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SAMICK LINEAR BUSHING
- Installation Guide

Recommended Tolerance of Housing bore for SAMICK Linear Bushing are in Table. Normal fit is standard, but for without clearance, pressed fit is also available.

하우징 내경공차
Type Case
Part number Grade Normal fit Pressed fir
LM Higher(H) H7 J7
LME - H7 K6,J6
LMF/FP
LMK/KP
LMH/HP
LM_L
LMF/FP_L
LKM/KP_L
LMH/HP_L
LMFM 		- H7 J7

Clearance of Outer sleeve and Shaft

Normal fit is standard for using of Linear Bushing with LM shaft. And, for without clearance, tight fit is available. Next table shows outer diameter tolerance of shaft.

표8. 축외경공차
Type LM Shaft
Part number Grade Normal fit Tight fit
LM Higher(H) f6,g6 h6
LME - h7 K6
LMF/FP
LMK/KP
LMH/HP
LM_L
LMF/FP_L
LKM/KP_L
LMH/HP_L
LMFM 		- f6,g6 h6

Negative diametric clearance should not exceed what is specified in the dimension table.

Radical Clearance(㎛)
Type/Dr. 5 6 8S 8 10 12 13 16 20 25 30 35 40 50 60
LM(㎛) -3 -5 -5 -5 -5 -5 -7 -7 -9 -9 -9 -13 -13 -13 -16
LME(㎛) -5     -5   -7   -7 -9 -9 -9   -13 -13 -16

Mounting

High holding strength toward LM shaft direction is not required, but just press fit only for mounting is not recommended.

Standard type

Feasible mounting methods are illustrated in Fig 8 and Fig 9. At this moment, fix the linear bushing with retaining rings and cover plates

Retaining ring for Mounting

Retaining ring for LM type SAMICK Linear Bushing are used for mounting as shown in the table below.

Part number Retaining ring(mm)
External (for Shaft) Internal(for Bore)
C type Needle type C type Needle type
LM 5 10 10 10 10
LM 6 12 12 12 12
LM 8 - 15 15 15
LM 8S - 15 15 15
LM 10 19 19 19 19
LM 12 21 21 21 21
LM 13 23 22 23 -
LM 16 28 - 28 28
LM 20 32 - 32 32
LM 25 40 40 40 40
LM 30 45 45 45 45
LM 35 52 52 52 52
LM 40 - 60 60 60
LM 50 - 80 80 80
LM 60 - 90 90 90

Note) The information in the table are common for LM and LM-L type

Setscrew mounting prohibited

Mounting a Linear Bushing with a set screw as show in Figure will cause deformation of the outer sleeve and should be avoided.

Flanged type

Mounting for LMF, LMK, LMH (included long type), only mounting the flange with mounting bolt can be all of mounting because of its single body shape. Geometric Dimensional Tolerance should be considered when the Outer Sleeve is the datum for installation.

  

Mounting of Adjustable type

Adjustment of clearance for Adjustable type (AJ) and LM shaft can be obtained by assembling with the adjustable type Housing. In this case, the slotted side of Linear Bushing should be located at 90˚of open side of Housing for equivalent deformation against radial direction.

Mounting of Open type

Open type(...OP) also can be used with clearance adjustable housing as shown on Figure. Light pre-load is applied for normal using, but heavy pre-load should be avoided.

Mounting of Shaft support

Shaft support, SK can be mounted with mounting bolt for table, and LM shaft can be mounted with tightening bolt

Mounting of LM Case Unit

Mounting of SC type Both side mounting of SC(E), SC(E)_W, SC(E)_V type from the top and the bottom side with mounting bolt are both available, and it gives you minimum mounting time.

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