How to control the quality of fastener pins and tapered pins?
Fastener pins and tapered pins are actually similar in use, and generally play a role in positioning. The material is also determined according to different requirements. The common materials of fastener pins are stainless steel SUS304/SUS316, bearing steel, ordinary carbon steel and so on.
The shape of the fastener pin is a cylindrical shape, and there will be chamfers at both ends. The normal chamfer is 15C°, but the size of the chamfer of the fastener pin on the market is uneven. In fact, there are no special requirements. , the size of this chamfer has little effect on the use of fastener pins. The shape of the tapered pin and the fastener pin will be a little different. The shape of the tapered pin is tapered, and it is reduced by 1:50 from one end to the other end. Although it is not very visible to the naked eye, it can be accurately measured with a caliper.
Fastener pins include GB119 and German standard DIN6325. GB119 is generally made of stainless steel SUS304. If you do not have much requirements for product size and strength, you can choose this standard fastener pin, while the DIN6325 standard fastener pin is bearing steel. The fastener pins of this material generally need to be heat treated, and the hardness of the product will be relatively high, which can reach 58-62. The standard of the tapered pin is GB117, and the size requirements of the tapered pin will be stricter. It also depends on the specific application.
