20-09-2021, 08:12 PM
Jamie,
The short answer: I wouldn't even think about making them, why would you when they are readily available from the Seven Workshop. By the time you made them and heat treated them they would cost you way more. From memory they are about £60 an axle set. Not worth the time hassle and risk of getting it wrong.
The longer answer: Spring pins like that can be safely made using EN24T to run in phosphor bronze bushes. It has the advantage of being machinable with a decent lathe. The problem is that the spring shackle isn't a simple pin.
Do not think about using silver steel for this application, it is often not a brilliantly controlled material with batch variance, and not to be used for safety critical applications. The heat treatment also adds to a degree of uncertainty adding to risk. Although not high tech Austin Sevens were not "over engineered" so the room for error on materials is less than on some other vehicles.
Sorry if you know all of this. I just didn't want someone else to read the post and then go off and make bits in silver steel they have lying around and think everything will be OK.
Exact manufacturing process of the front shackles and pins, I could not tell you, but I would expect the suppliers to know if you really wanted to know. However there is no way you could make them for the cost that they do them for.
All the best
Tom
The short answer: I wouldn't even think about making them, why would you when they are readily available from the Seven Workshop. By the time you made them and heat treated them they would cost you way more. From memory they are about £60 an axle set. Not worth the time hassle and risk of getting it wrong.
The longer answer: Spring pins like that can be safely made using EN24T to run in phosphor bronze bushes. It has the advantage of being machinable with a decent lathe. The problem is that the spring shackle isn't a simple pin.
Do not think about using silver steel for this application, it is often not a brilliantly controlled material with batch variance, and not to be used for safety critical applications. The heat treatment also adds to a degree of uncertainty adding to risk. Although not high tech Austin Sevens were not "over engineered" so the room for error on materials is less than on some other vehicles.
Sorry if you know all of this. I just didn't want someone else to read the post and then go off and make bits in silver steel they have lying around and think everything will be OK.
Exact manufacturing process of the front shackles and pins, I could not tell you, but I would expect the suppliers to know if you really wanted to know. However there is no way you could make them for the cost that they do them for.
All the best
Tom