LM Guide HSR — Four-Way Equal-Load Type - THK

1 A-262LM Guide HSR Four-Way Equal-Load TypeFig. 1 Construction of Model HSRLM blockEnd plateEnd sealLM railGrease nippleBallConstruction and FeaturesSide sealCross SectionInner seal (option)Retainer plateRetainer plateFour-way equal loadThe raceways are arranged at 45 in relation oneanother, so that each train of balls bears an equal ratedload in all four directions: radial, reverse-radial, and thetwo lateral directions. This type can therefore be usedin any installation directions and boasts a wide range rigidityThe excellent balance among the four rows ofraceways enables the application of a sufficientpreload, providing the LM Guide with a high degree ofrigidity and freeing it from undesired , due to the strength of the mounting boltsand LM block used, type HSR is in use in a wide rangeof heavy-cutting machine capabilitySelf-adjustment is performed automatically due to thecircular-arc groove design (face-to-face DF).

2 Installation errors can therefore be compensated for,even under a preload, resulting in highly precise andsmooth linear durabilityEven under a preload or uneven load , no differentialsliding occurs to the balls, thereby enabling smoothball rolling. Wear is thus limited, and long-termprecision is steel type availableUpon request, we can provide stainless steel LMblocks, rails, and roll in four rows of a precisely-ground raceway on an LM rail and an LM block. The end plate attached tothe LM block causes the trains of balls to the balls are held in place by the retainer plate, they do not fall off if the LM block is removed from the rail(except for types HSR 8, 10, and 12).

3 The four trains of balls are arranged so that the contact angle is 45 , allowing each train of balls to bear an equalrated load in all four directions: radial, reverse-radial, and the two lateral directions. This type can therefore beused in any installation direction. Moreover, HSR enables the application of a well-balanced preload, making itpossible to increase rigidity in the four directions while maintaining a low friction coefficient. The low-profiledesign and use of high-rigidity LM blocks provide stable, highly accurate linear BERG AB Тел.

4 (495)-727-22-72, ф. (495)-223-3071A-263A-IVTypes and FeaturesStandard heavy- load typesThe flange of the LM block isprovided with tapped holes to enablesimple assembly, making it suitablefor use in build-up typeThe LM blocks can be attached to atable from below. For use with atable in which a through hole cannotbe typeThe narrowed flange of the LMblock is provided with tapped holes,making it convenient for use in build-up systems. Can be used to replacethe former type typeType HSR-AType HSR-BType HSR-RStandard ultra-heavy- load typesWhile the cross-sectional dimensionsare the same as for type HSR-A, theLM block is longer.

5 The number ofeffective balls is greater than in typeWhile the cross-sectional dimensionsare the same as for type HSR-B, theLM block is longer. The number ofeffective balls is greater than in typeWhile the cross-sectional dimensionsare the same as for type HSR-R, theLM block is longer. The number ofeffective balls is greater than in typeType HSR-LAType HSR-LBType BERG AB Тел. (495)-727-22-72, ф. (495)-223-3071A-264 Miniature Four-Way Equal-Load typeHeavy-duty Four-Way Equal-Load typeHSR 8/10/12 RCan be used for large machinetools and even buildingsHSR 100/120/150HA/HB/HRThis series features the smallestLM Guide models.

6 As the LMblock is slim, it must be fastenedin place using the tapped holesprovided on the top BERG AB Тел. (495)-727-22-72, ф. (495)-223-3071A-265A-IVLoad Rating and Permissible Moment in Various DirectionsFIg. 2 load ratingType HSR can bear loads in all four directions: radial,reverse-radial, and two lateral basic load ratings of HSR are equivalent to oneanother in all four directions (radial, reverse-radial andtwo lateral directions). The values are presented in thecorresponding dimension loadAn equivalent load for type HSR when loads in all fourdirections are exerted on its LM block simultaneouslycan be obtained using the following equation:PE= PR(PL)+PTwherePE: equivalent load (N)- In the radial direction- In the reverse-radial direction- In the lateral directionPR: radial load (N)PL: reverse-radial load (N)PT: lateral load (N)Permissible momentFIg.

7 3In type HSR, a single LM block can bear moments inall directions. Table 1 presents the permissiblemoments in directions MA, MB, and MCfor a single LMblock and two LM blocks laid over one another (nodata for direction MC). BERG AB Тел. (495)-727-22-72, ф. (495)-223-3071A-266 8 HSR 10 HSR 12 HSR 15 HSR 20 HSR 20 LHSR 25 HSR 25 LHSR 30 HSR 30 LHSR 35 HSR 35 LHSR 45 HSR 45 LHSR 55 HSR 55 LHSR 65 HSR 65 LHSR 85 HSR 85 LHSR 100 HSR 120 HSR 150.

8 KNmTable 1 Static Permissible MomentModel symbolSingle blockSingle blockSingle blockDouble blockDouble blockAccuracy StandardsFig. 4MW2 The accuracy of type HSR is divided into five grades,normal, high, precision, super-precision, and ultra-precision, in accordance with the model numbersshown in Table 2. C DFig. 5 Relationship Between LM-Rail Lengthand Running ParallelismNormal gradeLM-Rail length (mm) BERG AB Тел. (495)-727-22-72, ф. (495)-223-3071A-267A-IV 8 HSR 10 HSR 12 HSR 15 HSR 20 HSR 25 HSR 30 HSR 35 HSR 65 HSR 85 HSR100 HSR120 HSR150 HSR 45 HSR 55 Unit.

9 MmTable 2 Accuracy StandardModel standardItemHighHNormalNo symbolPrecisionP SP UPSuper-precisionUltra-precisionToleranc e for height MTolerance for the height M difference among LM blocksTolerance for rail-to-block lateral distance W2 Running Parallelism ofsurface C with surface ARunning parallelism of surface D with surface BTolerance for rail-to-block lateral distance W2 difference among LM blocks C (as per Fig. 5) D (as per Fig. 5)Tolerance for height MTolerance for height MTolerance for the height M difference among LM blocksTolerance for the height M difference among LM blocksTolerance for rail-to-block lateral distance W2 Tolerance for rail-to-block lateral distance W2 Tolerance for rail-to-block lateral distance W2 difference among LM blocksTolerance for rail-to-block lateral distance W2 difference among LM blocksRunning Parallelism ofsurface C with surface ARunning Parallelism ofsurface C with surface ARunning parallelism of surface D with surface BRunning parallelism of surface D with surface B

10 C (as per Fig. 5) C (as per Fig. 5) D (as per Fig. 5) D (as per Fig. 5) D (as per Fig. 5) D (as per Fig. 5) C (as per Fig. 5) C (as per Fig. 5)Tolerance for height MTolerance for height MTolerance for the height M difference among LM blocksTolerance for the height M difference among LM blocksTolerance for rail-to-block lateral distance W2 Tolerance for rail-to-block lateral distance W2 Tolerance for rail-to-block lateral distance W2 difference among LM blocksTolerance for rail-to-block lateral distance W2 difference among LM blocksRunning Parallelism ofsurface C with surface ARunning Parallelism ofsurface C with surface ARunning parallelism of surface D with surface BRunning parallelism of surface D with surface