Why the pressure riveting nut lock

 

Fasteners used often reflect: why pressure riveting nut locking stainless steel fasteners, sometimes there will be a question that often attack and in the use of carbon steel fasteners is not similar appearances, is stainless steel fastener material is relatively soft, the cause of the carbon steel fasteners are relatively hard? That's right!

Stainless steel and carbon steel are fundamentally different. Stainless steel has good ductility, but its hardness is necessarily gap with carbon steel. Pressure riveting nut type 316 stainless steel standard and the hardness is, in fact only reached the equivalent of A4-80 carbon steel hardness level of 8.8 on the Richter scale are unlikely. However, it was only half right. Lock (Thread Galling) often attack on stainless steel, aluminum alloy and titanium alloy fasteners, this a few kinds of metal alloy itself have rust, damage in appearance, in a thin layer of metal surface oxide layer (with pressure riveting nut, stainless steel is chromium oxide) to avoid further further corrosion. When stainless steel fasteners are locking, tooth lines between the pressure and thermal damage of chrome oxide layer and erase the meantime, make the metal teeth lines directly attack blocked/shear, the appearance of gelling and attack.

When the appearance of the gelling sustained attack (generally no more than a ring in good tooth diameter), will be made of stainless steel fasteners completely locked, can no longer be unloaded or locked. Generally a series of jam and shear locking to stick together, in just a few seconds, a series of actions are attack, therefore, to understand the characteristics of stainless steel products and comply with accurate operating procedure is to avoid the first step on the stainless steel fasteners, lock.

How do we avoid stainless steel locking screws?

Many users will encounter stainless steel screws and nuts in the process of screw in onset of lock, the reason is nothing more than 304 (or 316), ductility and viscosity is bigger, the data that we can from the process of turning the significant, experienced teachers bo will find 304/316 bar in the processing, the chip is out of corrugated shape, and other materials such as brass or iron chip in the cutting process to present fragmental or filiform. If use electric hurtling screw-in or when stainless steel screws and nuts to accept large torque, thread start open hot touch, a touch point attack adhesion to move a large, achievement is female and male bonding in the locked together, this set of bolt set is discarded, of course, may also result in artifacts are all devices also became a bad product.

In the process of many years of manufacturing and dealing with complaints, come to the conclusion that can be useful to drop considerably or completely avoid the stainless steel screw lock attack and apply the method in the process of the device. We in the thread rolling tire and transport packaging products to manipulate the thread protection (of course, even if the thread tooth damage such as peak also does not affect the bruised antilock plan), and the thread is coated with a handful of manufacturing stainless steel screws antilock oil processing.

No matter the user use electric stuff is still the overload torque or stainless steel screws and nylon lock nut screw in high-speed, locking will not happen, as carbon steel use. The user can device doesn't change things and is in the process of using method of cases will be lost to minimize or avoid completely.