This section provides an overview for stopper bolts as well as their applications and principles. Also, please take a look at the list of 5 stopper bolt manufacturers and their company rankings.
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A stopper bolt is a bolt that positions a workpiece or serves as a stopper.
They are designed to improve positioning accuracy and mitigate impact upon contact. To prevent damage to the workpiece, a stopper bolt with a protective resin bonded to the head is also available.
They are generally used in combination with locknuts. Careful attention is paid to the contact surface, which is hardened to improve wear resistance.
In addition to use as stoppers, stopper bolts are sometimes used in combination with linear stoppers for positioning. It should be used in conjunction with a lock nut to ensure secure setting position adjustment.
They are also used as a source of confirmation signals for automatic control by incorporating a touch switch. There is also a type of stopper bolt that doubles as a shock absorber, serving as a gentle stopper for the object.
Because of its basic role as a stopper, carbon steel such as "S45C or equivalent" is used as the material of the main body, including the contact surface. The contact surfaces are often hardened.
To ensure air resistance, an iron tetroxide coating is applied. Lock nuts used on the piers are also made of SS400 with trivalent chromate treatment.
Examples of touch switch specifications include a contact type contact structure, a stroke of 0.7 mm, an operating point of approximately 0.3 mm from the stopper surface, and an operating point repeatability of 0.01 mm (range) for both ON and OFF. Specifications include a contact accuracy life of 10 million cycles, static load resistance/shock energy resistance of 5000 N/0.4 J, contact rating of 5 V DC to 24 V DC, and a steady-state current of 10 mA or less (inrush current of 20 mA or less).
The main items in the example specifications for shock absorbers include a stroke of 5 mm, a maximum usage cycle of 45 cycles/min, and a maximum equivalent mass of 11 pounds.
*Including some distributors, etc.
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