How to replace (install and remove) an Oiles bearing (plain bearing)

Installation

Installation (press-fitting)

Install (press-fit) using hydraulic pressure, pneumatic pressure, or a vise.

Press-fitting with force, such as hammering, will result in bearing damage or a change in its bore.
When installing, use the recommended tolerance (H7) for the dimensions of the housing bore as shown in the catalog.
#500SP1 SL1 spherical bearing (SPS): K7 (general use), N7 (high loads)
#2000 high-precision bearings (CLB and CLF): H6

When replacing a bearing in a blind hole, the design of the surroundings must take removal into consideration.

Press-fitting jig

In general, use a mandrel to insert the bushing in the insertion site in the housing as shown in Figure 1.
The use of a guide ring, as shown in Figure 2, facilitates press-fitting.
The use of a guide ring is effective at ensuring the roundness and centering of the bore after press-fitting and in preventing damage to the bushing during press-fitting.

Figure 1 Typical press-fitting Figure 2 Press-fitting with a guide ring

To facilitate press-fitting of the bushing, the edge of the housing bore should be chamfered where the bushing will be inserted.
The housing should have an R chamfer or a tapered chamfer.
If it has a C chamfer (C1.0 or less), make sure there are no burrs. The use of oil or grease can facilitate press-fitting.

Mandrel dimensions should be determined based on the table below.

Bushing dimensions (nominal)	Mandrel dimensions
Inner diameter(D₀)	d₀=D₀-(0.05～0.10)
Outside diameter(D₁)	d₁=D₁-(0.20～0.30)
Length(L)	ℓ≧L

Figure 3 Mandrel dimensions

Guide ring dimensions should be determined based on the table below.

Bushing inner diameter	Guide ring inner diameter	Guide ring outside diameter
Φ40	D₁+(0.1～0.3)	D₁+(10～15)
Φ42～φ60	D₁+(0.2～0.5)
Φ65～	D₁+(0.5～1.0)

The inner diameter of the guide ring should be large enough to allow gentle press-fitting of the bushing by hand.
The length of the guide ring should be at least 1/3 of the length of the bushing. If possible, it should be the same length as the length of the bushing.

Figure 4 Guide ring dimensions

When using a screw on a metallic bearing to prevent loosening or turning

A screw to prevent loosening and turning must be installed in a position away from load points. After the bearing is set in the housing, a locking screw with a diameter equivalent to the thickness of the bearing wall should be machined at a position towards the housing by about 20 to 30% of the screw diameter as shown in Figure 5.
An end mill should be used when machining holes.

Figure 5 Position to prevent turning (reference image)

Removal

When using a screw on a metallic bearing to prevent loosening or turning

After removing the screw, the bushing can easily be removed using a mandrel in the same manner as during press-fitting.

Removal jig (for a through hole)

Figure 6 Mandrel dimensions