith the installation situation and check the suitability ofthe rod end bearing. In this context the user has to definesufficient security factors and maintenance intervals.
Whenever the load is greater than the upper limit of theload rating, please contact us, we may be able to offeran alternative.
R3600 Adaptor boltFor use with rod ends R3579 and R3580
R3610, R3613 Female rod ends with stud Maintenance free, suitablefor low speeds under highdynamic loads
R3611, R3614 Male rod ends with studMaintenance free. Suitable for low speeds under high dynamic loads
R3640-R3642 High Performance versionThese bearings can be regreased and are suitable for high speeds
R3660 – threaded bar right hand and left hand threadsR3662 – R3668 linkage bars sizes M6 to M12
7
In many cases heavy-duty rod ends with integrated sphericalplain bearings serve their purpose.They are above all usedfor small swivelling or tilting movements at low speeds.They stand out for their high loadability and can also be usedfor shocklike loads. The rod end ball slides on a plastic bearingshell consisting of a glass fibre-filled nylon/ teflon compound.This design assures an absolutely maintenance-free rod end.
Heavy-duty plain bearing rod ends have a slight initial stressand virtually no clearance. The plastic material used has afavourable secondary advantage in that it absorbs anyforeign particles and encloses them so that no damage canoccur. The joint balls of heavy-duty rod ends with integratedspherical plain bearings are standardly fitted with hardchrome plating. This reliable corrosion protection ensuresthat the function of the rod end will not be affected by acorroded ball surface under humid operating conditions.
Rod ends with integral maintenance-free spherical plain bearings R3550, R3551, R3553, R3554, R3565, R3566
Rod ends with integral self-aligning ball bearingsR3556, R3557, R3559, R3560This design is especially suitable for high speeds, largeswivelling angles or rotating movements with relatively lowor medium loads. Prominent technical features are the lowbearing friction, long-time greasing as well as the sealingagainst rough dirt penetration by means of shields on bothsides. Under normal operating conditions the rod ends aremaintenance-free.
Greasing nipples are provided for lubrication in case of roughoperations and maximum loads. To avoid incompatibility withthe production lubrication, we recommend lubrication witha calcium-complex-soap-grease.
A special heat treatment procedure gives the rod end housinga raceway hardness adapted to the antifriction bearing,ensuring at the same time high stability with changing loads.
Rod ends with integral self-aligning roller bearings R3562, R3563The design based on the structure of a self-aligning rollerbearing is preferably used for high speed, large tilting anglesor rotating movements under high loads. Compared to rodends with self-aligning ball bearings, rod ends with self-aligning roller bearings have essentially higher basic loadratings. This design is equipped with a cage to minimisethe rolling friction and heat build-up. These rod ends withlong-time lubrication are under normal operatingconditions maintenance-free.
Greasing nipples are provided for lubrication in case of roughoperations and maximum loads. To avoid incompatibility withthe production lubrication, we recommend lubricating witha calcium-complex-soap-grease.
Shields on both sides prevent dirt particles from penetratinginto the bearing. The rod ends with self-aligning roller bearingsare, just as the design with the self-aligning ball bearings,subjected to a special heat treatment to obtain a racewayhardness adapted to the antifriction bearings, ensuring atthe same time a high stability with changing loads.
Basic load ratingsStatic basic load rating of anti-friction bearing rod endsThe static basic load rating Co of anantifriction bearing rod end correspondsto that of a static radial load causinga lasting overall deformation of1/10,000 of the roller body diameterat the contact point most highlystressed between roller body andraceway.
Static basic load ratings of plainbearing rod endsThe static basic load rating Co of aplain bearing rod end corresponds tothat of static radial load that does not
yet cause a lasting deformation at theweakest housing section. It contains atleast a 1,2 fold security compared tothe yield stress of the material usedfor the rod end housing.
Dynamic basic load rating ofantifriction bearing rod endsThe dynamic basic load rating C of an antifriction bearing rod end is theexternal radial load, unchangeable insize and direction, at which 90% of alarge quantity of obviously identicalrod ends will reach or exceed 1 millionof rotations or swivelling movements.
Dynamic basic load ratings ofplain bearing rod endsThe dynamic basic load rating C is the parameter for the calculation ofdynamically loaded maintenance-freeheavy-duty rod ends with integratedspherical plain bearing, in other words,making tilting, swivelling or rotatingmovements under load.
Basic load ratings always depend onthe definitions they are based on. For this reason it is not always possibleto compare basic load rating datasupplied by different manufacturers.
Rod EndsTechnical Data
springfixlinkages.com
8Our linkages, your solution 01483 26 6784
Rod EndsTechnical Data
Operating temperaturesHeavy-duty antifriction bearing rod ends can be used foroperating temperatures between -20°C and +120°C.The temperature range of heavy-duty rod ends with integralspherical plain bearing is between -30°C and +60°C,without affecting the loadability. Higher temperatures willreduce the loadability taken into account for the calculationof the ‘working life’ under the temperature factor C2.
LoadsThe decisive parameters for the selection and calculationof heavy-duty rod ends are size, direction and type of load.
Radial or combinated loadsThe heavy-duty rod ends have beenespecially designed to adopt high radialloads. They can furthermore be usedfor combined loads, the axial load
share of which does not exceed 20% of the correspondingradial load.
Unilaterally acting loadIn this case the load acts only in thesame direction, which means that theload area is always in the same bearing section.
Alternately acting loadIn case of alternating loads, the loadareas facing each other are alternatelyloaded and / or relieved, which meansthat the load changes its direction
constantly by approximately 180°.
Swivelling angleThe swivelling angle is the excursion of the rod end fromone final position to the other. Half the swivelling angle ßis used to calculate the service or ‘working life’.
Angle of tiltThe angle of tilt, also called setting angle, refers to thepossible excursion of the joint ball and/ or the inner ring tothe rod end axis in degrees. The tilting angle a indicated inthe table for the heavy-duty antifriction bearing rod endscorresponds to the maximum possible excursion being limitedby the shields on both sides. It is important that this tiltingangle is not exceeded either during installation or operation,as otherwise the shields may be damaged. As far asheavy-duty plain bearing rod ends are concerned,distinction is made between the tilting angles a1 and a2.
If the excursion is not limited by adjacent components,excursion angle 1 can fully be used without affecting therod end capacity. Tilting angle a2 is the excursion limitwhen connecting a forked component.
Nominal service lifeThe term ‘nominal service life’ is used for heavy-dutyantifriction bearing rod ends and represents the number ofswivelling motions or rotations and/ or the number of servicehours the rod end performs before showing the first signsof material fatigue at the raceway or roller bodies. In viewof many influence factors that are difficult or impossible toassess, the service life of several obviously identical bearingsdiffer under the same operating conditions. For this reason,the following method for the service life determination ofheavy-duty antifriction rod ends results in a nominal servicelife being achieved or exceeded by at least 90% of a largerquantity of identical rod ends.
Working lifeThe term ‘working life’ is used with heavy-duty plain bearingrod ends. It represents the number of swivelling motions orrotations and/ or the number of service hours the heavy-duty plain bearing rod end performs before becomingunserviceable because of material fatigue, wear, increasedbearing clearance or increase of the bearing friction moment.The ‘working life’ is not only influenced by the size and thetype of load, it is also affected by a number of factors, whichare partially difficult to assess. A calculation of the exactservice life is therefore impossible. Field-experienced standardvalues for the approximate ‘working life’ can neverthelessbe determined by using the following calculation procedurewhich is based on numerous results from endurance testruns and values from decades of experience. The valuesdetermined by this formula are achieved, if not exceeded,by the majority of the heavy-duty rod ends.
Dimension and tolerance symbolsd1 = nominal bore diameter of the inner
ring or joint ball.
d1mp = mean bore diameter deviation in one pane, arithmetical mean of the largest and smallest bore diameter.
Vd1p = bore diameter variation in one plane, difference between the largest and smallest bore diameter.
Vd1mp = mean bore diameter variation, difference between the largest and smallest bore diameter of one innerring or joint ball.
b1s = single inner ring or joint ball width deviation.
h, h1, h2 = single length from inner ring or ball bore centre to shank end.
hs, h1s, h2s = single length variation of a single rod end.
Low cost rod endsThe ultimate load capacity is based upon the minimummechanical properties of the design configuration in thestressed area.
The ultimate radial static load capacity in the rod endspecification is defined as a single cycle, unidirectionalapplied load will cause ultimate failure.
Operating loads should be based on the static load ratings,incorporating appropriate safety factors to suit theapplication.
When a rod end is to be applied in full rotation, up to amaximum of 100 RPM, the operating loads should notexceed 10% of the ultimate radial static load.
Rod EndsTechnical Data/Tolerances
springfixlinkages.com
d1 d1mptolerance limit Vd1p Vd1mp
b1stolerance limit
hs, h1s, h2stolerance limit
over icl. upper lower max. max. upper lower upper lower
6 +0,012 0 0,012 0,009 0 -0,12 +0,8 -1,2
6 10 +0,015 0 0,015 0,011 0 -0,12 +0,8 -1,2
10 18 +0,018 0 0,018 0,014 0 -0,12 +1,0 -1,7
18 30 +0,021 0 0,021 0,016 0 -0,12 +1,4 -2,1
30 50 +0,025 0 0,025 0,019 0 -0,12 +1,8 -2,7
d1 d1mptolerance limit Vd1p Vd1mp
b1stolerance limit
hs, h1s, h2stolerance limit
over icl. upper lower max. max. upper lower upper lower
10 +0,002 -0,010 0,008 0,006 0 -0,12 +0,8 -1,2
10 18 +0,003 -0,011 0,008 0,006 0 -0,12 +0,8 -1,2
18 30 +0,003 -0,013 0,010 0,008 0 -0,12 +1,0 -1,7
30 50 +0,003 -0,015 0,012 0,009 0 -0,12 +1,4 -2,1
50 80 +0,004 -0,019 0,015 0,011 0 -0,15 +1,8 -2,7
10Our linkages, your solution 01483 26 6784
Plastic Rod EndsTechnical Data
LoadThe load capacity of the maintenance free bearing elementparts is very high at normal ambient temperatures. Thesebearings absorb high forces and weigh only one fifth oftraditional, metal bearing housings. The excellent dampeningproperties are based on the fact that the polymer materialof the two part bearing can absorb vibrations differentlythan steel.
However, plastic specific properties, such as dependenceon temperature and behaviour under long term stress mustbe taken into consideration when using these bearings.The load capacity of the rod end bearing should thereforebe checked in a practical test, particularly if it will be usedunder continuous high loads and at elevated temperatures.
Chemical resistanceThe moisture absorbtion is approximately 1.3% of weight instandard atmosphere. The saturation limit in water is 6.5%.This must be taken into account for these types of applications.The housing made of igumid G is resistant to weak alkalines,acids and fuels, as well as all types of lubricants.
Coefficients of sliding friction and speedOne important advantage of plastic spherical bearings isthat rapid, rotary movements of a mounted shaft take placedirectly in the spherical portion. In metallic rod ends, rotarymotion takes place between the race and the sphericalbearing. High speeds can be achieved with plastic bearings.
These bearings are used in such a way that the angularmovements of the spherical bearings take place at the outerdiameter. By contrast, rotations of the shaft are supporteddirectly in the I.D. of the spherical portion. The advantagetherefore lies in the polymer vs. steel relationship. Polymerproduces lower friction and permits high speeds, even whenrunning dry.
UV resistanceThe corrosion resistance of these bearings gives themspecial value for outside applications. They are permanentlyresistant to UV radiation. A small change in colour (darkcolouration) of the spherical ball due to UV radiation doesnot affect the mechanical electrical or thermal properties.
Radiation resistanceSelf aligning plain bearings are resistant to radiation up toan intensity of 3 x 102 Gy.
Application temperaturesThese bearings can be used in temperatures from -30°C to+ 80°C. The table below shows the effect of temperatureon the load capacity of the bearings.
Medium Resistance
Alcohol + to 0
Hydro carbons +
Greases, oils without additives +
Fuels +
Diluted acids 0 to -
Strong acids -
Diluted alkalines +
Strong alkalines 0
Chemical resistance of plain bearings
+ resistant 0 conditionally resistant - not resistantAll data given at room temperature (20°C)