Linear Guideway
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Precise Stable Durability High Rigidity Meet the Multi-Demand of Accuracy and Efficiency

Linear Guideway

The Characteristics of PMI Linear Guideways (1) High positioning accuracy, high repeatability The PMI linear guideway is a design of rolling motion with a low friction coeffcient, 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 1/20th to 1/40th of that in a slide guide. With a linear guideway, a well lubrication can be easily achieved by supplying grease through the...

LINEAR GUIDEWAY The Characteristics of PMI Linear Guideways

The Classification Chart of PMI Linear Guideways Type Model MSA-A MSA-LA Full Ball, Heavy Load Type MSA-E MSA-LE MSA-S MSA-LS MSB-TE MSB-E Full Ball, Compact Type MSB-TS MSB-S MSC Full Ball, Miniature Type MSD

Major Application • Self Alignment Capability • Smooth Movement • Low Noise • Interchangeability Machine Center, NC lathe, XYZ axes of heavy cutting machine tools, Grinding head feeding axis of grinding machines, Milling machine, Z axis of boring machine and machine tools, EDM, Z axis of industrial machine, Measuring equipment, Precision XY table, Welding machine, Binding machine, Auto packing machine The Classification of PMI Linear Guideways • Heavy Load, High Rigidity LINEAR GUIDEWAY • Compact, High Load • Self Alignment Capability • Smooth Movement • Low Noise • Interchangeability •...

Model MSR-E Full Roller, Heavy Load Type MSR-LE MSR-S MSR-LS SME-E Ball Chain, Heavy Load Type SME-LE SME-S SME-LS SMR-E Roller Chain, Heavy Load Type SMR-LE SMR-S SMR-LS MSG-E Full Ball Wide Rail type MSG-S

• Ultra Heavy Load • Smooth Movement • Low Noise • Good lubricant Effect • Heavy Load, High Rigidity • Self Alignment Capability • Ball Chain Design • Smooth Movement • Low Noise, Good Lubricant Effect • Interchangeability Major Application Machine Center, NC lathe, Grinding machine, Five axes milling machine, Jig borer, Drilling machine, Horizontal milling machine, Mold processing machine, EDM Machine Center, NC lathe, XYZ axes of heavy cutting machine tools, Grinding head feeding axis of grinding machines, milling machine, Z axis of boring machine and machine tools, EDM, Z axis of...

The Procedure of Select Linear Guideway Identify the operating conditions span, No. of carriages, No. of rails change Parameters for calculating load on the linear guideway • Space available for installation • Size (span, No. of carriages, No. of rails) • Installation position (horizontal, vertical, tilted, or wallhung, etc.) • Magnitude, direction, and location of imposed load • Frequency of use (duty cycle) • Stroke length • Moving speed , acceleration • Required service life, and accuracy • Operating environment Select type Type or size changed Select proper type and size (If applied...

Load Rating and Service Life of Linear Guideway system, the load capacity and service life of the model must be taken into consideration. To verify the static load capacity, the basic static load rating (C0) is taken to obtain the static safety factor. The service life can be obtained by calculating the nominal life based on basic dynamic of a linear guideway is defined as the total running distance that the linear guideway travel until flaking occurs. 4.1 Basic Static Load Rating(C0) A localized permanent deformation will develop between raceways and rolling elements when a linear guideway...

4.2 Static Permissible Moment(Mo) When a moment is applied to a linear guideway, the rolling balls on both ends will receive the most stress among the stress distribution over the rolling elements in the system. The static permissible moment (Mo) refers to a static moment in a given direction with specific magnitude applied at the contact area under the most stress where the sum of permanent deformation develops between the raceway and rolling elements is 0.0001 times the diameter of rolling elements. Therefore, the static permissible moment sets a limit on the static moment. In linear...

Regular industrial Normal loading condition With impact and vibration Normal loading condition With impact and vibration Machine tool Standard value of static safety factor 4.4 Basic Dynamic Load Rating (C ) Even when identical linear guideways in a group are manufactured in the same way or applied under the same condition, the service life may be varied. Thus, the service life is used as an indicator for determining the service life of a linear guideway system. The nominal life (L) is defined as the total running distance that 90% of identical linear guideways in a group, when they are...

I n order to ensure the optimum load capacity of linear guideway system, the hardness of raceway must be HRC58~64. If the hardness is lower than this range, the permissible load and nominal life will be decreased. For this reason, the basic dynamic load rating and the basic static load rating should be multiplied by hardness factor for rating calculation. See figure below. The hardness requirement of PMI linear guideway is above HRC58, thus the fH=1.0. Temperature factor fT When operating temperature higher than 100℃, the nominal life will be degraded. Therefore, the basic dynamic and...

Although the working load of liner guideway system can be obtained by calculation, the actual load is mostly higher than calculated value. This is because the vibration and impact, caused by mechanical reciprocal motion, are difficult to be estimated. This is especially true when the consideration of speed and vibration, the basic dynamic load rating should be divided by the empirical load factor. See the table below. Motion Condition Operating Speed Slight impact & vibration Moderate impact & vibration Strong impact & vibration Load Rating and Service Life of Linear Guideway vibration from...