Miniature Ball Spline LTS / LT-X

Transcription

1 Miniaure Ball Spline LTS / LTX Compac design (volume comparison: % of convenional THK produc) Sable, smooh moion Corrosion resisan Marensie sainless seel Spline shaf diameer φ, φ, φ, and φ LTS Acual Size LTX Acual Size For deails, visi THK a Produc informaion is updaed regularly on he THK websie. CATALOG No.3E

2 iniauare all Spline Achieves Compac Design, High Rigidiy, and Long Life Miniaure Ball Spline LTS/LTX uses a new circulaion mehod employing end caps and four rows of circular arc grooves (raceways) o enable sable and smooh moion wih a small rolling resisance flucuaion. Compac The new circulaion mehod used in LTS/LTX makes i significanly more compac han THK s convenional LT. Because he LTX nu has he same ouer diameer and lengh as THK linear bushing model LM, he linear bushing can be replaced wih a miniaure ball spline LTX. LTS LTX THK s convenional LT LTX LTX LTX

3 High Rigidiy For a given nu size, an LTX one spline shaf size larger or an LTS wo sizes larger can be used insead of he convenional LT, for significanly improved rigidiy. Smooh Moion (Small Rolling Resisance Flucuaion) The new circulaion mehod used in LTS/LTX achieves more sable and smooher moion han THK s convenional LT. Rigidiy Comparison wih Same Spline Nu Ouer Diameer (φ ) [anθ Gradien angle ].... Gradien angle θ Load posiion Applied momen LT (Convenional THK iem) LTX LTS Iem Speed Lubrican Descripion LT/LTX/LTS mm/s AFF Grease Corrosion Resisan LTS and LTX use marensiic sainless seel for he spline nu, spline shaf, and balls, so i is corrosion resisan and an opimal choice for clean environmens. Resisance value [N]..... Rolling Resisance Flucuaion Grealy Reduced LT (Convenional THK iem) LTX LTS Sroke [mm] LTS LTS LTS LTS

4 iniauare all Spline Achieves a Subsanially More Compac Design. More compac spline nu dimensions for he same shaf diameer. Larger shaf diameer for he same spline nu dimensions. LTX (Comparison wih THK s convenional LT) LTX Spline shaf diameer LT LTX LT LTX THK s convenional LT LTX LT Spline shaf diameer LTX LT LTS (Comparison wih THK s convenional LT) LTS Spline shaf diameer LT LTS LT. 3 LTS THK s convenional LT. 3 LTS LT Spline shaf diameer LTS LT 3

5 Mouning mehod (LTX) When fiing he spline nu and housing ogeher for Miniaure Ball Spline model LTX, i is recommended ha hey be loose fiing o avoid deformaion of he spline nu. Housing Innerdiameer Tolerance General condiions If he accuracy does no need o be very high H H7 Moun Miniaure Ball Spline model LTX using he keyway on he nu (counersunk porion on LTX). Also, he same as wih THK s convenional Linear Bushing, mouning can also be carried ou using a snap ring or sopper plae. Model LTX Housing Mouning wih snap ring and wih sopper plae Snap ring Se screw When mouning model LTX, use M screws wih hread lock, urning so hey lighly conac he nu. To preven deformaion of he spline nu, avoid ighening he screws. Sopper plae Boh ends of Miniaure Ball Spline model LTX s spline nu are resin end caps. Avoid applying excessive loads, as sriking or srongly pushing may damage he caps. When using adhesive, conac THK for deails. Mouning mehod (LTS) The mehod for mouning LTS is he same as described above for LTX, excep for he se screw. Conac THK for deails on how o preven roaion. Accuracy Sandards Table 3 A Table A A Table A B Spline nu B Table B Table 3 B Mouning par Supporing porion Supporing porion Mouning par Table Runou of he Spline Nu Circumference in Relaion o he Suppor of he Spline Shaf Overall spline shaf lengh [mm] Normal grade (No symbol) Runou (MAX) [μm] High accuracy grade (H) or less 7 Above Above 3 Above 3 or less or less or less Precision Grade (P) 7 Perpendiculariy of he Spline Table Shaf End Face in Relaion o he Suppor of he Spline Shaf Perpendiculariy (MAX) [μm] High accuracy Normal grade grade (No symbol) (H) Precision Grade (P) Concenriciy of he Table 3 Parmouning in Relaion o he Suppor of he Spline Shaf Concenriciy (MAX) [μm] High accuracy Normal grade grade (No symbol) (H) Precision Grade (P) 9 33 Clearance in he Roaion Direcion Wih he Ball Spline, he clearance in he roaion direcion is sandardized as he sum of clearances in he circumferenial direcion. Because clearance values are sandardized per each shaf diameer, clearances can be seleced o mach usage condiions. Clearance in he Roaion Direcion Measuremen of Clearance in he Roaional Direcion Table Clearance in he roaion Clearance in he roaion Table direcion for LTS [μm] direcion for LTX [μm] LTS LTS LTS LTS Normal Clearance. o +.. o +.. o +.. o +. Clearance CL. o..3 o.. o.. o. LTX LTX/XL LTX/XL Normal Clearance o + o + o + Clearance CL o o o

6 Dimensional Table for Model LTS L L D b D φ d Uni: mm LTS Spline shaf diameer Dh7 Ouer diameer Lengh D Tolerance L L..9 d H Pin hole. b Basic Load Raing C [N] 33 CO [N] 7 Permissible momen MA. Basic orque raing CT.3 COT. Nu mass [g]. LTS LTS LTS Precauions To Be Taken if an Eccenric Load Is Applied By incorporaing four rows of raceways, LTS offers grealy enhanced performance wih regard o eccenric loads (momen and orque) when compared o THK s convenional Linear Bushing LM. However, under heavy eccenric loads poor operaion or premaure failure may resul. Avoid applying excessive eccenric loads. CT COT MA C CO Maximum Manufacured Lenghs for Model LTS Spline Shaf Maximum Manufacured Lenghs for Model LTS Spline Shaf LTS LTS LTS LTS Shaf diameer Dh7 Mass [g/m] Maximum manufacured lenghs [mm] Normal grade (No symbol) High accuracy grade (H) Precision grade (P) 3 Maerial: equivalen o SUSC Hardness: o HRC Model number coding LTS CL +L H Symbol for clearance in he roaional direcion Number of spline nus on one shaf (no symbol for one nu) Accuracy symbol Overall spline shaf lengh (in mm) Also available are producs wih a specified clearance beween spline shaf and spline nu, preload producs ( or less clearance), inclusion of specified grease (comes sandard wih THKAFF grease fed and anirus oil applied), and consideraions such as surface reamen (THK APC reamen, THK APCF reamen, THK APHC reamen). Conac THK for deails.

7 Dimensional Table for Model LTX counersunk LTX b LTX/LTXL LTX/LTXL L L d D D Uni: mm LTX Spline shaf diameer Dh7 Ouer diameer Lengh D Tolerance L L.9. (.) 7. b H Keyway Greasing hole d Basic Load Raing C [N] CO [N] 7 Permissible momen MA. Basic orque raing CT.9 COT. Mass [g]. LTX LTXL.9 (3.) (.) LTX LTXL. 9 (7.) 3 (.) : Spline nu lengh L is lengh wih conaminaion proecion accessory UU mouned. Values in ( ) are appropriae dimensions wihou conaminaion proecion accessory UU. Precauions To Be Taken if an Eccenric Load Is Applied By incorporaing four rows of raceways, LTX offers grealy enhanced performance wih regard o eccenric loads (momen and orque) when compared o THK s convenional Linear Bushing LM. However, under heavy eccenric loads poor operaion or premaure failure may resul. Avoid applying excessive eccenric loads. CT COT MA C CO Maximum Manufacured Lenghs for Model LTX Spline Shaf Maximum Manufacured Lenghs for Model LTX Spline Shaf Shaf diameer Dh7 Mass [g/m] Maximum manufacured lenghs [mm] Normal grade (No symbol) High accuracy grade (H) Precision grade (P) LTX LTX/XL LTX/XL 9 3 Maerial: equivalen o SUSC Hardness: o HRC Model number coding LTX UU CL +L H Conaminaion proecion accessory symbol Number of spline nus on one shaf (no symbol for one nu) Symbol for clearance in he roaional direcion Accuracy symbol Overall spline shaf lengh (in mm) Also available are producs wih a specified clearance beween spline shaf and spline nu, preload producs ( or less clearance), inclusion of specified grease (comes sandard wih THKAFF grease fed and anirus oil applied), and consideraions such as surface reamen (THK APC reamen, THK APCF reamen, THK APHC reamen). Conac THK for deails.

8 Miniaure Ball Spline LTS/LTX Precauions on use The Spline Nu and he Spline Shaf Do no remove he spline nu from he spline shaf unless i is necessary. If reinsalling he spline nu ono he spline shaf afer ineviably removing he nu, align he ball posiion in he spline nu wih he groove posiion of he spline shaf, and gradually inser he spline shaf sraigh ino he spline nu. If he spline shaf is iled when i is insered, balls may fall ou or he circulaion par may be damaged. If he spline shaf ges suck halfway while being insered ino he nu, do no force he shaf ino he nu, bu pull i ou once,recheck he ball posiion and he groove posiion of he spline shaf, hen gradually inser he shaf sraigh ino he nu. Afer insering he spline shaf ino he spline nu, check wheher he spline nu or he spline shaf smoohly moves. If he spline shaf was forcibly insered, funcional loss may have occurred even if he produc looks inac. Handling Do no disassemble he pars. Doing so may cause dus o ener he produc or degrade he assembly accuracy. Tiling he spline nu or he spline shaf when hey are assembled may cause i o fall by is own weigh. Dropping or hiing he Miniaure Ball Spline may damage i. Subjecing he produc o impac may cause funcional loss even if he produc looks inac. Lubricaion Thoroughly remove anirus oil and feed a lubrican before using he produc. Do no mix lubricans of differen physical properies. In locaions exposed o consan vibraions or in special environmens such as clean rooms, vacuum and low/high emperaure, normal lubricans may no be used. Conac THK for deails. When planning o use a special lubrican, conac THK before using i. When adoping oil lubricaion, he lubrican may no be disribued hroughou he produc depending on he mouning orienaion of nu. Conac THK for deails. Lubricaion inerval varies according o he condiions. Conac THK for deails. Precauions on Use Enrance of foreign maerial may damage he ball circulaion par or cause funcional loss. Preven foreign maerial, such as dus and cuing chips, from enering he produc. When planning o use he produc in an environmen where he coolan peneraes ino he spline nu, i may disrup he funcion of he produc depending on he ype of he coolan. Conac THK for deails. Do no use he produc a a emperaure above ºC. Conac THK if you desire o use he produc a a emperaure above ºC. If foreign maerial, such as dus or cuing chips, adheres o he produc, replenish he lubrican afer cleaning he produc. For he ype of he cleaning fluid o be used, conac THK. When using he produc in locaions exposed o consan vibraions or in special environmens such as clean rooms, vacuum and low/high emperaure, conac THK in advance. Removing he spline nu from he spline shaf hen reinsalling i ono he shaf may cause balls o fall. Take much care in handling he produc. Sorage When soring he Miniaure Ball Spline, enclose i in a package designaed by THK and sore i in a horizonal orienaion while avoiding high emperaure, low emperaure and high humidiy. LM GUIDE, and are regisered rademarks of THK CO., LTD. The phoo may differ slighly in appearance from he acual produc. The appearance and specificaions of he produc are subjec o change wihou noice. Conac THK before placing an order. Alhough grea care has been aken in he producion of his caalog, THK will no ake any responsibiliy for damage resuling from ypographical errors or omissions. For he expor of our producs or echnologies and for he sale for expors, THK in principle complies wih he foreign exchange law and he Foreign Exchange and Foreign Trade Conrol Law as well as oher relevan laws. For expor of THK producs as single iems, conac THK in advance. All righs reserved NORTH AMERICA THK America,Inc. 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