F-1 SLIDE GUIDE STROKE BALL SPLINE ROTARY BALL SPLINE BALL SPLINE TOPBALL PRODUCTS SLIDE BUSH SLIDE UNIT SLIDE ROTARY BUSH STROKE BUSH SLIDE SHAFT

Transcription

1 SLIDE GUIDE BALL SPLIE ROTARY BALL SPLIE STROKE BALL SPLIE TOPBALL PRODUTS SLIDE BUSH SLIDE UIT SLIDE WAY/GOIO WAY MIIATURE SLIDE F- ATUATOR SLIDE SREW

2 The B stroke bush is a linear and rotational motion mechanism utilizing the rotational motion of ball elements between an outer cylinder and a shaft. It is compact and can with stand high loading. The retainer is made of a light metal alloy with high wear resistance. Smooth motion is achieved under high-speed and high-acceleration conditions. Although the linear motion is limited to a predetermined stroke distance, the smooth combination of linear and rotational motions is achieved with very little frictional resistance. The B stroke bush may be conveniently used in a variety of applications. STRUTURE AD ADVATAGES The retainer in the B stroke bush positions the ball elements in a zigzag arrangement. The inner surface of the outer cylinder is finished by grinding, resulting in the smooth motion of the ball elements. Each of the ball elements is held in a separate hole and smooth motion is achieved for both rotational motion and linear motion. The retainer moves half the distance of the linear motion, therefore, the stroke distance is limited to approximately twice the distance the retainer can travel within the outer cylinder. The actual stroke should be limited to % of the maximum stroke as listed in the dimensional tables. High Precision High-carbon, chromium-bearing steel is used for the outer cylinder. It is heat treated and ground to achieve high rigidity and accuracy. Ease of Mounting / Replacement The highly accurate fabrication of the B stroke bush results in uniform dimensions, facilitating parts replacement and housing fabrication. Light Weight / Space Saving The use of an aluminum alloy for the retainer and the thin-wall outer cylinder make the B stroke bush light weight and compact. Figure F- Structure of SR Stroke Bush Lubrication Lubrication holes are provided on the oil grooves of the outer cylinder, making it easy to lubricate the SR stroke bush. outer cylinder seal ball retainer F-

3 SLIDE GUIDE AURAY The accuracies of the SR stroke bush are stated in the dimensional tables. Since the outer cylinder deforms due to tension from the retaining ring, the dimension of the outer cylinder is an average value at points P, where calculated using the following equation: W = 4+ L W : the distance from the end of the outer race to measurement point P L : the length of the outer race FIT The s of the SR stroke bush are listed in the dimensional tables. The shaft diameter should be selected to achieve the desired amount of radial clearance. High-speed linear motion can cause the retainer to slip due to inertial force. An interference fit of to RATED LOAD AD RATED LIFE The relationship between the rated load and life of the stroke bush is expressed as follows: L = P L : the rated life ( rotations), : the basic dynamic rated load () P : load () For rotation/stroke combined motion L Lh = (dm n) +( S n) dm The allowable speed for combined rotation and stroke motion is obtained from the following equation: F- Figure F- Outer ylinder Measurement Points will compensate for such slip. The fits generally used between the shaft and the housing are listed in the table below. Table F- For stroke motion ALLOWABLE SPEED FOR OMBIED ROTATIO/STROKE MOTIO D dm n+ S n normal operating condition shaft housing k,m H,H Lh : travel life in time (hr) S : stroke distance () n : revolution per min. (rpm) n : stroke frequency per min. (cpm) dm : ball pitch diameter (). dr The value of D is given as follows depending on the lubrication method. for oil lubrication for grease lubrication note n, S, vertical use or highly accurate case shaft housing n,p J,J L Lh = S n ( dm) D=, D=, BALL SPLIE ROTARY BALL SPLIE STROKE BALL SPLIE TOPBALL PRODUTS SLIDE BUSH SLIDE UIT SLIDE WAY/GOIO WAY MIIATURE SLIDE ATUATOR SLIDE SREW

4 F-4 SR TYPE SR example SR type number of rows maximum stroke part number mass static dynamic r d t T L D dr o g SR SR SR 4, SR, SR,, SR,,.... SR,4,.. SR,, SR 4, 4,.. 4 SR 4,,4..4 SR,4,, SR,,,4..4 SR,44 4,,4. / +/+ SR.kgf

5 SLIDE GUIDE SR-UU TYPE example SR type SR UU seals on both sides BALL SPLIE ROTARY BALL SPLIE STROKE BALL SPLIE TOPBALL PRODUTS SLIDE BUSH SLIDE UIT part number SR UU SR UU SR UU SR UU SR UU SR UU SR UU SR UU SR 4UU SR UU SR UU SR UU SRUU maximum number stroke of rows dr /+ D / / L F T... t d r..... dynamic static mass o g 4. 4., 4,,,,,,,4,4, 4, 4,,4,,,,4,4,,,4 4,,44.kgf SLIDE WAY/GOIO WAY MIIATURE SLIDE ATUATOR SLIDE SREW

6 F- SR-B TYPE SR example SR type B double retainer number of rows maximum stroke part number mass static dynamic r d t T L D dr o g / + + SR B.,.... SR B 4,, SR B,,.... SR B,, SR B,,.... SR B, 4,.. 44 SR B 4,, SR B 4,,.. 4 SR 4B,,..4 SR B,,, SR B, 4,,..4 SR B,,4,. / +/+ SRB.kgf

7 SLIDE GUIDE SR-BUU TYPE example SR SR type B UU seals on both sides double retainer BALL SPLIE ROTARY BALL SPLIE STROKE BALL SPLIE TOPBALL PRODUTS SLIDE BUSH SLIDE UIT part number SR BUU SR BUU SR 4BUU SR BUU SR BUU SR BUU SRBUU maximum number stroke of rows 4 4 dr +/ /+ D / / L T... t d.... r dynamic static mass o g 4,,,, 4,, 4,,,,,, 4,,,,4,.kgf SLIDE WAY/GOIO WAY MIIATURE SLIDE F- ATUATOR SLIDE SREW

8 B's Slide Rotary Series consists of three different types. The Slide Rotary Bush, which provides both endless rotary and linear motion functions, the Flanged Slide Rotary Bush, and the Slide Rotary Unit which is assembled using various B standard housings. The B Slide Rotary Series has an idealistic structure, incorporating a combination of linear and rotary motion. Linear and rotary motion are merged into a single unit resulting in great space savings compared to the conventional style of Slide Bushings. All three types of the Slide Rotary Series are available in sizes ranging from to. All components in the Slide Rotary Series are standardized for versatile installation requirements. STRUTURE AD ADVATAGES B Slide Rotary Bush is composed of retainer fitted into cylindrical steel outer race and is designed to guide steel balls for smooth circulation in its retainer. The retainer is also designed to rotate freely towards radial direction and offers smooth linear and rotary motions. Smooth Operation The inner surface of the outer race allows smooth operation of linear and rotary motions while maintaining a uniform load distribution. High Load apacity The use of comparatively large diameter steel balls enhances acceptability of high load capacity. Smooth Rotation The positioning of the steel balls in a cylindrical formation inside the retainer enables a smooth rotational motion to be achieved independent of the installation direction. omplete Interchangeability B Slide Rotary series is completely interchangeable with SM type Slide Bush, SMK type Flanged Slide Bush and Slide Units such as SMA(W) type, AK(W) type and SMP type. Figure F- Structure of SRE-type B slide rotary bush outer race linear motion ball ellements retainer side ring rotation F-

9 SLIDE GUIDE RATED LIFE AD LOADS The rated life and loads are defined as follows. Rated Life When a group of slide rotary bearings of the same type are used under the same conditions, the rated life is defined as the total number of rotations made without flaking by % of the bearings. Basic Dynamic Rated Load The basic dynamic rated load is defined as the load with a constant magnitude and direction at which a rated life of rotations can be achieved. Basic Static Rated Load The basic static rated load is defined as the load with a constant direction that would result in a certain contact stress at the mid-point of the rolling element and tracking surface that are experiencing the maximum stress. Formula gives the relation between the applied load and the rated life of the slide rotary bush. L= L : rated life ( rotations) fh : hardness coefficient ft : temperature coefficient f : contact coefficient fw : load coefficient : basic dynamic rated load () P : applied load () Since the slide rotary bush is used in applications with combined linear and rotary motions, the life time is obtained using Formulas and. When linear and rotary motions are combined When only linear motion is involved Lh= fh ft f fw P L Lh= (dm n) (Sn) dm L S n dm Lh : life (hours) S : stroke () n : number of rotations per minute (rpm) n : number of strokes per minute (cpm) dm : ball pitch diameter () = approx.. dr (dr is the inner contact diameter of the SRE-type bush) BALL SPLIE ROTARY BALL SPLIE STROKE BALL SPLIE TOPBALL PRODUTS SLIDE BUSH SLIDE UIT alculation Example The life of an SRE-type B slide rotary bush is calculated below based on the following operating conditions. onditions Motions : Linear and rotational, combined Load, P : Stroke, S : umber of rotations per minute (rpm), n= alculation: Basic rated load, =4 Based on the above operating conditions, the life is calculated using the following coefficient values. Hardness coefficient, fh= Temperature coefficient, ft= ontact coefficient, f= Load coefficient, fw= Rated life fh ft f L= fw P 4 = =, ( rotations) F- umber of strokes per minute (cpm), n= Shaft surface hardness : greater than HR Operating temperature : room temperature Other : single shaft with single bush Life (in time) L Lh= (dm n) (Sn) dm Lh= (. ) ( ) (. ) =, (hours) SLIDE WAY/GOIO WAY MIIATURE SLIDE ATUATOR SLIDE SREW

10 Application Examples Application Example Vertical Shaft Robot Arm Rotary Ball Spline SPR type Slide Rotary Flange Bush SREK type Application Example Multiple Gearing Idler Application Example 4 Turntable Slide Rotary Bush SRE type Application Example Tool hanger Slide Rotary Unit SMP-R type Slide Rotary Unit SMA-R type F-

11 SLIDE GUIDE Precautions Regarding Use Shaft Since the balls roll directly over the shaft surface in the SRE-type slide rotary bush, the accuracy and hardness of the shaft are important factors. Outer Diameter : A of g is recoended for smooth operation. Hardness : A hardness of greater than HR is recoended for long life. If the hardness is less than HR, the life is calibrated using the hardness coefficient. Surface Roughness : A roughness of less than.4ra is recoended. Housing An inner diameter of H is recoended. Lubrication Lubrication is needed () to prevent heat fusing and reduce wear between the rolling elements and between the rolling elements and the tracking surface, () to reduce wear of the structural elements, and () to prevent oxidation. Lubrication affects both the performance and life of the bush. A lubrication method and a lubrication agent appropriate to the operating conditions should be used. For oil lubrication, turbine oil (V-) should be used. For grease lubrication, lithium soap grease no. should be used. The replenishment interval depends on the operating conditions. Dust ontrol Dust and other contaminants affect the bush's lifetime and accuracy. Appropriate control methods are thus important. Operating Temperature Range The SRE-type bush can be operated at temperatures ranging from to. In a case of operating at a temperature outside this range, please contact B. Retainer Material The standard material of SRE Retainer is "Phosphor Bronze". When requiring other material, please contact B. BALL SPLIE ROTARY BALL SPLIE STROKE BALL SPLIE TOPBALL PRODUTS SLIDE BUSH SLIDE UIT The use of an FLM felt seal will improve the effectiveness of lubrication and extend the interval between applications of a lubricant. Figure F-4 Felt seal diagram d B Felt Seal D Table F- Felt seal dimensions part number d D B FLM FLM FLM FLM FLM FLM 4 FLM 4 FLM 4 FLM applicable slide rotary bush SRE SRE SRE SRE SRE SRE SRE SRE SRE SLIDE WAY/GOIO WAY MIIATURE SLIDE Installation The felt seal should be installed as shown in Figure F-. Please note that felt seal is not designed for stopper function. F- Figure F- Example of Installation ATUATOR SLIDE SREW

12 SRE TYPE example 4- SRE type D L B part number dr SRE SRE SRE SRE SRE SRE SRE SRE SRE *If the exceeds, please contact B. F-

13 SLIDE GUIDE W L B W BALL SPLIE ROTARY BALL SPLIE STROKE BALL SPLIE D D dr TOPBALL PRODUTS SLIDE BUSH SLIDE UIT W D dynamic static o allowable number of rotations per minute rpm number of ball circuit mass g part number SRE SRE SRE SRE. SRE ,,,, SRE SRE SRE SRE.kgf SLIDE WAY/GOIO WAY MIIATURE SLIDE F- ATUATOR SLIDE SREW

14 SREK TYPE Square Flange type example SREK SREK type inner contact dimeter D L part number dr. Df K SREK SREK SREK SREK SREK SREK SREK SREK SREK F-4

15 SLIDE GUIDE X Z Y mounting hole BALL SPLIE ROTARY BALL SPLIE STROKE BALL SPLIE D dr L t P..D. Df K TOPBALL PRODUTS SLIDE BUSH SLIDE UIT flange t P..D X Y Z perpendicularity dynamic static o allowable rotational speed rpm mass g part number SREK SREK SREK SREK SREK ,,,, SREK SREK SREK SREK.kgf SLIDE WAY/GOIO WAY MIIATURE SLIDE F- ATUATOR SLIDE SREW

16 F- SLIDE ROTARY UIT SMA-R TYPE Block type example SMA R SMA-R type part number mass static dynamic mounting dimensions outer dimensions o S S K B T G F L W E h g.4 M4 4 SMA R 4.4 M4 4 4 SMA R 4. M 4 SMAR 4 4. M SMAR 4. M SMAR 4. M SMAR, 4. M SMAR, M 4 4 SMAR,, M 4. SMAR.kgf

17 SLIDE GUIDE SLIDE ROTARY UIT SMA-RW TYPE Double-Wide Block type BALL SPLIE ROTARY BALL SPLIE STROKE BALL SPLIE example SMA R W SMA-R type double type TOPBALL PRODUTS SLIDE BUSH SLIDE UIT part number SMA RW SMA RW SMARW 4 h E outer dimensions W L F G T B 4 mounting dimensions K S M4 4 M4 4 M S dynamic 4 static o 44 mass g 4 4 SLIDE WAY/GOIO WAY MIIATURE SLIDE SMARW SMARW SMARW SMARW SMARW SMARW F M M M M M M ,,4,,,,,,,4,,.kgf ATUATOR SLIDE SREW

18 F- SLIDE ROTARY UIT AK-R TYPE ompact Block type example AK R AK-R type part number mass static dynamic mounting dimensions outer dimensions o H d S t L S L F L W E h g M 4 M AK R 4 M 4. M AK R 4 M. M AKR 4 M. M AKR M. M 4 4 AKR M M 4 4 AKR, 4 M M 4 4 AKR 44, 4 M M 4 AKR,, 4 M. M AKR.kgf

19 SLIDE GUIDE SLIDE ROTARY UIT AK-RW TYPE Double-Wide ompact Block type BALL SPLIE ROTARY BALL SPLIE STROKE BALL SPLIE example AK R W AK-R type double type TOPBALL PRODUTS SLIDE BUSH SLIDE UIT part number AK RW AK RW AKRW 4 h 4 outer dimensions E W L 4 F L S M 4 M M mounting dimensions.. L 4 t S M 4 M 4 M d H dynamic 4 static o 44 mass g 4 SLIDE WAY/GOIO WAY MIIATURE SLIDE AKRW AKRW AKRW AKRW AKRW AKRW M. M. M M M M. F- M M M M M M ,,4,, 4, 4,, 4,,,,44.kgf ATUATOR SLIDE SREW

20 SLIDE ROTARY UIT SMP-R TYPE Pillow Block type example SMP R SMP-R type outer dimensions part number h E W L F G M SMPR SMPR. 4 4 SMPR SMPR SMPR F-

21 SLIDE GUIDE BALL SPLIE ROTARY BALL SPLIE STROKE BALL SPLIE TOPBALL PRODUTS SLIDE BUSH SLIDE UIT P B adjustment mounting dimensions bolt size S bolt size dynamic static o mass part number S g M M M M M M M M 4,, SMPR SMPR SMPR SMPR 4 4 M M,,,4 SMPR.kgf SLIDE WAY/GOIO WAY MIIATURE SLIDE F- ATUATOR SLIDE SREW

22 B's RK type slide rotary bush is a highly accurate rigid component providing smooth continuous linear and rotational motion. Its structure imposes no constraints on either motion. It is much more compact than a standard slide bush with separate rotational bearing. STRUTURE AD ADVATAGES The RK type slide rotary bush uses a retainer similar to that used in the SR type stroke bush. This retainer provides the results of smooth rotational motion. The SM type slide bush is also used providing the smooth linear motion. Large ball elements are used enabling the bushing to withstand high loads..a smooth unlimited linear and rotational motion is obtained..there is no need to machine separate housing..high accuracy is ensured for extended period of usage. 4.Its high compatibility eliminates replacement problems..high rigidity enables it to withstand an unbalanced load and high load capacity. For best performance, please select of h for the shaft. alculation of Life: Figure F- Structure of RK Slide Rotary Bush fh ft f L = fw P outer cylinder L : travel life (km) fh : hardness coefficient ft : temperature coefficient f : contact coefficient fw : the loafficient : basic dynamic load rating () P : load () Refer to page Eng. for the coefficients. The contact coefficient is used when two or more bushings are used in close contact with each other on the same shaft. retainer slide bush F-

23 SLIDE GUIDE RK TYPE example RK RK type G UU seals on both sides resin retainer mounting hole x 4 BALL SPLIE ROTARY BALL SPLIE STROKE BALL SPLIE TOPBALL PRODUTS SLIDE BUSH SLIDE UIT part number RKGUU RKGUU RKGUU RKGUU RKGUU dr 4 D L Df K 4 4 flange dynamic static t P..D. X Y Z o ,..,.., 4.,,4 allowable rotational speed rpm mass g 4.kgf SLIDE WAY/GOIO WAY MIIATURE SLIDE F- ATUATOR SLIDE SREW