Post by kko110 on Jun 25, 2015 22:23:57 GMT 12
Hi there,
I have been looking through the hobby car and tech manual and have a question regarding minimum thread engagement for spherical rod ends for use on suspension members. It psecifies that a minimum of 1.5 x the diamemter of the rod end must be engaged in the threaded housing. I am looking at using a very large 3/4" UNF rod end in my application and have searched through the top end suppliers ie: AURORA, NMB, FK and have an issue with the amount of adjustability this rule allows as the standard shanks (or threaded portions) are just on the limit of being too short. See CAD drawing below: This shank length is one of the longer shanks (AURORA) that I could find and it uses a thin Hex Jam Nut to secure it. Now on many race cars around the world it becomes obvious that this is not enough adjustability (3mm total or 1.5mm either way of center). Most other race cars have a lot more threaded portion showing so I can only assume that they have far less than 1.5 x diameter engagement. Surely if you are excessively over sizing the rod end in the first place that this could be relaxed a little to allow more adjustability? I know you have to have a blanket rule but I have seen many hot rods driving around that have more thread showing.
Can you please advise on this matter
Many Thanks
Karl
I have been looking through the hobby car and tech manual and have a question regarding minimum thread engagement for spherical rod ends for use on suspension members. It psecifies that a minimum of 1.5 x the diamemter of the rod end must be engaged in the threaded housing. I am looking at using a very large 3/4" UNF rod end in my application and have searched through the top end suppliers ie: AURORA, NMB, FK and have an issue with the amount of adjustability this rule allows as the standard shanks (or threaded portions) are just on the limit of being too short. See CAD drawing below: This shank length is one of the longer shanks (AURORA) that I could find and it uses a thin Hex Jam Nut to secure it. Now on many race cars around the world it becomes obvious that this is not enough adjustability (3mm total or 1.5mm either way of center). Most other race cars have a lot more threaded portion showing so I can only assume that they have far less than 1.5 x diameter engagement. Surely if you are excessively over sizing the rod end in the first place that this could be relaxed a little to allow more adjustability? I know you have to have a blanket rule but I have seen many hot rods driving around that have more thread showing.
Can you please advise on this matter
Many Thanks
Karl