 Re: wrist pin needle bearing lubrication holes
yes.. Holes should be drilled 120 degrees apart. 3 of them. this is typical with roller bearing uppers. one hole for solid. Solid or Roller bearings can be best. Depends on the metal and roller bearing used. The beauty of a Solid bearing is that when it starts to go, it gives warning. Rollers typically give no warning, and when they go, they take the whole top end, and even the bottom sometimes. Rollers do the most damage by far when they go. As for drilling, I can tell you, the connection rod is super super hard steel. I am not sure you will be able to find a bit hard enough to drill through it. I am sorry to tell you that news.. You should have at least one hole already. Thanks.. |