Assembling the Guide Ball Bushing
Inner Diameter of the Housing
Table1 shows recommended housing inner-diameter tolerance for the Guide Ball Bushing. When fitting the Guide Ball Bushing with the housing, loose fit is normally recommended. If the clearance needs to be smaller, provide transition fit.
| General conditions | H6 |
|---|---|
| If the accuracy does not need to be very high | H7 |
Mounting the Nut
Although the Guide Ball Bushing does not require a large amount of strength for securing it in the LG shaft direction, do not support the nut only with driving fitting. For the housing inner-diameter tolerance, see Table1.
Mounting model LG using a pin
Mounting model LG as with the conventional Linear Bushing
Snap Ring for Installation
To secure the Guide Ball Bushing model LG, snap rings indicated in Table2 are available.
| Snap ring | ||
|---|---|---|
| Model No. | For inner surface | |
| Needle snap ring | C-shape snap ring | |
| LG 4 | 8 | - |
| LG 6 | 12 | 12 |
| LG 8 | 15 | 15 |
Set Screws Not Allowed
Securing the nut by pressing the outer surface with one set screw as shown in Fig.1 will cause the nut to be deformed.
Incorporating the Nut
When incorporating the Guide Ball Bushing into a housing, use a jig and drive in the nut, or use a flatter plate and gently hit the nut, instead of directly hitting the side plate or the seal. (see Fig.2 ).
| Model No. | dr | Tolerance |
|---|---|---|
| LG 4S/LG 4L | 3.6 | ‒0.1 ‒0.3 |
| LG 6S/LG 6L | 5.6 | |
| LG 8S/LG 8L | 7.5 |
Inserting the LG Shaft
When inserting the LG shaft into the Guide Ball Bushing, align the center of the shaft with that of the nut and gently insert the shaft straightfor-ward into the nut. If the shaft is slanted while it is inserted, balls may fall off or the retainer may be deformed (see Fig.3 ).
When Under a Moment Load
When using the Guide Ball Bushing, make sure that the load is evenly distributed on the whole ball raceway. In particular, if a moment load is applied, use two or more Guide Ball Bushing units on the same LG shaft and secure an adequately large distance between the units.
If using the Guide Ball Bushing under a moment load, also calculate the equivalent radial load and identify the correct model number. (See Rated Load and Nominal Life )
