1 The Characteristics of MI s The Classification Chart of MI s 2 (1) igh positioning accuracy, high repeatability The MI linear guideway is a design of rolling motion with a low friction coefficient, and the difference between dynamic and static friction is very small. Therefore, the stick-slip will not occur when submicron feeding is making. (2) Low frictional resistance, high precision maintained for long period The frictional resistance of a linear guideway is only 1/2th to 1/4th of that in a slide guide. With a linear guideway, a well lubrication can be easily achieved by supplying grease through the grease nipple on carriage or utilizing a centralized oil pumping system, thus the frictional resistance is decreased and the accuracy could be maintained for long period. (3) igh rigidity with four-way load design The optimum design of geometric mechanics makes the linear guideway to bear the load in all four directions, radial, reversed radial, and two lateral directions. Furthermore, the rigidity of linear guideway could be easily achieved by preloading carriage and by adding the number of carriages. (4) Suitable for high speed operation Due to the characteristic of low frictional resistance, the required driving force is much lower than in other systems, thus the power consumption is small. Moreover, the temperature rising effect is small even under high speed operation. Type Model Characteristics Major Application Full Ball, eavy Load Type Full Ball, Compact Type MSA-A MSA-LA MSA-E MSA-LE MSA-S MSA-LS MSB-TE MSB-E MSB-TS MSB-S eavy Load, igh Rigidity Self Alignment Capability Low Noise Interchangeability Compact, igh Load Self Alignment Capability Low Noise Interchangeability Machine Center, NC lathe, XYZ axes of heavy cutting tools, Grinding head feeding axis of grinding s, Milling, Z axis of boring and tools, EDM, Z axis of industrial, Measuring equipment, recision XY table, Welding, Binding, Auto packing (5) Easy installation with interchangeability Compared with the high-skill required scrapping process of conventional slide guide, the linear guideway can offer high precision even if the mounting surface is d by milling or grinding. Moreover the interchangeability of linear guideway gives a convenience for installation and future maintenance. Full Ball, Miniature Type MSC Ultra Compact Low Noise Ball Retainer Interchangeability IC/LSI manufacturing, ard disc drive, Slide unit of OA equipment, Wafer transfer equipment, rinted circuit board assembly table, Medical equipment, Inspection equipment B4 The Characteristics of MI s B5
Type Model Characteristics Major Application MSR-E Full Roller, eavy Load Type MSR-LE MSR-S Ultra eavy Load Ultra igh Rigidity Low Noise Good lubricant Effect Machine Center, NC lathe, Grinding, Five axes milling, Jig borer, Drilling, orizontal milling, Mold processing, EDM MSR-LS SME-E eavy Load, igh Rigidity Machine Center, NC lathe, XYZ axes of heavy Ball Chain, eavy Load Type SME-LE SME-S Self Alignment Capability Ball Chain Design Low Noise, Good Lubricant Effect cutting tools, Grinding head feeding axis of grinding s, milling, Z axis of boring and tools, EDM, Z axis of industrial, Measuring equipment, recision XY table, Welding, Binding SME-LS Interchangeability, Auto packing SMR-E Roller Chain, eavy Load Type SMR-LE SMR-S Ultra eavy Load Ultra igh Rigidity Roller Chain Design Low Noise Good Lubricant Effect Machine Center, NC lathe, Grinding, Five axes milling, Jig borer, Drilling, orizontal milling, Mold processing, EDM SMR-LS B6 The Classification Chart of MI s B7
1 Accuracy Standard The accuracy of linear guideway includes the dimensional tolerance of height, width, and the running accuracy of the carriage on the rail. The standard of the dimension difference is built for two or more carriages on a rail or a number of rails are used on the same plane. The accuracy of linear guideway is divided into 5 classes, normal grade (N), high 1.1 The Selection of Accuracy Grade The accuracy grade for different applications shown as table below. precision (), precision (), super precision (S), and ultra precision (U). Running parallelism Sort Application Accuracy Grade N S U Sort Application Accuracy Grade N S U The running accuracy is the deviation of parallelism between the reference sur face of carriage and reference surface of rail when carriage moving over the entire length of rail. Machining center Lathe Milling Boring Industrial Robot Cartesian coordinate robot Cylindrical coordinate robot Jig borer Wire bonder W 2 eight difference (Δ) The height difference (Δ) means the height difference among carriages installed on the same plane. Machine Tool Grinding Electric discharge unching press Laser-beam Woodworking NC drilling Semiconductor Manufacturing rober Electroniccomponent inserter rinted-circuitboard drilling Injection-molding 3D measuring instrument Office equipment Width difference (ΔW 2 ) The width difference (ΔW2) means the width difference among carriages installed on a rail. Tapping center allet changer ATC Others Transfer equipment XY table ainting Additional remarks 1. When two or more linear guideways are used on the same plane, the tolerance of W2 and difference of ΔW2 is applicable to master rail only. Wire cutter Dresser Welding Medical equipment Digitizer 2. The accuracy is measured at the center or central area of carriage. Inspection equipment B22 Accuracy Standard B23
1.2 Accuracy Standard of Each Series Accuracies of series MSA, MSB, MSR, SME and SMR Model No. 15 2 25 3 35 45 55 65 Item Normal N igh Tolerance for height ±.1 ±.3 Accuracy Grade recision -.3 Super recision S -.15 Ulitra recision U -.8 eight difference Δ.2.1.6.4.3 Tolerance for distance W 2 ±.1 ±.3 -.3 -.15 -.8 Difference in distance W 2 (ΔW 2 ).2.1.6.4.3 Running parallelism of surface C with surface A Running parallelism of surface D with surface B Tolerance for height ±.1 ±.4 ΔC (see the right table) ΔD (see the right table) -.4 -.2 -.1 eight difference Δ.2.15.7.5.3 Tolerance for distance W 2 ±.1 ±.4 -.4 -.2 -.1 Difference in distance W 2 (ΔW 2 ).3.15.7.5.3 Running parallelism of surface C with surface A Running parallelism of surface D with surface B Tolerance for height ±.1 ±.5 ΔC (see the right table) ΔD (see the right table) -.5 -.3 -.2 eight difference Δ.3.15.7.5.3 Tolerance for distance W 2 ±.1 ±.5 -.5 -.3 -.2 Difference in distance W 2 (ΔW 2 ).3.2.1.7.5 Running parallelism of surface C with surface A Running parallelism of surface D with surface B Tolerance for height ±.1 ±.7 ΔC (see the right table) ΔD (see the right table) -.7 -.5 -.3 eight difference Δ.3.2.1.7.5 Tolerance for distance W 2 ±.1 ±.7 -.7 -.5 -.3 Difference in distance W 2 (ΔW 2 ).3.25.15.1.7 Running parallelism of surface C with surface A Running parallelism of surface D with surface B ΔC (see the right table) ΔD (see the right table) C A C D B A W 2 D B length (mm) Running arallelism Values (μm) Above Or less N S U 315 9 6 3 2 1.5 315 4 11 8 4 2 1.5 4 5 13 9 5 2 1.5 5 63 16 11 6 2.5 1.5 63 8 18 12 7 3 2 8 1 2 14 8 4 2 1 125 22 16 1 5 2.5 125 16 25 18 11 6 3 16 2 28 2 13 7 3.5 2 25 3 22 15 8 4 25 3 32 24 16 9 4.5 3 35 33 25 17 11 5 35 4 34 26 18 12 6 For MSR and SMR series, only high or higher grades apply. B24 Accuracy Standard B25
reload and Rigidity 11 Accuracy of MSC series, divided into 3 classes, normal grade (N), high precision (), precision () Model No. 7 9 12 15 Item Normal N Accuracy Grade igh recision Tolerance for height ±.4 ±.2 ±.1 eight difference Δ.3.15.7 Tolerance for distance W 2 ±.4 ±.25 ±.15 Difference in distance W 2 (ΔW 2 ).3.2.1 Running parallelism of surface C with surface A Running parallelism of surface D with surface B ΔC (see Fig) ΔD (see Fig) Δ D B C A D Δ C A W2 B The rigidity of a linear guideway could be enhanced by increasing the preload. As shown as right figure, the load could be raised up to 2.8 times the preload applied. The preload is represented by negative clearance resulting from the increase of rolling element diameter. Therefore, the preload should be considered in calculation service life. 11.1 The Selection of reload Deformation (δ) 2 Light preload (FC) Medium preload (F) eavy preload (F1) : reload 2.8 Load Selecting proper preload from table below to adapt the specific application and condition. reload Operating Condition Major Application length (mm) Running arallelism Values (μm) Above Or less N length (mm) Running arallelism Values (μm) Above Or less N Light preload (FC) The loading direction is fixed, vibration and impact are light, and two axes are applied in parallel. igh precision is not required, and the low frictional resistance is needed. Welding, binding, auto packing, XY axis of ordinary industrial, material handling equipments. - 4 8 4 1 4 7 1 4 1 7 1 11 4 2 1 13 12 5 2 13 16 13 6 2 16 19 14 7 2 19 22 15 7 3 22 25 16 8 3 25 28 17 8 3 28 31 17 9 3 31 34 18 9 3 34 37 18 1 3 37 4 19 1 3 4 43 2 11 4 43 46 2 12 4 46 49 21 12 4 49 52 21 12 4 52 55 22 12 4 55 58 22 13 4 58 61 22 13 4 61 64 22 13 4 64 67 23 13 4 67 7 23 13 5 7 73 23 14 5 73 76 23 14 5 76 79 23 14 5 79 82 23 14 5 82 85 24 14 5 85 88 24 15 5 88 91 24 15 5 91 94 24 15 5 94 97 24 15 5 97 1 25 16 5 Medium preload (F) eavy preload (F1) Ultra heavy preload (F2) Overhang application with a moment load. Applied in one-axis configuration The need of light preload and high precision. Machine is subjected to vibration and impact, and high rigidity required. Application of heavy load or heavy cutting. Machine is subjected to vibration and impact, and high rigidity required. Application of heavy load or heavy cutting. 11.2 reload Grades of Each Series reload grades of each series is shown as the table below, the preload is the percentage of basic dynamic load rating (C). The basic dynamic load rating is reference to the dimension tables of each series. reload grade and preload(n) Series Z axis of industrial s, EDM, precision XY table, C board drilling, industrial robot, NC lathe, measuring equipment, grinding, auto painting. Machine center, NC lathe, grinding, milling, Z axis of boring and tools. Machine center, NC lathe, grinding, milling, Z axis of boring and tools. MSA MSB MSR MSC SME SMR Light preload (FC).2 C (Zero) Medium preload (F).5 C (.2C) eavy preload (F1).8 C Ultra heavy preload (F2).13 C B26 Accuracy Standard B27
12 Introduction of Each Series 12.1 eavy Load Type, MSA Series A. Construction Upper Retainer C. Type eavy Load MSA-A Type MSA-E Type MSA-S Type End Seal End Cap Grease Nipple Ball Lower Retainer 45 Bottom Seal 45 B28 B. Characteristics The trains of balls are designed to a contact angle of which enables it to bear an equal load in radial, reversed radial and lateral directions. Therefore, it can be applied in any installation direction. Furthermore, MSA series can achieve a well balanced preload for increasing rigidity in four directions while keeping a low frictional resistance. This is especially suit to high precision and high rigidity required motion. The patent design of lubrication route makes the lubricant evenly distribute in each circulation loop. Therefore, the optimum lubrication can be achieved in any installation direction, and this promotes the performance in running accuracy, service life, and reliability. igh Rigidity, Four-way Equal Load Self Alignment Capability The four trains of balls are allocated to a circular The self adjustment is performed spontaneously as contact angle at, thus each train of balls can take the design of face-to-face (DF) circular arc groove. up an equal rated load in all four directions. Moreover, Therefore, the installation error could be compensated a sufficient preload can be achieved to increase rigidity, even under a preload, and which results in precise and and this makes it suitable for any kind of installation. smooth linear motion. Smooth Movement with Low Noise Interchangeability The simplified design of circulating system with For interchangeable type of linear guideway, the strengthened synthetic resin accessories makes the dimensional tolerances are strictly maintained movement smooth and quiet. within a reasonable range, and this has made the random matching of the same size of rails and carriages possible. Therefore, the similar preload and accuracy can be obtained even under the random matching condition. As a result of this advantage, the linear guideway can be stocked as standard parts, the installation and maintenance become more convenient. Moreover, this is also beneficial for shortening the delivery time. eavy Load Type, MSA Series Installed from top side of carriage with the This type offers the installation either from top Square type with smaller width and can be thread length longer than MSA-E type. or bottom side of carriage. installed from top side of carriage. Ultra eavy Load MSA-LA Type MSA-LE Type MSA-LS Type All dimensions are same as MSA-A except the length is longer, which makes it more rigid. All dimensions are same as MSA-E except the length is longer, which makes it more rigid. All dimensions are same as MSA-S except the length is longer, which makes it more rigid. B29
12.2 Compact Type, MSB Series A. Construction End Seal Upper Retainer End Cap C. Type Medium Load MSB-TE Type MSB-TS Type Grease Nipple Ball Lower Retainer 45 B. Characteristics 45 Bottom Seal The trains of balls are designed to a contact angle of which enables it to bear an equal load in radial, reversed radial and lateral directions. Therefore, it can be applied in any installation direction. Furthermore, MSB series can achieve a well balanced preload for increasing rigidity in four directions while keeping a low frictional resistance. This is especially suit to high precision and high rigidity required motion. The patent design of lubrication route makes the lubricant evenly distribute in each circulation loop. Therefore, the optimum lubrication can be achieved in any installation direction, and this promotes the performance in running accuracy, service life, and reliability. This type offers the installation either from top or bottom side of carriage. Square type with smaller width and can be installed from top side of carriage. Compact, Four-way Equal Load Compact design of the carriage with the four trains of balls are allocated to a circular contact angle at, thus each train of balls can take up an equal rated load in all four directions. Moreover, a sufficient preload can be achieved to increase rigidity, and this makes it suitable for any kind of installation. Self Alignment Capability The self adjustment is performed spontaneously as the design of face-to-face (DF) circular arc groove. Therefore, the installation error could be compensated even under a preload, and which results in precise and smooth linear motion. eavy Load MSB-E Type MSB-S Type Smooth Movement with Low Noise Interchangeability B36 The simplified design of circulating system with strengthened synthetic resin accessories makes the movement smooth and quiet. Compact Type, MSB Series For interchangeable type of linear guideway, the dimensional tolerances are strictly maintained within a reasonable range, and this has made the random matching of the same size of rails and carriages possible. Therefore, the similar preload and accuracy can be obtained even under the random matching condition. As a result of this advantage, the linear guideway can be stocked as standard parts, the installation and maintenance become more convenient. Moreover, this is also beneficial for shortening the delivery time. All dimensions are same as MSB-TE except the length is longer, which makes it more rigid. All dimensions are same as MSB-TS except the length is longer, which makes it more rigid. B37
roduct Dimensions of MSB-TS / MSB-S 12.3 Full Roller Type, MSR Series M A. Construction T W B MY End Cap End Seal Grease Nipple 2 W2 W1 MR Specifications Model No. MSB 15 TS MSB 15 S MSB 2 TS MSB 2 S MSB 25 TS MSB 25 S MSB 3 TS MSB 3 S MSB 35 TS MSB 35 S MSB 35 LS eight 1 h Ød E 4-Ød1 N ØD (G) K External dimension Width W 24 34 28 42 33 48 42 6 48 7 Length L 4 57 48 67 6.2 82 68 96.7 78 112 137.5 MSB-S L L1 C 4-Sxl MSB-TS L L1 2-Sxl (G) K dimension N Unit: mm W 2 2 B C S l L 1 T N G K d 1 Grease Nipple 9.5 4.5 26 11 6 32 12.5 7 35 16 9.5 4 18 9.5 5-26 - 32-35 - 4-5 72 M4 6 M5 7 M6 9 M8 12 M8 12 23.5 4.5 29 48 38.7 6.5 43.3 72 46 8 15.5 6 5.5 5.5 5.1 3.3 G-M4 6 5.5 12 5.9 3.3 G-M6 8 6 12 6.3 3.3 G-M6 8 8 12 6.3 3.3 G-M6 12.5 8.5 11.5 9.8 3.3 G-M6 B. Characteristics Roller Bottom Seal Inner Seal The full roller type linear guideway, MSR series, equip with rollers instead of the ball, and therefore the MSR series can provide higher rigidity and loading than the normal type with the same size. Especially suit for the requests of high accuracy, heavy load and high rigidity. Ultra eavy Load MSR linear guideway through rollers have a line contact with carriage and rail. Relative to the general type linear guideway through balls have a point contact; the MSR type linear guideway can offer lower elastic deformation while bearing the same load. Base on the rollers have the same outer diameter with balls, the roller can bear the heavier load. The excellent characteristics of high rigidity and ultra heavy load can suitable for the high accuracy application that heavy load is processed even more. The Optimization Design of Four Directional Load Through the structure stress analysis of finite element method, SMR series have four trains of rollers are designed to a contact angle of and the section design for high rigidity. Except for bearing heavier loads in radial, reversed radial and lateral directions, a sufficient preload can be achieved to increase rigidity, and this makes it suitable for any kind of installation. dimension Basic load rating Static moment rating Weight Model No. Width W 1 eight 1 itch E std. D h d Dynamic C kn Static C o kn M kn-m M Y kn-m Single * Double* Single * Double* M R kn-m kg kg/m MSB 15 TS MSB 15 S MSB 2 TS MSB 2 S MSB 25 TS MSB 25 S MSB 3 TS MSB 3 S MSB 35 TS MSB 35 S MSB 35 LS Note: mounting holes for M3 (6x4.5x3.5) and M4 (7.5x5.3x4.5) are available for MSB15 rail. The codes of rail type are MSB15R for M3 mounting holes, and MSB15U for M4 mounting holes. Note* : Single: Single carriage/ Double: Double carriages closely contacting with each other. Note: The basic dynamic load rating C of ball type is based on the 5 km for nomonal life. The conversion between C for 5 km and C 1 for 1 km is C=1.26 x C 1. 15 12.5 6 2 6 4.5 3.5 (7.5 5.3 4.5) 2 15 6 2 9.5 8.5 6 23 18 6 2 11 9 7 28 23 8 2 11 9 7 34 27.5 8 2 14 12 9 6.7 1. 9.7 13.9 15.6 22.3 23.1 32.9 35.7 52. 63.6 9.6 16.9 14.2 23.6 22.1 36.9 31.8 53.1 44. 75.5 1.6.4.1.7.18.13.35.23.6.34.93 1.6.26.61.44.97.91 1.87 1.39 3.15 2.81 5.47 8.67.4.1.7.18.13.35.23.6.34.93 1.6.26.61.44.97.91 1.87 1.39 3.15 2.81 5.47 8.67.7.13.14.24.26.43.45.74.75 1.28 1.67.9.16.16.26.29.45.52.82.81 1.13 1.49 1.2 2 3 4.4 6.2 Ultra igh Rigidity Test data of rigidity Test samplesball type MSA3L with preload F1 Full roller type MSR3L with preload F1 Roller chain type SMR3L with preload F1 Deformation(m) 2 15 1 5 5 1 MSA3L MSR3L SMR3L Radial load 15 2 B42 Dimensions of MSB B43
roduct Dimensions of MSR-S / MSR-LS M Y 12.4 Miniature Type, MSC Stainless Steel Series A. Construction M R M e 1 6-Sxl C End Cap Specifications l T W B 2 W 2 W 1 S 1 h Ød E ØD N (G) L K L 1 4-G1 End Seal Retainer Bottom Seal Ball Model No. MSR 25 S MSR 25 LS MSR 3 S MSR 3 LS MSR 35 S MSR 35 LS MSR 45 S MSR 45 LS MSR 55 S MSR 55 LS eight dimension Width W 4 48 45 6 55 7 7 86 8 1 Length L 97.5 115.5 112.1 136 125.3 154.4 154.2 189.7 185.4 235.4 External dimension W 2 2 B C S l L 1 T N G K e 1 G 1 Grease Nipple 12.5 4.8 35 16 6 4 18 6.5 5 2.5 8 6 23.5 1 75 35 5 4 6 5 72 6 8 75 95 M6 1.5 M8 12 M8 14 M1 19 M12 19 65.5 83.5 75.6 99.5 82.3 111.4 16.5 142 129.5 179.5 9.5 1 12 6.6 6.5 M6 G-M6 1 1 12 8 7 M6 G-M6 12 15 12 8 7 M6 G-M6 17 2 13.5 1 1 M6 G-T 1/8 18 21 13.5 12 7.95 M6 G-T 1/8 MSR 65 LS 9 126 32 31.5 12 76 12 M16 2 23 19.5 16.5 13.5 15 15 M6 G-T 1/8 Model No. MSR 25 S MSR 25 LS MSR 3 S MSR 3 LS MSR 35 S MSR 35 LS MSR 45 S MSR 45 LS MSR 55 S MSR 55 LS Width W 1 eight 1 dimension Basic load rating Static moment rating Weight itch E std. D h d 23 23.5 3 2 11 9 7 28 27.5 4 2 14 12 9 34 3.5 4 2 14 12 9 45 37 52.5 22.5 2 17 14 53 43 6 3 23 2 16 Dynamic C kn 29.6 36.3 42.8 54. 57.9 73.9 92.8 117.2 132.8 172.5 Static C o kn 63.8 82.9 91.9 124. 123.5 169. 193.8 261.6 27. 378. M kn-m M Y kn-m Single * Double* Single * Double*.65 1.8 1.9 1.96 1.59 2.94 3.28 5.9 5.49 1.6 3.82 5.94 6.38 1.6 9.56 16.18 18.76 31.32 31.18 55.58.65 1.8 1.9 1.96 1.59 2.94 3.28 5.9 5.49 1.6 3.82 5.94 6.38 1.6 9.56 16.18 18.76 31.32 31.18 55.58 M R kn-m kg kg/m MSR 65 LS 63 52 75 35 26 22 18 277. 624. 22.5 117.87 22.5 117.87 2.2 13.3 22.4 Note* : Single: Single carriage/ Double: Double carriages closely contacting with each other..73.95 1.27 1.72 2.9 2.85 4.4 5.94 7.33 1.26.65.85 1 1.22 1.65 2.15 3.2 4.1 5.1 7 Unit: mm 3.5 5 7 11.2 15.6 B. Characteristics MSC st ows with Gothic-arch groove and designed to contact angle of which enables it to bear an equal load in radial, reversed radial and lateral directions. Furthermore, ultra compact and low friction resistance design is suit to compact equipment. The lubrication route makes the lubricant evenly distribute in each circulation loop. Therefore,the optimum lubrication can be achieved in any installation direction, and this promotes the performance in running accuracy, service life, and reliability. Four-way Equal Load Smooth Movement with Low Noise The two trains of balls are allocated to a Gothic-arch The simplified design of circulating system with groove contact angle at, thus each train of balls can strengthened synthetic resin accessories makes the takeup an equal rated load in all four directions. movement smooth and quiet. Ultra Compact Interchangeability The ultra compact design is suit to the compact For interchangeable type of linear guideway, the application with limited in space. dimensional tolerances are strictly maintained within a reasonable range, and this has made the Ball Retainer random matching of the same size of rails and carriages possible. Therefore, the similar preload and Design with ball retainer can prevent ball form accuracy can be obtained even under the random dropping. matching condition. As a result of this advantage, the linear guideway can be stocked as standard parts, the installation and maintenance become more convenient. Moreover, this is also beneficial for shortening the delivery time. B48 Dimensions of MSR B49
12.5 Ball Chain Type, SME Series A. Construction C. Type eavy Load End Cap End Seal Grease Nipple SME-EA Type SME-EB Type Inner Seal Ball Bottom Seal Ball Chain B. Characteristics The ball chain type linear guideway, SME series, equip with the patent of ball chain design can make the movement smooth and stability, especially suit for the requests of high speed, high accuracy. The Optimization Design of Four Directional Load Self Alignment Capability Through the structure stress analysis, SME series have The self adjustment is performed spontaneously as the four trains of balls are designed to a circular contact design of face-face (DF) circular arc groove. Therefore, angle of and the section design for high rigidity. the installation error could be compensated even Except for bearing heavier loads in radial, reversed under a preload, and which results in precise and radial and lateral directions, a sufficient preload can be smooth linear motion. achieved to increase rigidity, and this makes it suitable for any kind of installation. This type offers the installation either from top or bottom side of carriage. SME-SA Type All dimensions are same as SME-EA except the mounting hole dimensions of carriage are different and the height is lower, which do not change the basic loading rating. SME-SB / SME-SV Type Ball Chain Design, Smooth Movement Low Noise, Good Lubricant Effect The concise and smooth design of circulating system with strengthened synthetic resin accessories and cooperating with the ball chain, these can avoid interference between balls and make the balls more stability during passing in and out the load district. Besides, the ball chain can keep the ball move in a line and improve the movement most smooth substantially. Kgf 1.6 Ball chain type, SME series Standard type, MSB series 1.2.8.4 The ball chain design avoids interference between balls, lowers the operating noise, and can keep the lubricant between the balls and ball chain effectively. Moreover, improve the movement smooth and service life of the whole, can meet high accuracy, high reliability and smooth and stability. Noise Level (dba) SME3 MSB3 9 dba Square type with smaller width and can be installed from top side of carriage. All dimensions are same as SME-SA except the mounting hole dimensions of carriage are different and the height is lower, which do not change the basic loading rating. 1 2 3 4 mm Rolling resistance test Speed (m/min) Noise level comparison test B54 Ball Chain Type, SME Series B55