Structure and Features

Types

L-Balls are self-aligning rod-ends consisting of a special die-cast zinc alloy body and a studded ball which has its axis at right angles to the body. They can perform tilting movement, oscillating movement and rotation with low torque, and transmit power smoothly due to uniform clearance between the slidingsurfaces.Their superior wear resistance assures stable accuracy for long periods of time, and maintenance is simple.They are very economical bearings.For these reasons, they are widely used in link mechanisms in automobiles, construction machinery, farm and packaging machines, etc.
L-Balls are available in various types as shownin Table 1.

Table 1 Type of L-Balls
Type L-Ball
L-Ball dust
cover
Model code LHSA LHS PRC

L-Ball LHSA

These are compact rod-ends in which the spherical part of the ball-stud are held by the special die-cast zinc alloy body. There is a dust cover on the stud side and good quality lithium soap base grease is prepacked. They can be run for long periods of time without
re-lubrication and have excellent lubrication and anti-dust properties. As shown in the structural drawing, these rod-ends are classified into 3 types by size. In addition, the ball-studs of LHSA 10 and lower are formed in one solid body, but those of LHSA 12 and higher, which are used under large loads, have the stud frictionwelded to a high precision steel ball to give greater resistance to wear.

L-Ball LHS

These rod-ends have a friction-welded ball-stud, and a special die-cast zinc alloy body which houses the spherical surface of the high precision steel ball. There is an almost complete contact across the sliding surfaces, and the uniform clearance guarantees a stable bearing life. An L-Ball dust cover can be attached to these rodends.If the rod-ends are lubricated with lithium soap .

base grease, they have excellent lubrication and antidust properties and can run for long periods of time without re-lubrication. When the L-Ball LHS is delivered with a dust cover on request, lithium soap base grease is prepacked.

L-Ball Dust Cover PRC

This is for the L-Ball LHS series. It is made of special synthetic rubber which has excellent resistance to oil and ozone. The cover offers very effective dust protection and prevents grease leakage.

Identification Number

The identification number of L-Balls consists of a model code, a size and any supplemental codes as shown in the examples.

Accuracy

The accuracy of L-Balls is shown in Table 2.
Table 2 Tolerance

Selection of L-Balls

The static load capacity and maximum operating load of L-Balls are determined in consideration of the strength of the ball stud and the body. Accordingly, LBalls are selected on the basis of the static load capacity Cs shown in the dimension table and the  maximum operating load shown in Table 3.

Static load capacity

The static load capacity Cs shown in the dimension table represents the allowable axial force F which is determined by the mechanical strength of the ballstud at the section 'A' under the bending moment due to the force F as illustrated in Fig. 1. If F increases beyond the static load capacity, deformation will begin at A, leading to breakage.

Maximum operating load

The strength of the body must also be taken into consideration when L-Balls are operated in a high-temperature or low-temperature atmosphere or receive repetitive loads of long duration or shock loads. A guideline for maximum operating load of L-Balls is shown in Table 3. When the fixing bolt in the main body is fixed and a load is applied in the direction of  F��, the bending stress in the fixing bolt must be taken into consideration.

Lubrication

LHSA is prepacked with lubricating grease ALVANIA GREASE 2 (SHELL). LHS is not provided with prepacked grease. Perform proper lubrication for use.Operating LHS without lubrication will increase the wear of the sliding contact surface or cause seizure.

Operating Temperature Range

The maximum allowable temperature for L-Balls is +80��

Precautions for Use

Depth of thread

It is recommended that the depth of thread engagement into the body is more than twice the nominal diameter of thread.

Permissible angle of tilt

The permissible angle of tilt is shown in Table 4.

Depth of thread

It is recommended that the depth of thread engagement into the body is more than twice the nominal diameter of thread.

Permissible angle of tilt

The permissible angle of tilt is shown in Table 4.