Rated Load and Static Permissible Moment in Each Direction

Rated Load

P L P R The SKR-type LM guide actuators with Caged BallTechnology consist of the LM guide, ball screw,and support bearing. Table 4 shows the ratedloads.
P T P T • LM guide section The SKR-type can carry loads in all directions, i.e., the radial, reverse-radial, and two lateral directions. Thebasic rated load is the same in these four directions and their values are shown in Table 4.
? Ball screw section The SKR-type can carry loads in the axial direction since it incorporates a ball screw nut in the nut block. The basic rated load value is shown in Table 4.
? Support bearing The SKR-type can carry loads in the axial direction since it incorporates an angular bearing in housing A. The basic rated load value is shown in Table 4.

Equal Load (in the LM Guide)

When loads are simultaneously applied to the SKR-type's LM guide in all directions, the equivalent load isobtained by the following equation. P
E = P
R (P
L ) + P
T whereP
E : equivalent load(N)In the radial directionIn the reverse-radial directionIn the lateral directionsP
R : radial load(N)P
L : reverse-radial load(N)P
T : load in the lateral directions(N)
Table 4 Rated Loads Model SKR33 17000 11300 20400 115000 to –0.004 –0.004 to –0.012136 10 20 10.8 13.54400 2700 26206290 3780 3770 6250 2700 SKR46 39500 28400 45900 28700 0 to –0.006 –0.006 to –0.016151020 12.5 15.7543504240 69907040 6700 3330 LM GuideBasic dynamic rated load C (N)Long type block, types A & BShort type block, types C & DLong type block, types A & BShort type block, types C & DBasic static rated load C (N)Radial clearance (mm) Standard/high qualityPrecision qualityBall ScrewScrew shaft outer diameter (mm)Lead (mm)Root diameter (mm)Ball center diameter (mm)Basic dynamic rated load C a (N)Basic static rated load C 0a (N)Basic dynamic rated load C a (N)Permissible static load P 0a (N)SupportBearing Notes: ? The rated load of the LM guide is the rated load per nut block.? Model SKR3320 has no short type block.

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