Ahora me gustaría enfatizar que diferencia hay entre perno hexagonal y …
Primeno, no hay cara con arandela arriba de la cabeza de perno hexagonal y si la hay arriva de la cabeza del tornillos de casquete
Segundo, los grados de perno hexagonal son ASTM A307 Gr.A.
Éste es A307 Gr.A, este es nuestra marca JM, pueden tener su marca aquí.
Los grados de tornillos de casquete son SAE J429 Gr.2, Gr.5 &Gr.8
Este es Gr.5 y este es Gr.8
Shanghai Jian&Mei es una empresa profesional que produce pernos, nuestro productos son aplicados principalmente en las areas Acero estructural, Edificio metal, Petróleo&Gas, Torre&Polo, Viento, Energía, Máquina mecánica, automóvil, Decoración etc.
Ofrecemos todos los tamaños.
El material sería acero al carbono, acero de aleación, acero inoxidable y cobre.
Grados disponibles de pernos son SAE J429 Gr 2,5,8, ASTM, A307,A490,ASTM A193 B7 and class 4.8 6.8 8.8,10.9,12.9,
El acabado sería Zinc, Zinc amarillo, Óxide negro, HDG etc.
Exportamos Perno hexagonal & Tornillos de casquete con alta calidad al mercado américa más de 8 años y nos disfrutamos muy bueno reputación, somos su prroveedor reliable de elementos de sujeción.
No duden en contactarno en cualquier momento.
Shanghai Jian & Mei Industry and Trade Co., Ltd
Rm.27202, No.295 South Lingyan Road, Pudong,Shanghai,P.R.C, Code:200126
Tel: 0086-21-33328690-8058
Fax: 0086-21-68413263
English Web：www.jm-industry.com Websit: https://www.jmtornillo.com
Contact: Mrs.Xarella Huang
Email: Jminfo@jm-industry.com
Websit: https://www.jm-industry.com
The video describes replacing the chain-rings on an integrated spider crank. The inner ring is bolted directly to the spider, the middle is mounted to the inside of the spider while the outer is mounted to the outside. They are joined by 5 hex head bolts that pass through the outer ring and the spider, and then through the inner ring into a slotted nut. Installation is straight forward. It is suggested to use a crank removal tool as trying to free the crank arm from the spindle by hitting it with a piece of wood is next to impossible (you can see the results in the footage when looking at the inside of the crank arm. I’ve also heard, that by removing the crank arm bolt and riding around a bit will loosen the crank arm too. However because the spindle is steel and the crank aluminum you’re sure to damage the crank and maybe yourself.
As an aside, the issue I was having with my derailleur was caused by the chain rubbing against the rear fender (duh, comes to mind). I did however have to reset the limit screws on the front derailleur because the chain rings are slightly different than the originals.
Many of the parts on this build came from Peter White Cycles (www.peterwhitecycles.com)