THK® rails and bearings by Techno Inc.

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[View page 1] previous rfq page next index page home page thk lm rail selection guide photograph description ssr high radial load capacity lm guides caged balltm technology sizes 15 20 25 page 64 high load capacity and very rigid in radial direction compact design with low center of gravity and high rigidity conforms to type hsr shw low profile wide rail lm guides caged balltm technology sizes 17 21 27 68 ideal choice for locations where space is very limited and rigidity under mc moment is required conforms to type hrw srs miniature lm guides caged balltm technology sizes 9 12 15 bearing is compact and lightweight with a single row of balls on each side of the rail conforms to type rsr 70 sr high radial load capacity conventional lm guide size 20 72 high load capacity and very rigid in radial direction techquestions@techno-isel.com 61 2 shs 4-way equal load capacity lm guides caged balltm technology sizes 15 20 25 66 rails carriages and bearings

[View page 2] previous rfq page next index page home page introduction to the caged balltm concept when rotary ball bearings were originally introduced over 150 years ago they were not equipped with a cage this design resulted in high noise levels short service life and low maximum rotating speed consequently the cage was introduced into the bearing design resulting in low noise levels and high rotating speeds in addition the bearings equipped with the cage demonstrated long service life despite the reduced number of balls vs the full complement type rotary ball bearings with the cage evolved significantly over the years thus allowing for a wide range of applications 2 rails carriages and bearings the same cage concept would clearly work in linear ball bearings except for elliptical path of the balls inside the linear bearings being different from the circular path of the balls inside rotary bearings thus the metal cage employed by the rotary bearings could not have worked for the lm guides thk the

[View page 3] previous rfq page next index page home page 2 quiet operation metal-to-metal contact between the balls is eliminated by the ball cage resulting in a quiet operation 3 orderly ball movement since the balls are held by the ball cage in the form of a belt they are uniformly distributed along the raceways of the block there is no skewing of the balls and no sudden variations in friction which results in stable movement 4 long-term maintenance-free operation grease pockets are provided consecutively over the entire ball circulating path to constantly lubricate the balls enabling long-term maintenance-free operation techquestions@techno-isel.com 63 2 rails carriages and bearings