LM Guide Actuator KR
68Pages

Construction and Features (see p.2) Maximum Travel Speed and Maximum > Four-way Equal Load RatingHigh PrecisionHigh RigiditySpace Saving Length (see p.15) Accuracy Standards (see p.16) > Repeat Positioning AccuracyBacklashPositioning AccuracyTravel Parallelism Models (see p.5) > KR-A (with one long nut block) KR-B (with two long nut blocks)KR-C (with one short nut block)KR-D (with two short nut blocks) Outline Dimension Drawings (see p.18) Rated Load and Static Permissible Moment in Each Direction Seals/Options (see p.45) (see p.6) > Rated LoadEquivalent Load (LM guide)Permissible Moment...

Housing BGrease nippleHousing ALM rail Ball screw Nut blockDouble-row ball circuit (Figure 1) Construction of LM Guide Actuator Model KR The LM guide actuator model KR provided with high-rigidity, high-precision functionality and space saving. It isachieved by a nut block designed in a structure that integrates an LM rail having a highly rigid U-shaped cross- sectional form with the LM guide section on both side faces of the nut block and the ball screw section at the center of the nut block.Each row of balls is arranged at a contact angle of 45 so that loads acting on the nut block in the...

6.2 10 > 4 3.8 ח 10 > 5 8.4 10 > 4 8.9 ח 10 > 5 2.4 10 > 5 1.5 ח 10 > 6 2.2 10 > 5 2.3 ח 10 > 6 H R 3 3 3 5 6 K K R 4.6 10 5.9 ח 10 > 2 R K 2 6 X m) R 4 6 I = geometrical moment of inertia around axis X I > K K R 4 5 H K R Y = geometrical moment of inertia around axis Y > 5 K R 5 K R 6 5 Displacement ( 0123456 2004006008001000 (Zero clearance) Load (N) Rolling center of ball

Standard model of KR. Two KR-A nut blocks are provided to achieve higherrigidity, higher load capacity, and higher precision. Shorter KR-A nut block to achieve longer stroke.(Applicable models: KR30H, 33, 45H, 46) Two KR-C nut blocks are provided. Because this modelallows provision of a span suitable for equipment, high rigidity can be achieved.(Applicable models: KR30H, 33, 45H, 46) 5 >

P L P R P T P T LM guide section The KR can carry loads in all directions, i.e., the radial, inverse radial, and two lateral directions. The basicrated load is the same in all four directions, and their values are shown in Table 2 on page 7. ? Ball screw section The KR can carry loads in the axial direction since it incorporates a ball screw in the nut block. The basic ratedload values are shown in Table 2 on page 7. ? Supporting bearing The KR can carry loads in the axial direction since it incorporates an angular bearing in housing A. The basicrated load values are shown in Table 2 on...

Model KR consists of an LM guide, ball screw, and supporting bearing. The rated life span of each componentcan be calculated based on the basic dynamic load rating shown in Rated Loads (Table 2, page 7). > W C L: rated life span (km)(The rated life spanӔ refers to the total traveling distance that 90% of a group of the same LM guidescan achieve without flaking (flakes peeling off the metal surface) when these LM guides are individuallymoved under the same conditions.)C: basic dynamic load rating(N) P > c : calculated imposed load(N)f > w : load factor(see Table 5, page 10)f > c : contact...

Average loadRated life spanf > 3 During forward uniform motionFa > 1 = ?m > g +f=4 N յ : friction coefficient (0.005)f: rolling resistance of individual KR block + seal resistance (2.5 N)During forward accelerationFa > 2 = Fa > 1 +m α =76 NDuring forward decelerationFa > 3 =Fa > 1 -m α =-68 NDuring reverse uniform motionFa > 4 =-Fa > 1 =-4 NDuring reverse accelerationFa > 5 =Fa > 4 -m α =-4 NDuring reverse decelerationFa > 6 =Fa > 4 +m α =68 N* Fa > 3 , Fa > 4 and Fa > 5 are taken to be zero as the load groove is different from the evaluated groove. > a2 P > 1 : buckling load(N) R > a :...

P 2 = ? ? d π 4 12 =35300 N P > 2 : permissible tensile compressive load(N) δ : permissible tensile compressive stress(147 N/mm > 2 )d > 1 : screw shaft thread minor diameter(17.5 mm) > 60 ? λ 2 3 N E 10 ? I -1 1 = ? 2 p ? R b2 γ ? A 0.8 =1560 min N > -1 1 : critical speed(min ) R > b : distance between two mounting surfaces(1300 mm) γ : density(7.85 10 > -6 kg/mm > 3 ) λ : installation procedure coefficient(fixed - supported 3.927)0.8: safety factor > DN=31125 ( 50000)D: ball center diameter(20.75 mm)N: max. operating rotational speed(150 min > -1 ) > Average axial load > 3 Fa > m = (Fa R...

Average axial load > 3 Fa > m = (Fa R > 13 S 1095+Fa > 23 52.5+Fa > 63 52.5) =25.5 N12 ? Rated life spanf > L= Ca 3 f w ? Fa m 10 6 =1.53 10 13 rev. W : load factor(1.2)* The above rated life span is converted to the traveling life span of the ball screw.LS=L? R 10 > -6 =3.06 10 > 8 Km > The following table summarizes the evaluation results. > KR5520AStatic safety factorBuckling load (N) LM guide section33.9֖ ֖3.25 10 Permissible tensile compressive load (N) Critical speed (min ז1 )DN valueRated life span (km)Max. axial load (N) 10 6 ח 10 7 8 ֖ Ball screw section122.211000353001560311253.32...

KR15 A (with one nut block)KR15 KR45H A (with one long nut block)KR45H B (with two nut blocks) B (with two long nut blocks)KR45H C (with one short nut block)KR45H > D (with two short nut blocks) KR15 A (with one nut block)KR15 B (with two nut blocks) > B (with two long nut blocks)KR45H KR2001A (with one long nut block)KR2001B (with two long nut blocks) C (with one short nut block)KR45H D (with two short nut blocks) > KR2001A (with one long nut block)KR2001B (with two long nut blocks) KR46 A (with one long nut block)KR46 B (with two long nut blocks)KR46 C (with one short nut block)KR46 > D...

KR2001A (With one long nut Block)KR2001B (With two long nut Blocks) > 1 LM rail length Ball screw side(opening chamfered to radius 1.3) 8.56 46 2.5 10 10 33.2 3.5 4920L 2 x n-3.4 drill through 6.5 counterbore x 3 deep 4-M3 x 4.5 deep 4h7 18 踸20H7 20 133.4215.8 46MIN 39.633.6 (Distance of two nut blocks in a double block) 0.9 10 A 2 x 2-M2.6 x 4 deep(same position on opposite side) 2-M2.6 x 6 deep BB 60(n-1) G(G) 121225 148 60 Nipple orientationWhen one nut block is usedWhen two nut blocks are used 3.4 tap through 231840115 30 12.5 谰 30 3.3 4-M3 x 6 deepView A 4- 0.5 3029.59.5 PCD 29 Section...