Positioning beads called ball plunger or plunger spring. Is composed of a shell, a spring, ball or cylinder body load equipment ( SLDs ). Widely used in some medical equipment, lubrication equipment, pneumatic tools and other products. Engineers often in die, fixture, assembly work to use it. With the aid of a pressure spring to push the movement of the sphere, the equipment running smoothly.
Positioning beads ( aka touch beads ) as can provide pressure and accurate positioning of the components, the fixation every kind of, roughly press-in and screw locking type.
Thread with a groove and the inner six angle two locking mode, pressing the outer shell is a stainless steel and plastic two. Column itself is long, short, standard, in order to adapt to the stress and the fixing body. Spring is divided into light load and heavy load two.
Sphere material has hardened steel or stainless steel, can also use artificial material nylon, Polyoxymethylene (POM spring device ) or phenolic resin. These materials offer high strength and durability are flexible enough, the use of specific force material depending on the requirements, such as soft metallic materials used nylon ball head is a must.
Spring ball plungers should have accurate end pressure, through the narrow as possible bushing bolt head thickness, as far as possible the use of long spring quality, can reduce the spring fatigue and increase its service life, and easy to install. Each plunger piston body protrudes from the ball must be uniform in height. Precise process control and strict testing procedures, to ensure that each plug ball head protruding height difference in size between the maximum not exceeding 0.1mm. Some specifications shall not exceed 0.05mm.
The positioning ball has the advantages of simple structure, provided with previous fastener completely different functions, but to create a full compliance with the standards of the product is not simple, the key points in the pressure and bead height control. Suitable as a stopping component or suitable to fixed-point, positioning, indexing, lock, latch, ejector, lifting and other similar push application.