Catalogue - LM Guide Actuator KR - THK - (Version JPG)

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Linear ball bearing, Roller bearing, Linear ball guide, Bearing, Linear guide

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• Life Span

^Lh 2 n^60

L_h : life span

(h) (mm)

: stroke length

: number of forward and reverse motions per minute (min¹)

: ball screw's lead

(mm)

f ■ contact factor

If two nut blocks are used in a double block on model KR-B/D, multiply the basic load rating by the contact factor shown in Table 4.

(Table 4) Contact Factor (fc)


	Type of Nut Block	Contact Factor fc
	Types A/C	1
	Types B/D	0.81

f_W: load factor

(Table 5) Load Factor (fw)


Vibration or Impact	Velocity (V)	fw
Minute	For crawling VS0.25 m/s	1 to 1.2
Small	For slow speed 0.25<VS1 m/s	1.2 to 1.5
Medium	For intermediate speed 1<VS2 m/s	1.5 to 2
Large	For high speed V>2 m/s	2 to 3.5

K: moment equivalent coefficient (LM guide)

If traveling is performed with moment applied, the load-carrying distribution of the LM guide increases locally. In this case, multiply the moment value with the moment equivalent coefficient shown in Table 6 to calculate the load.

K_A, K_B and K_C show the moment equivalent coefficient in the M_A, M_B and M_C directions, respectively.

(Table 6) Moment Equivalent Coefficient (K)


Model	Ka	Kb	Kc
KR15-A	3.2x10^-1	3.2x10^-1	9.09x10^-2
KR15-B	5.96x10^-2	5.96x10^-2	9.09x10^-2
KR20-A	2.4x10^-1	2.4x10^-1	7.69x10^-2
KR20-B	4.26x10^-2	4.26x10^-2	7.69x10^-2
KR26-A	1.73x10^-1	1.73x10^-1	5.88x10^-2
KR26-B	3.06x10^-2	3.06x10^-2	5.88x10^-2
KR30H-A	1.51 x10^-1	1.51 x10^-1	4.78x10^-2
KR30H-B	2.76x10^-2	2.76x10^-2	4.78x10^-2
KR30H-C	2.77x10^-1	2.77x10^-1	4.78x10^-2
KR30H-D	3.99x10^-2	3.99x10^-2	4.78x10^-2
KR33-A	1.51 x10^-1	1.51 x10^-1	4.93x10^-2
KR33-B	2.57x10^-2	2.57x10^-2	4.93x10^-2
KR33-C	2.77x10^-1	2.77x10^-1	4.93x10^-2


Model	Ka	Kb	Kc
KR33-D	3.55x10^-2	3.55x10^-2	4.93x10^-2
KR45H-A	9.83x10^-2	9.83x10^-2	3.45x10^-2
KR45H-B	1.87x10^-2	1.87x10^-2	3.45x10^-2
KR45H-C	1.83x10^-1	1.83x10^-1	3.45x10^-2
KR45H-D	2.81 x10^-2	2.81 x10^-2	3.45x10^-2
KR46-A	1.01 x10^-1	1.01 x10^-1	3.38x10^-2
KR46-B	1.78x10^-2	1.78x10^-2	3.38x10^-2
KR46-C	1.85x10^-1	1.85x10^-1	3.38x10^-2
KR46-D	2.5x10^-2	2.5x10^-2	3.38x10^-2
KR55-A	8.63x10^-2	8.63x10^-2	2.83x10^-2
KR55-B	1.53x10^-2	1.53x10^-2	2.83x10^-2
KR65-A	7.55x10^-2	7.55x10^-2	2.14x10^-2
KR65-B	1.35x10^-2	1.35x10^-2	2.14x10^-2

(Note) For model KR-B/D, the moment equivalent coefficient is the value when two nut blocks are used in a double block.

LM Guide Actuator KR - THK - #11

Linear ball bearing, Roller bearing, Linear ball guide, Bearing, Linear guide